JPH0562323A - Disk driving device - Google Patents

Abstract

PURPOSE:To enable stable and lengthy ejection without stopping an engagement part of an ejection arm at a slant surface part of a disk cartridge. CONSTITUTION:A toggle spring 23 is provided between a cartridge holder 11 and the ejection arm 12 so as to make the force of the ejection arm 12 in the ejecting direction max. in a position where the engagement part 15 of the ejection arm 12 is brought into contact with the slant surface part 2a of the disk cartridge 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device, and more particularly to a disk drive device for inserting and removing a disk cartridge containing an information recording disk such as a magnetic disk in a hard case equipped with a shutter.

[0002]

2. Description of the Related Art A conventional magnetic disk drive of this type is a cartridge holder (hereinafter referred to as a holder) which is supported so as to be able to move up and down with respect to a chassis made of an aluminum alloy and holds the disk cartridge when it is inserted into the apparatus. Is abbreviated), a turntable for mounting the magnetic disk housed in the case of the disk cartridge, a spindle motor arranged on the bottom side of the chassis for rotationally driving the turntable, and a turntable on the turntable. An upper magnetic head and a lower magnetic head for writing / reading signals to / from both sides of a loaded magnetic disk, a hold case that holds the upper magnetic head at its free end and is rotatable, and a lower magnetic head. And a carriage that holds the carriage and supports the hold case in a rotating manner. And a stepping motor for transporting the radial direction is mainly configured.

The raising / lowering operation of the holder is performed by a known cam mechanism which is interlocked with the operation of the slide plate which is movable in the vertical direction. That is, when the disc cartridge is inserted all the way into the holder, the eject arm is locked by the lock lever with the shutter of the disc cartridge open, and at the same time, the slide plate is unlocked and the elastic force of the spring causes The slide plate moves to the cartridge insertion port side, and with this movement, the cam mechanism causes the holder to descend to the load position. When the eject button connected to the slide plate is pressed when the holder is in the load position, the cam mechanism raises the holder as the slide plate moves to the back side, and the lock lever and the eject arm move. Rotates and the disc cartridge moves to the cartridge insertion port side with the shutter closed and is ejected from the cartridge insertion port to the outside of the apparatus.

By the way, magnetic disks used in personal computers are generally classified into a 5.25 inch diameter floppy disk and a 3.5 inch diameter floppy disk. The former, which has a diameter of 5.25 inches, is housed in a flexible case, and the magnetic head directly enters from the head insertion port opened in advance to write and read signals. The 3.5 inch diameter one is stored in a hard case equipped with a shutter to open and close the head insertion port, and is handled as a so-called disc cartridge.

FIG. 4 is a bottom view of the disk cartridge 1, which is a hard case 2 having a substantially square shape in plan view, a magnetic disk 3 rotatably housed in the case 2, and a case 2. The shutter 4 is mounted on the tip of the magnetic disk drive in the insertion direction (arrow A direction) and is slidable in the direction orthogonal to the insertion direction (arrow B direction). A recess for positioning the pin of the eject arm is formed at the front edge of the case 2 in the insertion direction, and a sloped portion 2a and a locking step 2b for locking the pin with the shutter 4 opened are formed in this recess. Has been done. A window hole 5 for exposing a head insertion opening (not shown) of the case 2 is formed on both sides of the shutter 4 having a substantially U-shaped cross-section hoistway, and the shutter 4 is slid to move the head. The insertion opening can be opened and closed.

[0006]

By the way, this kind of magnetic disk drive device has a large discharge specification of the disk cartridge (e.g., 40 mm or more: long-length discharge) because of easy handling of the discharged disk cartridge. Called) is required.

During the eject operation, the pin 6 of the eject arm moves as shown in FIG. In FIG. 5A, reference characters A, B, C, D, and E indicate movement states of the pin 6 in the ejecting operation, position A is a locked state with the shutter 4 opened, and position B is an unlocked state. , The position C reaches the slope 2a, the position D is the end of the slope 2a, the position E is the ejection completed state, the pin 6 moves from the position A to the position E, and the disk is closed while the shutter 4 is closed. The cartridge is being ejected.

In this ejecting operation, the pin 6 slides in the concave portion at the tip of the insertion side of the case 2 as described above. During the course of this process, when the pin 6 passes through the sloped portion 2a, it comes into contact with the pin 6. Causes a component force Fb to reduce the component force Fa for ejecting the disk cartridge, and further increases the frictional force due to friction at the slope 2a.

FIG. 6 is an explanatory diagram showing changes in the moment of the eject arm. When the insertion of the disk cartridge 1 into the cartridge holder is completed, a tension spring (not shown) stretched between the hook of the eject arm and the cartridge holder. In (), the eject arm is locked while the discharge moment M2 is stored. Therefore, when the eject arm is unlocked when the disc cartridge 1 is ejected, in the state of the initial ejection moment M2,
The ejection arm pin 6 starts to eject the disc cartridge 1. In this case, as the eject arm rotates and ejects the disc cartridge, the tension spring loosens and the stored ejection moment decreases along the straight line L, and the ejection moment immediately before the completion of ejection. Becomes M1.

