JPH0896568A - Disk device - Google Patents

Abstract

PURPOSE: To improve data security by reducing the entering of dust into a drive unit with regard to a disk device for executing the recording/reproducing of information to a disk medium as a recording medium. CONSTITUTION: The drive unit 23 for executing the recording/reproducing to a miniature disk 22a stored in a cartridge 22 is covered with a lower internal cover 31a and an upper internal cover 31b and is fitted into a casing frame 41 via cushioning members 32a-32c. Further, a freely opening and closing shutter mechanism 34 is fitted to an opened section 33b for inserting the cartridge of the upper internal cover 31b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for recording / reproducing information on / from a disk medium as a recording medium.

[0002]

2. Description of the Related Art In recent years, when recording and reproducing information using a disk medium as a recording medium, FD (floppy disk), CD (compact disk), LD (laser disk), MO (magneto-optical disk), MD ( Mini disk) has been generalized. For example, an MD is a device for recording / reproducing information using light and a magnetic field, and a disk device is provided with an optical head for recording / reproducing, a magnetic head for recording, and various drive mechanisms.

Here, FIG. 9 shows an exploded view of a conventional mini disk device. Minidisc device 11 shown in FIG.
The drive unit 13 is mounted inside the housing frame 12, and the cover 14 is mounted on the housing frame 12.

The drive unit 13 includes a loading mechanism having a holder 13b for holding the disk cartridge 15 and a recording / reproducing mechanism having an optical head and a magnetic head for recording / reproducing on the unit frame 13a. The disk cartridge 15 has, for example, a 2.5-inch magneto-optical disk 15a built therein, and when loaded in the holder 13b, a part of the disk cartridge 15 is exposed in the radial direction by sliding the shutter 15b.

On the other hand, a front bezel 16 is attached to the front surface of the housing frame 12, and an insertion port 16a of the disk cartridge 15 and an eject button 16b are provided. A shutter 17 is provided at the insertion opening 16a so as to be rotatable in the insertion direction of the disc cartridge 15.

That is, when the disk cartridge 15 is inserted from the insertion opening 16a of the front bezel 16, the shutter 17 is pushed up and inserted into the holder 13b of the drive unit 13 to be loaded.

[0007]

By the way, since the optical disk devices such as the mini disk device 11 and the compact disk device described above are not susceptible to the influence of dust, no dust prevention measures are taken. The current situation.

However, a mini disk or a compact disk has been used as an external storage device of a computer or the like, and a severe error rate is required unlike the case of recording / reproducing music data or the like, and the conventional mini disk device 11 However, there is a problem that dust adheres to the disk 15a and the pickup lens of the optical head to reduce the error rate and data security.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a disk device for reducing the intrusion of dust into the drive unit and improving the data security.

[0010]

In order to solve the above problems, according to a first aspect of the present invention, in a disk device including a drive unit for performing recording / reproducing on a disk medium housed in a cartridge, the drive unit is covered to prevent dust. A first cover portion is provided to form a disk device.

According to a second aspect of the present invention, at the position where the cartridge is inserted into the drive unit in the first cover section according to the first aspect, shutter means that can be opened and closed according to the insertion of the cartridge is provided.

In claim 3, in claim 1 or 2,
The first cover portion that covers the drive unit is attached to a housing frame of the device.

In the fourth aspect, a shock absorbing cushioning member is interposed at a predetermined portion between the first cover portion and the housing frame.

[0014]

As described above, in the inventions of claims 1 and 3, the drive unit is appropriately covered by the first cover portion in the housing frame. As a result, the intrusion of dust into the drive unit that performs recording and reproduction on the disk medium is reduced, the error rate is improved, and the data security can be improved.

According to the second aspect of the invention, the shutter means that can be opened and closed is provided at the insertion portion of the cartridge of the first cover portion. As a result, further intrusion of dust is reduced when the shutter means is closed, and it is possible to improve data security.

