JPH05258442A - Arm assembly device for opening and closing shutter of disk device - Google Patents

Abstract

PURPOSE:To enable the easy assembly of a shutter opening/closing arm in common use as a trigger arm on a cassette holder without using a tightening shaft with a flange. CONSTITUTION:A slit 64 formed on the outer periphery of the disk part 60 of the shutter opening/closing arm 26 is inserted down to the lower position of a hook part 72 formed on a top plate 8a at the time of fitting a fulcrum hole 63 formed on the shutter opening/closing arm 26 in common use as the trigger arm onto the fulcrum shaft 71 of the top plate 8a of a cassette holder 8 from above this shaft. The shutter opening/closing arm 26 is then rotated to one side around the fulcrum shaft 71 to deviate the slit 64 to one side with respect to the hook part 72, by which the outer periphery 60a of the disk part 60 is slid into the lower position of the hook part 72. The sliding plate 10 is then assembled to the cassette 8 and the backward and forth moving position of the shutter opening/closing arm 26 is regulated by the stopper part 77 of the sliding plate 10, by which the arm is so assembled as to prevent the slit 64 from returning to the position overlapping on the hook part 72.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for assembling a shutter opening / closing arm which also serves as a trigger arm and is suitable for application to a disk device for recording / reproducing a 3.5-inch floppy disk.

[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 containing a floppy disk is inserted into a cassette holder which is a loading member, it is placed on the cassette holder. The shutter opening / closing arm that also functions as a trigger arm is rotatably attached to open the shutter of the cassette, and when the insertion of the cassette is completed, the slide plate that is the driving member is unlocked at the return position,
By moving this 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 this slurado plate, and the floppy disk in the cassette is loaded onto the spindle and disk table. The one configured to do is considered.

[0003] 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 forming a fulcrum shaft is inserted into the shutter opening / closing arm and the cassette holder, and the flange additional tightening is performed. The lower end of the shaft was fixed to the cassette holder by caulking.

[0004]

However, in the case where the shutter opening / closing arm also serving as the trigger arm is assembled on the cassette holder by the conventional method of crimping the flange-added clamping shaft, the number of parts, the number of machining steps, and the number of assembly steps are reduced. However, there is a problem in that a caulking jig is required, an assembling work takes time, and the cost of the Costa becomes high.

Further, as in the conventional method, in which the flange-added tightening shaft is swaged to the cassette holder, there is a problem that the shutter opening / closing arm cannot be disassembled from the cassette holder for repair.

The present invention has been made to solve the above problems, and a shutter opening / closing arm also serving as a trigger arm can be easily assembled on a cassette holder without using a flange-added tightening shaft. It is an object of the present invention to provide a shutter opening / closing arm assembling device for such a disk device.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, a shutter opening / closing arm assembling apparatus for a disk device according to the present invention comprises a loading member for loading a cassette containing a disk from a loading start position to a loading position. A drive member for driving the loading member from the loading start position to the loading position by moving from the backward movement position to the forward movement position, and rotatably mounted on the loading member and inserted into the loading member at the loading start position. The trigger arm is also used to open the shutter of the cassette and release the lock of the driving member at the backward movement position when the insertion of the cassette is completed to move the driving member from the backward movement position to the forward movement position. In the disk device with the shutter opening and closing arm And a fulcrum shaft formed on the loading member or the shutter opening / closing arm, a fulcrum hole formed on the shutter opening / closing arm or the loading member and fitted to the fulcrum shaft, and the fulcrum of the shutter opening / closing arm. A slit formed on the outer periphery of a disk portion having a hole or a fulcrum shaft formed thereon and the slit formed on the loading member, and the slit of the shirt opening / closing arm when the fulcrum hole and the fulcrum shaft are fitted from above. And a stopper portion that is formed integrally with the drive member and that regulates the backward movement position of the shutter opening / closing arm so that the slit does not return to the position where the slit overlaps the hook portion. is there.

