JPS58147861A - Floppy disk driving device - Google Patents

Abstract

PURPOSE:To make the transmission of an electric noise and a magnetic noise to a disk and a magnetic disk hard and to prevent a write error and a read error, by equipping a head assembly which has an arm part supported by the slanting part of a bent lever and supports the magnetic head. CONSTITUTION:When a door 1 is opened, the tip of a head-up lever 11 is lifted up by a leaf spring 6. This head-up lever 11 has a spring part where a hole is formed and a rigid body at a punched-out part, so it rotates around the hole part to engage a head arm 8b at its slanting part, thereby lifting up the head arm 8b. Consequently, the upper unit of the head assembly 8 rises against the displacing force of a head pressure spring 9 to lift up a magnetic head 8a. Then when the door 1 is closed, the leaf spring 6 is lowered and the head-up lever 11 moves down. In the middle of the lowing of this head-up lever 11, the head arm 8b is locked by the slanting part of the bent lever 12 and left there. Then, a flat motor is driven to rotate a hub.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk drive device that performs writing and reading by moving a magnetic head and bringing it into contact with a desired position on the disk.

Conventionally, in order to load and unload a magnetic head,
A structure in which a Clara 9-type magnet is installed below a floppy disk (hereinafter referred to as a disk), and the tip of the iron 9-, which is activated by this Clapper-type magnet, detours around the disk and supports the magnetic head on the top side of the disk. To perform writing and reading, the Kurazuno 9 magnet was activated, the tip of the iron lever was lowered, and the magnetic head was brought into contact with the disk.

For this reason, the above-mentioned conventional type has the disadvantage that it cannot be made thinner than the sum of the height of the clapper-shaped magnet, the thickness of the disk, the thickness of the iron lever, the thickness of the magnetic head, and a slight gap. Another drawback was that it required a lot of man-hours to process the iron lever into a complicated shape. Furthermore, because the clapper magnet is located close to the disk or magnetic head, it is difficult for electrical noise or magnetic noise to be transmitted to the disk or magnetic head, which may cause write or read errors or prevent information recorded on the disk. It had the disadvantage that it was destroyed.

In order to eliminate the above-mentioned drawbacks, the present invention has a plunger magnet installed horizontally outside the mounting range of the disk, and an inclined part at the end of the plunger magnet, which is rotated υ by the plunger magnet.
The head assembly includes a lever and a head assembly that supports a magnetic head and has an upper portion supported by an inclined portion of the L-shaped lever, and will be described in detail below with reference to the drawings.

FIG. 1 is a plan view and side view showing an entire embodiment of the present invention, and FIGS. 2 to 9 are views showing elements of this embodiment. In FIG. 1, as shown in detail in the perspective view of FIG. 2, a right side plate 1m, a left side plate 1b, and a cam part IC are integrally molded, and a lock pin 1d is fixed to the left side plate 1b. The door is biased to rotate clockwise by a door spring Je, 2 is a disk in which a flexible disk with magnetic films formed on both sides is enclosed in a jacket, 3 is a plan view of FIG. As shown in detail in the side view, a spring discharger 4 is formed by bending a wire to form a slide portion 3a and a hook portion 3b, and guides the disk 2, and is shown in detail in the perspective view of FIG. As shown in FIG. 5, a guide glock 5 has guide bodies 4a and 4b for guiding the ejection bar 3 and a guide groove 4c, and has an inclined block 4d for guiding the sliding portion 3a of the ejection bar 3 to the lock position. A clamp lever is rotatably supported on a shaft 5a and biased counterclockwise by a clamp spring 5b.One end of the clamp lever 5 is attached to each of the right side plate 1a and the left side plate 1b of the door 1. It can be attached to the upper end surface of.

6 is a leaf spring whose one end is fixed to the other end of the clamp lever 5 and the other end is also supported by the other end of the clamp lever 5, and 7 is a collet suspended with play in the leaf spring 6. In addition, the collet 2 can move up and down and swing relative to the leaf spring 6.

8 is a head assembly having a pair of magnetic spades 8a facing the upper block and the lower block, and a head arm 8b on the upper block; 9 is a spatula Yfv shear that biases the upper block of the door assembly 8 downward; A spring 1o is a near motor that drives the head assembly 8 in a straight line, and a hole 11a is provided near the fixed end as shown in detail in the plan view, front view, and side view of FIG.
1. A to the tip of the free end is stamped and formed to form a stamped part 11b, and the range A is further bent to form an inclined part 11c.
The fixed end of the head up lever 11 is fixed to the frame, the free end is supported by the leaf spring 6, and the inclined part 11c is connected to the helad arm 8b.
It is in a position where it can support.