According to the fourth aspect of the invention, the cushioning member is interposed at a predetermined portion between the first cover portion and the housing frame. As a result, the shock absorbing member absorbs the impact force against the impact, and it is possible to improve the error rate and data security.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an exploded view of an embodiment of the present invention. FIG. 1 shows a mini disk device 21 as a disk device.
It is a perspective view of the state which decomposed | disassembled. In FIG. 1, a mini disk device 21 is a mini disk of a magneto-optical disk (for example, a disk medium housed in a cartridge 22 (for example,
2.5 inch) 22a is provided with a drive unit 23 for recording and reproducing.

The drive unit 23 will be briefly described. A holder 25 for holding the cartridge 22 on the unit frame 24 and a slider 2 for moving the holder 25 up and down.
6a, 26b (26b is not shown in the figure), the cartridge 22 is pulled into the holder 25, and the sliders 26a, 26b
a loading mechanism 27 including a loading motor 27a for sliding b, a spindle motor (not shown) for rotating the mini disk, an optical head 28a for recording / reproducing, and a magnetic head 28b for recording. The carriage mechanism section (not shown in the figure) for moving in the radial direction of FIG.

The sliders 26a and 26b move in opposite directions to move the holder 25 up and down, and a link 26c that rotates about a central portion as a fulcrum is provided to ensure the up and down movement. Reference numeral 29 is a manual eject lever for manually ejecting the cartridge when the loading motor 27a fails.

In such a drive unit 23, when the cartridge 22 is inserted into the holder 25, the loading mechanism 27 pulls in the cartridge 22, and at this time, the cartridge shutter 22b of the cartridge 22 is opened to move the mini disk 22a in the radial direction. Show it up. In this case, the optical head 28a is located below the exposed portion of the mini disk 22a, and the magnetic head 28b is located above it.

The drive unit 23 is covered with an inner cover portion 31 which is a first cover portion composed of a lower inner cover 31a and an upper inner cover 31b. The lower inner cover 31a has a shape for accommodating the drive unit 23, and a step is appropriately formed corresponding to the components of the drive unit 23 and a housing frame and an eject switch described later. In addition, cushioning members 32a to 3 in which an elastic member such as rubber is formed in a cylindrical shape at a predetermined position on the outer surface of the lower inner cover 31a.
2c is provided.

The upper inner cover 31b is the lower inner cover 31.
a stepped protrusion 33a that forms an internal space corresponding to a and secures a space for vertical movement of the magnetic head 28b (support arm) of the drive unit 23, a connector of the drive unit 23, and a wiring cord. An opening portion for pulling out is formed by butting with the lower inner cover 31a.

Further, an opening portion 33b is formed on the front surface of the upper inner cover 31b corresponding to the attachment / detachment of the cartridge 22, and on both sides of the lower inner cover 31a so that a shutter mechanism 34 as a shutter means is arranged therein. Mounting part 3
3c (described in FIG. 5).

Here, FIG. 2 is an external view of the inner cover of FIG. 1, and FIG. 3 is a side sectional view of FIG. As shown in FIG. 2 and FIG. 3, the lower inner cover 31a and the upper inner cover 31b are butted with the drive unit 23 contained therein. In this case, as described above, the drive unit 2
There is only an opening for taking out the connector and the wiring cord of No. 3.

The opening 33b of the upper inner cover 31b is also provided.
The shutter mechanism 34 is attached to the attachment portion 33c of the lower inner cover 31a, and is urged downward by the spring 35. That is, the holder 25 in the drive unit 23 is located at the position of the shutter (described later) of the shutter mechanism 34.
The insertion part of the cartridge 22 corresponds to.

Therefore, referring back to FIG. 1, the housing frame 41 for accommodating the inner cover portion 31 enclosing the drive unit 23 is formed with an opening 42 corresponding to the stepped shape of the inner cover portion 31. , The cushioning member 3
Pins 43a to the positions (both sides) corresponding to 2a to 32c
43c is erected.

Further, the side plates 41a, 4 of the housing frame 41
1b includes, in addition to the inner cover portion 31, a control circuit board (for example, a microprocessor (MPU), a DSP (digital signal processor)) that controls recording / reproduction,
Electronic parts such as a read / write control circuit and a driver for each motor are mounted) and mounting portions 44a to 44c for mounting a power supply board are formed by cutting and raising. Also,
Engagement portions 45a and 45b that engage with a housing cover, which will be described later, are formed on the side plates 41a and 41b.
The attachment portion 46 for fixing the attachment portions 63a and 63b of the housing cover 61 to the portion bent to the back side by extension of
a and 46b are formed.

