JPH05314616A - Disk device - Google Patents

Abstract

PURPOSE:To make the device thin and to prevent the generatin of a damage to a head. CONSTITUTION:A sliding plate 68 which moves back and forth by the insertion and ejection of a disk cartridge 3 is provided with a cam 75a for giving the turning force of a cartridge direction to a receiving plate 61 by the insertion of the disk cartridge 3 and is always provided with an elastic force for turning the receiving plate 61 in a reverse cartridge direction by a plate spring 65. Therefore, the receiving plate 61 is rotated by the movement back and forth of the sliding plate 61 at the time of inserting/ejecting the cartridge and by the rotation of this receiving plate 61, a projecting part 63 goes in and out of the recessed part 48 of the disk cartridge 3. Thus, the floating and sinking amounts of the disk cartridge 3 are reduced without lowering the height of the projecting part 63 for deciding the position of the disk cartridge 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device suitable for use in, for example, a floppy disk device.

[0002]

2. Description of the Related Art Disk devices such as floppy disk devices are widely used in office computers, word processors, etc., including personal computers, and their spread is remarkable.

Conventionally, this type of disk device is constructed, for example, as shown in FIG. This will be described with reference to the same figure. In the figure, reference numeral 1 is a chassis having a spindle center 2 as a disk rotation center, and is housed in a device housing (not shown) such as a personal computer. It is formed by a bottomed box that has a storage space 1a that is open to the front and that faces the disk cartridge 3. On the rear right side of the bottom surface of the chassis 1, a holding wall 4 having a through hole 4a opening in the front-rear direction and a support shaft 5 juxtaposed with the holding wall 4 at a predetermined interval are erected. Two spring engaging pieces 6 are juxtaposed on each of the springs 6a and 6b arranged in parallel in the left-right direction at a predetermined interval. Further, on both side walls of the chassis 1, there are integrally provided guide grooves 7 (only two left guide grooves are shown) extending vertically.

Reference numerals 8 and 9 denote two pairs of protrusions arranged in parallel with each other in the front-rear direction at a predetermined interval, which are attached to the bottom surface of the chassis 1 and configured to guide a slide plate described later in the front-rear direction. There is. These pairs of stems 8 and 9
Are juxtaposed with each other at a predetermined interval in the left-right direction. Of these, the rear projection 9 is integrally provided with a conical positioning portion 9a whose outer diameter decreases toward the tip.

Reference numeral 10 denotes a U-shaped slide plate in cross section having an eject button 11 for ejecting a disk cartridge on the right side of the front edge thereof, which is a U-shaped notch 12a in plan view facing the spindle center 2 and the spring. The chassis 1 comprises a bottom plate 12 having a first elongated hole 12b facing the locking piece 6 and two side plates 13 standing on both sides of the bottom plate 12 and facing each other with a predetermined gap.
It is provided so that it can move back and forth.

On the bottom plate 12 of the slide plate 10, a spring engaging member corresponding to the notch 14 and the second elongated hole 15 and the spring locking piece 6 which both the protrusions 8 and 9 face and extend in the front-rear direction. A stop hole 16 is provided. Further, a lock claw 17 protruding downward is attached to the rear end edge of the bottom plate 14 of the slide plate 10.

On the other hand, the side plate 13 of the slide plate 10 is formed with four front, rear, left and right cam grooves 18 having a slope that rises obliquely forward. Behind these cam grooves 18, the cam grooves 18 extend in the front-rear direction. An existing rack 19 is provided.

Reference numeral 20 denotes two tension coil springs for urging the slide plate 10 forward, and both ends thereof are locked to the spring locking pieces 6 and the spring locking holes 16, respectively.

Reference numeral 21 denotes a trigger arm having an engaging surface 21a corresponding to the lock claw 17 and a guide surface 21b, which is rotatably provided on the support shaft 5 and has a spring protruding laterally on the upper end surface. An arm operator 22 having a locking protrusion 22a is integrally provided.

Reference numeral 23 is a torsion spring for urging the trigger arm 21 to rotate in a direction in which the slide plate 10 is locked. A winding portion is provided around the support shaft 5, and both ends thereof are the protrusions. 22a and the holding wall 4 are engaged.

A stepping motor 24 for feeding the head carriage is fixed to the rear end of the chassis 1. The output shaft 25 of the stepping motor 24 is formed by a lead screw rod that has a spiral V-shaped groove 25a and extends in the front-rear direction, and a tip portion of the output shaft 25 has a bearing (not shown) in the through hole 4a. Is supported through.

Reference numeral 26 denotes a guide rod extending in the front-rear direction, which is held in the rear center of the chassis 1 and is configured to guide the head carriage described later in the front-rear direction.

