JP3092303B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, for example, a recording 3.5-inch floppy disk, it relates to a disk apparatus having an optimum sheet catcher Tsu <br/> terpolymers open arms to you play.

[0002]

2. Description of the Related Art Conventionally, in a disk device for recording and reproducing a 3.5-inch floppy disk, when a cassette accommodating a floppy disk is inserted into a cassette holder as a loading member, the cassette is placed on the cassette holder. The shutter of the cassette is opened by a shutter opening / closing arm that also serves as a trigger arm that is rotatably mounted, and when the insertion of the cassette is completed, the lock at the return position of the slide plate, which is the driving member, is released.
By moving the slide plate from the backward movement position to the forward movement position by the tension coil spring, the cassette holder is driven from the loading start position to the loading position by the sylado plate, and the floppy disk in the cassette is loaded onto the spindle and the disk table. One that is configured to do so is considered.

Conventionally, when a shutter opening / closing arm also serving as a trigger arm is rotatably assembled on a cassette holder, a flange additional tightening shaft constituting a fulcrum shaft is inserted through the shutter opening / closing arm and the cassette holder, and the flange additional tightening is performed. The lower end of the shaft was fixed by caulking to the cassette holder. However, when the shutter opening / closing arm also serving as the trigger arm is assembled on the cassette holder by the method of caulking the flange additional tightening shaft as in the related art, the number of parts, processing man-hours and assembly man-hours are large, and the caulking jig is also required. It is necessary, it takes time for the assembling work, and there is a problem that the cost is high. Further, in the conventional method in which the flange additional tightening shaft is swaged to the cassette holder, there is a problem that the shutter opening / closing arm cannot be disassembled and repaired from the cassette holder.

Accordingly, Japanese Patent Application Laid-Open No. 63-39169 discloses a conventional method.
Official Gazette and Japanese Utility Model Laid-Open Publication No. 3-98744 (Microfilm
Cassette holder as seen in the official gazette published in
The assembly structure of the shutter opening / closing arm on top has been developed.
You. At this time, JP-B-63-39169 discloses a cassette.
A pair of ribs on the outer periphery of the upper end of the boss provided on the holder
Formed, on the outer circumference of the through hole formed in the shutter opening and closing arm
Form a pair of notches to allow the shutter opening / closing arm to be transparent
Insert the hole around the boss on the cassette holder with the hole
At this time, adjust the angle of the pair of notches to the pair of ribs at the upper end of the boss.
To the position below the rib.
After inserting, rotate the shutter opening / closing arm in one direction.
The angle of the notch to the angle of the rib
The shutter opening / closing arm is bossed with ribs
It is prevented from falling off from the upper side. Also,
Japanese Utility Model Laid-Open Publication No. 3-98744 discloses a
A shutter opening / closing arm is inserted into the outer periphery of the
And insert the shutter opening / closing arm into the cassette
It is cut and raised at a position away from the holder protrusion, and
One that is almost perpendicular to the length direction of the shutter opening / closing arm
Insert under the stopper that faces the shutter and open the shutter.
The tip of the closed arm was cut and raised on the cassette holder
By restricting the rotation at the front of the guide,
So that the opening / closing arm does not come off from under the stopper.
The shutter opening / closing arm falls upward from the protrusion
This is to prevent that.

[0005]

The object of the invention is to be Solved However, JP-B-63-
Japanese Patent No. 39169 discloses that the structure is simple at first glance.
Although it can be seen, processing is very difficult and lacks realism
I can. That is, in this type of disk drive, generally,
Since the cassette holder is processed by pressing,
The boss is also burred on the cassette holder
It is stamped, but at this time, a small diameter of about 2 mm
Of the small boss
Bending a pair of ribs at a right angle (horizontal shape)
It is extremely difficult in practice. In addition, small diameter of about 2mm
A pair of ribs are formed at the upper end of the diameter shaft by cutting, etc.
To fix the lower end of the shaft on the cassette holder
However, the cutting and crimping process are
Costly. In addition, the shutter opening / closing arm
On the outer circumference of a small diameter through hole with a diameter of about 2 mm to be processed
Pressing a pair of notches is not realistic
There was a problem to say. In addition, 3-98744 No.
The report also appears to be easy to process and assemble at first glance.
Position, but away from the protrusion on the cassette holder
At the position away from the protruding part,
Place it almost perpendicular to the upper part of the shutter opening / closing arm.
The stopper has a shutter opening / closing door
The large part of the movable stroke of the
It is necessary to make the length of the stopper long enough
is there. Therefore, the stopper on the cassette holder
The occupied area increases significantly, and the
Pace factor becomes very bad. Moreover, the cassette
Shutter at the front of the guide section cut and raised on the holder
By restricting the rotation of the opening / closing arm,
So that the opening / closing arm does not come off from under the stopper
Assembly and disassembly of the shutter opening / closing arm
Sometimes the stopper gets in the way. Therefore, its assembly and
At the time of disassembly, open and close the stopper
Against the elasticity so that it escapes out of the mounting position of the
Open to bend over the holder, and
Conversely, it must be bent down and closed back
In reality, the assembly and separation of the shutter opening / closing arm
Solution work is very cumbersome. And this assembly and
During disassembly, repeatedly deflect the stopper upward and downward
Makes the stopper easier to deform by plastic deformation
There was a problem that it was easily damaged and lacked reliability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is an object of the present invention to assemble a shutter opening / closing arm onto a loading member without using a flange additional tightening shaft.
It is an object of the present invention to provide a disk device capable of easily performing structure, processing, assembling, and disassembling operations.