Further, a front bezel 51 as a front portion is attached to the front surface of the housing frame 41. The front bezel 51 has an insertion opening 52 for inserting the cartridge 22, and a hole 53 for exposing the manual eject lever 29. Further, an eject button 54 for automatically ejecting the cartridge 22 by the motor 27a is provided. The eject button 54 actuates an eject switch (not shown) provided on the housing frame 41, whereby the motor 27
drive a. The eject switch may be provided on the front bezel 51.

When accommodating the inner cover 31 which encloses the drive unit 23 in the housing frame 41, cushioning members 32a to 32c provided on the inner cover portion 31 are accommodated.
And pins 43a to 43c provided on the housing frame 41
Insert. That is, the shock absorbing members 32a to 32c are interposed between the housing frame 41 and the inner cover portion 31 and absorb the impact from the outside to thereby drive the drive unit 2
It is possible to avoid the influence on the data No. 3 and to improve the error rate in the device and guarantee the data. Further, by assembling in this way, the positioning of the inner cover 31 on the housing frame 41 becomes easy, and as a result, the assembling can be facilitated.

On the other hand, the housing cover 61 is the housing frame 4
1 for covering the three surfaces except the front bezel 51, the engaging portions 62a and 62b corresponding to the engaging portions 45a and 45b of the housing frame 41 are formed, and the mounting portions 46a and 46b of the housing frame 41 are formed. Corresponding mounting portions 63a and 63b are formed. Further, the opening 61 is formed in a portion corresponding to the step protrusion 33a of the upper inner cover 31b.
a is formed.

The housing cover 61 has the housing frame 41 in which the inner cover 31 is housed.
b, 62a, 62b are engaged to attach the mounting portions 46a, 46
b, 63a, 63b are attached by screws or the like.

Therefore, FIG. 4 shows a side sectional view of the mini disk device of the present invention. As shown in FIG. 4, the drive unit 23 is housed in the housing frame 41 and the housing cover 61 in a state of being covered with the inner cover portion 31. And
From the insertion opening 52 of the front bezel 51 to the cartridge 22
When is inserted, the shutter mechanism 34 is pushed to be in an open state, and the loading mechanism 27 of the drive unit 23 pulls it into the holder 25 for loading.

As described above, the drive unit 23 is covered by the inner cover portion 31 and the shutter mechanism 34, and it is possible to prevent dust from entering through portions other than the opening portion provided at a necessary portion. As a result, it is possible to reduce the adhesion of dust to the mini disk 22a and the optical head 28a, and it is possible to improve the error rate during reproduction and data security.

Next, FIG. 5 shows a block diagram of the shutter mechanism of FIG. 5A is a side view and FIG. 5B is FIG.
It is the front view seen from the A arrow direction of (A). Figure 5
The shutter mechanism 34 shown in (A) and (B) is composed of a shutter holder 71 and a shutter 72.

The shutter holder 71 is a cartridge 22.
In the width direction (in the minidisk device 21, the shutter 22b is inserted as a side portion in the insertion direction), the fan-shaped rotation support plates 74 are provided on both sides of the top plate 73 having an arc-shaped cross section.
a and 74b are formed, and the shutter 72 is provided on the back surface of the top plate 73.
A predetermined number (three in the figure) of protrusions 75a having tapered sides
~ 75c are formed. The rotation support plate 74
Holes 74a ₁ and 74b _{1 which} are rotatably fitted into the mounting portion 33c of the lower inner cover 31a are formed in the a and 74b.

Further, the top plate 73 has a rotation support plate 74.
Shutter holding plates 76a and 76b are formed inside the a and 74b at intervals longer than the width direction of the cartridge 22, and fulcrum pins 77a and 77b are formed on the shutter holding plates 76a and 76b. This fulcrum pin 77a,
The shutter 72 is rotatably attached to 77b. At this time, a spring 78 is attached to the pin 77a, and both ends of the spring 78 are engaged with the shutter 72 and the shutter holding plate 76a, so that the shutter 72 is always biased in the closing direction.

