JPH064962A - Recording medium replaceable magnetic disk drive - Google Patents

Abstract

(57) [Abstract] [Purpose] In a recording medium replaceable magnetic disk device having a shutter at a head disk access window provided in a storage compartment of a head arm assembly, when the shutter is closed due to malfunction or the like, the head is Prevents the head from colliding with and damaging the shutter when it attempts to access the disc. [Structure] The head arm assembly 18 has a shutter 2
A protrusion 28 that abuts the protrusion 1 is provided, and an elastic member 24 is provided at the portion of the shutter 21 that faces the protrusion 28. Further, an elastic member 25 is provided on a portion of the shutter 21 that is in contact with the head disk access window 20, and the roller 3 is provided on a portion where the cartridge tray 29 pushes the shutter open.
1 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium exchangeable magnetic disk drive having a shutter and a shutter opening / closing mechanism in a head disk access window of a storage of a head arm assembly.

[0002]

2. Description of the Related Art In a recording medium replaceable magnetic disk drive of the above-mentioned type, invasion of dust from the outside is prevented as a dustproof measure. It is known to take measures against the intrusion of dust from the outside on the front panel of the device (Japanese Utility Model Laid-Open No. 1-107094, Japanese Utility Model 1-).
42879). These increase the degree of sealing of the door provided on the front panel when the cartridge is not inserted, thereby preventing dust from entering the drive through the door. Further, it has already been proposed to provide a shutter on the head disk access window of the head arm assembly housing to protect the head from dust (Japanese Patent Publication No. 58-501881). An outline of a conventional recording medium exchangeable magnetic disk device will be described with reference to FIG.

In FIG. 6, a cartridge 2 having a disk 3 housed in a cartridge case 2a is inserted into a magnetic disk device 1, and a head 4 is arranged so that the head 4 is located at a small interval with respect to the disk 3 in the case 2a. There is.
The disk 3 is rotated by a spindle motor 6 mounted on the deck 5. A head arm assembly storage 7 is provided on the deck 5, and the head 4 extends toward the disk 3 through the head disk access window 8 and the cartridge head access window 2b of the cartridge case 2a. Reference numeral 9 is a magnet, and 10 is a voice coil motor (VCM).

The head 4 records or reads information while flying above the disk 3 at a height of a few microns. Therefore, it is important that dust is not attached to the head 4 and the disk 3 in order to prevent the head from crashing. There is no problem as long as the space containing the head 4 and the disk 3 is kept airtight, but in a device in which the disk 3, which is a recording medium, is housed in the cartridge case 2 and is made replaceable, dust-proof measures are taken. There must be. Particularly, in recent years, as the magnetic disk device has been increasing in capacity, the distance between the head 4 and the disk 3 has become smaller, so that it is necessary to take more thorough dustproof measures. .

In the conventional magnetic disk device, as described above, the disk 3 is housed in the cartridge case 2, the cartridge head access window 2b is provided in the portion of the cartridge case where the head 4 is accessed, and the cartridge 2 is installed in the device. When set to 1, the above window 2b
The device 1 is made to have an airtight structure. In particular,
A shutter is provided at a portion of the head disk access window 8 provided in the head arm assembly housing 7 of the drive to prevent dust from entering the head arm assembly housing 7 even when the cartridge 2 is not inserted, so that the head 4 is protected from dust. I try not to attach it.

[0006]

As described above, in the recording medium exchangeable magnetic disk drive having the shutter at the head disk access window provided in the head arm assembly housing, the shutter is closed due to malfunction or the like. If the head tries to access the disk while it is being recorded, the head may collide with the shutter and be damaged.

An object of the present invention is to prevent damage to the head.

A further object of the present invention is to increase the airtightness of the shutter, reduce friction when the shutter is opened, and reduce dust generation.

[0009]

According to the present invention, the above-mentioned problems are solved by providing the head arm assembly with a projection that abuts against the shutter.