[0007]

Means for Solving the Problems] disc equipment of the present invention for achieving the above object, a loading member for loading the cassette the disc is accommodated from the loading start position to the loading position, on the loading member A shutter opening / closing arm that is rotatably mounted and opens a shutter of a cassette inserted into the loading member at the loading start position, and the shutter opening / closing arm is placed on the loading member without using a flange additional tightening shaft. in the disk apparatus that assemble into, the pivot axis is formed under or on the shutter opening and closing arm loading member, it forms a fulcrum hole fitted to the pivot shaft to the shutter opening and closing arm or loading member, the fulcrum shaft or near the supporting Ten'ana position Delo over <br/> loading member on Is cut and raised, the tip is provided with arm pressing piece directed to supporting point axis or fulcrum hole side, the arm retainer
Creates a gap between the loading member at the bottom of the tip
And the periphery of the fulcrum hole or fulcrum shaft of the shutter opening / closing arm
The distance corresponding to the radius from the fulcrum hole or the fulcrum axis is
Half from the center of the dot hole or fulcrum shaft to the tip of the arm retainer.
Forming a small diameter portion that is smaller than the diameter equivalent distance
The fulcrum hole and the fulcrum shaft are fitted from above
Mounting the shutter opening / closing arm on the loading member
At this time, the above-mentioned peripheral part of the shutter opening / closing arm has a small diameter.
Part to release the arm holding piece.
From the top to the same height as the gap at the bottom of the tip of the
Insert around the shutter opening / closing arm.
The diameter equivalent to the radius from the fulcrum hole or fulcrum axis is small in the part
The large diameter part that is configured to be larger than the radius of the part
Formed adjacent to and mounted on the loading
The shutter opening / closing arm is opened around the fulcrum axis.
The shutter opening / closing arm
The diameter part can be freely rotated into the gap under the tip of the arm holding piece.
It is designed to be inserted horizontally.

[0008]

According to the disk device of the present invention having the above-described structure, the arm holding piece whose tip is directed to the fulcrum shaft or the fulcrum hole at a position near the fulcrum shaft or the fulcrum hole of the loading member is provided. Up and down the arm
Form a gap between the lower end of the holding piece tip and the loading
And the fulcrum hole or fulcrum shaft of the shutter opening / closing arm.
Around the fulcrum hole or the fulcrum axis
From the fulcrum hole or fulcrum axis to the tip of the arm holding piece.
Small diameter part smaller than the distance equivalent to the radius and radius from the small diameter part
Previously formed adjacent a considerable distance is greater large diameter portion, <br/> that Attach the rotatable fulcrum hole and the pivot shaft so as fitted from above the shutter opening and closing arm loading member on In some cases, the above-mentioned peripheral part of the shutter opening / closing arm
It was allowed to escape with respect to the arm pressing piece by the small-diameter portion
Position at the same height as the gap at the bottom of the tip of the arm holding piece
After inserting the shutter opening / closing arm
Turn the shutter around the dot axis in the
Arm holding piece
Into the gap at the bottom of the tip of
As the shutter opening and closing arm does not fall off from the loading member upward, it is obtained by such hold down the large diameter portion of the peripheral portion of the shutter opening and closing arm from above at the tip of the arm pressing piece.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a disk device for recording and reproducing a 3.5-inch floppy disk will be described below with reference to the drawings.

"Overview of Disk Drive" An overview of the disk drive will be described with reference to FIGS.

First, a recording / reproducing disk is used.
A 5-inch floppy disk 1 is housed in a cassette 2. A pair of upper and lower head insertion holes 3a and 3b are formed in upper and lower halves of the cassette 1, and a center core 1a of the floppy disk 1 is loosely fitted in a lower half. A disk table insertion hole 4 is formed. The cassette 1 is provided with a shutter (not shown) for opening and closing a pair of upper and lower head insertion holes 3a and 3b.

Next, the chassis 6 is formed by a horizontal bottom plate 6a and a pair of left and right side plates 6b formed vertically above the bottom plate 6a to form an upward U-shaped cross section. The cassette holder 8, which is a loading member, is formed in a substantially U-shaped cross section with a top plate 8a and a pair of left and right L-shaped cassette insertion guides 8b formed vertically and horizontally below the top plate 8a. . The cassette 2 is inserted into the pair of left and right cassette insertion guides 8b from the direction of arrow a and ejected in the direction of arrow a '. A slide plate 10 as a driving member includes a top plate 10a and a pair of left and right side plates 1 formed vertically below the top plate 10a.
Ob forms a downward U-shaped cross section.

A spindle motor 12 is mounted on the bottom plate 6a of the chassis 6 in the direction of arrow a '.
A horizontal disk table 14 is mounted on the vertical spindle 13. Also, the bottom plate 6 of the chassis 6
The head moving mechanism 16 is mounted on the side of the arrow a in the direction a. The head moving mechanism 16 includes a head carriage 17, a head arm 19 attached thereto via a leaf spring 18, and a pair of upper and lower magnetic recording and reproducing heads attached to the upper and lower opposing surfaces of these heads. The head block includes heads 20a and 20b, a stepping motor 21 and a lead screw 22 for transferring the head block, a guide shaft 23, and the like.

Horizontal guide pins 25a and 25b are formed at the center and both ends in the directions of arrows a and a 'on the left and right sides of the pair of left and right side plates 8b of the cassette holder 8, respectively.
A shutter opening / closing arm 26 also serving as a trigger arm is attached to one side of the top plate 8a in the direction of arrow a.
Then, the cassette holder 8 is removably inserted between the pair of left and right side plates 6b of the chassis 6 and horizontally disposed, and the pair of left and right guide pins 25a at the center is
It is detachably loosely fitted to the vertical guide groove 27 formed on.

