JP3793046B2 - Optical disk device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc apparatus that performs recording / reproduction with respect to an optical disc such as a CD-ROM, a CD-R / RW, and a DVD-ROM.
[0002]
[Prior art]
With the rapid spread of PCs (personal computers) in recent years, development of optical disk devices of the type incorporated in portable PCs has been actively conducted. Such an optical disk apparatus is further reduced in weight and thickness, and today, the tray on which the optical disk is mounted is configured to be horizontal with respect to the cabinet, that is, along the direction of the surface of the disk mounted on the tray. What has been done is the mainstream.
[0003]
Here, an optical disk device adopting the above structure will be exemplified. FIG. 7 is a perspective view showing the optical disk device, FIG. 8 is a perspective view of a state in which a later-described drawer is ejected from the optical disk device in FIG. 7, and FIG. 9 is an exploded perspective view of the optical disk device in FIG. FIG.
[0004]
As shown in these drawings, an optical disk device 51 is mainly composed of a drawer 53 on which a disk recording / reproducing unit 52 for recording / reproducing an optical disk is mounted, and a metal cabinet 55 that can accommodate the drawer 53. It is configured.
[0005]
The drawer 53 can be inserted into and removed from the cabinet 55 in the directions of arrows X1-X2. That is, guide rails 56 and 57 having a U-shaped cross-section for guiding and supporting the drawer 53 are fixed to the inner walls on both sides of the cabinet 55. Further, slide rails 58 and 59 are slidably fixed to the guide rails 56 and 57, respectively. The drawer 53 is supported by the cabinet 55 in such a manner that the front end portions a1 and b1 of the guide projections 60 and 61 provided on both sides are fitted from the front end portions a2 and b2 of the slide rails 58 and 59, respectively.
[0006]
The drawer 53 optically records or reproduces an optical disk and an eject lock mechanism that locks / unlocks the drawer 53 accommodated in the cabinet 55, the resin tray 62 including the guide protrusions 60 and 61 described above, and the optical disk. The above-described disc recording / reproducing unit 52 and a metal drawer lid 63 that covers the disc recording / reproducing unit 52 so as to protect it from the outside.
[0007]
The disk recording / reproducing unit 52 includes a disk motor 64 that drives the optical disk, a pickup 65 that records and reproduces information by irradiating the optical disk with laser light, and a pickup feed that conveys the pickup 65 in the radial direction of the disk. The mechanism etc. are installed. Such a disk recording / reproducing unit 52 and the drawer lid 63 are fastened to the tray 62 by screws 66 via a floating mechanism (not shown).
[0008]
Further, the drawer 55 is discharged from the cabinet 55 in a state where the drawer 55 is slidably provided on the inner side surface 68 of the cabinet 55 and the drawer 53 is accommodated (inserted) into the cabinet 55. A spring 70 that applies a biasing force to the drawer discharge slider 69 and an engagement portion that engages with an eject lock mechanism of the drawer 53 to realize locking / unlocking of the drawer 53 into the cabinet 55 are provided. ing.
[0009]
When the eject lock mechanism is released, the pressure contact portion 71 at the tip of the drawer discharge slider 69 pushes the drawer discharge contact portion 72 provided on the tray 62 by the urging force of the coil spring 70, thereby causing the drawer 53 to move. Ejected from the cabinet 55.
[0010]
By the way, in such an optical disc apparatus 51, the ground spring 73 is attached to the outer surface of the drawer lid 63 (the surface facing the cabinet 55) by the screw 66 described above. The ground spring 73 makes the drawer lid 63 and the cabinet 55 conductively contact at least in a state where the drawer 53 is inserted into the cabinet 55. In other words, the earth spring 73 is a metal leaf spring having a bulged surface, which electrically contacts the bulged portion and the inner side surface 68 of the cabinet 55 to ground the disc recording / reproducing unit 52. It is a member for taking.
