JPS6319958Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flexible disk device, which closes the switch by opening the cover that protects the power switch, generates an eject signal, and releases the clamp of the clamp mechanism, which is necessary when the power is cut off. To provide a flexible disk device which has good operability by unclamping the disk without any problem and has no risk of destroying information on the disk.

A flexible disk cartridge (hereinafter abbreviated as ``disk''), which stores a flexible magnetic disk (media) in a container, is installed.
There is a flexible disk device that records and reproduces information signals by rotating a medium inside a container and bringing a magnetic head into contact with the rotating medium.

In a conventional flexible disk device, the disk is inserted into the device through the opening window, and then the cover (or handle) of the opening window is closed to fit the collet into the spindle hub, and the media is clamped by the collet and spindle hub. In use condition. In addition, by opening the lid (or handle), the collet is separated from the spindle hub to release the clamp, and then the disk is pulled out by hand. As described above, conventional flexible disk devices have had the disadvantage of poor operability since they require double-action operations to load and eject disks.

Therefore, the present applicant clamps the disk by automatically displacing the collet by detecting the insertion of the disk and fitting it into the spindle hub, and when the eject button is operated during clamping, the collet is automatically moved away from the spindle hub. We proposed a flexible disk device that releases the clamp. However, since the clamping mechanism of this device is electric, if the power is cut off while the disk is clamped, the disk cannot be unclamped and the disk cannot be removed. In addition, when the disk is clamped, the head is close to the media even if no access is being made, so if the power is cut off in this condition, noise may be supplied to the head and destroy the information on the disk. It was hot.

This invention solves the above problems,
One embodiment will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of an embodiment of the device of the present invention;
FIG. 2 shows a perspective view of the clamping mechanism of the device.

In FIG. 1, reference numeral 1 denotes an opening window, through which a flexible disk (not shown) containing a flexible magnetic disk (media) in a container is inserted into and ejected from the apparatus. Reference numeral 2 designates an eject button, and by pushing this button, an eject signal is generated and the disk is ejected. Further, 3 is an access indicator lamp, and 4 is a ready indicator lamp. The access indicator lamp 3 lights up when writing to or reading from the media, and the ready indicator lamp 4 lights up when the disk is correctly clamped and the media is not loaded. This lights up when the spindle motor that rotates the light is rotating at its rated speed. Also, 5
is a power switch that turns on and off the power. This power switch 5 is covered with a protective cover 6 which is normally closed to prevent erroneous operation, and when the power switch 5 is operated, the protective cover 6 is opened as shown in FIG. The protective cover 6 is provided with a momentary type push button switch (not shown) that closes only when pressed, and this push button switch opens and closes the protective cover 6 in conjunction with opening and closing of the protective cover 6. Close only occasionally.

In FIG. 2, 10 is a spindle hub, which is fixed to a rotating shaft 11 of a spindle motor and driven to rotate. Reference numeral 12 denotes a collet, which is rotatably attached to a collet shaft 13.
The collet shaft 13 has a flange 13a on its outer periphery fitted and fixed into a notch 14a of the shift lever 14, and is loosely inserted into the center of a guide pin 15 fixed to a frame (not shown). The shift lever 14 has a tapered portion 14b at the left end in the figure, is swingably supported by a rotating shaft 16 fixed to the frame, and is supported by a torsion coil spring (not shown) provided on the rotating shaft 16. ), the notch portion 14a is urged in the direction of separating from the spindle hub 10 (in the direction of arrow A). When the shift lever 14 rotates the notch 14a in the direction of arrow B, the collet 12 fits into the spindle hub 10 and rotates together with the spindle hub 10.

Reference numeral 17 denotes a solenoid plunger, which attracts and drives the plunger 17a in the direction of arrow C when energized.
A solenoid lever 1 is attached to the tip of the plunger 17a.
8 is fixed. This solenoid lever 18
is slidable in the directions of arrows C and D, is attracted and driven by the plunger 17a, and is normally at a position moved in the direction of arrow D by a coil spring 19 fixed to the frame. Solenoid lever 18
has an abutting portion 18a at the right end in the figure, a push projection 18b at the center, a stopper plate 18c at the left end, and bearings 18d and 18e at the left end. A stop lever 2 is attached to the bearing portions 18d and 18e.
A shaft 21 having a fixed position 0 is rotatably supported, and the stopper lever 20 is supported by a torsion coil spring 22.
The shaft 32 is urged to rotate in the direction of the arrow E and comes into contact with the shaft 32.