A pair of left and right side plates 1 of the slide plate 10
0b is formed with a pair of inclined guide grooves 29 and a pair of horizontal front and rear guide pins 30 at both ends in the directions of arrows a and a '. Then, the slide plate 10 is attached to the cassette holder 8.
It can be detached between a pair of left and right side plates 6b of the chassis 6 so that it can be detachably mounted on the upper surface and both left and right side surfaces of the chassis 6 from above.
The left and right guide pins 30 are removably fitted in a total of four horizontal guide grooves 31 formed in the pair of left and right side plates 6b, and the slide plate 10 is mounted on the chassis. In FIG. 6, it is installed so as to be horizontally movable in the directions of arrows a and a '.

Then, a total of four guide pins 25 b of the cassette holder 8 are loosely fitted in a total of four inclined guide grooves 29 of the slide plate 10. Also, the slide plate 10
The slide plate 10 is urged to move in the direction of arrow a 'with respect to the chassis 6 and the cassette holder 8 by a pair of left and right tension coil springs 32 provided between the top plate 10a and the top plate 8a of the cassette holder 8. The slide plate 10
A locked portion 33 that is locked and unlocked by the trigger arm 26 is formed on one side of the top plate 10a on the side of the arrow a.
Is urged backward in the direction of arrow b '.

Next, an outline of the operation of the disk device will be described.

First, before the loading is started, as shown in FIGS. 9 and 12 (A), the slide plate 10 is moved backward in the direction of arrow a against the tension coil spring 32 and is turned by the torsion coil spring 34. The locked portion 33 is moved by the shutter opening / closing arm 26 moved back in the direction of the arrow b '.
Is locked. Then, the guide pin 25b of the cassette holder 8 is pushed up onto the horizontal step portion 29a at the upper end of the inclined guide groove 29 of the slide plate 10, and the guide pin 25a of the cassette holder 8 moves in the vertical guide groove 27 of the chassis 6. Guided vertically, this cassette holder 8
Are vertically moved in the direction of arrow c 'to the loading start position which is the rising position shown in FIG.

As shown in FIG. 11A, a head arm 19 is moved by a head damping mechanism described later.
Is pushed upward in the direction of arrow d ', which is upward, against the leaf spring 18, and the upper magnetic head 20b is retracted to the retract position above the cassette 2.

Next, at the time of loading, FIG. 9 and FIG.
2A, the cassette 2 is inserted horizontally into the pair of left and right cassette insertion guides 8b of the cassette holder 8 from the direction of arrow a. When the cassette 2 is inserted, the shutter opening / closing arm 26 is rotated against the torsion coil spring 34 in the direction of arrow b in FIG.
The shutter (not shown) is opened.

Then, as shown in FIG. 11A, the floppy disk 1 of the cassette 2 inserted from the direction of arrow a reaches the position just above the spindle 13 and the cassette 2
At the moment when the insertion is completed, as shown in FIG.
The locked portion 33 of the shutter opening / closing arm 26 is unlocked.

At this moment, as shown in FIGS. 10 and 12B, the slide plate 10 is reciprocated in the direction of arrow a 'by the tension coil spring 32. At this time, the guide pin 25b of the cassette holder 8 is pushed down by the inclined guide groove 29 of the slide plate 10 in the downward direction of arrow c, and the guide pin 25a of the cassette holder 8 is lowered.
Is vertically guided in the vertical guide groove 27 of the chassis 6, and the cassette holder 8 is vertically lowered in the direction of arrow c to a loading position which is a lowered position shown in FIG.

Then, as shown in FIG. 11B, the lower magnetic head 20a and the disk table 14 are relatively inserted into the lower head insertion hole 3a and the disk table insertion hole 4 of the cassette holder 8 from below. Then, the center core 1a of the floppy disk 1 is magnetically chucked on the spindle 13 and the disk table 14 in the direction of arrow c, and the lower surface of the floppy disk 1 is brought into contact with the lower magnetic head 20a.

At this time, as shown in FIG. 11B, the head arm 19 is rotated at a low speed in the direction of arrow d by the head damping mechanism described later, and the upper magnetic head 20b is moved to the upper head of the cassette 2. The magnetic head 20b descends at a low speed in the direction of arrow d to the operation position in the insertion hole 3b, and the upper magnetic head 20b comes into contact with the upper surface of the floppy disk 1 by a soft landing operation, thereby completing a series of loading operations.

After the loading is completed, the floppy disk 1 is rotated in the cassette 2 integrally with the spindle 13 of the spindle motor 12 and the disk table 14, and the head moving mechanism 16 moves the pair of upper and lower magnetic heads 20a, 20b. In FIG. 11B, which is the radial direction of the disk 1, scanning is performed in the directions of arrows a and a ', and recording and reproduction of the floppy disk 1 are performed.

The ejecting operation is the reverse operation of the above-described loading operation, and the arrow a 'of the slide plate 10
The eject button 35 formed on one side of the direction side is
Also, in FIG. 11B, the slide plate 10 is pushed in the direction of arrow a to return in the direction of arrow a against the tension coil spring 32. Then, the cassette holder 8 is raised in the direction of arrow c 'to the loading start position in FIG. 12A while the head arm 19 is pushed up in the direction of arrow d' to the retracted position in FIG. The locked portion 33 of the slide plate 10 is locked by the trigger arm 26, and the cassette 2 is ejected from the inside of the cassette holder 8 in the direction of arrow a 'in FIG.

"Description of Head Damping Mechanism" The head damping mechanism 37 will be described with reference to FIGS. 8 to 10, 13 and 14. FIG.