[0011]
More specifically, the drawer lid 63 attached to the resin tray 62 is in an electrically floating state with respect to the disk device main body when it is not grounded through the ground spring 73. Since the surface is relatively wide, it becomes a stagnant place of the pickup 65 or the radio wave and electromagnetic wave emitted from the outside of the disk recording / reproducing unit 52, which becomes noise and adversely affects the recording / reproducing performance.
[0012]
Further, similarly to the above, if the drawer lid 63 is not grounded, there is a risk that the laser diode or the like provided in the pickup 65 may be continuously damaged by electrostatic discharge due to electrostatic discharge from the outside (for example, a disk motor). is there.
[0013]
Therefore, in the optical disk apparatus 51 having such a structure, the drawer lid 63 covering the disk recording / reproducing unit 52 is grounded to the cabinet 55 via the dedicated ground spring 73.
[0014]
[Problems to be solved by the invention]
However, such an earth mechanism has the following problems.
That is, the drawer 53 including the drawer lid 63 is structured to be accommodated in the cabinet 55 via the guide rails 56 and 57 and the slide rails 58 and 59, so that there is a lot of so-called clearance play and the drawer 53 is attached to the drawer lid 63. The contact state between the earth spring 73 and the cabinet 55 was unstable.
[0015]
Further, the ground spring 73 slides with the cabinet 55 by the operation of inserting and removing the drawer 53 as the apparatus is used over a long period of time, in addition to the occurrence of variations in the molding dimensions of the bulging portion of the leaf spring. There is a problem in terms of durability and the like due to sag or shaving at the bulging portion of the leaf spring. That is, the ground spring 73 has an element that makes the contact state with the cabinet 55 unstable even in a single spring.
[0016]
Furthermore, the ground spring 73 is a dedicated component only for grounding, resulting in an increase in product cost. Therefore, there has been a demand for reducing such dedicated parts from the constituent parts of the optical disk apparatus.
[0017]
Therefore, the present invention has been made to solve the above problems, and can improve the connection reliability of a mechanism for grounding a disk recording / reproducing unit equipped with an optical pickup or the like with a simple configuration, In addition, the present invention provides an optical disc apparatus that can maintain the connection reliability of the earth mechanism for a long period of time.
[0018]
[Means for Solving the Problems]
In order to achieve the above object, an optical disc apparatus according to the present invention is a movable body that includes a housing and a disc recording / reproducing unit that can be inserted into and removed from the housing and performs recording or reproduction of the optical disc. A protective member provided on the movable body so as to cover the disc recording / reproducing unit, a slider member slidably provided on the casing, and at least the movable body inserted into the casing The urging member for applying an urging force for discharging the movable body from the inside of the housing to the slider member, and the slider member provided on the protection member and applied with the urging force by the urging member; And a conductive contact portion for grounding the disk recording / reproducing unit by conductive contact.
[0019]
The optical disk apparatus according to the present invention includes a housing provided with a protective member and a slider member for covering a disk recording / reproducing unit provided on a movable body for grounding a disk recording / reproducing unit on which an electrical component such as a pickup is mounted. The body is brought into conductive contact using an urging force for discharging the movable body from the housing.
[0020]
Therefore, according to the optical disk device of the present invention, the discharge force and stroke amount for discharging the movable body from the inside of the housing is a margin for maintaining the contact force and the contact state for conducting contact between the housing and the protective member. In this way, the connection reliability of the grounding mechanism for grounding the disk recording / reproducing unit can be improved, and the connection reliability of the grounding mechanism can be maintained for a long period of time. Can do.
[0021]
Further, in the optical disk device according to the present invention, the slider member and the protection member are members formed by processing a plate-like metal material, and the conductive contact portion is constituted by an end surface of the plate-like protection member. In addition, the conductive contact portion is in conductive contact with the end face of the plate-like slider member.
[0022]
The optical disk apparatus according to the present invention has an end face (edge) obtained by cutting the base material even when the surface of the base metal material constituting the slider member and the protection member is coated with, for example, plating for preventing corrosion or paint. Part), that is, the fracture surfaces where the metal parts of the base material are exposed are brought into conductive contact with each other, so that the connection reliability of the ground mechanism can be improved.