FIG. 6 is an enlarged side sectional view of the shutter mechanism of FIG. 5 attached to the inner cover. In FIG. 6, as described above, the holes 74a ₁ and 74b ₁ of the rotation support plates 74a and 74b are the mounting portions 3 of the lower inner cover 31a.
3c is rotatably fitted and a spring 35 is provided between one of the rotation support plates 74a and the lower inner cover 31a.

Therefore, the shutter mechanism 34 is biased toward the opening 33b side of the upper inner cover 31b by the spring 35, and the shutter 72 is moved by the spring 78.
It is urged to block 3b. As a result, the opening 33b side of the inner cover portion 31 is closed and dust is prevented from entering there.

Therefore, FIGS. 7 and 8 are explanatory views of the operation of the shutter mechanism of FIG. FIG. 7A shows a state before the cartridge 22 is inserted, and shows a state in which the shutter 72 closes the inner cover portion 31 by the two springs 35 and 78.

Then, as shown in FIG. 7B, when the cartridge 22 is inserted through the insertion opening 52 of the front bezel 51, the front end of the cartridge 72 pushes the shutter 72 inward so that the shutter 72 moves inward. Rotate. When the insertion of the cartridge 22 is continued, the shutter 72 remains in contact with the upper surface of the cartridge 22, and the tip of the cartridge 22 contacts the protrusions 75a to 75c.

The tip of the cartridge 22 has a protrusion 75a ...
When it abuts against 75c and is further pushed in, the protrusion 75a
The shutter holder 71 is attached to the mounting portion 33 with a tapered surface of ~ 75c.
Rotate inward (holder 25 side) with c as a fulcrum. When the rotation is completed, as shown in FIG. 8A, the tips of the protrusions 75 a to 75 c are in contact with the upper surface of the cartridge 22, and the tip of the shutter 72 is in contact with the upper surface of the cartridge 22. The contact is released, and the spring 78 rotates to the insertion opening side to return to the original state as shown in FIG. 7 (A).

The cartridge 22 is the drive unit 23.
When the cartridge 22 is inserted into the holder 25 to some extent, the motor 27a of the loading mechanism 27 operates to draw the cartridge 22 into the holder 25. FIG. 8A shows a state in which the cartridge 22 is loaded in the holder 25 to the final position (the position where the metallic hub at the center of the mini disk 22a in the cartridge 22 corresponds to the spindle shaft of the spindle motor).

Then, as shown in FIG. 8B, the sliders 26a and 26b in the drive unit 23 (see FIG.
(See) and the holder 25 descends by a predetermined amount.
By lowering the holder 25, the projection 7 of the shutter mechanism 34
The contact state between the tips of 5a to 75c and the upper surface of the cartridge 22 is released, whereby the shutter holder 71 returns to the original position shown in FIG. 7A by the restoring force of the spring 35.
When the holder 25 is lowered, the metallic hub at the center of the mini disk 22a is attracted to the spindle shaft having the magnetic force of the spindle motor, and the mini disk 22a is rotated by the rotation of the spindle motor.

In this way, the cartridge 22 becomes the holder 2
At the time point when the loading of the inside of the vehicle 5 is completed, the shutter 72 is in the state of closing the insertion opening 52 of the front bezel 51, that is, the state of closing the opening 33b of the inner cover 31. This means that even if the cartridge 22 is loaded, the opening 33b is closed and dust can be prevented from entering.

By the way, when the cartridge 22 is taken out, the eject button 54 of the front bezel 51 is pressed to rotate (reverse rotate) the motor 27a of the loading mechanism 27, or the ejecting operation of the means eject lever 29 causes the eject operation. When done, the holder 25 holding the cartridge 22 rises.

When the holder 25 moves up, the projections 75a to 75c of the shutter mechanism 34 and the rear end portion of the cartridge 22 come into contact with each other from the state shown in FIG. 8B, and when the holder 25 is further pushed up, the shutter holder 71 moves the mounting portion 33c. As a fulcrum, it rotates inward to reach the state shown in FIG. 8 (A). In this state, the unloading operation is performed by the loading mechanism 27, and the cartridge 22 is inserted into the insertion opening 5 of the front bezel 51.
It is in a state of protruding to 2. Then, when the cartridge 22 is pulled out, the shutter holder 71 of the shutter mechanism 34 is returned to its original position by the spring 35, and the state shown in FIG. 7A is obtained.