Further, in order to solve the above-mentioned problems, the present invention proposes to provide an elastic member at a portion of the shutter to be brought into contact with the protrusion.

In order to solve the above-mentioned problems, the present invention proposes to provide an elastic member at the portion of the shutter which is in contact with the head disk access window.

Further, in order to solve the above-mentioned problems, the present invention proposes that the cartridge tray has a portion for pushing the shutter open, and the roller is attached to this portion.

[0013]

When the head arm assembly for supporting the head is provided with a protrusion and the head attempts to access the disk when the shutter is closed due to a malfunction or the like, the protrusion comes into contact with the shutter and therefore the head collides with the shutter. It is prevented from being damaged. An elastic member is provided on the shutter portion with which the protrusion abuts to reduce the impact when the protrusion abuts the shutter.

Further, by providing the elastic member in the portion of the shutter which is in contact with the head disk access window, the airtightness of the portion in which the head disk access window and the shutter are in contact with each other when the shutter is closed is improved.
Dust ingress into the hangar of the head arm assembly is greatly reduced.

Further, since the roller is provided at a portion of the cartridge tray that moves together with the cartridge when the cartridge is inserted to open the shutter, friction generated when the cartridge is inserted is reduced, and dust generated by the friction is reduced.

[0016]

Embodiments of the present invention shown in the drawings will be described below.

In FIG. 1, a cartridge case 11a of a cartridge 11 accommodates a disk 12 which is a recording medium and has a cartridge head access window 11b. The recording medium exchangeable magnetic disk device 13 into which the cartridge 11 is to be inserted has a disk driving spindle motor 15 and a head arm assembly housing 16 arranged on a deck 14 thereof. As described with reference to FIG. 6, a head 17 and a head arm assembly 18 supporting the head 17 are provided in the head arm assembly housing 16, and a voice coil motor 19 for driving the head arm assembly 18 and the like are provided. It is installed. Voice coil motor 19
Are mounted on the deck 14. Reference numeral 20 is a head disk access window.

The cartridge 11 is replaced by the magnetic disk device 13
The cartridge head access window 11b of the cartridge case 11a begins to open when it is inserted into the cartridge, and when the setting of the cartridge is completed, the window is completely opened.
At the end of this setting, the center of the disk 12 housed in the cartridge case 11a is interlocked with the central axis of the spindle motor 15, so that the disk 12 can be rotationally driven.

The head arm assembly 18 is driven in the radial direction of the disk 12 by a voice coil motor 19. In this case, the head 17 floats above the surface of the disk 12 at a height of about 0.2 μm, and the head 12 is moved to the disk 12. Access and read / write information.

In FIG. 2, a door-type shutter 21 is pivotally attached to an abutment 22 fixed to the deck 14 inside a head disk access window 20 of the head arm assembly housing 16 (on the side of the head arm assembly), and a spring 23 is used. It is biased to close the window 20. The shutter 21 is provided with a small range of elastic members 24 on its head arm assembly side and a wide range of elastic members 25 on the opposite side in contact with the window 20. The cover 26 is attached to the head arm assembly housing 16 from above by several screws 27, and in this case, the head disk access window 20 is formed. The window 20 is closed by a shutter 21 when the cartridge 11 is not inserted.

As described above, the head arm assembly 18 provided in the storage 16 of the head arm assembly is provided with the projections 28 for supporting the head 17 and pointing the shutter 21 and acting as a head protector. When the head 17 tries to access the disk due to a malfunction or the like while the shutter 21 is still closed, the protrusion 28 comes into contact with the elastic member 24 of the shutter 21 as shown in FIG. Prevent.

In the space where the spindle motor 15 of the magnetic disk device 13 is located, a cartridge tray 29 is arranged so as to be movable toward the head 17 or in the opposite direction,
The spring 30 provides the habit of moving toward the head 17. The cartridge tray 29 includes a portion 29a that abuts the shutter 21, and a roller 31 is attached to the portion 29a. During the contact, the roller 31 directly contacts the shutter 21. A guide 32 for the cartridge tray 29 is arranged on the deck 14 in the space. 33
Is the eject button.