[0008]

In the shutter opening / closing arm assembling apparatus for the disk device of the present invention constructed as described above, when the shutter opening / closing arm also serving as the trigger arm is assembled on the loading member, these fulcrum holes are fitted to the fulcrum shaft from above. When making it, insert the slit to the lower position of the hook. next,
Rotate the shutter opening / closing arm to one side around the fulcrum axis to displace the slit to one side with respect to the hook part, so that the disk part of the shutter opening / closing arm enters the lower position of the hook part. Then, the disk portion of the shutter opening / closing arm is pressed from above by the hook portion. Next, when the drive member is assembled to the cassette holder and the stopper position regulates the backward movement position of the shutter opening / closing arm, the slit does not return to the position where it overlaps with the hook portion, and the shutter opening / closing arm does not come off from the loading member. Assembly of the arm is completed. Therefore, the shutter opening / closing arm that also serves as the trigger arm can be easily assembled on the cassette holder without using the flange-added tightening shaft.

[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.

[0010]

[Outline of Disk Device] An outline of the disk device will be described with reference to FIGS.

First, there is a disc for recording and reproduction.
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 the upper and lower halves of the cassette 1, and a center core 1a of the floppy disk 1 is loosely fitted in the lower half. The disc table insertion hole 4 is formed. A shutter (not shown) that opens and closes the pair of upper and lower head insertion holes 3a and 3b is attached to the cassette 1.

Next, the chassis 6 is formed by a horizontal bottom plate 6a and a pair of left and right side plates 6b vertically formed on the upper part of the bottom plate 6a so that the cross-sectional shape is an upward U-shape. The cassette holder 8, which is a loading member, is formed by a top plate 8a and a pair of left and right L-shaped cassette insertion guides 8b, which are vertically and horizontally formed in the lower portion thereof, and has a substantially U-shaped cross section. .. 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 '. The slide plate 10, which is a driving member, includes a top plate 10a and a pair of left and right side plates 1 vertically formed on the lower part thereof.
And 0b, the cross-sectional shape is formed in a downward U shape.

A spindle motor 12 is attached to the bottom plate 6a of the chassis 6 on the arrow a'direction side.
A horizontal disk table 14 is attached to the vertical spindle 13. In addition, the bottom plate 6 of the chassis 6
A head moving mechanism 16 is attached to the arrow a in the direction of arrow a. The head moving mechanism 16 includes a head carriage 17, a head arm 19 attached to the head carriage 17 through a leaf spring 18, and a pair of upper and lower magnetic heads, which are heads for recording and reproducing, which are attached to upper and lower opposite surfaces of these heads. It is configured by a head block including the heads 20a and 20b, a stepping motor 21 and a lead screw 22 that move the head block, a guide shaft 23, and the like.

Further, 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 side surfaces of the pair of left and right side plates 8b of the cassette holder 8,
A shutter opening / closing arm 26 also serving as a trigger arm is attached to one side of the top plate 8a on the arrow a direction side.
The cassette holder 8 is horizontally arranged between the pair of left and right side plates 6b of the chassis 6, and the center pair of left and right guide pins 25a is loosely fitted in the vertical guide groove 27 formed in the pair of left and right side plates 6b. ..

A pair of left and right side plates 1 of the slide plate 10 is also provided.
0b is provided with a pair of inclined guide grooves 29 and a pair of horizontal front and rear guide pins 30 on both ends in the directions of arrows a and a '. And the slide plate 10 is the cassette holder 8
Are horizontally arranged between the pair of left and right side plates 6b of the chassis 6 so as to cover the upper surface and the left and right side surfaces of the chassis 6, and a total of four horizontal guide grooves are formed on the pair of left and right side plates 6b. The slide plate 10 is loosely fitted in the frame 31 and is movably installed horizontally in the chassis 6 in the directions of arrows a and a '.

A total of four guide pins 25b 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 arrow a'direction with respect to the chassis 6 and the cassette holder 8 by a pair of left and right tension coil springs 32 installed between the top plates 10a of the cassette holder 8 and 8a. The slide plate 10
A lockable portion 33 that is locked and unlocked by the trigger arm 26 is formed on one side of the top plate 10a on the arrow a direction side.
It is urged back in the direction of arrow b '.