First, a plate-shaped load arm 38 is provided on one side of the head arm 19 on the top plate 8a of the cassette holder 8 in a vertical direction via a pair of fulcrum pins 39 parallel to the directions of arrows a and a '. It is attached so as to be rotatable in the directions of arrows f and f '. A projection 40 horizontally projecting from one side of the head arm 19 abuts on a head supporting portion 38a formed at one end edge of the head arm 19 in parallel with arrows a and a '.

Next, a horizontal load slider 4 is mounted on one side of the load arm 38 on the top plate 8a of the cassette holder 8.
1 is guided by a plurality of guide grooves 42 and guide protrusions 43 and is slidably mounted horizontally in the directions of arrows a and a '. A vertical cam plate 44 is integrally formed on one side of the load slider 41, and the cam plate 4
A cam surface 44a formed on the lower surface of the tip of the tip 4 and inclined in the vertical direction abuts on a cam follower 38b protruding from the other end of the load arm 38. The load arm 38 is formed by the cam 44a and the cam follower 38b.
Is formed.

Then, the road slider 41 is moved to the top plate 8a.
The load 47 is slidably urged in the direction of the arrow a 'by a tension coil spring 46, and a projection 47 formed on one side of the load slider 41 is formed on a part of the slide plate 10. The horizontal stopper 48 abuts at right angles from the direction of arrow a '. The load arm 38 is urged to rotate in the direction of arrow f by a leaf spring 49 mounted on the top plate 8a.

Next, a rotary damper 51 is horizontally mounted on one end of the side plate 6b of the chassis 6 in the direction of arrow a. A rotary shaft 53 projects vertically above a horizontal and flat housing 52 of the rotary damper 51, and a flat pinion 54 is fixed to the outer periphery of the rotary shaft 53.

Next, a rack plate 56 made of a leaf spring is attached to the end of the load slider 41 in the direction of the arrow a, and a rack 57 formed on one side of the tip side of the rack plate 56 is a rotary damper. 51 pinions 54
It is meshed horizontally with the side.

Next, the operation of the head damping mechanism 37 will be described.

First, in the state before the start of loading, as shown in FIG. 13, the load slider 41 is moved backward in the direction of arrow a against the tension coil spring 46 by the stopper 48 of the slide plate 10 via the projection 47 as shown in FIG. I have.
The cam surface 44a of the cam plate 44 is
And the load arm 38 is rotated in the direction of arrow f 'against the leaf spring 49.

Then, the load arm 38 and the load slider 41 are moved by the cassette holder 8 as shown in FIG.
11A, the head arm 19 is moved upward by the head support portion 38a of the load arm 38 via the projection 40 in the direction of the arrow d 'to the position shown in FIG. The upper magnetic head 20b is raised to the retreat position by being raised against the spring 18.

Next, the loading operation is started, and as described above, when the insertion of the cassette 2 into the cassette holder 8 in the direction of arrow a is completed, the slide plate 10 moves forward in the direction of arrow a ', When the holder 8 is lowered in the direction of arrow c from the loading start position in FIG. 12A to the loading position in FIG. 12B, the load arm 38 and the load slider 41 are moved together from the loading start position to the loading position. It is lowered in the direction of arrow c.

At this time, since the cassette holder 8 is quickly lowered in the direction of arrow c from the loading start position to the loading position, the loading operation of the floppy disk 1 onto the spindle 13 and the disk table 14 can be performed quickly. On the other hand, when the cassette holder 8 is lowered from the loading start position to the loading position, a step is formed between the pinion 54 of the rotary damper 51 and the load slider 41. At this time, the lock plate 56 made of a leaf spring is moved downward. To be able to cope with the step.

When the slide plate 10 is moved in the direction of arrow a ', the stopper 48 is moved to the load slider 41.
13 in the direction of arrow a 'in FIG.

Then, as shown in FIG. 14, the load slider 41 is slid in the direction of arrow a 'by the tension coil spring 46, and the rack 57 of the rack plate 56 drives the pinion 54 of the rotary damper 51 to rotate in the direction of arrow g. I do. At this time, the pinion 54 is
, The road slider 41 is slid in the direction of arrow a 'at a low speed.

Accordingly, as shown in FIG. 14, the cam surface 44a of the load slider 41 escapes from the cam follower 38b of the load arm 38 in the direction of the arrow a 'at a low speed. As shown in (B), the load arm 38 is rotated at a low speed in the direction of arrow f by the load of the leaf spring 49 and the head arm 19.

Therefore, the arrow a 'of the road slider 41
The horizontal movement in the direction is converted by the rotation control unit 45 into a rotation movement of the load arm 38 in the direction of arrow f, and the rotation of the head arm 19 is controlled at a low speed in the direction of arrow f.

Then, the head arm 19 supported on the head support portion 38a of the load arm 38 via the projection 40 is lowered at a low speed in the direction of arrow d as shown in FIG. The magnetic head 20b is lowered at a low speed in the direction indicated by the arrow d from the retracted position shown in FIG. 11A to the operating position shown in FIG. 11B, and the upper magnetic head 20a is softly placed on the upper surface of the floppy disk 1. Landed.

That is, the rotational speed of the upper magnetic head 20a in the direction of arrow d is damped by the rotary damper 51. And in the loading completed state,
As shown in FIG.
Then, the slide plate 10 is brought into contact with the stopper 48 of the slide plate 10 from the direction of the arrow a 'and stopped.

During the ejecting operation, the above-described loading operation is performed in reverse, and the stopper 48 is moved backward in the direction of the arrow a to move the stopper 48 to the projection 47.
The load slider 41 is pulled through the coil spring 46
13 in the direction of arrow a as shown in FIG.