As described above, the shutter 72 in the shutter mechanism 34 is not limited to the case where the cartridge 22 is loaded, and also when the cartridge 22 is loaded.
This is what prevents the intrusion of dust, which in turn prevents the intrusion of dust, improves the error rate during reproduction, and improves data security.

In the above embodiment, the shutter 72 of the shutter mechanism 34 provided on the inner cover portion 31 has a structure in which it is closed even when the cartridge is loaded. However, the shutter rotates around the upper inner cover 31b via a spring. The mechanism may be such that it is movably provided and maintains a contact state with the upper surface of the cartridge 22 even when the cartridge 22 is loaded.

Further, the disk device of the present invention includes the case where it is constituted only by the drive unit 23, the internal cover portion 31 and the shutter mechanism 34 of the above-mentioned embodiment.

Further, although the above embodiment has been applied to the mini disk device 21, a device using a disk as a recording medium, such as a floppy disk device, a magnetic disk device, a compact disk device, an optical disk device and a laser disk device. Can be applied to.

[0051]

As described above, according to the first and third aspects of the present invention, the drive unit is appropriately placed in the housing frame as the first unit.
By covering the cover part, the invasion of dust into the drive unit for recording / reproducing with respect to the disk medium is reduced, the error rate is improved, and the data security can be improved.

According to the second aspect of the present invention, since the shutter means that can be opened and closed is provided at the insertion portion of the cartridge of the first cover portion, further invasion of dust is reduced when the shutter means is in the closed state, and data security is ensured. Can be improved.

According to the fourth aspect of the present invention, the cushioning member is interposed between the predetermined portion of the first cover portion and the housing frame, so that the cushioning member absorbs the impact force against the impact.
It is possible to improve the error rate and data security.

[Brief description of drawings]

FIG. 1 is an exploded configuration diagram of an embodiment of the present invention.

FIG. 2 is an external view of the inner cover of FIG.

FIG. 3 is a side sectional view of FIG.

FIG. 4 is a side sectional view of the mini disk device of the present invention.

FIG. 5 is a configuration diagram of a shutter mechanism of FIG.

FIG. 6 is an enlarged side sectional view of the shutter mechanism of FIG. 5 attached to an inner cover.

FIG. 7 is an operation explanatory diagram (1) of the shutter mechanism of FIG.

FIG. 8 is an operation explanatory diagram (2) of the shutter mechanism of FIG.

FIG. 9 is an exploded configuration diagram of a conventional mini disk device.

[Explanation of symbols]

 21 mini disk device 22 cartridge 22a mini disk 23 drive unit 24 unit frame 25 holders 26a, 26b slider 27 loading mechanism section 27a loading motor 28a optical head 28b magnetic head 31 inner cover section 31a lower inner cover 31b upper inner cover 32a to 32c cushioning member 34 Shutter Mechanism 35 Spring 41 Housing Frame 51 Front Bezel 52 Insertion Port 54 Eject Button 61 Housing Cover 71 Shutter Holder 72 Shutters 75a to 75c Projection 78 Spring

Front Page Continuation (72) Inventor Yoshinori Tanki 1601 Sakai, Atsugi, Kanagawa Mitsumi Electric Co., Ltd. Atsugi Plant

Claims (4)

[Claims] 1. A disc device including a drive unit for recording and reproducing a disc medium housed in a cartridge, wherein a first cover portion is provided to cover the drive unit and prevent dust from entering. . 2. The disk according to claim 1, further comprising a shutter means that is openable and closable in response to the insertion of the cartridge at a position where the cartridge is inserted into the drive unit in the first cover portion. apparatus. 3. The disk device according to claim 1, wherein the first cover portion that covers the drive unit is attached to a casing frame of the device. 4. A disk device, wherein a shock absorbing member is interposed at a predetermined portion between the first cover portion and the housing frame according to claim 3.