When the cartridge 11 is inserted into the magnetic disk device 13 from the non-inserted state shown in FIG. 4, the cartridge sensor 34 is pushed, and then the cartridge tray 29.
Is guided by the guide 32 by the action of the spring 30 and pulled toward the head 17. At this time, the roller 31 of the portion 29a provided on the cartridge tray 29 abuts against the shutter 21 and pushes it, and the shutter 21 falls down toward the head arm assembly 18 side to open the head disk access window 20 as shown in FIG. Open. Subsequent reading and writing of information is the same as in the case of FIG.

When ejecting the cartridge 11, the eject button 33 is pushed. As a result, the lever 35 rotates about its fulcrum, and the cartridge tray 29 is pulled in the direction opposite to the head 17 side via the pin 29b engaging with the arm of the lever 35, and therefore the shutter 21 is pushed open. Since the portion 29a is retracted, the shutter 21 closes the head disk access window 20 by the action of the spring 23.

[0025]

According to the first aspect of the present invention, when the head tries to access the disk due to a malfunction or the like while the shutter is closed, the projection provided on the head arm assembly abuts on the shutter, so that the head is shuttered. It is possible to prevent the head from being damaged and prevent the head from being damaged.

According to the structure of claim 2, the impact when the projection contacts the shutter is mitigated, and the effect of the structure of claim 1 can be further enhanced.

According to the third aspect of the present invention, the airtightness between the head disk access window and the portion in contact with the shutter is improved when the shutter is closed, and the entry of dust into the storage of the head arm assembly is greatly reduced. Can be made.

According to the fourth aspect of the invention, since the roller is provided at the portion where the shutter provided on the cartridge tray is pushed open, the friction generated when the cartridge is inserted is reduced, and the dust generated by the friction is greatly reduced. You can

[Brief description of drawings]

FIG. 1 is a perspective view of a recording medium exchangeable magnetic disk device according to the present invention when a cartridge is not inserted;
The cartridge tray and others are abbreviated.

FIG. 2 is an exploded perspective view of the magnetic disk device.

FIG. 3 is an explanatory view showing a contact state between a projection provided on a head arm assembly and a shutter.

FIG. 4 is a cross-sectional view of the magnetic disk device when a cartridge is not inserted.

FIG. 5 is a cross-sectional view of the magnetic disk device when a cartridge is inserted.

FIG. 6 is a cross-sectional view of a conventional magnetic disk device.

[Explanation of symbols]

 11 cartridge 12 disk 13 recording medium exchangeable magnetic disk device 16 head arm assembly hangar 17 head 18 head arm assembly 20 head disk access window 21 shutter 24 small range elastic member 25 wide range elastic member 28 protrusion 29 cartridge tray 29a Contact area 31 Roller

Claims (4)

[Claims] 1. In a recording medium exchangeable magnetic disk apparatus having a shutter and a mechanism for opening and closing the shutter, a head arm assembly is provided with a protrusion for abutting the shutter in a head disk access window of a storage of the head arm assembly. Characteristic magnetic disk device. 2. The magnetic disk device according to claim 1, wherein an elastic member is provided on a portion of the shutter that should come into contact with the protrusion. 3. In a recording medium replaceable magnetic disk device having a shutter and a shutter opening / closing mechanism in a head disk access window of a head arm assembly hangar, an elastic member is provided at a portion of the shutter in contact with the head disk access window. A magnetic disk device characterized by being provided. 4. A recording medium replaceable magnetic disk device having a shutter and an opening / closing mechanism for the shutter in a head disk access window of a head arm assembly hangar, and further having a cartridge tray that moves together with the cartridge when the cartridge is inserted. The magnetic disk device, wherein the cartridge tray has a portion for pushing the shutter open, and a roller is provided at this portion.