At this time, the rack 57 of the rack plate 56 moves the pinion 54 of the rotary damper 51 in the direction of arrow g 'in FIG.
The rotation of the rotary damper 51 becomes free with respect to the rotation in the direction of the arrow g ′.
The load slider 41 is moved by an arrow a by the slide plate 10.
Return smoothly in the direction.

As shown in FIGS. 1 and 12A, the cam surface 44a of the load slider 41 rides on the cam follower 38b of the load arm 38 again in the direction of the arrow a. It is smoothly rotated in the direction of arrow f 'against the spring 49.

On the other hand, when the slide plate 10 is moved backward in the direction of arrow a, the loading position shown in FIG.
(A), the load arm 3 is raised by the cassette holder 8 which is raised in the direction of arrow c 'to the loading start position.
8 and the road slider 41 are raised together in the direction of arrow c '.

Accordingly, the load arm 38 smoothly rotates in the direction of arrow f 'while being lifted in the direction of arrow c' from the loading position to the loading start position. Then, the head arm 19 is moved from the operation position shown in FIG.
1 is pushed up in the direction of arrow d 'against the leaf spring 18 against the retracted position shown in FIG. 1 to smoothly raise the upper magnetic head 20a to the retracted position.

"Description of Assembly Structure of Shutter Opening / Closing Arm" An assembly device 59 for the shutter opening / closing arm 26 which also serves as a trigger arm will be described with reference to FIGS.

First, the shutter opening / closing arm 26, which also serves as a trigger arm, is formed by pressing a sheet metal, and has a fulcrum hole 63 formed therein. The fulcrum hole or the fulcrum hole corresponding to the peripheral portion of the fulcrum shaft according to the present invention. A linear arm 61 and a sector arm 6 integrally formed on both sides of the peripheral portion 60
2 form a substantially L-shape as a whole. The outer periphery of the fulcrum hole peripheral portion 60 is formed in the large diameter portion 60a.
The large diameter portion 60 a has a radius from the fulcrum hole 63.
The equivalent distance R1 is configured to be large. And that big
The end of the diameter portion 60a in the direction of the arrow b which is the shutter opening direction.
In the section, there is an escape slot for the arm holding piece 72 described later.
Small-diameter portion 6 cut into the fulcrum hole 63 by the slot 64
0b is formed, and the small diameter portion 60b is
The distance R2 equivalent to the radius is the distance equivalent to the radius of the large diameter portion 60a.
It is configured to be smaller than R1. And the straight arm 6
A shutter engaging piece 65 also serving as a guided piece is vertically cut down from one side surface of the tip side of the shutter engaging piece 65, and a shutter engaging portion 66 curled to the tip of the shutter engaging piece 65.
Are formed. Further, a stopper piece 67 is vertically cut and raised upward from the other side surface of the intermediate portion of the linear arm 61,
At the tip of the stopper piece 67, a spring locking portion 68 bent substantially in a V-shape is formed. The straight arm 6
A small convex portion 69 is bulged on the lower surface of the tip of 1.

Next, the cassette holder 8, which is a loading member, is formed by pressing a sheet metal.
A fulcrum shaft 71 formed by burring is integrally formed on an upper portion of one side of the top plate 8a in the direction of the arrow a, and an arm pressing piece 72 is vertically provided on the top plate 8a near the fulcrum shaft 71. It has been cut and raised. In addition, this arm holding piece 72
Is formed radially toward the center of the fulcrum shaft 71, and a gap 73 corresponding to the thickness of the shutter opening / closing arm 26 is formed between the lower surface of the tip of the arm pressing piece 72 and the upper surface of the top plate 8a. Have been. Further, the top plate 8a is formed with an arc-shaped long hole 74 for guiding the narrow base portion 65a of the shirt engagement piece 65 of the shutter opening / closing arm 26. Further, the fulcrum shaft 7 is sandwiched between the arc-shaped long holes 74 of the top plate 8a.
Spring engaging pieces 75a and 75b are cut and raised at the upper portion on the side opposite to 1. And, from the fulcrum shaft 71, the arm holding piece
The radius equivalent distance R3 to the tip of 72 is the shutter opening / closing
It is formed around the fulcrum hole peripheral portion 60 of the arm 26.
The distance R1 equivalent to the radius of the large diameter portion 60a and the small diameter portion 60b
R2 <R3 <R1 with respect to the radius equivalent distance R2.
Have been.

Next, the slide plate 10 as a driving member is formed by pressing a sheet metal.
a shutter opening / closing arm 2 on one side of arrow a
A horizontal stopper 77 is formed integrally on the upper part of one side of the rotation range 6. One side surface of the stopper portion 77 is formed on a stopper surface 78 that receives the stopper piece 67 of the shutter opening / closing arm 26. Further, the locked portion 33 is vertically cut down from the end of the stopper portion 77 in the direction of arrow a, and a small convex portion 79 is bulged on the lower surface of the stopper portion 77 at a position near the locked portion 33. I have.

Next, the order of assembling the shutter opening / closing arm 26 will be described.

First, in FIG. 2 and FIG. 5A, the shutter engaging piece 65 of the shutter opening / closing arm 26 is inserted obliquely from above into the arc-shaped long hole 74 of the top plate 8a of the cassette holder 8, and is inserted downward. After passing through, as shown in FIGS. 2 and 5 (A) and (B), the shutter opening / closing arm 26
The fulcrum hole 63 is fitted to the fulcrum shaft 71 of the cassette holder 8 from above, and the shutter opening / closing arm 26 is placed horizontally on the top plate 8a.

