The present application claims priority from Japanese patent application serial no. JP 2008-217005, filed on Aug. 26, 2008, the content of which is hereby incorporated by reference into this application.
1. Field of the Invention
The present invention relates to an optical disc drive in particular to an optical disc drive that can reduce the deformation of a mechanical part caused by external vibration and impact.
2. Description of the Related Art
In the case of an optical disc drive mounted on a mobile PC (Personal Computer), a DVD (Digital Versatile Disc) camera/recorder, a BD (Blu-ray Disc) camera/recorder, or the like, the reduction of the thickness and the weight is advancing in recent years. This is a requirement necessary for securing convenient portability but at the same time insufficient strength thereof is a problem when external vibration or impact is imposed. When a mechanical part deforms in particular, drive performance including track tracing capability on an optical disc is greatly affected.
In order to solve the problem, a means for reducing the thickness of a device without deteriorating resistance to vibration and impact by installing an attachment having an insulator onto a record reproduction unit is disclosed in Japanese Patent Application Laid-Open Publication No. 2006-134543.
Further, a means for attenuating vibration by installing an elastic stopper onto a mechanical unit including an optical pickup so that the stopper may hit a case when vibration occurs in excess of a prescribed stroke is disclosed in Japanese Utility Model Application Laid-Open Publication No. H5-36695.
As shown in Japanese Patent Application Laid-Open Publication No. 2006-134543 and Japanese Utility Model Application Laid-Open Publication No. H5-36695, resistance to vibration and impact has been secured by adding a part such as an attachment having an insulator or an elastic stopper in the past. In order to further promote the reduction of thickness and weight hereafter, a method for securing performance without the addition of another part is required.
An object of the present invention is to solve the problem and provide an optical disc drive that can secure resistance to vibration and impact in particular an optical disc drive that can secure resistance to vibration and impact without the addition of another part.
An optical disc drive according to the present invention to attain the above object: is the optical disc drive having a disc motor to rotate an optical disc, a disc tray that is installed on the optical disc mounting side of the disc motor and transfers the optical disc from the exterior to the interior or from the interior to the exterior of the drive when the optical disc is attached to or detached from the device, and a traverse that is placed between the disc tray and the disc motor and supports the disc motor, wherein a flange is formed at the periphery of the traverse to face the bottom face of the disc tray.
Further, another optical disc drive according to the present invention is the optical disc drive having a disc motor to rotate an optical disc, a disc tray that is installed on the optical disc mounting side of the disc motor and transfers the optical disc from the exterior to the interior or from the interior to the exterior of the drive when the optical disc is attached to or detached from the device, a traverse that is placed between the disc tray and the disc motor and supports the disc motor, and a traverse cover that is attached to the traverse and is used for covering the disc tray side of the traverse, wherein a flange is formed at the periphery of the traverse cover to face the bottom face of the disc tray.
According to the present invention, an optical disc drive capable of securing resistance to vibration and impact is provided, and an optical disc drive causing less track trace failure during operation and having good usability is provided.
These and other features, objects and advantages of the present invention will become more apparent from the following description when taken in conjunction with the accompanying drawings wherein:
Embodiments of the present invention are hereunder explained in reference to the drawings.
The disc motor 101 is attached to the traverse 100 with retainers 102a, 102b, and 102c such as, for example, ordinary screws. That is, the disc motor 101 is supported at three points in a cantilevered manner and, when vibration or impact is imposed from the exterior of the device, it sometimes happens that slump moment occurs and the TRV mechanism 1 itself deforms and transfers in some cases.
The optical pickup unit (hereunder abbreviated as OPU) 103 records and reproduces signals at an indicated position on the optical disc by transferring on a guide main shaft 107 and a guide layer shaft 108 in accordance with the rotation of a slide motor 104, a screw 105 directly connected to the axis of rotation thereof, and a gear 106.
Although the slump moment can be avoided if the disc motor 101 can be supported at four points, the lower side of the disc motor 101 in the figure is used as a space for the transfer of the OPU 103 as shown in
Here, the traverse 100 is attached to a bottom case not shown in the figure through dampers 109a, 109b, and 109c at three points, the dampers being made of rubber or the like.
A feature of the present embodiment is, as shown in
Successively, the state where impact is actually imposed is explained with
The case where impact is imposed from the bottom face side of the disc motor 101 as shown with the arrow in the figure is discussed. As stated above, the disc motor 101 is supported on the traverse 100 at three points in a cantilevered manner. As a result, slump moment is caused by impact force, the TRV mechanism is drawn to the upper face side (to the left side in
Successively, the position and the role of the protrusion 120a are explained in reference to
The protrusion 120a faces a part of the bottom face of the disc tray 130 located on the backside in
Successively, another embodiment according to the present invention is explained in reference to
A counterpart facing the protrusion 120a or 140a and being brought into contact with it when vibration or impact is imposed is not necessarily limited to the disc tray 130. In an optical disc drive having a disc tray 130 however, the easiest way is in most cases that the protrusion 120a or 140a is formed so as to face the disc tray 130 that is the counterpart facing the TRV mechanism 1 at a large area.
The present invention is not limited to the aforementioned embodiments. Any means may be included in the present invention as long as it can prevent a TRV mechanism 1 from largely transferring and deforming by impact.
For example, although the protrusion 120a formed at the skirt 120 of the traverse 100 is narrower in width than the protrusion 140a formed at the traverse cover 140 in the figures, this is not a limiting condition. The protrusion 120a may be formed widely in the direction of the periphery of the traverse 100 or the protrusion 140a may be formed more narrowly in the direction of the periphery of the traverse cover 140 than the protrusion shown in the figure. Further, the number of the flange is not limited to one and plural flanges may be formed at the periphery of the traverse 100 or the traverse cover 140. Various modified examples can be accepted as long as the protrusion 120a or 140a does not interfere with other constituent elements in ordinary operations.
While we have shown and described several embodiments in accordance with our invention, it should be understood that disclosed embodiments are susceptible of changes and modifications without departing from the scope of the invention. Therefore, we do not intend to be bound by the details shown and described herein but intend to cover all such changes and modifications that fall within the ambit of the appended claims.
Number | Date | Country | Kind |
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2008-217005 | Aug 2008 | JP | national |