27 is a needle pin 2 projecting obliquely rearward
8 and a head carriage having a leaf spring 29 that presses the needle pin 28 into the V-shaped groove 25a of the output shaft 25. The head carriage is inserted into the guide rod 26 so as to be movable back and forth and is provided above the chassis 1. There is. A first head 30 for reading recorded information on a disc is held at the tip of the head carriage 27, and a head arm 32 having a second head 31 corresponding to the first head 30 at the rear upper end. Is swingably attached via an elastic body 33. The head arm 32 is rotationally biased by a torsion spring 34 in a direction in which the second head 31 approaches the first head 30,
A stopper 32a for laterally projecting the arm rotation is integrally provided on one side edge.

Reference numeral 36 denotes a cartridge holder for inserting / removing the disk cartridge 3, which is provided in the slide plate 10 so as to be movable up and down. Rollers 37 facing the cam grooves 18 and the guide grooves 7 are rotatably held at both side ends of the cartridge holder 36.
A cut-and-raised piece 38 having a locking hole 38a that is open to both sides is provided on the side edge on one side of the upper end portion. The cartridge holder 36 is attached to the bottom plate 12 when the slide plate 10 moves forward due to the disengagement of the lock claw 17 and the engagement surface 21a by the pressing of the disk cartridge 3 against the arm operator 22. On the other hand, when the slide plate 10 moves rearward due to the engagement of the lock claw 17 and the engagement surface 21a by the pressing of the eject button 11, the slide plate 10 is separated from the bottom surface portion 12.

Reference numeral 39 denotes an arm for opening and closing the shutter 3a of the disk cartridge 3, which is rotatably provided on the rear side edge of the upper end portion of the holder 36. A locking piece 40 protruding upward is integrally formed with the arm 39.

Reference numeral 41 is a coil spring for tensioning which gives the arm 39 a habit of returning.
0 and is locked in the locking hole 38a.

Reference numerals 42 and 43 denote types of the disk D (2D
D, 2HD, 2ED) switch and disk D
Is a switch for detecting whether or not writing is possible, and is installed on the chassis 1 via a substrate 44.

Reference numeral 45 denotes a reduction gear mechanism having a gear 46 that meshes with the rack 19 and is installed on the side edge of the rear end portion of the chassis 1.

Reference numerals 47 and 48 in the figure are positioning recesses which are provided in the case 3b of the disk cartridge 3 and through which the respective projecting members 9 come in and out.

[0020]

By the way, in this type of disk device, the disk cartridge 3 is sunk in the chassis 1 when the cartridge is mounted and is floated when the cartridge is ejected. Along with this, the sinking amount and the floating amount of the disc cartridge are decreasing, so that it is necessary to set the height of the protrusion 9 for positioning the disc cartridge 3 to a low dimension.

However, if the height of the protrusion 9 is lowered, the timing at which the disc cartridge 3 starts to be positioned when the cartridge is mounted is delayed, and the head arm 32 is lowered before the disc cartridge 3 is positioned by the protrusion 9. However, the second head 31 may collide with the disk cartridge 3 and may be damaged.

For this reason, there has been a demand for the appearance of a disk device capable of reducing the floating amount and the sinking amount of the disk cartridge 3 without lowering the height of the protrusion 9 in the past.

The present invention has been made in order to meet such a demand, and provides a disk device capable of complying with the recent thinning of the device and preventing damage to the head.

[0024]

DISCLOSURE OF THE INVENTION A disk device according to the present invention includes a chassis for holding a disk cartridge having a positioning recess therein so that the disk cartridge can be inserted and removed, and a positioning recess provided on the chassis for rotation. It is equipped with a receiving plate that has a protrusion that moves in and out of the disk, and a slide plate that is provided between the receiving plate and the chassis and that moves forward and backward in the forward and backward directions by inserting and removing the disk cartridge. A cam surface is formed on the plate for applying a rotational force in the cartridge direction, and an elastic body is constantly applied with an elastic force such that the receiving plate is rotated in the anti-cartridge direction.

[0025]

According to the present invention, when the cartridge is attached or detached, the receiving plate rotates due to the forward / backward movement of the slide plate, and the rotation of the receiving plate causes the protrusions to move in and out of the positioning recesses of the disk cartridge.

[0026]

Embodiments of the present invention will be described in detail below with reference to embodiments shown in the drawings.

FIGS. 1A and 1B are sectional views for explaining the operation of the disk device according to the present invention when the cartridge is attached and detached, and FIG. 2 is a plan view showing the disk device for the present invention. In the figure, the same or equivalent members as those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted. In the description of the embodiment, the same or equivalent members as those used in the description of the conventional example are designated by the same reference numerals.