12 is an inclined portion 12 as shown in detail in the perspective view of FIG.
The L-shaped lever 12 is made of plastic and has a shaft 12b, a groove 12c, and a pad 12d.The inclined portion 12a of the L-shaped lever 12 is located at a position where it can support the helad arm 8b. 1
Reference numeral 3 designates a plant magnet which is installed horizontally outside the mounting range of the disk 2 and rotates the lever 12, and reference numeral 14 represents an optical sensor that detects the index hole of the disk 2.

FIG. 7 is a view taken along the plane A-A' of the embodiment shown in FIG. 1 and showing only the essential parts. 16 is a torsion spring that biases this reset lever J5 clockwise; 17 is a discharge par 3;
It is an ejection spring that biases the

FIG. 8 is a cross-sectional view of the embodiment shown in FIG. The hub 19 that holds and rotates the disk 2 is formed with a hole 19a slightly larger than the support shaft and a zigzag groove with a width that allows the lock pin 1d to pass through, as shown in an enlarged view in FIG. stopper surface 19b.

19c, 19t1.19e, cam surface 19-f, cam surface 19g formed at the tip, and store/4' surface 19
The cam surface 19g of this lock lever 19 receives rotational force from the lock pin 1d, and the cam surface 19f receives rotational force from the lock pin 1d.
d is temporarily stopped, the stopper surfaces 19b and 19c hold the lock pin 1d in the lock position, and the stopper surface 19d
has a shape that temporarily stops the lock pin 1d at the release position. 20 is a coil spring that presses this lock lever 19 perpendicularly to the plane of the paper. Incidentally, the inclined portion 11c of the head azo lever 11 and the inclined portion 12 of the L-shaped lever 12
Each inclined surface is formed at an angle of inclination that is parallel to the disk 2 when the magnetic head 8a is lifted.

In the above configuration, the door opening/closing mechanism will first be explained with reference to the explanatory diagrams of FIGS. 10 and 11. First, when the door 1 is closed, as shown in FIG.
9b and 19c and held in the locked position.

Now, when the door 1 is pushed in the direction of the arrow, the lock pin 1d
As shown in FIG. 10, after it comes into contact with the stocking surface 19e, it moves to a position where it contacts the stocking surface 19e. The state in which the lock bin 1d and the lock lever 19 are engaged at this time is shown in a sectional view as viewed from above as shown in FIG. 11 (,). Next, when the pressure is released by releasing the hand, the door 1 rotates clockwise due to the biasing force of the door spring 1e, and the lock pin 1d is moved from the lock lever 19 as shown in FIG. 11(b). The tongue piece 19b is pushed away to separate from the lock lever 19, and the door 1 opens as shown in FIG. 10(C). At this time, the reason why the lock lever 19 is inclined as shown in FIG. coil spring 2
It relies on a support structure with a large degree of freedom in that it is pressed and supported with zero biasing force. Also, the door 1 is attached to the coil spring 1e.
When the cam surface 19 is rotated counterclockwise against the biasing force of
g receives the turning force from the lock bin 1d, and the lock lever 19
The lock pin 1d then comes into contact with the cam surface 19f of the lock lever 19 and stops as shown in FIG. 10(d). After this, when the pressure is released by releasing the hand, the lock lever 19 rotates counterclockwise under the biasing force of a spring (not shown). As a result, the lock pin 1d enters the groove and returns to the state where it is held by the stop A surfaces 19b and 19c of the lock lever 19, that is, the state shown in FIG. 10 (,), and the door 1 is closed.

Next, the disk ejection mechanism will be explained with reference to the explanatory diagrams of FIGS. 1-2 and 13. First, when the door 1 is opened, as shown in FIG. 12(a), the cam part IC of the door 1 stops one end of the reset lever 15, and the reset lever 1
50 rotations are suppressed. -Also, since the disk has not yet been inserted, the ejection par 3 is positioned furthest to the left due to the biasing force of the ejection sedge ring 17. In this state, when the disk 2 is inserted from the left side, the right end of the disk 2 pushes the hook portion 3b of the ejection par 3 apart and expands the hook portion 3b.
The ejection par 3 is further moved to the right against the biasing force of the ejection spring 17. As shown in FIG. 4, the discharge parlor 3 moves guided by the guide bodies 4a and 4b of the id block 4 and the guide groove 4c, and the slide portion 3a rides up and over the slope of the inclined block 4d. At this time, the slide part 3a is moved to the 12th position by the spring property of the discharge parr 3 itself.
Feeling depressed as shown in Figure). Insertion of the disk 2ρ is now complete, and the disk 2 will not pop out in this state. Next, when the door 1 is closed as shown in FIG.
The reset wire 15b rotates clockwise as the at-rotation axis, thereby lowering the reset wire 15b. Next, when the door 1 is opened as shown in FIG. 12(d), the cam part IC rotates the reset lever 15 clockwise against the biasing force of the torsion spring 16, and the reset wire ISb rises. , the slide portion 3a of the ejection par 3 connects to this reset wire isb.
The robot is pushed up by the robot and climbs over the inclined block 4d.