At this time, the peripheral portion 60 around the fulcrum hole of the shutter opening / closing arm 26 is formed by the small diameter portion 60 b and the slit 64.
Its earth as escape with respect to the arm pressing piece 72 Te
To the same height as the gap 73 below the tip of the
Insert from above with. Then, as shown in FIG. 5A, the small convex portion 69 of the linear arm 61 is brought into contact with the top plate 8a, and the shutter engaging piece 65 sandwiches the top plate 8a from below. The base 65 is loosely fitted in the arc-shaped long hole 74.

Next, as shown in (B) of FIG. 3 and FIG. 5, the shutter opening and closing arm 26 about the pivot axis 71
By rotating the slit 64 in the direction of arrow b which is one side of the arm holding piece 72 by rotating in the direction of arrow b which is the shutter opening direction , the large-diameter portion 6 of the fulcrum hole peripheral portion 60
0a is rotatably and horizontally inserted (inserted) into a gap 73 between the tip of the arm pressing piece 72 and the cassette holder 8, and the shutter opening / closing arm 26 rises above the cassette holder 8 to release the shutter. The arm holding piece 72 prevents the opening / closing arm 26 from dropping upward from the fulcrum shaft 71. At this point, since the stopper 77 for restricting the rotation of the shutter opening / closing arm 26 in the direction of the arrow b 'has not been mounted on the cassette holder 8 yet, the stopper 77 does not interfere with the stopper at all. The shutter opening / closing arm 26 can be easily assembled and disassembled on the cassette holder 8.

Next, as shown in FIGS. 9, 10 and 12, the cassette holder 8 and the slide plate 10 are assembled to the chassis 6 as described above, and the cassette holder 8 and the slide plate 10 are assembled as shown in FIGS.
As shown in (B), the stopper 7 of the slide plate 10
7 is mounted on the top of the top plate 8a of the cassette holder 8 so as to be detachably mounted horizontally. At this time, the fulcrum shaft 71 of the fulcrum hole peripheral portion 60 is sandwiched between the small convex portions 79 of the stopper portion 77.
The side opposite to the arm pressing piece 72 is pressed from above.

Next, as shown in FIG. 3, the coil portion 34a of the torsion coil spring 34, which is the rotation urging means of the shutter opening / closing arm 26, is connected to the spring retaining piece 75 of the cassette holder 8.
a, and both ends 34b, 34c of the shutter opening / closing arm 2 are locked by the spring locking portion 68 of the shutter opening / closing arm 26 and the spring locking piece 75b of the cassette holder 8.
6 is urged by the torsion coil spring 34 to rotate about the fulcrum shaft 71 in the direction of the arrow b 'which is the shutter closing direction ,
The assembly of the shutter opening / closing arm 26 on the cassette holder 8 is completed by abutting the stopper piece 67 of the shutter opening / closing arm 26 against the stopper surface 78 of the stopper portion 77 of the slide plate 10 from the direction of arrow b 'and stopping. .

When the assembly of the shutter opening / closing arm 26 is completed, as shown in FIG. 3, the stopper portion 77 regulates the reversing position of the shutter opening / closing arm 26 in the direction of the arrow b ', and the small diameter portion 60b and the slit 6
Position where 4 overlaps with arm holding piece 72 (position shown in FIG. 2)
The shutter opening / closing arm 26 has a large diameter 60 around the fulcrum hole.
The portion 60a cannot be removed above the arm pressing piece 72, and it is possible to prevent the shutter opening / closing arm 26 from accidentally dropping from the cassette holder 8. At this time, the tip of the arm holding portion 72 is a linear arm 6 having a large movable stroke of the shutter opening / closing arm 26.
Since the fulcrum hole peripheral portion 60 having the smallest movable stroke is pressed from above instead of the one portion, the length of the arm pressing piece 72 can be made sufficiently small, and the space factor on the cassette holder 8 is significantly reduced. Can be improved.

When the shutter opening / closing arm 26 is disassembled from above the cassette holder 8, the reverse operation of the above-described assembling operation may be performed.

Next, the operation of the shutter opening / closing arm 26 assembled as described above will be described.

First, before starting the loading, the cassette holder 8 is raised in the direction of arrow c 'to the loading position shown in FIG. 12A, and the top plate 8a is moved to the lower surface of the top plate 10a of the slide plate 10. Have been close to. Then, the shutter opening / closing arm 26 is moved back in the direction of the arrow b 'by the torsion coil spring 34 to the home position shown in FIG. 3, and the stopper piece 67 comes into contact with the stopper surface 78 of the slide plate 10 and stops.

At this time, the locked portion 33 of the slide plate 15, which has been moved back in the direction of arrow a to the return position shown in FIG. 9 and is urged to move in the direction of arrow a ′ by the pair of tension coil springs 32, As shown in FIG. 3, the shutter opening / closing arm 26 is locked by being brought into contact with the arc-shaped outer peripheral surface 62 a centering on the fulcrum shaft 71 of the sector arm 62 from the direction of the arrow a ′.

Therefore, when the cassette 2 is inserted horizontally into the cassette holder 8 from the direction of the arrow a as shown in FIG. 9 during loading, the shutter engaging portion 66 of the shutter opening / closing arm 26 is moved as shown in FIG. The front end face 2a of the cassette 2 is in contact with a corner portion of one side face 81a of a shutter 81 slidably mounted in the directions of arrows k and k 'along the front end face 2a.

When the cassette 2 is continuously pushed in the direction of arrow a, the shutter opening / closing arm 26 is pushed in the direction of arrow a by the front end face 2a of the cassette 2 as shown in FIG. The shutter 81 is rotated in the direction b, and the shutter engaging portion 65 of the shutter opening / closing arm 26 pushes the shutter 81 open in the direction of arrow k against a built-in spring (not shown). A pair of upper and lower head insertion holes 3 of the cassette 2
The shutter 81 is opened so as to overlap with a and 3b. The cassette 2 is a top plate 8 of the cassette holder 8.
The cartridge stopper 83 is stopped by being brought into contact with the cassette stopper 83 cut down downward from the end in the direction of arrow a in FIG.