In the figure, reference numeral 51 denotes a chassis having a spindle center 52, which is housed in a device housing (not shown) of a personal computer or the like, and is opened to the front as a whole, and the disk cartridge is opened. It is formed by a bottomed box having a storage space 51a facing the inside. The chassis 51 projects upward at both side edges of the front end and both side edges of the rear end.
The individual guides 53 are attached, and the guide 53 on the right side edge of the rear end portion is provided with a spring locking piece 53a protruding upward. Also, this chassis 5
A supporting shaft 54 protruding upward is provided on the right side edge of the rear end portion of 1, and a front panel 55 having a disc insertion opening (not shown) opening in the front-rear direction is attached to the front end edge. There is. It should be noted that the bottom of the chassis 51 is provided with two spring locking pieces 51b arranged in parallel in the left-right direction at a predetermined interval.

Reference numerals 56 and 57 denote two support shafts extending in the left-right direction, each of which is juxtaposed in the left-right direction at a predetermined interval and is supported on the chassis 51 via holding bodies 58, 59, respectively. There is.

Reference numerals 60 and 61 denote receiving plates having protrusions 62 and 63 which come in and out into the recesses 47 and 48 of the disk cartridge 3, respectively, which are rotatably provided on the support shafts 56 and 57 and which are provided at the front. One end of the chassis 51 is attached to the edge.
The leaf springs 64 and 65 as elastic bodies that are pressed against the
It is fixed by 6,67.

Reference numeral 68 denotes a slide plate which has an eject button 69 for ejecting a disk cartridge on the right side of the front edge thereof and which is substantially U-shaped in cross section. The bottom plate 70 has a notch 70a facing the spindle center 52, and Bottom plate 70
It is composed of two side plates 71 which are erected on both sides of the chassis and are opposed to each other at a predetermined interval, and are provided between the chassis 51 and the receiving plates 60 and 61. And
The slide plate 68 is configured to be able to move forward and backward by inserting and removing the disc cartridge 3.

The bottom plate 70 of the slide plate 68 has a first elongated hole 72 in which each of the guides 53 faces and extends in the front-rear direction.
A second elongated hole 73 is provided which extends in the front-rear direction, facing the switches 42 and 43. This slide plate 6
On the bottom plate 70 of No. 8, cam surfaces 74a and 75a for imparting rotational force in the cartridge direction to the receiving plates 60 and 61 by inserting the disk cartridge 3 and horizontal surfaces 74b and 75b connected to the cam surfaces 74a and 75a.
The cut-and-raised pieces 74 and 75 having the above are formed, and the leaf springs 64 and 65 constantly apply the elastic force so that the receiving plates 60 and 61 rotate in the anti-cartridge direction. The receiving plates 60, 61 and the leaf springs 64, 6 are provided on both side edges of the rear end of the bottom plate 70.
Opening windows 76 and 77 that partly face 5 are provided, and a projecting piece 78 having a rack 78a extending in the front-rear direction is integrally provided at a substantially central portion of the rear end edge. A lock claw 79 protruding upward is provided on the right side edge of the rear end of the bottom plate 70, and the notches 70 are formed on both sides.
A spring locking piece 80 protruding into the inside of a is provided.

On the other hand, on the side plate 71 of the slide plate 68,
Similar to the slide plate 10, four cam grooves (not shown) are provided in the front, rear, left, and right facing the rollers 37 of the holder 36.

Reference numerals 81 and 82 denote two tension coil springs for urging the slide plate 68 forward, and both ends thereof are locked to the spring locking pieces 51b and the spring locking pieces 80, respectively. ..

Reference numeral 83 denotes a transmission shaft extending in the left-right direction, which is rotatably supported by the chassis 51 via two holding bodies 84. The transmission shaft 83 includes the rack 78a.
A gear 85 that meshes with the gear 85 and a contactor 86 that is parallel to the gear 85 and has a predetermined interval, for example, is elliptical in cross section.

Reference numeral 87 is a needle pin 8 projecting obliquely rearward.
8 and a head carriage having a leaf spring 89 that presses the needle pin 88 against the wall of the V-shaped groove 25a of the output shaft 25. The head carriage is inserted into the guide rod 26 so as to be movable back and forth and is provided above the chassis 51. The stepping motor 24 is configured to move forward and backward.

Reference numeral 90 denotes two upper and lower head arms (only one is shown) which holds a head 91 for reading recorded information on the disk, which is held by the head carriage 87 via elastic pieces 92 (only one shown). ing. Both of these head arms 90 (only one is shown) are provided with the transmission shaft 8
The contactor 86 is rotated by the rotation of 3 to swing,
The heads 91 are configured to be separated from each other and approach each other.

Reference numeral 93 denotes a trigger arm having an engaging claw 94 corresponding to the lock claw 79, which is rotatably provided on the support shaft 54. The trigger arm 93 is provided with an arm operator 95 protruding upward and a spring locking piece 96 protruding laterally of the arm operator 95.