As a result, the ejection bar 3 is moved to the left by the biasing force of the ejection spring 17, and the disc 2 is ejected. However, since the right end of the disk 2 is held by the hook portion 3b, it is stopped in the state shown in FIG. 4(d), and the disk 2 does not fly out any further to the left. This effect is particularly remarkable when the disk 2 has the cross-sectional shape shown in FIG. In other words, the discs currently on the market are usually 5.2
They are 5 inches and 8 inches in size, but in most cases the ends of the jacket are folded back and glued, so the ends are thicker than the center, creating a step d. ing. Therefore, for disk 2 to be in a free state,
A force is required to further push the hook portion 3b and it cannot easily pop out.

Next, the collet lifting mechanism will be explained with reference to the explanatory diagrams of FIGS. 14 and 15. First, when the door 1 is opened as described above, the clamp levers 5 rotate clockwise under the biasing force of the clamp spring 5b shown in FIG. 1) Lift it up as shown in Figure 1. This plate 6 is the head near lever 11.
The head up lever 1 engages with the head arm 8b and lifts the head arm 8b. Therefore, the upper unit of the head assembly 8 rises against the biasing force of the head pressure spring 9, and the magnetic head 8a on the upper unit side separates from the disk 2.

In this state, the disc 2 can be inserted and ejected. When the door 1 is closed after inserting the disk 2, the upper end surface of the left side plate 1b of the door 1 engages with the clamp lever 5, and the clamp lever 5 is rotated counterclockwise. For this purpose, the disk 2 is held between the collet 7 and the hub 18 as shown in FIG. 14(b).

This process will be explained in more detail with reference to FIG.

First, in the illustrated state, the collet 7 is only suspended by the leaf spring 6, and can move quite freely within certain limits. Next, when the leaf spring 6 descends, the conical surface formed at the bottom of the collet 7 comes into contact with the disk 2,
A horizontal component force is applied to the disk 2. At this time, since the collet 7 can move freely as described above, the collet 7 itself escapes before an excessive force is applied to the disk 2, and the disk 2 is not bitten. In this way, disk 2 moves to its normal position, and disk 2
When the collet 7 and the hub 18 come to grip each other, the collet 7 cannot be lowered.

Therefore, the free end of the leaf spring 6 is left behind from the clamp lever 5 and comes to press the collet 7.

With such a mechanism, even if the leaf spring 6 is a sufficiently strong spring, the operation of the door 1 is easy, and the structure that suspends and supports the collet 2 is extremely thin.

Next, the head elevating mechanism will be explained with reference to explanatory diagrams of FIGS. 14 and 16. First, when the door 1 is opened as described above, the tip of the head-up lever 11 is lifted by the leaf spring 6. As shown in FIG. 5, this head-up lever 11 has a spring portion where the hole 11 is provided, and
Since the portion provided with 1b is a rigid body, it rotates around the hole 1 and engages with the head arm 8b at the inclined portion 11C, thereby lifting the head arm 8b. Therefore, the upper unit of the head assembly 8 is raised against the biasing force of the head pressure spring 9, and the magnetic head 8a is lifted up. Next, when door 1 is closed, the plate no. 6 will go down and the helad door aragreba 1 will go down. While the Helad Argreno 911 is being lowered, the Helad Arm 8b has an L-shaped nozzle 12 as shown in FIG. 16(A).
The slanted portion 12a of the slanted portion 12a is locked and left behind. Next, a flat motor (not shown) is driven to rotate the nozzle 18. At this time, as described above, the collet 7 and the nozzle 18 are holding the disk 2 by the biasing force of the plate nozzle 6, so that the disk 2 rotates. Furthermore, the linear motor 10 is driven to move the head assembly 8 in the radial direction of the disk 2,
The magnetic head 8a is positioned on a desired track of the disk 2. Thereafter, when the Gran Cha magnet 13 is activated and the lever 2 is rotated counterclockwise about the shaft 12b, the pad 16 is lowered as shown in FIG. Press lightly. Furthermore, when the L-shaped vane 2 descends, the helad arm 8b also descends halfway, but when the magnetic head 8a comes into contact with the disk 2, as shown in FIG. The head arm 8b is left behind as shown in FIG. Therefore, in this state, the magnetic head 8a presses the disk 2 due to the biasing force of the head pressure spring 9.