[0023]
Furthermore, the optical disc apparatus according to the present invention is characterized in that a taper is formed on an end surface of the conductive contact portion or the slider member in contact with the conductive contact portion.
According to the optical disk apparatus of the present invention, the end surface of the slider member or the conductive contact portion of the protection member slides through the taper and wears slightly due to the operation of inserting and removing the optical disk, that is, the operation of inserting and removing the movable body from the housing. Therefore, even if an oxide film or an oil film is formed on the end face of the slider member or the conductive contact portion of the protective member due to the use of the apparatus for a long period of time, the oxide film or the like is made minute through the taper. It can be peeled off at any time due to wear. Thereby, the connection reliability of the earth mechanism can be maintained for a long time.
[0024]
In the optical disk device of the present invention, the urging member is a coil spring.
In the optical disk apparatus according to the present invention, the discharge force of the movable body from the inside of the housing, that is, the contact force between the slider member and the conductive contact portion can be freely set by a coil spring that can generally reduce the spring constant. The design margin for ensuring contact between the housing provided with the protective member covering the disk recording / reproducing unit and the connection reliability of the ground mechanism can be improved. .
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a perspective view showing an optical disc apparatus to which the present invention is applied, FIG. 2 is a perspective view showing a state where an upper cabinet is removed from the optical disc apparatus of FIG. 1, and a state in which a drawer is ejected from the optical disc apparatus of FIG. FIG. 4 is an exploded perspective view of the optical disc apparatus shown in FIG.
[0026]
As shown in these drawings, this optical disc apparatus 1 is a thin-structured CD-R / RW drive or the like that can be mounted on a notebook PC, for example, for recording / reproducing an optical disc (not shown). The drawer 3 is mainly composed of a drawer 3 on which the disc recording / reproducing unit 2 is mounted, and a cabinet 5 which is a casing capable of housing the drawer 3.
[0027]
The cabinet 5 includes an upper cabinet 6 as an upper lid, and a lower cabinet 7 (hereinafter simply referred to as “cabinet 7”) provided with a loading / unloading mechanism or the like that allows the drawer 3 to be inserted and removed (inserted / removed) in the direction of the arrow X1-X2. For example).
[0028]
Guide rails 8 and 9 having a U-shaped cross-section for guiding and supporting the drawer 3 are fixed to the inner walls on both sides of the cabinet 7. Further, slide rails 10 and 11 are slidably fixed to the guide rails 8 and 9. The drawer 3 is supported by the cabinet 7 in such a manner that the front end portions a1 and b1 of the guide protrusions 12 and 14 provided on both sides are fitted from the front end portions a2 and b2 of the slide rails 10 and 11, respectively.
[0029]
The drawer 3 includes an eject lock mechanism 15 that locks / unlocks the drawer 3 accommodated in the cabinet 7, a resin tray 16 having the guide protrusions 12 and 14 described above, and recording or reproduction of an optical disk. The above-described disc recording / reproducing unit 2 that performs optical recording and a metal drawer lid 17 that covers the disc recording / reproducing unit 2 from the outside are provided.
[0030]
When the optical disk is recorded / reproduced, the eject lock mechanism 15 is locked when the drawer 3 is inserted all the way into the cabinet 7, while the lock state is released when the user presses the eject button 18.
A drawer lid 17 serving as a protective member covering the disk recording / reproducing unit 2 is formed by molding, for example, an aluminum plate material coated with a paint for preventing corrosion and scratches.
[0031]
The disc recording / reproducing unit 2 includes a disc motor 20 for driving an optical disc mounted on the disc chucking mechanism 19, a pickup 21 for recording / reproducing information by irradiating the optical disc with laser light, and this pickup 21. A pick-up feed mechanism for carrying the disc in the radial direction is mounted. Such a disc recording / reproducing unit 2 and the drawer lid 17 are fastened to the tray 16 by screws 22 via a floating mechanism (not shown).