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

First, in the state before the start of loading, as shown in FIG. 9 and FIG. 12A, the slide plate 10 is returned in the direction of arrow a against the tension coil spring 32, and the spring 34 causes the arrow to move. The locked portion 33 is locked by the shutter opening / closing arm 26 that is moved back in the b'direction. And the guide pin 2 of the cassette holder 8
5b is pushed up onto the horizontal step portion 29a at the upper end of the inclined guide groove 29 of the slide plate 10, the guide pin 25a of the cassette holder 8 is vertically guided in the vertical guide groove 27 of the chassis 6, and this cassette The holder 8 is vertically lifted in the direction of arrow c'to the loading start position which is the lift position shown in FIG.

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

Next, at the time of loading, FIG. 9 and FIG.
2 (A), the cassette 2 is horizontally inserted 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 the arrow a reaches the position directly 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.

Then, at that moment, as shown in FIGS. 10 and 12B, the slide plate 10 is moved forward by the tension coil spring 32 in the arrow a'direction. 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 pulled down.
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 the loading position which is the lowering position shown in FIG.

Then, as shown in FIG. 11B, the lower magnetic head 20a and the disk table 14 are relatively inserted from below into the lower head insertion hole 3a and the disk table insertion hole 4 of the cassette holder 8. 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, the head arm 19 is rotated at a low speed in the direction of arrow d by the head damping mechanism described later, as shown in FIG. 11B, and the upper magnetic head 20b is moved to the upper head of the cassette 2. The upper magnetic head 20b is brought into contact with the upper surface of the floppy disk 1 by a soft landing operation at a low speed in the direction of the arrow d to the operating position in the insertion hole 3b, and a series of loading operations is completed.

After the loading is completed, the floppy disk 1 is rotationally driven 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 drives the pair of upper and lower magnetic heads 20a and 20b into a floppy disk. 11B, which is the radial direction of the disk 1, is scanned in the directions of arrows a and a'in FIG. 11B, and recording and reproduction of the floppy disk 1 are performed.

The eject operation is the reverse operation of the loading operation described above, and is indicated by the arrow a'of the slide plate 10.
The eject button 35 formed on one side of the direction side is shown in FIG.
11B, the slide plate 10 is pushed back in the direction of the arrow a against the tension coil spring 32 by pushing in the direction of the arrow a. Then, after the head arm 19 is pushed up in the direction of arrow d'to the retracted position of FIG. 11A, the cassette holder 8 is raised in the direction of arrow c'to the loading start 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 by the shutter opening / closing arm 26 in the arrow a'direction in FIG.

[0027]

[Description of Head Damping Mechanism] FIGS. 8 to 10 and 13
The head damping mechanism 37 will be described with reference to FIGS.

First, on the top plate 8a of the cassette holder 8, a plate-shaped load arm 38 is provided on one side of the head arm 19 in the vertical direction via a pair of fulcrum pins 39 parallel to the directions of arrows a and a '. It is attached rotatably in the directions of arrows f and f '. A protrusion 40 horizontally projected from one side surface of the head arm 19 is in contact with a head support portion 38a formed at one end of the head arm 19 in parallel with the arrows a and a '.

Next, on the top plate 8a of the cassette holder 8, one side of the load arm 38 is provided with a horizontal load slider 4a.
1 is guided by a plurality of guide grooves 42 and guide protrusions 43, and is horizontally slidably mounted in the directions of arrows a and a '. A vertical cam plate 44 is integrally formed on one side of the load slider 41.
A cam surface 44a formed on the lower surface of the tip of the No. 4 and inclined in the up-down direction is in contact with a cam follower piece 38b protruding from the other end of the load arm 38. The cam 44a and the cam driven piece 38b are used to load the load arm 38.
The rotation control unit 45 is formed.

The load slider 41 is attached to the top plate 8a.
And a protrusion 47 vertically formed on one side of the load slider 41 is formed on a part of the slide plate 10 by a tension coil spring 46 slidably urged in the direction of arrow a '. The horizontal stopper 48 is abutted at a right angle from the arrow a'direction. Further, the load arm 38 is rotationally biased in the direction of arrow f by a leaf spring 49 mounted on the top plate 8a.