Next, the magnetic head 8a writes desired information to the disk 2 or reads information written to the disk 2. When writing and reading of all information is completed, the plant magnet 13 is deactivated. As a result, the L-shaped lever 12 rotates clockwise about the shaft 12b, and the lever 12d separates from the disk 2.

Also, since the L-shaped lever 12 lifts the helad arm 8b, the head assembly 8 rises and the magnetic head 8a separates from the disk 2. Next, the flat motor (not shown) is stopped to stop the disk 2.

Note that the head-up lever 1 is provided with an inclined portion 11c,
In addition, the L-shaped bar 12 is provided with an inclined portion 12a, and when the magnetic head 8a is lifted, each inclined surface becomes parallel to the disk 2, so even if the linear motor 10 moves the magnetic head 8a, it will not move up or down. The amount is constant. Furthermore, when the door 1 is opened even when the plunger magnet 13 is in operation, the head up lever 11 is lifted by the leaf spring 6 and the head arm 8b is lifted. Therefore, when the piano is opened, the magnetic head 8a always separates from the disk 2, making it impossible to read, write, or read data.

Since the L-shaped bar used in the present invention is simple in shape and has a short snorkel, it can be made of plastic as in the embodiment. Molding this plastic L-shaped lever reduces the number of processing steps, and unlike conventional iron levers, it does not transmit stain noise or magnetic noise, which has the advantage of reducing write and read errors. There is also.

As explained in detail above, according to the present invention, (1) the plunger magnet is placed outside the mounting range of the disk;

Since the disk drive is equipped with a gate, it is difficult for electrical noise and magnetic noise to be transmitted to the disk or magnetic head, thereby reducing write errors and read errors.

■ A plunger magnet is installed horizontally outside the mounting range of the disk, and this plunger magnet rotates an L-shaped bar to raise and lower the magnetic head, making the device as thin as the height of the plunger magnet. It becomes possible to do so.

There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view and a side view showing an embodiment of the present invention;
2 to 9 are views showing each element of the embodiment shown in FIG. 1, in which FIG. 2 is a perspective view of the door, FIG. 3 is a plan view and side view of the ejection bar, and FIG. A perspective view of the guide block, FIG. 5 is a plan view, front view, and side view of the head-up lever, FIG. 6 is a perspective view of the L-shaped lever, and FIG. 7 shows the embodiment shown in FIG. Fig. 8 is a directional view showing the embodiment shown in Fig. 1 cut along the B-B' plane, and Fig. 9 shows the lock lever. The figure shown,
Figures 10 and 11 are explanatory diagrams of the operation of the door opening/closing mechanism;
12 and 13 are explanatory diagrams of the operation of the disk ejection mechanism, FIG. 14 is an explanatory diagram of the operation of the disk clamp mechanism and head elevating mechanism, and FIG. 15 is an enlarged cross-sectional view of a partial cross section of the disk clamp mechanism. , FIG. 16 is a partial side view of the head elevating mechanism. 1...Door, 1m...Right side board, 1b...Left side board,
1c...Cam part, Nod...Lock bin, Noe...
Door spring, 2...Disk, 3...Ejection bar w1.9a...-Slide part, 3b...Hook part, 4
... Guide block, 4 & and 4b ... Guide body, 4c ... Guide groove, 4d ... Inclined block, 5.
... Clamp lever, 5a° ... Shaft, 5b ... Clange spring, 6 ... Leaf spring, 7 ... Collet, 8.
...Head assembly, 8a...Magnetic head, 8b.
...Door arm, 9...Head flare spring, 10...Linear motor, 11...Head up lever, 11a...Hole, 11b...Ejection portion, 11c...
... Inclined portion, 12... L-shaped bar, 12a... Inclined portion, 12b... Shaft, 12... Groove, 12d... Grad, 13... Plunger magnet, 14... ...Optical sensor, 15...Reset lever, 15a...1#I
5b... Reset wire, 16... Torsion spring, 17... Discharge spring, 18... Hub,
19...Lock lever, 19a, one hole, 19b, 1
9c, 19d and 19e...Stopper surface, 19f and 19g...Cam surface, 20...Coil spring. +9i 19 Figure 12

Claims (1)

[Claims] In floppy disk drives that write and read by moving the magnetic head and bringing it into contact with a desired position on the disk, there are two types of floppy disk drives: a plant magnet installed horizontally outside the disk mounting area, and a granja magnet with a sloped end. A floppy disk drive device comprising an L-shaped bar that is rotated by a magnet, and a head assembly that supports a magnetic head and has an arm that is supported by an inclined part of the L-shaped bar. .