JP3982802B2 - Dust-proof mechanism of disk drive device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk drive device for recording or reproducing information on a disk, and more particularly to a dustproof mechanism thereof.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a loading structure for loading and unloading a disk in a disk drive apparatus that records or reproduces data on a disk such as a compact disk, for example, an insertion slot for inserting a disk into a front plate (front bezel) of the disk drive apparatus And a drive roller that rotates with the disc sandwiched between the insertion openings and conveys the disc by the rotational force of the drive roller. Such a structure is generally called a slot-in type loading mechanism and does not require large parts such as a tray, and is therefore often used particularly in an in-vehicle disk player.
[0003]
In such a loading structure, an elastic sheet mainly intended for dust prevention is provided so that dust or the like does not enter from the insertion port and affect data recording / reproduction. This elastic sheet is provided, for example, inside the insertion opening of the front bezel, and is fixed to the upper and lower portions by the fixing members with the insertion opening interposed therebetween (upper fixing portion, lower fixing portion). When the disk passes through the insertion slot, the elastic sheet is elastically bent and opened with the upper fixed portion and the lower fixed portion as pivots, and the disk is elastic. Passes in line contact with the sheet. In addition, after passing through the disk, the elastic sheet that has been bent and deformed returns to its original state and closes with the upper fixed portion and the lower fixed portion as pivots.
[0004]
[Problems to be solved by the invention]
As described above, in the conventional disk drive device, since the inserted disk passes through the elastic sheet in a line contact state when passing through the disk, a substantially uniform load (equally distributed load) is applied to the entire contact area, and a sliding scratch is applied to the disk recording surface. There is a problem that an error or the like occurs when data is recorded on and reproduced from the disk.
[0005]
Further, since the elastic deformation reaction force of the disk passage opening when the central portion (inner peripheral side) of the disk having the maximum contact width passes through the elastic sheet is large and the frictional force against the disk is maximum, the disk is transported. There were problems such as overloading the drive roller and hindering conveyance.
[0006]
The present invention has been made to solve the above-mentioned problems, and is a disk drive device in which a partial opening is appropriately formed in an elastic sheet to reduce dust-proof when passing through the disk and to reduce the contact pressure on the inner circumference side of the disk. It aims at realizing a dustproof mechanism.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the dust-proof mechanism of the disk drive device according to the present invention is provided with a disk insertion opening that is opened for loading or unloading a disk on one end surface of the housing, and shields the disk insertion opening. In the disk drive device provided with a dustproof sheet larger than the opening portion , at least one of the dustproof sheets is formed and arranged at a higher density with respect to the inner peripheral side of the disk to be loaded or discharged. It is characterized by having a notch portion formed at a position other than the region facing the opening portion of the disc insertion slot, which is formed with a low density in the outer peripheral side of the disc .
[0008]
With the above configuration, by providing a partial opening in the elastic sheet, the disk contact pressure of the elastic sheet is reduced from the outer peripheral side to the inner peripheral side of the inserted disk, protecting the recording surface of the disk and transporting the disk The load on the driving roller can be reduced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an appearance of a disk drive device according to an embodiment of the present invention.
In FIG. 1, reference numeral 20 denotes a housing, and a so-called slot-in type disk drive in which a disk insertion slot 3 is provided in the front bezel 2 in order to insert a disk into the housing 20. A device 50 is shown. In such a slot-in type loading mechanism, when a disc is ejected, the ejection operation is completed when a part of the disc is ejected from the disc drive device 50 so that the disc does not fall out of the disc insertion slot 3. Yes. When the disc is taken out, the operator holds the disc protruding from the disc insertion slot 3 by hand and pulls it out of the disc insertion slot 3. When the disc is loaded again, the operator manually removes the disc. By pushing into the disk insertion port 3, a switch (not shown) provided inside operates to rotate the drive roller, and the disk drive device 50 is pulled into the disk drive device 50.
[0010]
In the disk drive device 50, dust and dust floating in the air enter the housing 20 through the disk insertion slot 3 and adhere to the optical head and the disk, causing an error in data recording / reproduction. In order to prevent this, an elastic sheet (to be described later) for closing the disc insertion opening 3 is provided inside the front bezel 2 to provide a sealing property within the housing 20.