Next, a rotary damper 51 is horizontally attached to one end of the side plate 6b of the chassis 6 on the arrow a direction side. A rotary shaft 53 is vertically projected on a horizontal and flat housing 52 of the rotary damper 51, and a flat pinion 54 is fixed to the outer circumference 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 on the arrow a direction side, and a rack 57 formed on one side surface of the rack plate 56 on the tip side is a rotary damper. 51 pinion 54
It is horizontally engaged with the side of the.

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 stopper 48 of the slide plate 10 causes the load slider 41 to move back in the direction of arrow a against the tension coil spring 46 via the protrusion 47. There is.
The cam surface 44 a of the cam plate 44 is attached to the load arm 38.
It completely rides on the cam driven piece 38b, and the load arm 38 is rotated in the direction of the arrow f ′ against the leaf spring 49.

The load arm 38 and the load slider 41 are moved by the cassette holder 8 as shown in FIG.
11A to the loading start position shown in FIG. 11, and the head supporting portion 38a of the load arm 38 causes the head arm 19 to plate in the direction of arrow d'to the position shown in FIG. The upper magnetic head 20b is lifted up against the spring 18 to the retracted position.

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 is moved in the direction of arrow a ', and the cassette is moved. When the holder 8 is lowered in the direction of arrow c from the loading start position of FIG. 12A to the loading position of FIG. 12B, the load arm 38 and the load slider 41 together move from the loading start position to the loading position. It is lowered in the direction of arrow c.

At this time, the cassette holder 8 is quickly lowered from the loading start position to the loading position in the direction of arrow c, so that 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, since 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, but at this time, the lock plate 56 composed of a leaf spring is lowered. It is possible to deal with the above-mentioned step by bending.

When the slide plate 10 is moved forward in the direction of arrow a ', the stopper 48 moves the load slider 41.
13 is separated from the protrusion 47 in the direction of arrow a'in FIG.

Then, as shown in FIG. 14, the load slider 41 is slid in the arrow a'direction 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 arrow g direction. To do. At this time, the pinion 54 is the rotary damper 51.
Is rotated at a low speed in the direction of arrow g to slide the load slider 41 at a low speed in the direction of arrow a '.

Therefore, as shown in FIG. 14, the cam surface 44a of the load slider 41 escapes from the cam follower piece 38b of the load arm 38 in the direction of the arrow a'at a low speed. (B), the load arm 38 is rotated at a low speed in the arrow f direction 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 into the rotational movement of the load arm 38 in the direction of arrow f by the rotation control unit 45, and the head arm 19 is rotationally controlled in the direction of arrow f at a low speed.

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 of the arrow d from the retracted position shown in FIG. 11A to the operating position shown in FIG. Landed.

That is, the rotary damper 51 damps the moving speed of the upper magnetic head 20a in the direction of arrow d. And in the loading completed state,
As shown in FIG. 14, the road slider 41 has a protrusion 47.
The stopper 48 of the slide plate 10 is brought into contact with the stopper 48 from the direction of the arrow a'and stopped.

During the ejecting operation, the reverse operation of the loading operation described above is performed, and the stopper 48 is projected by the projection 47 by the returning movement of the slide plate 10 in the direction of the arrow a.
Pull the load slider 41 through the coil spring 46
Against, as shown in FIG. 13, it moves back in the direction of arrow a.

At this time, the rack 57 of the rack plate 56 moves the pinion 54 of the rotary damper 51 to the arrow g'in FIG.
Although the rotary damper 51 is driven to rotate in the direction, the rotation of the rotary damper 51 is free from the rotation in the direction of the arrow g ′.
The load slider 41 is moved by the slide plate 10 in the direction of arrow a.
Moves back smoothly in the direction.

Then, 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, so that the load arm 38 is a plate. It is smoothly rotated in the direction of arrow f ′ against the spring 49.