When the shutter 81 is opened and the shutter opening / closing arm 26 moves forward in the direction of arrow b to the forward movement position as shown in FIG. 4, the fan-shaped arm 62 of the shutter opening / closing arm 26 slides. The slide 10 is released from the locked portion 33 of the plate 10 in the direction of the arrow b, and the lock of the slide plate 10 at the return position is released. (This unlocking operation is a mechanical trigger operation on the slide plate 10).

Then, at that moment, as described above, the slide plate 10 is moved from the return position shown in FIG.
The cassette holder 8 is moved forward in the direction of arrow a 'to the forward movement position shown in FIG. 2B, and the cassette holder 8 is moved in the direction of arrow c from the loading start position shown in FIG. 12A to the loading position shown in FIG. And the loading operation of the floppy disk 1 is performed.

At this time, the locked portion 33 of the slide plate 10 enters the direction of the arrow a 'into one side surface 62b of the sector arm 62 of the shutter opening / closing arm 26. When the shutter opening / closing arm 26 is lowered together with the cassette holder 8 to the loading position shown in FIG. 12B in the direction of the arrow c, one side surface 62 b of the sector arm 62 becomes one side surface 33 a of the locked portion 33. It is lowered while abutting on. Accordingly, the shutter opening / closing arm 26 is lowered together with the cassette holder 8 in the direction of arrow c while being locked by the locked portion 33 at the forward movement position shown in FIG.
The shutter 81 is locked in the open state, and the loading operation of the floppy disk 1 is performed.

The ejecting operation is the reverse of the above-described loading operation. When the ejecting button 35 is pressed, the slide plate 10 moves in the direction of arrow a from the forward movement position in FIG. 4 to the backward movement position in FIG. When it is moved, one side surface 33a of the locked portion 33 is rotated by the fan-shaped arm 6 of the shutter opening / closing arm 26.
2, the shutter opening / closing arm 26 is unlocked at the forward movement position.

Then, the shutter opening / closing arm 26 is moved back in the direction of arrow b 'by the torsion coil spring 34 to the home position shown in FIG. 3, and as shown in FIG.
1 is closed in the direction of arrow k ′ by a built-in spring, and the shutter engaging portion 66 of the shutter opening / closing arm 26 is closed.
Pushes the front end face 2a of the cassette 2 in the direction of the arrow a ', so that the cassette 2 is ejected from the inside of the cassette holder 8 in the direction of the arrow a', as shown in FIG.

When the user releases the finger pressing the eject button 35, the slide plate 10 is urged to move in the direction of arrow a 'by a pair of tension coil springs 32, as shown in FIG. The slide plate 10 is brought into contact with the outer peripheral surface 62a of the sector arm 62 of the opening / closing arm 26 from the direction of the arrow a ', and is locked at the return position in the direction of the arrow a.

As described above, one embodiment of the present invention has been described.
The present invention is not limited to the embodiments described above, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, in the assembling apparatus of the shutter opening / closing arm, the fulcrum shaft 71 is connected to the top plate 8 of the cassette holder 8.
a, and a fulcrum hole 63 is formed in the shutter opening / closing arm 26. Conversely, a fulcrum shaft 71 is burred on the lower surface of the shutter opening / closing arm 26, and the fulcrum hole 63 is formed on the top plate 8a of the cassette holder 8. May be formed. Further, the present invention is not limited to disk devices for floppy disks, but is applicable to various disk devices for recording and reproducing various disks.

[0073]

The disk device of the present invention configured as described above has the following effects.