[0011]
2 is a cross-sectional view taken along line AA of the disk drive device of FIG. 1, and FIG. 3 is a plan view of the front bezel as viewed from the back side. 2 and 3 show a state in which no disc is inserted.
[0012]
As shown in FIG. 2, the elastic sheet 4 mainly for dust prevention is located on the back side (right side in the figure) of the disk insertion port 3 of the front bezel 2 and is arranged in the vertical direction in the figure. For example, it is comprised by the nonwoven fabric sheet etc. An upper fixing member 5 and a lower fixing member 6 for fixing the elastic sheet 4 are attached to the back side of the front bezel 2 (up and down position with the disc insertion opening 3 interposed). In this attachment method, an adhesive may be used, or a fixing support member such as a screw may be used. As a result, the elastic sheet 4 moves in a manner close to rotation with the upper fixing portion 5 and the lower fixing portion 6 as fulcrums. Here, the portion of the elastic sheet 4 fixed by the upper fixing member 5 and the lower fixing member 6 is a fixed end.
[0013]
Further, as shown in FIG. 3, the elastic sheet 4 is formed with a slit 7 longer than the diameter of the disk 1 in the central portion so that the disk 1 can be passed through the slit 7, and during loading of the disk 1 or When not being discharged, the slit 7 is closed by the elasticity of the elastic sheet 4 so that dust and dirt do not enter from the outside.
[0014]
Further, a plurality of partial openings 8 are formed in the elastic sheet 4 between the slits 7 and the fixed ends fixed to the upper fixing member 5 and the lower fixing member 6. The opening area is gradually increased over time. Thus, by forming the opening 8 partly as appropriate, the elastic sheet 4 is easily bent and deformed as the opening area increases, and the contact pressure on the recording surface of the disk 1 can be reduced. In addition to increasing the opening area, the arrangement density of the openings 8 to be formed may be gradually increased from the outer peripheral side to the inner peripheral side of the disk 1. (In the direction of the fixed end) may be formed at a position longer than the outer peripheral side of the disk 1 with respect to the inner peripheral side. Thereby, the disk contact pressure of the elastic sheet 4 can be gradually reduced from the outer peripheral side to the inner peripheral side of the insertion disk 1.
[0015]
Further, the opening 8 is provided at a position that does not cover the opening portion of the disc insertion opening 3, that is, a position other than the region of the elastic sheet 4 having the same range as the opening portion. This is to prevent dust and dirt entering from the disk insertion port 3 from directly entering the housing 20.
[0016]
Next, FIG. 4 shows a cross-sectional view taken along line AA of FIG. 1 during loading of the disc. FIG. 5 is a plan view of the state immediately after the disc has passed through the slit of the elastic sheet from the disc insertion opening, as seen from the back side of the front bezel, and FIG. 6 is a state in which the center portion of the disc passes through the slit of the elastic sheet. It is the top view which looked at from the back side of the front bezel.
[0017]
As shown in FIG. 4, the disk 1 is inserted from the disk insertion port 3 and is conveyed into the housing 20 by the drive roller 10 and the guide shaft 9. The elastic sheet 4 is elastically bent and deformed in the right direction in the drawing with the upper fixing portion 5 and the lower fixing portion 6 as fulcrums, and the central portion of the disk 1 is in line contact with the elastic sheet 4. It has become. In addition, the place where the elastic sheet 4 is bent and deformed and is in line contact with the disk 1 is almost equally distributed.
[0018]
Looking at the process of the disc 1 passing through the slit 7 (see FIG. 5 and FIG. 6), the opening gradually widens at the center of the slit 7 and the opening width is widest when passing through the central portion of the disc 1. It has become. Therefore, normally, the contact pressure with the slit 7 is minimized on the outer peripheral side of the disk 1, and the contact pressure is maximized on the inner peripheral side of the disk 1 (particularly, the central portion of the disk). Since the disk 1 passes through the slit 7 in this way, the load due to the bending reaction force of the elastic sheet 4 with respect to the disk 1 at the center of the disk 1 becomes large, and sliding damage to the disk recording surface is likely to occur. Furthermore, an excessive load is applied to the driving roller 10 and the conveyance is hindered.