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

Accordingly, the load arm 38 smoothly moves in the direction of arrow f'while being raised in the direction of arrow c'from the loading position to the loading start position. Then, the head arm 19 is moved from the operating position shown in FIG.
The upper magnetic head 20a is smoothly lifted to the retracted position by pushing up in the arrow d'direction against the leaf spring 18 to the retracted position shown in FIG.

[0049]

[Description of assembly device for shutter opening / closing arm] Figs. 1 to 5
The assembly device 59 of the shutter opening / closing arm 26 that also serves as the trigger arm will be described below.

First, the shutter opening / closing arm 26 that also serves as a trigger arm is pressed by a sheet metal, and is substantially L-shaped as a whole by the linear arm 61 and the fan-shaped arm 62 integrally formed on both sides of the disc portion 60. And a fulcrum hole 63 is formed at the center of the disc portion 60. A slit 64 cut toward the center of the fulcrum hole 63 is formed on a part of the outer circumference of the disc portion 60. Then, a shutter engagement piece 65 which also serves as a guided piece is vertically cut down from one side surface on the tip side of the linear arm 61, and a curled shutter engagement portion 66 is formed at the tip of the shutter engagement piece 65. ing.
In addition, a stopper piece 67 is vertically cut and raised from the other side surface of the intermediate portion of the linear arm 61, and the stopper piece 6 is cut and raised.
A spring locking portion 68 bent in a substantially V shape is formed at the tip of 7. A small convex portion 69 is bulged on the lower surface of the tip of the linear arm 61.

Next, the cassette holder 8 which is a loading member is pressed by sheet metal,
A burring fulcrum shaft 71 is integrally formed on the upper part of one side of the top plate 8a on the arrow a direction side, and a hook portion 72 is vertically cut on the top plate 8a in the vicinity of the fulcrum shaft 71. Have been awakened. The tip of the hook portion 72 is formed radially toward the center of the fulcrum shaft 71, and the thickness of the shutter opening / closing arm 26 is between the lower surface of the tip of the hook portion 72 and the upper surface of the top plate 8a. A matching gap 73 is formed. Further, the shutter opening / closing arm 2 is attached to the top plate 8a.
An arc-shaped elongated hole 74 for guiding the narrow root portion 65a of the shirt engaging piece 65 of No. 6 is formed. Also, the top plate 8a
Spring engaging pieces 75a and 75b are cut and raised at the upper part on the opposite side of the fulcrum shaft 71 with the arc-shaped long hole 74 interposed therebetween.

Next, the slide plate 10 which is a drive member is pressed by a sheet metal, and the top plate 10 thereof is used.
A shutter opening / closing arm 2 is provided on one side of the arrow a direction of the arrow a.
A horizontal stopper portion 77 is integrally formed on the upper part of one side of the rotation range of 6. Then, one side surface of the stopper portion 77 is formed as 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 downward from the end portion of the stopper portion 77 on the arrow a direction side, and a small convex portion 79 is bulged on the lower surface of the stopper portion 77 in the vicinity thereof. There is.

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

First, in FIG. 2 and FIG. 5A, the shutter engagement piece 65 of the shutter opening / closing arm 26 is obliquely inserted into the arcuate elongated hole 74 of the top plate 8a of the cassette holder 8 from above, and then downwardly inserted. After penetrating, as shown in FIGS. 2 and 5A and 5B, the shutter opening / closing arm 26
The fulcrum hole 63 is fitted into the fulcrum shaft 71 of the cassette holder 8 from above, and the shutter opening / closing arm 26 is horizontally placed on the top plate 8a.

At this time, the slit 64 of the disk portion 60 of the shutter opening / closing arm 26 is inserted into the gap 73 which is the lower position of the hook portion 72. 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 engagement piece 65 sandwiches the top plate 8a from below. The root portion 65 is loosely fitted in the arcuate elongated hole 74.

Next, as shown in FIG. 3 and FIG. 5B, the shutter opening / closing arm 26 is rotated about the fulcrum shaft 71 in the direction of arrow b, which is one side, to move the slit 64 into the hook portion 72. By displacing it in the direction of arrow b, which is one side, the outer circumference 6a of the disc portion 6 is inserted into the gap 73 below the hook portion 72, and the hook portion 72 circles the shutter opening / closing arm 26. The plate portion 60 is pressed in from above.