[0032]
Here, the earthing mechanism provided in the optical disc apparatus 1 according to the present embodiment will be described.
This grounding mechanism makes the metal drawer lid 17 covering the disc recording / reproducing unit 2 and the metal cabinet 7 conductively contact at least in a state where the drawer 3 is inserted into the cabinet 7, thereby This is for grounding the disk recording / reproducing unit 2 on which the parts are mounted.
[0033]
That is, the cabinet 7 has a drawer discharge slider 26 which is slidably provided on the inner side surface 23 thereof through metal shafts 24 and 25 and is formed by processing a plate material obtained by subjecting a thin steel plate to corrosion resistance plating, In the state in which the drawer 3 is housed (inserted), the drawer discharge slider 26 is engaged with the notch 27 and the metal shaft 24 of the drawer discharge slider 26 and discharges the drawer 3 from the cabinet 7. And an engagement portion that engages with the eject lock mechanism 15 of the drawer 3 to realize locking / unlocking of the drawer 3 with respect to the inside of the cabinet 7.
[0034]
The coil spring 28 is compared with, for example, 0.025 N (Newton) when the drawer 3 is housed in the cabinet 7 so that the drawer 3 can be reliably ejected from the cabinet 7 via the drawer discharge slider 26. The spring load is set so as to exert a strong biasing force. On the other hand, the spring constant of the coil spring 28 is set as low as possible taking advantage of the structural characteristics of the coil spring.
[0035]
Here, in the state in which the drawer 3 is housed (inserted) into the cabinet 7, the drawer lid 17 is in conductive contact with the pressure contact portion 29 at the tip of the drawer discharge slider 26 to which a biasing force is applied by the coil spring 28. A contact portion 30 is provided.
[0036]
When the eject button 18 is pressed and the lock by the eject lock mechanism 15 is released, the pressure contact portion 29 at the tip of the drawer discharge slider 26 attaches the conductive contact portion 30 of the drawer lid 17 to the coil spring 28. The drawer 3 is ejected from the cabinet 7 by being pushed out by the force.
[0037]
Here, based on FIG. 5 and FIG. 6, the pressure contact portion 29 of the drawer discharge slider 26 and the conductive contact portion 30 of the drawer lid 17 will be described in detail. Each is provided on an end surface (edge portion) of each member. Moreover, the conductive contact portion 30 is formed in a tapered shape.
[0038]
As a result, although the surface of the drawer discharge slider 26 and the drawer lid 17 has been subjected to a coating treatment such as corrosion prevention or coating such as paint, an end face obtained by cutting these materials (base materials), that is, the base material Conductive contact can be made between the fracture surfaces where the metal portions are exposed.
[0039]
In addition, the operation of inserting / removing the optical disk, that is, the operation of inserting / removing the drawer 3 in the X1-X2 direction with respect to the cabinet 7 makes the conductive contact portion 29 of the drawer discharge slider 26 and the conductive contact portion 30 of the drawer lid 17 conductive. It slides through the taper of the part 30 and wears slightly.
[0040]
That is, even when an oxide film or an oil film is formed on the pressure contact portion 29 of the drawer discharge slider 26 or the conductive contact portion 30 of the drawer lid 17 by using the optical disc apparatus 1 for a long period of time, the oxide film or the like Can be peeled off at any time by minute wear through the taper. Thereby, the connection reliability of the earth mechanism can be maintained for a long time.
[0041]
As described above, the optical disc apparatus 1 according to the present embodiment uses the disc recording / reproducing unit 2 provided in the drawer 3 to ground the disc recording / reproducing unit 2 on which electrical components such as the pickup 21 are mounted. The drawer lid 17 to be covered and the cabinet 7 provided with the drawer discharge slider 26 can be brought into conductive contact by using an urging force for discharging the drawer 3 from the cabinet 7.