A loading member for loading a cassette containing a disc from a loading start position to a loading position, and a shutter of a cassette rotatably mounted on the loading member and inserted into the loading member at the loading start position. And a shutter opening / closing arm for opening the cover, and the shutter opening / closing arm is assembled on the loading member without using a flange additional tightening shaft, in a position near the fulcrum shaft or the fulcrum hole of the loading member. on the loading member, by cutting and raising the arm pressing piece whose tip is directed to the fulcrum shaft or fulcrum hole, the arm
Form a gap between the lower end of the holding piece tip and the loading
And the fulcrum hole or fulcrum shaft of the shutter opening / closing arm.
Around the fulcrum hole or the fulcrum axis
From the fulcrum hole or fulcrum axis to the tip of the arm holding piece.
Small diameter part smaller than the distance equivalent to the radius and radius from the small diameter part
Previously formed adjacent a considerable distance is greater large diameter portion, <br/> that Attach the rotatable fulcrum hole and the pivot shaft so as fitted from above the shutter opening and closing arm loading member on In some cases, the above-mentioned peripheral part of the shutter opening / closing arm
It was allowed to escape with respect to the arm pressing piece by the small-diameter portion
Up to the same height as the gap below the arm holding piece
After inserting the shutter opening / closing arm,
-Turn the shutter opening / closing arm
Rotate the large diameter part in the peripheral part into the gap under the arm holding piece
A large diameter of the above-mentioned peripheral portion of the shutter opening / closing arm at the tip of the arm holding piece so that the shutter opening / closing arm can be freely inserted horizontally to prevent the shutter opening / closing arm from dropping upward from the loading member.
The part is pressed down from above. Therefore,
The fulcrum shaft and the fulcrum hole having a small diameter of about 2 mm formed in the loading member and the shutter opening / closing arm need not have any pair of ribs or notches as seen in JP-A-63-39169. Besides, the structure is very simple, and these small-diameter fulcrum shafts and fulcrum holes can be easily formed into a loading member and a shutter opening / closing arm by burring or pressing. Also,
A fulcrum hole of a shutter opening / closing arm rotatably mounted on the loading member, wherein a tip of an arm pressing piece cut and raised on the loading member near the fulcrum shaft or the fulcrum hole is directed to the fulcrum shaft or the fulcrum hole. Alternatively, the assembly of the shutter opening / closing arm can be completed only by inserting the large diameter portion of the peripheral portion of the fulcrum shaft into the gap between the tip of the arm pressing piece and the loading member, and the assembly of the shutter opening / closing arm can be completed. In addition, the arm pressing piece does not obstruct the disassembly at all. Therefore, 3-987
As disclosed in Japanese Patent No. 44, the stopper on the cassette holder, which is an obstacle to assembling and disassembling the shutter opening / closing arm, is opened so as to be flexed upward against elasticity so as to escape from the installation position of the shutter opening / closing arm. Conversely, it is not necessary to perform any bending operation of the arm holding piece, as in the case of closing downward so that it is bent downward and the shutter opening / closing arm can be very easily assembled and disassembled. Breakage due to plastic deformation of the piece does not occur at all, and high reliability can be ensured. Also, since the arm holding piece is cut and raised at a position near the fulcrum shaft or the fulcrum hole, and the tip of the arm holding piece is directed toward the fulcrum shaft or the fulcrum hole, the arm holding piece is moved by the movable stroke of the shutter opening and closing arm. The smallest part of can be held down. Therefore, the length of the arm pressing piece can be significantly reduced as compared with the stopper disclosed in Japanese Utility Model Laid-Open Publication No. 3-98744, and the area occupied by the arm pressing piece on the loading member can be significantly reduced. Factor improves. As described above, according to the present invention, the structure of the shutter opening / closing arm assembled on the loading member without using the flange additional tightening shaft can be simplified in structure, processing, assembly, and disassembly. There is an effect that the space factor on the loading member can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a shutter opening / closing arm assembling apparatus of a disk device according to an embodiment of the present invention.

FIGS. 2A and 2B are a plan view and an enlarged plan view of a main part for explaining an assembling operation of the shutter opening / closing arm assembling apparatus.

FIG. 3 is a plan view showing the completion of assembly of the shutter opening / closing arm assembling apparatus.

FIG. 4 is a plan view illustrating a mechanical trigger operation of a shutter opening / closing arm.

5A is a cross-sectional side view taken along the line AA of FIG. 3, and FIG. 5B is a cross-sectional side view taken along the line BB of FIG.

FIG. 6 is a plan view illustrating a closed state of a shutter opening / closing operation of the cassette.

FIG. 7 is a plan view for explaining a state in which a lid is opened in a shutter opening / closing operation of the cassette.

FIG. 8 is an exploded perspective view of the entire disk device.

FIG. 9 is a plan view of the entire disk device before starting disk loading.

FIG. 10 is a plan view of the entire disc device after disc loading.

11A is a cross-sectional side view taken along the line CC of FIG. 9, and FIG. 11B is a cross-sectional side view taken along the line DD of FIG.

12A is a side view taken along the line EE of FIG. 9, and FIG. 12B is a side view taken along the line FF of FIG.

FIG. 13 is a perspective view showing a state before starting damping of a head damping mechanism of the disk device.

FIG. 14 is a perspective view of the head damping mechanism of the disk device at the end of damping.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Floppy disk (disk) 2 Cassette 8 Cassette holder (loading member) 26 Shutter opening / closing arm 59 Shutter opening / closing arm assembling device 60 Around fulcrum hole (peripheral portion) 60a Large diameter portion around fulcrum 60b Small diameter portion 63 around fulcrum 63 Support hole 71 Support shaft 72 Arm holding piece 73 Clearance 78 Distance equivalent to radius of stopper part R1 large diameter part R2 Distance equivalent to radius of small diameter part R3 Distance equivalent to radius of tip of arm pressing piece

Claims (1)

(57) [Claims] A loading member for loading a cassette containing a disc from a loading start position to a loading position; a loading member rotatably mounted on the loading member, and inserted into the loading member at the loading start position. A disc opening / closing arm for opening a shutter of a cassette, wherein the shutter opening / closing arm is assembled on the loading member without using a flange additional tightening shaft; A fulcrum shaft formed below the arm, a fulcrum hole formed in the shutter opening / closing arm or the loading member, and fitted to the fulcrum shaft, and a fulcrum shaft on the loading member at a position near the fulcrum shaft or the fulcrum hole. Cut and raised at the tip An arm pressing piece directed to the fulcrum shaft or fulcrum hole side, a gap formed between the loading member at the bottom of the tip of the arm pressing piece, the pivot hole or pivot axis of the shutter opening and closing arm Week
A small diameter portion formed on the side, and
The distance equivalent to the radius from the point axis is above the fulcrum hole or the fulcrum axis.
Smaller than the radius equivalent distance to the tip of the arm holding piece.
The fulcrum hole and the fulcrum shaft are fitted from above.
The shutter opening / closing arm
When installing the shutter on the
Release the peripheral part of the arm against the arm retainer.
The same as the gap above the lower end of the arm holding piece.
A small-diameter portion to be inserted from above into the same height position, and the small-diameter portion in the peripheral portion of the shutter opening / closing arm.
A large diameter portion formed adjacent to the fulcrum hole or
The distance equivalent to the radius from the fulcrum shaft is larger than the above small diameter part
And mounted on the loading member
Shut the shutter opening / closing arm around the fulcrum shaft.
The arm holding piece is rotated by rotating
Is inserted horizontally into the gap at the bottom of the tip
A large diameter portion .