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 then the FIGS.
As shown in (B), the stopper portion 7 of the slide plate 10
7 is laid horizontally on top of the top plate 8a of the cassette holder 8. At this time, the small convex portion 79 of the stopper portion 77 sandwiches the fulcrum shaft 71 of the disc portion 60 and presses the side opposite to the hook portion 72 from above.

Next, as shown in FIG. 3, the coil portion 34a of the torsion coil spring 34 is locked to the spring locking piece 75a of the cassette holder 8, and both ends 34b and 34c of the spring locking portion of the shutter opening / closing arm 26 are locked. 68 and the spring locking piece 75b of the cassette holder 8 are locked, and the shutter opening / closing arm 26 is rotationally biased in the direction of arrow b ′ by the torsion coil spring 34. Then, the stopper piece 67 of the shutter opening / closing arm 26 is brought into contact with the stopper surface 78 of the stopper portion 77 of the slide plate 10 from the direction of the arrow b ′.

Then, as shown in FIG. 3, the stopper portion 77 regulates the backward movement position of the shutter opening / closing arm 26 in the direction of the arrow b ', so that the slit 64 is formed in the hook portion 72.
The shutter opening / closing arm 26 cannot be returned from the cassette holder 8 to the position overlapping with the position (the position shown in FIG. 2) in the direction of the arrow b ′, and the assembly of the shutter opening / closing arm 26 is completed.

When the shutter opening / closing arm 26 is disassembled from 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, in the state before the loading is started, the cassette holder 8 is raised to the loading position shown in FIG. 12A in the direction of arrow c ', and the top plate 8a is the lower surface of the top plate 10a of the slide plate 10. Being close to. Then, the shutter opening / closing arm 26 is moved back to the returning position shown in FIG. 3 by the torsion coil spring 34 in the direction of arrow b ′, and the stopper piece 67 thereof 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 is returned to the return position shown in FIG. 9 in the direction of arrow a 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 abutted and locked from an arrow a ′ direction on an arcuate outer peripheral surface 62a centered on the fulcrum shaft 71 of the fan-shaped arm 62.

Therefore, when loading the cassette 2 horizontally in the cassette holder 8 from the direction of the arrow a as shown in FIG. 9 at the time of loading, as shown in FIG. The front end surface 2a of the cassette 2 and the one side surface 81a of the shutter 81 slidably attached in the arrow k and k'directions along the front end surface 2a are brought into contact with a corner portion.

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 against the torsion coil spring 34 as shown in FIG. While being rotated in the b direction, the shutter engaging portion 65 of the shutter opening / closing arm 26 pushes the shutter 81 in the direction of the arrow k against the built-in spring (not shown) to open the pair of upper and lower openings 82 of the shutter 81. 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 the top plate 8 of the cassette holder 8.
The cassette stopper 83, which is cut down from the end of the a on the arrow a direction side, is abutted and stopped.

Then, at the moment when the shutter 81 is opened and the shutter opening / closing arm 26 is moved forward to the forward moving position in the direction of arrow b as shown in FIG. 4, the fan-shaped arm 62 of the shutter opening / closing arm 26 slides. The lock 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 backward movement position is released. (This lock release operation is a mechanical trigger operation for the slide plate 10).

At that moment, as described above, the slide plate 10 moves from the backward movement position shown in FIG.
2B to the forward movement position shown in FIG. 12B, and the cassette holder 8 moves 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 one side surface 62b of the fan-shaped arm 62 of the shutter opening / closing arm 26 in the direction of arrow a '. When the shutter opening / closing arm 26 is lowered together with the cassette holder 8 to the loading position shown in FIG. 12 (B) in the direction of arrow c, one side surface 62b of the fan-shaped arm 62 is connected to one side surface 33a of the locked portion 33. Is lowered while abutting on. Therefore, the shutter opening / closing arm 26 is lowered in the arrow c direction together with the cassette holder 8 in a state of 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 eject operation is the reverse operation of the above-described loading operation. When the eject button 35 is pressed, the slide plate 10 is returned in the direction of arrow a from the forward movement position of FIG. 4 to the backward movement position of FIG. When moved, one side surface 33 a of the locked portion 33 causes the fan-shaped arm 6 of the shutter opening / closing arm 26 to move.
The shutter opening / closing arm 26 is released from the one side surface 62b in the direction of the arrow a, and the lock of the shutter opening / closing arm 26 at the forward movement position is released.