When the disc cartridge is pushed out and ejected in a long amount, it is necessary to control the ejection force by appropriately setting the spring force of the eject tension spring in order to prevent the disc cartridge from protruding in the horizontal state of the disc drive. There is. However, when the disc drive is used vertically, the weight of the disc cartridge is added, so that the ejection force is reduced, and a frictional force is generated between the inclined surface 2a of the disc cartridge and the pin 6 to increase. Then, the ejection of the disc cartridge is stopped at the slope 2a. Therefore, there is a drawback that a long-term ejection of the disc cartridge cannot be obtained. As described above, in the prior art, if the moment of M1 or M2 is increased in order to compensate for the frictional force of the sloped portion 2a of the disk cartridge whose ejection force decreases, the spring energy increases and the medium jumps out, so that both are satisfied. It was impossible to do.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in order to solve the problems. An object of the present invention is to prevent the disk cartridge from popping out even in vertical installation or horizontal installation, and to provide a sloped surface of the disk cartridge. It is an object of the present invention to provide a disk drive device in which ejection stop does not occur in a part.

[0012]

In order to achieve the above object, the present invention stores an information recording disk in a rigid case and urges it in a direction to close an opening exposing the information recording disk. A cartridge holder for holding a disk cartridge provided with a shutter,
An eject arm having an engaging portion that is urged in the ejecting direction, moves in the inserting / removing direction of the information recording disk, and moves in a direction orthogonal to the inserting / removing direction to open / close the shutter, and the eject arm in the ejecting direction. And a spring for urging the disc, and the eject arm moves in the ejecting direction to push out the disc cartridge by the ejecting operation, and the shutter in the open state is also moved in the closing direction. In the above configuration, an auxiliary spring that maximizes the force of the eject arm in the ejecting direction is provided at the position where the engaging portion of the eject arm contacts the sloped portion of the tip edge of the disc cartridge.

[0013]

By the above means, in the eject operation, when the engaging portion of the eject arm comes into contact with the sloped portion of the leading edge of the disc cartridge, the auxiliary spring exerts the maximum force in the ejecting direction of the disc cartridge. The engaging part of the eject arm does not increase the spring force of the spring and can overcome the slope of the tip edge of the disc cartridge, the disc cartridge does not stop during ejection, and the disc cartridge pops out. Not even.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Here, FIG. 1 is an explanatory plan view showing the structure of the main part of the embodiment, and FIG. 2 is a perspective view showing the structure of the main part of the embodiment.
FIG. 3 is an explanatory diagram of the disc cartridge ejecting operation of the embodiment.

In FIGS. 1 and 2, an eject arm 12 is rotatably supported by a support pin 13 on the top surface of a cartridge holder 11 for holding the disc cartridge 1 inserted in the apparatus. 12 is biased by a tension spring 14 stretched between the hooking piece 24 and the cartridge holder 11 in a counterclockwise direction, that is, a direction in which the inserted disk cartridge 1 is ejected.

An engaging hole 20 is formed in the eject arm 12, and a toggle spring 23 as an auxiliary spring is provided between the engaging hole 20 and the locking projection 21 of the cartridge holder 11.
Are stored in a stored manner. This toggle spring 23 changes the other end position of the toggle spring 23 locked in the engagement hole 20 as the eject arm 12 rotates, and the toggle spring 2
The force applied to the eject arm 12 by No. 3 changes, and when the engaging portion 15 of the eject arm 12 formed of, for example, a pin reaches the slope portion 2a of the disc cartridge 1, it becomes maximum.

The operation of the toggle spring 23 will be described. In FIG. 3, A is the center of the locking pin 13, R is the center of the locking projection 21, and a straight line A connecting these centers A and R
Let R. In FIG. 3, the position indicated by the solid line is the eject completion position (the state of FIG. 1), the position indicated by the two-dot chain line is the lock position with the shutter open, and the position indicated by the one-dot chain line (however, the toggle spring is shown. (23 only) is an intermediate position. Then, in the rotation range of the eject arm 12,
The engagement protrusion 21, the support pin 13, the engagement hole 20, and the like are set so that the lock position side is slightly across the straight line AR. The toggle spring 23 is in the most closed state in the lock position (the stored spring force is maximum),
Fully open at eject completion position (minimum spring force)
However, since the direction of the spring force F1 in the locked position is large with respect to the rotating direction of the eject arm 12, the component force of F1 acting in the rotating direction of the eject arm 12 is small, and , Which is on the right side of the straight line AR, acts as a force imparted to the eject arm 12 in the counterclockwise direction. When the eject arm 12 rotates clockwise to cross the straight line AR and reach the left side, the component force of F1 changes to the direction of rotating the eject arm 12 clockwise, and the component force of F1 gradually increases. .. But,
As described above, since F1 itself gradually decreases, a mountain-shaped curve is drawn as the component force. The top of this curve is aligned when the engaging portion 15 is on the slope 2a as described above. The configuration of the other parts of the embodiment is similar to that of the conventional disk drive device described above.