The clamp slider 23 is slidable in the directions of arrows C and D, and is normally positioned at a position moved in the direction of arrow D by a coil spring 24 fixed to the frame. The clamp slider 23 has an abutment part 23a and support parts 23b, 23c at the right end in the figure, a lock pin 25 projecting downward is fixed to the left end, and a roller 26 is fixed to the support parts 23b, 23c. is supported.

The lock lever 27 is rotatably supported by a pin 28, and is biased in the direction of arrow F by a torsion coil spring 33 so that an end 27a of the lock lever 27 abuts against the pin 29. This lock lever 27 is arranged at a position where it overlaps the lower side of the clamp slider 23 when the clamp slider 23 moves in the direction of arrow C, and has a hook portion 27b on the right side of the lock lever 27 in the figure.

The eject slider 30 is slidable in the directions of arrows C and D, and is normally at a position moved in the direction of arrow D by a coil spring 31 fixed to the frame. The eject slider 30 has a side wall 30a extending in its longitudinal direction. This side wall 30
A functions as a cam for the shaft 32, and is composed of a protrusion side wall 30a ₁ and a recess side wall 30a ₂ , and the recess side wall 30a ₂ has a notch 30b. Also,
The eject slider 30 has a stopper pawl 30c and a disk receiving portion 30d at the left end in the figure.

The head shift lever 34 has a substantially U-shape, and a through hole 34b is provided at the left end of the side 34a in the figure.
4c has a shift up pawl 34d. The head shift lever 34 is a shaft 3 fixed to the frame.
5, and is biased in the direction of arrow G by a torsion coil spring 36 provided on the shaft 35 to bring the side 34c into contact with the side wall 30a of the eject slider 30. The head arm 3 has a magnetic head 37 attached to the upper part of the side 34a.
No. 8 protrusions 38a are in contact with each other. Further, the disk sensor 39 is fixed to the frame and detects the through hole 34b.

The eject lever 40 has a shift down plate 40a extending to the left in the figure, a shift up plate 40b extending to the right, and a protrusion 40c, and is fixed to the end of the shaft 32. The shaft 32 has a large diameter portion 32
a and a small diameter portion 32b, this shaft 32
is movable and rotatable in the directions of arrows H and I, and is biased in the direction of arrow H by a torsion coil spring 42 provided on the large diameter portion 32a and having one end fixed to the support member 41. This eject lever 40 is biased in the direction of arrow L by a torsion coil spring 42.

When a disk is inserted through the opening window 1 shown in FIG. 1, the disk is inserted in the direction of arrow C in the plane between the spindle hub 10 and the collet 12 in FIG. In FIG. 2, the collet 12 to the support member 41 are all arranged above the plane formed by the spindle hub 10. The front edge of the disk shown by the two-dot chain line in FIG. 2 comes into contact with the disk receiving portion 30d, and the eject slider 30 is pushed by the disk and slides in the direction of arrow C. As the eject slide 30 slides, the side 34c of the head shift lever 34 engages with the notch 30b in the side wall 30a, the head shift lever 34 rotates in the direction of arrow G, and the head arm 38 moves in the direction of arrow B. Further, the through hole 34b moves to a position on the optical axis of the disk sensor 39, and the disk sensor 39 generates a detection signal.

The solenoid plunger 17 is energized for a predetermined period of time from when the disk sensor 39 starts generating the detection signal, and the plunger 17a is attracted. This causes the solenoid lever 18 to slide in the direction of arrow C. At this time, the tip of the small diameter portion 32b of the shaft 32 is facing the recess side wall _30a2 , but the stop lever 20 is located between the small diameter portion 32b and the large diameter portion 32 of the shaft 32.
Since the small diameter portion 32b is engaged with the stepped portion a, the tip of the small diameter portion 32b is spaced apart from the recess side wall _30a2 . By sliding the solenoid lever 18, the stop lever 20
slides on the shaft 32 in the direction of arrow C and separates from the stepped portion between the small diameter portion 32b and the large diameter portion 32a, and the shaft 32 moves in the direction of arrow H and touches the side edge of the push protrusion 18b of the solenoid lever 18. 18b ₁ is the protrusion 40
c from the direction of arrow I. At this time, the tip of the small diameter portion 32b of the shaft 32 faces the recess side wall 30a ₂ with a slight distance therebetween.

Further, the abutting portion 18a of the solenoid lever 18 abuts the abutting portion 23a of the clamp slider 23,
By pushing this, the clamp slider 23 slides in the direction of arrow C. Therefore, the roller 26 collides with the tapered portion 14b of the shift lever 14, the shift lever 14 rotates in the direction of arrow J, and the collet 12 moves in the direction of arrow B and engages with the spindle hub 10, moving away from the center of the disk. Clamp the media that peeks out. Further, as the clamp slider 23 slides, the lock pin 25 pushes the tapered portion 27c at the tip of the hook portion 27b of the lock lever, thereby locking the lock lever 27.
is rotated, and this lock pin 25 engages with the hook portion 27b.