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

When the finger pressing the eject button 35 is released, the slide plate 10 is urged by the pair of tension coil springs 32 in the direction of arrow a ', and the locked portion 33 is shuttered, as shown in FIG. The slide plate 10 is abutted against the outer peripheral surface 62a of the fan-shaped arm 62 of the opening / closing arm 26 from the direction of arrow a ', and the slide plate 10 is locked as it is in the returning position in the direction of arrow a.

The above is a description of one embodiment of the present invention.
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, in the shutter opening / closing arm assembly device, the fulcrum shaft 71 is attached to the top plate 8 of the cassette holder 8.
The fulcrum hole 63 is formed on the shutter opening / closing arm 26 by burring on the a. On the contrary, the 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. It may be formed in Further, the present invention is not limited to a disk device for a floppy disk, but can be applied to various disk devices for recording and reproducing various disks.

[0073]

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

Since the shutter opening / closing arm that also serves as the trigger arm can be easily assembled on the cassette holder without using the flange-added tightening shaft, the number of parts, processing man-hours and assembly man-hours can be greatly reduced. Since the caulking jig can be eliminated, the assembly work time can be greatly shortened, and the cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view illustrating a shutter opening / closing arm assembly device for a disk device that is an embodiment of the present invention.

FIG. 2 is a plan view for explaining an assembling operation of the shutter opening / closing arm assembling apparatus of the above.

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

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

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

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

FIG. 7 is a plan view illustrating an opened state of a cassette shutter opening / closing operation.

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

FIG. 9 is a plan view of the entire disc device before the disc loading is started.

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

11A is a sectional side view taken along the line CC of FIG. 9, and FIG. 11B is a 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 head damping mechanism of the disk device before the start of damping.

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

[Explanation of symbols]

 1 Floppy disk (disk) 2 Cassette 8 Cassette holder (loading member) 10 Slide plate (driving member) 26 Shutter opening / closing arm also serving as a trigger arm 59 Shutter opening / closing arm assembly device 60 Disc portion 61 Straight arm 62 Fan arm 63 Support point hole 64 Slit 66 Shutter engagement part 67 Stopper piece 71 Support shaft 72 Hook part 73 Gap 77 Stopper part 78 Stopper surface 81 Shutter

Claims (1)

[Claims] 1. A loading member for loading a cassette containing a disc from a loading start position to a loading position, and a drive for driving the loading member from the loading start position to the loading position by moving from a backward movement position to a forward movement position. And a shutter of the cassette which is rotatably mounted on the loading member and is inserted into the loading member at the loading start position, and
In a disk device provided with a shutter opening / closing arm that also serves as a trigger arm that unlocks the drive member at the backward movement position upon completion of insertion of the cassette, and moves the driving member from the backward movement position to the forward movement position, A fulcrum shaft formed on the loading member or the shutter opening / closing arm, a fulcrum hole formed on the shutter opening / closing arm or the loading member and fitted to the fulcrum shaft, the fulcrum hole of the shutter opening / closing arm, or The slit formed on the outer periphery of the disk portion having the fulcrum shaft is formed on the loading member, and the slit of the shirt opening / closing arm is inserted when the fulcrum hole and the fulcrum shaft are fitted from above. Is formed integrally with the hook member and the drive member, and the slit is returned to the position where it overlaps with the hook portion. Shutter opening and closing arm assembly device of the disk apparatus characterized by comprising a stopper portion for regulating the backward movement position of the shutter opening and closing arm so as not.