Reference numeral 97 is a coil spring for tensioning for biasing the trigger arm 93 to rotate in the direction in which the slide plate 68 is locked, and both ends thereof are the spring locking pieces 9 respectively.
It is locked to 6, 53a.

In the disk device constructed as described above, the receiving plates 60 and 61 rotate due to the forward / backward movement of the slide plate 68 when the cartridge is attached / detached.
With the rotation of 1, the protrusions 62 and 63 move in and out of the recess 46 of the disk cartridge 3.

That is, in order to mount the disc cartridge 3 at the cartridge mounting position in the chassis 51, the disc cartridge 3 is inserted into the cartridge holder 36 and the arm operation member 95 is pressed as shown in FIG. 1 (A). Since the lock claw 79 of the slide plate 68 and the engagement claw 94 of the trigger arm 93 are disengaged, the slide plate 68 advances due to the elastic force of the coil springs 80 and 81. As a result, the roller 37 moves from the upper position to the lower position along the cam groove (not shown), the cartridge holder 36 moves downward, and the protrusion 62,
63 cut-and-raised pieces 74, 75 cam surfaces 74a, 75a
Along the horizontal plane 74 as shown in FIG.
In order to ride on b and 75b, the protrusions 62 and 63 are exposed in the recesses 47 and 48, and the disc cartridge 3 is positioned in the horizontal direction with respect to the chassis 51.

On the other hand, in order to remove the disc cartridge 3 from the cartridge mounting position in the chassis 51, the eject button 69 is pressed in the cartridge inserting direction.
The slide plate 68 retreats to engage the lock claw 79 and the engagement claw 94, and the roller 37 moves from the lower position to the upper position along the cam groove (not shown) to move the cartridge holder 36 upward. To do. As a result, the protrusions 62, 6
3 moves downward from the horizontal surfaces 74b, 75b of the cut-and-raised pieces 74, 75 along the cam surfaces 74a, 75a and stops on the bottom surface of the slide plate 68, so that the protrusions 62, 63 are exposed to the outside of the recesses 47, 48. Then, the horizontal positioning of the disc cartridge 3 with respect to the chassis 51 is released. Then, the disc cartridge 3 is ejected forward from the cartridge holder 36 by the pressing of the arm operating element 95 by the elastic force of the coil spring 97.

Therefore, in this embodiment, the heights of the protrusions 62 and 63 for positioning the disc cartridge 3 are not lowered, but the floating amount and the sinking amount of the disc cartridge 3 (H ₁ -H ₂ in FIG. 1). The height dimension) can be reduced.

The present invention is not limited to the above-described embodiments, but various effective modifications and changes can be made based on the technical idea of the present invention.

[0045]

As described above, according to the present invention, a chassis for holding a disc cartridge having a positioning recess therein so that it can be inserted and removed, and a positioning recess provided on the chassis so as to be rotatable. It is provided with a receiving plate having a protruding and retracting protrusion, and a slide plate provided between the receiving plate and the chassis and moving forward and backward by inserting and removing the disc cartridge. Since a cam surface that gives rotational force in the cartridge direction is formed in the cartridge, and an elastic body always provides an elastic force such that the receiving plate rotates in the opposite cartridge direction, the slide plate moves forward and backward when the cartridge is attached and detached. The receiving plate rotates, and the protrusion moves in and out of the positioning recess of the disk cartridge by the rotation of the receiving plate. It becomes door.

Therefore, since the height of the protrusion for positioning the disk cartridge can be reduced and the floating amount and the sinking amount of the disk cartridge can be reduced, it is possible to comply with the recent thinning of the device and the head. It is possible to prevent the occurrence of damage.

[Brief description of drawings]

FIGS. 1A and 1B are cross-sectional views for explaining the operation of a disk device according to the present invention when a cartridge is attached and detached.

FIG. 2 is a plan view showing a disk device according to the present invention.

FIG. 3 is an exploded perspective view showing a conventional disk device.

[Explanation of symbols]

 3 ... Disk cartridge 47, 48 ... Recessed portion 51 ... Chassis 60, 61 ... Receiving plate 62, 63 ... Protrusion 64, 65 ... Leaf spring 68 ... Slide plate 74, 75 ... Cut-and-raised piece 74a, 75a ... Cam surface 74b, 75b … Horizontal

Claims (1)

[Claims] 1. A chassis for holding a disc cartridge having a positioning recess therein so that the disc cartridge can be inserted and removed, and a receiving plate having a protrusion rotatably mounted on the chassis for moving in and out of the positioning recess. The slide plate is provided between the receiving plate and the chassis and moves forward and backward by inserting and removing the disc cartridge. The slide plate has a rotating force in the cartridge direction which is applied to the receiving plate when the disc cartridge is inserted. The disk device is characterized in that a cam surface for imparting a force is formed, and an elastic body constantly exerts an elastic force such that the receiving plate is rotated in a direction opposite to the cartridge direction.