[0042]
Therefore, according to the optical disc apparatus 1 of the present embodiment, the urging force by the coil spring 28 for discharging the drawer 3 from the cabinet 7 and the stroke amount when the drawer 3 is discharged from the cabinet 7 are as follows. And the contact force for bringing the drawer lid 17 into conductive contact and the margin for maintaining the contact state are substantially replaced, respectively, and thereby the connection reliability of the ground mechanism for grounding the disk recording / reproducing unit 2 In addition, the connection reliability of the ground mechanism can be maintained over a long period of time.
[0043]
Although the present invention has been specifically described above by the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the case where the present invention is applied to a notebook PC-mounted CD-R / RW drive has been described. However, reproduction (or recording) of DVD, DVD-ROM, DVD-R / RW, MO, etc. The present invention can be applied to all types of optical disk drives that perform the above.
[0044]
【The invention's effect】
As described above, the optical disk apparatus of the present invention includes a protective member that covers a disk recording / reproducing unit provided on a movable body in order to ground a disk recording / reproducing unit on which an electrical component such as a pickup is mounted. The casing provided with the slider member can be brought into conductive contact by using an urging force for discharging the movable body from the casing. Therefore, according to the present invention, the discharge force and the stroke amount for discharging the movable body from the inside of the housing are substantially as a margin for maintaining the contact force and the contact state for bringing the housing and the protective member into conductive contact. As a result, the connection reliability of the ground mechanism for grounding the disk recording / reproducing unit can be improved, and the connection reliability of the ground mechanism can be maintained for a long period of time.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an optical disc apparatus according to an embodiment of the present invention.
2 is a perspective view showing a state in which an upper cabinet is removed from the optical disc apparatus of FIG. 1. FIG.
3 is a perspective view showing a state in which a drawer is ejected from the optical disc apparatus of FIG. 2; FIG.
4 is an exploded perspective view of the optical disc apparatus shown in FIG. 2. FIG.
5 is a perspective view showing in detail a state immediately before the pressure contact portion of the drawer discharge slider provided in the optical disc apparatus of FIG. 1 comes into contact with the conductive contact portion of the drawer lid. FIG.
6 is a plan view (as viewed in the direction of the arrow in FIG. 5) showing a state in which the pressure contact portion of the drawer discharge slider of FIG. 5 and the conductive contact portion of the drawer lid are in contact with each other.
FIG. 7 is a perspective view showing a conventional optical disc apparatus.
8 is a perspective view of a state in which a drawer is ejected from the optical disc apparatus of FIG. 7 as seen from a direction (back side) different from that in FIG. 7;
9 is an exploded perspective view showing the optical disk apparatus of FIG. 7. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Optical disc apparatus, 2 ... Disc recording / playback unit, 3 ... Drawer, 5 ... Cabinet, 6 ... Upper cabinet, 7 ... Lower cabinet, 16 ... Tray, 17 ... Drawer lid, 21 ... Pickup, 26 ... Drawer discharge Slider, 28 ... coil spring, 29 ... pressure contact part, 30 ... conductive contact part.

Claims (4)

A housing,
A movable body that is detachable with respect to the housing and is equipped with a disk recording / reproducing unit for recording or reproducing an optical disk;
A protective member provided on the movable body so as to cover the disk recording / reproducing unit;
A slider member slidably provided in the housing;
An urging member that applies an urging force to the slider member for discharging the movable body from within the housing, at least in a state where the movable body is inserted into the housing;
An optical disk apparatus comprising: a conductive contact portion provided on the protection member and conductively contacting the slider member applied with a biasing force by the biasing member to ground the disk recording / reproducing unit. . The optical disk apparatus according to claim 1, wherein
The slider member and the protection member are members formed by processing a plate-like metal material,
An optical disc apparatus characterized in that the conductive contact portion is constituted by an end surface of the plate-shaped protection member, and the conductive contact portion is in conductive contact with the end surface of the plate-shaped slider member. The optical disk apparatus according to claim 2, wherein
An optical disc apparatus characterized in that a taper is formed on an end surface of the slider member that contacts the conductive contact portion or the conductive contact portion. The optical disc apparatus according to any one of claims 1 to 3,
The optical disc apparatus, wherein the biasing member is a coil spring.

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