After a predetermined period of time, when the energization to the solenoid plunger 17 is stopped, the solenoid lever 18 is activated by the coil spring 1.
9 to slide in the direction of arrow D. Therefore, the side edge 18b ₁ of the pushing projection 18b is separated from the projection 40c, the shaft 32 moves in the direction of arrow H, and the tip of the small diameter portion 32b comes into contact with the recess side wall 30a ₂ . At this time, the stop lever 20 slides up onto the large diameter portion 32a of the shaft 32 due to the tapered portion 20b at the tip of the stop lever 20. Further, the clamp slider 23 is locked to the lock lever 27, so that the media is continued to be clamped by the collet 12 and the spindle hub 10, and the flexible disk device becomes ready for use.

Next, when the access is completed, when the eject button 2 shown in the first figure is pressed, the solenoid plunger 17 is energized for a predetermined period of time and the plunger 17a is attracted. As a result, the solenoid lever 18 slides in the direction of arrow C, and the abutting portion 18a abuts the abutting portion 23a of the clamp slider 23.
And the stopper plate 18c is an eject slider 30.
The stopper claw 30c comes into contact with the stopper claw 30c. At this time, since the tip of the shaft 32 is in contact with the recess side wall 30a ₂ , the protrusion 1 is moved in response to the sliding of the solenoid lever 18.
The side edge 18b ₂ of the ejector lever 8b abuts the side edge 40c ₁ of the projection 40c of the eject lever 40. This causes the eject lever 40 to rotate in the direction of arrow K. As the eject lever 40 rotates, the shift down plate 40a pushes the lock lever 27 in the direction of arrow B, and the engagement between the hook portion 27b and the lock pin 25 is released. At the same time, the shift up plate 40b moves the shift up pawl 34d of the head shift lever 34 up to the arrow A.
side 34c of the head shift lever 34.
The fitting between the eject slider 30 and the notch 30b is released, and the head arm 38 moves in the direction of arrow A, and the head 37 is separated from the media.
Further, when the solenoid lever 18 slides in the direction of arrow C, the stop lever 20 slides on the shaft 32 and is separated from the shaft 32.

After a predetermined period of time, when the energization to the solenoid plunger 17 is stopped, the solenoid lever 18 is activated by the coil spring 1.
9 to slide in the direction of arrow D. At the same time, the clamp slider 23 is urged by the coil spring 24 and slides in the direction of arrow D, and the shift lever 14 is moved to the shaft 16.
It rotates in the direction opposite to the arrow J by a torsion coil spring installed in it. As a result, the collet 12 moves in the direction of arrow A and separates from the spindle hub 10, and the media is unclamped. Also,
The eject slider 30 slides in the direction of arrow D together with the solenoid lever 18 by the coil spring 31, and the disk receiving portion 30 of the eject slider 30 slides in the direction of arrow D.
d and the disk is slid and ejected. At this time, as the solenoid lever 18 slides, the stop lever 20 is lifted onto the large diameter portion 32a of the shaft 32 by the tapered portion 20b. At the same time, due to the sliding of the eject slider 30, the tip of the small diameter portion 32b of the shaft 32 comes into contact with the convex side wall 30a ₁ rather than the concave side wall 30a ₂ . Therefore, the shaft 32 moves in the direction of arrow I, and the stop lever 20 moves toward the large diameter portion 3.
2a and the small diameter portion 32b, and comes into contact with the small diameter portion 32b. The above operation completes the disk ejection operation and returns to the initial state before use.

FIG. 3 shows a block system diagram of one embodiment of the device of the present invention. In this figure, the same parts as in FIGS. 1 and 2 are given the same reference numerals. In FIG. 3, 45 is a push button switch linked to the eject button 2, which generates an H level signal and supplies it to the OR circuit 50 when the eject button 2 is pressed. In addition, 46 is the protective cover 6
This is a push button switch that is linked to the switch, and is opened when the protective cover 6 is opened to generate an H-level eject signal and supply it to the OR circuit 50. When an eject signal is supplied from the push button switch 45 or 46, the OR circuit 50 transfers this eject signal to the AND circuit 50.
Supply to 1.

As described above, when the disk is inserted and the side 34c of the head shift lever 34 is fitted into the notch 30b of the eject slider 30, the disk sensor 39 detects the through hole 34b and generates an H level detection signal. This detection signal is supplied to an AND circuit 51 and a monostable multivibrator (hereinafter referred to as "mono multi") 52. AND circuit 51
extracts the eject signal and supplies it to the OR circuit 53 only when the detection signal of the disk sensor 39 is at H level, that is, when the eject signal is received with the disk inserted.