[0019]
Therefore, in the present invention, as described above, the opening 8 is partially formed in the elastic sheet 4 as appropriate. By doing so, the contact pressure is always lower than the outer circumference side of the disk 1 in any insertion state so that the contact pressure of the elastic sheet 4 gradually decreases from the outer circumference side to the inner circumference side of the disk 1. As a result, it is possible to reduce the sliding scratches on the disk recording surface and the excessive load applied to the drive roller 10 and to realize a stable loading operation.
[0020]
In addition, this invention is not limited to the said embodiment, In the implementation stage, it can change variously in the range which does not deviate from the summary. For example, the shape of the partial opening 8 is a quadrangular shape, but it may be a round shape, a triangular shape, or the like, and the opening area can change the opening density depending on the location of the elastic sheet 4 to reduce the contact pressure to the disk. Any shape can be used as long as the change is realized. Further, as shown in FIG. 7, by changing the thickness of the elastic sheet 4 from the outer peripheral side to the inner peripheral side of the disk, the contact pressure on the outer peripheral side of the disk is increased and the contact pressure on the inner peripheral side is decreased. Even if it does, the same effect is acquired. Furthermore, although the embodiment describes the loading of the disc, the same effect can be obtained in the ejection of the disc.
[0021]
【The invention's effect】
As described above, since the contact pressure of the elastic sheet is maximized at the central portion of the disk, an opening is partially provided in the elastic sheet so that the elastic sheet is easily bent and deformed, and contact with the inner peripheral side of the disk. The pressure can be reduced, sliding scratches on the disk recording surface and excessive load applied to the drive roller can be reduced, and a stable loading operation can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a disk drive device according to an embodiment of the present invention.
2 is a cross-sectional view taken along line AA of the disk drive device of FIG.
FIG. 3 is a plan view seen from the back side of the front bezel.
4 is a cross-sectional view taken along the line AA of FIG. 1 during loading of the disc.
FIG. 5 is a plan view of the state immediately after the disc has passed through the slit of the elastic sheet from the disc insertion opening, as viewed from the back side of the front bezel.
FIG. 6 is a plan view of the state in which the center portion of the disk passes through the slit of the elastic sheet as viewed from the back side of the front bezel.
FIG. 7 is a diagram showing an elastic sheet according to another embodiment of the present invention, viewed from the upper side of the front bezel.
[Explanation of symbols]
1 Disc 2 Front Bezel 3 Disc Insertion Port 4 Elastic Sheet 5 Upper Fixing Member 6 Lower Fixing Member 7 Slit 8 Opening 9 Guide Shaft 10 Drive Roller 20 Housing 50 Disc Drive Device

Claims (3)

In a disk drive device provided with a disk insertion opening opened to load or eject a disk on one end surface of the housing, and having a dustproof sheet larger than the opening so as to shield the disk insertion opening,
At least one dustproof sheet is formed and formed with a high arrangement density with respect to the inner peripheral side of the disk to be loaded or discharged, and with a low arrangement density with respect to the outer peripheral side of the disk. dustproof mechanism of the disk drive apparatus characterized by having a notch formed at a position other than the region opposed to the opening portion. In a disk drive device provided with a disk insertion opening opened to load or eject a disk on one end surface of the housing, and having a dustproof sheet larger than the opening so as to shield the disk insertion opening,
At least one dustproof sheet is formed and has a large opening area with respect to the inner peripheral side of the disk to be loaded or discharged, and a small opening area with respect to the outer peripheral side of the disk. A dustproof mechanism for a disk drive device, comprising an opening formed at a position other than a region facing the opening . In a disk drive device provided with a disk insertion opening opened to load or eject a disk on one end surface of the housing, and having a dustproof sheet larger than the opening so as to shield the disk insertion opening,
The dustproof sheet has at least one slit longer than the diameter of the disk that is passed when loading or discharging, and the distance from the slit is longer than the outer peripheral side of the disk than the inner peripheral side. And a notch portion formed at a position other than a region facing the opening of the disc insertion slot .

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