Next, the operation of the embodiment having such a configuration will be described.

When an eject button (not shown) is pushed in to unlock the eject arm 12, the eject arm 1
2 rotates to start the ejection operation of the disc cartridge 1. At this time, similarly to the conventional disk drive device, the shutter closing operation by the engaging portion 15 is also performed. Figure 3
6 is an explanatory view of the ejecting operation of the disc cartridge 1 of the eject arm 12, the eject arm 12 pivots in the direction of the arrow θ around the locking pin 13, and as the eject arm 12 pivots, the toggle spring 23 moves. Engagement hole 20
The locking position to the position moves in an arc around the point A.
First, at the start of the discharging operation shown in FIG. 3 (shown by a chain double-dashed line)
In, the toggle spring 23 is in the most closed state,
F1 of the toggle spring force 23 is applied to the eject arm 12 in the anti-discharging direction of the disc cartridge 1 by one end thereof. Then, when the eject arm 12 rotates clockwise, the direction of the component force of F1 across the straight line AR becomes the same as the rotating direction of the eject arm 12. Therefore, the ejection force obtained by adding the component force of the spring F1 by the toggle spring 223 to the spring force of the tension spring 14 in the ejection direction of the disc cartridge 1 acts on the ejection arm 12 to eject the disc cartridge 1. In this way, the rotation of the eject arm 12 progresses, and the engaging portion 15 becomes the inclined surface portion 2a of the leading edge of the disc cartridge 1.
When reaching the position in contact with, the component force of the spring force F of the toggle spring 23 becomes maximum as described above. Further, as already described with reference to FIG. 6, the spring force of the tension spring 14 in the ejecting direction of the disc cartridge 1 linearly decreases as the eject arm 12 rotates clockwise. The component force of F is applied as the ejection force of the eject arm 12, and the combined force is maximum at the position of the slope 2a. Therefore, the engaging portion 1 of the eject arm 12
No. 5 does not stop in the middle of the slope 2a,
It is possible to smoothly slide over the a and reach the position shown by the solid line in FIGS. 1 and 3 to complete the ejection.

According to the above-mentioned embodiment constructed as above,
With a simple structure in which the toggle spring 23 is simply attached, the eject arm 1 is attached to the inclined portion 2a of the disc cartridge 1.
At the position reached by the second engaging portion 15, the ejecting force by the eject arm 12 is maximized, and the disc cartridge 1 can be smoothly ejected without the engaging portion 15 stopping at the slope 2a. Become. In this case, the combined discharge force is set to be maximum at the position where the engaging portion 15 of the eject arm 12 slides on the slope 2a, and the discharge spring force of the tension spring 14 is increased overall. Since the disc cartridge 1 to be ejected is not ejected from the cartridge holder 11, the ejected disc cartridge 1 can be ejected stably for a long time. In this way, it is possible to provide a disk drive device that can stably discharge a long amount regardless of whether it is used horizontally or vertically at a low manufacturing cost by simply adding the toggle spring 23. .. Furthermore, by setting the attachment state of the toggle spring 23 so that the direction of the spring force of the toggle spring 23 is reversed at the lock position where the disc cartridge 1 is inserted, the spring force required for locking is reduced, and the lock mechanism Can be simplified and the device can be made more compact.

[0022]

As described above, according to the present invention,
Even if the disc cartridge is used vertically or horizontally, the eject arm engagement part does not stop at the slope of the tip edge of the disc cartridge during ejection operation, and the disc cartridge does not pop out, and the disc cartridge is securely ejected. It is possible to provide a disk drive device that is capable of discharging a large amount and is particularly effective for discharging a large amount.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing a configuration of a main part of an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a first half operation of ejecting a disc cartridge according to an embodiment of the present invention.

FIG. 4 is a bottom view of the disc cartridge.

FIG. 5 is an explanatory diagram showing a relationship between pins and a case in a conventional disk drive device.

FIG. 6 is a characteristic diagram of a tensile moment in a conventional disk drive device.

[Explanation of symbols]

 1 Disk Cartridge 2 Case 2a Slope 3 Magnetic Disk 11 Cartridge Holder 12 Eject Arm 13 Support Pin 15 Engagement Part 20 Engagement Hole 21 Engagement Projection 23 Toggle Spring 24 Hooking Piece

Claims (1)

[Claims] 1. A cartridge holder for holding a disc cartridge, which holds an information recording disc in a hard case and is provided with a shutter urged in a direction to close an opening exposing the information recording disc,
An eject arm having an engaging portion that is urged in the ejecting direction, moves in the inserting / removing direction of the information recording disk, and moves in a direction orthogonal to the inserting / removing direction to open / close the shutter, and the eject arm in the ejecting direction. And a spring for urging the disc, and the eject arm moves in the ejecting direction to push out the disc cartridge by the ejecting operation, and the shutter in the open state is also moved in the closing direction. In the above disc, there is provided an auxiliary spring for maximizing the force of the eject arm in the ejecting direction at a position where the engaging portion of the eject arm comes into contact with the slope portion of the tip edge of the disc cartridge. Drive.