Further, the monomulti 52 is triggered by the rising edge of the detection signal, generates a rising detection signal which becomes H level for a short time, and supplies it to the OR circuit 53. The eject signal from the AND circuit 51 and the rising detection signal from the monomulti 52 are supplied to the mono multi 54 via an OR circuit 53.

The monomulti 54 is triggered by the rising edge of the signal supplied from the OR circuit 53, generates a drive control signal that rises and remains at H level for a predetermined time, and supplies this to the drive circuit 55. The drive circuit 55 supplies a drive current to the solenoid plunger 17 and drives the solenoid plunger 17 only when the drive control signal is at H level. This causes the clamp mechanism to operate as described above.

Here, when the power is turned on, the protective cover 6 is opened and the power switch 5 is operated. When the protective cover 6 is opened, the push button switch 46 is closed and an eject signal is generated. However, when the power is turned on normally, the disk is not inserted yet.
AND circuit 51 blocks the eject signal from push button switch 46. After the power is turned on, the protective cover 6 is closed and the push button switch 46 is opened. After that, when the disk is inserted, a rising detection signal is generated by the detection signal of the disk sensor 39, and this causes the monomulti 54 to generate a drive control signal, and the solenoid plunger 17 is driven to clamp the disk. It is done.

After the use of the disk is finished, if the power is to be cut off while the disk is clamped, the protective cover 6 is opened and the power switch 5 is operated. When the protective cover 6 is opened, an eject signal is generated. At this time, since the disk sensor 39 is generating an H level detection signal, the above eject signal is sent to the OR circuit 50 and the AND circuit 5.
1. It is supplied to the monomulti 54 via the OR circuit 53, where a drive control signal is generated, the solenoid plunger 17 is driven, the disk clamp is released, the disk is ejected, and then the power is cut off.

Further, when the push button switch 45 generates an eject signal by operating the eject button 2 to release the disk clamp and then cut off the power, when the protective cover 6 is opened, the eject signal generated by the push button switch 46 is output to the AND circuit. 51 is blocked.

If an attempt is made to cut off the power with the disk clamped in this manner, the disk will automatically be unclamped and ejected. This improves operability, and since the power is cut off after the disk is ejected, the information stored on the disk is not destroyed. In addition, the protective cover can prevent erroneous operations such as turning off the power during use.

As mentioned above, the flexible disk device of the present invention has a clamp mechanism that clamps the disk when detecting insertion of the flexible disk and releases the disk clamp when an eject signal is supplied, and a cover that is normally closed and covers the power switch. The switch is closed when the cover is opened and generates an eject signal only when the cover is opened to release the clamp of the clamped disk.
Automatically clamps and unclamps the disk by generating insertion and ejection signals, and
When the power is cut off, the disk is automatically unclamped, providing good operability, and the power is cut off after the disk is always unclamped and ejected.
It has the advantage that there is no risk of information on the disk being destroyed by noise generated when the power is cut off.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of an embodiment of the device of the present invention;
FIG. 2 is a perspective view of an embodiment of the clamping mechanism of the apparatus shown in FIG. 1, and FIG. 3 is a block diagram of an embodiment of the apparatus of the present invention. 1... Opening window, 2... Eject button, 3... Access indicator lamp, 4... Ready indicator lamp, 5
...Power switch, 6...Protective cover, 10...
Spindle hub, 12... Collet, 14... Shift lever, 17... Solenoid plunger, 1
8... Solenoid lever, 19, 24, 31...
Coil spring, 20...Stop lever, 22,3
3, 36, 42...Torsion coil spring, 23...
Clamp slider, 25...Lock pin, 26...
...Roller, 27...Lock lever, 28, 29...
...Pin, 30...Eject slider, 32...
Shaft, 34...Head shift lever, 37...
...Magnetic head, 38...Head arm, 39...
Disk sensor, 40... Eject lever, 4
1...Support member, 45, 46...Push button switch,
50, 53...OR circuit, 51...AND circuit,
52, 54... Monostable multivibrator (mono multi), 55... Drive circuit.

Claims (1)

[Scope of utility model registration request] a clamping mechanism that clamps the flexible disk when detecting insertion of the disk and releases the clamp of the disk when an eject signal is supplied;
A flexible disk device comprising a switch that is closed by opening a cover that is normally closed and covers a power switch, and generates an eject signal only when the cover is opened to release the clamp of the disk being clamped.