JP2004087005A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an electromagnetic field radiated inside a device main body from leaking to the outside in an optical disk device. <P>SOLUTION: In the optical disk device, a shield sheet metal 83 is arranged on surfaces of a fixed part 81 and a coupling rod 82 of a tray linkage plate 8, the shield sheet metal 83 is grounded electrically to a mechanical chassis 1. The fixed part 81 and the shield sheet metal 83 are tilted depending on a radiation direction of the electromagnetic field radiated inside the device main body. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical disk device, and in particular, to an optical disk device for reproducing and / or recording an optical disk such as a CD and a DVD.
[0002]
[Prior art]
An optical disk device that prevents an electromagnetic field from leaking from the inside of the optical disk device to the outside is described in, for example, Japanese Patent Application Laid-Open No. 8-7431. This optical disk device includes a grounding conductor 8 as shown in FIG. The grounding conductor 8 is connected to the control circuit board 7 via the wiring 7a. A grounding leaf spring 9 for buffering and relaxing the tray 4 to smoothly stop the movement of the tray 4 is disposed on the chassis 6, and the grounding leaf spring 9 is electrically grounded to the chassis 6.
[0003]
In this optical disk device, when the tray 4 is housed inside the chassis 6, the grounding conductor 8 contacts the grounding leaf spring 9 and reduces the electromagnetic field radiated from the control circuit board 7 of the tray 4.
[0004]
[Problems to be solved by the invention]
In the optical disc device described in the above publication, the electromagnetic field generated from the control circuit board 7 of the tray 4 is reduced, but the electromagnetic field radiated by driving the optical pickup and the electromagnetic field radiated by driving the tray 4 are reduced. It may leak to the outside.
Another object of the present invention is to prevent an electromagnetic field radiated inside the device main body from leaking to the outside in the optical disk device.
[0005]
[Means for Solving the Problems]
An optical disc device according to a first aspect of the present invention is capable of moving between an apparatus main body, a take-out position arranged outside the apparatus main body, and a reading position housed inside the apparatus main body, and for mounting an optical disc. A tray, a table arranged below the tray inside the apparatus main body, a clamper arranged inside the apparatus main body, which holds the optical disk together with the table when the tray is in the reading position, and a tray driving gear for driving the tray The optical disc device having the following features.
[0006]
That is, the tray driving gear is provided with a clamper elevating unit having different height portions. A support shaft for supporting the clamper body in a vertically rotatable manner near a rear end thereof; a clamp spring disposed adjacent to the support shaft for urging the clamper body downward; A tray interlock having a U-shaped portion for sandwiching and fixing the tray on the rear side adjacent to the lid portion, and a shield sheet metal disposed at least on the surface of the U-shaped portion, wherein the shield sheet metal is electrically grounded to the apparatus main body. A plate; and a projection that comes into contact with the upper surface of the clamper elevating unit.
[0007]
In this optical disk apparatus, when the tray moves to the take-out position, the clamper moves upward by moving the protrusion to a higher position of the clamper elevating unit, thereby releasing the clamping of the optical disk, and the tray of the U-shaped part. Release the fixation. Further, when the tray moves to the reading position, the protrusion moves to a lower position of the clamper elevating unit, so that the clamper moves downward to clamp the optical disc and fix the tray by the U-shaped part. Further, the electromagnetic field radiated inside the apparatus main body by the tray interlocking plate is prevented from leaking outside.
[0008]
According to this optical disk device, since the shield sheet metal is disposed on the surface of the U-shaped portion for fixing the tray on the front panel side, the electromagnetic field radiated inside the device main body can be prevented from leaking to the outside.
Further, since the front panel side of the tray is sandwiched and fixed between the U-shaped portions, there is no gap between the tray and the clamper, and the electromagnetic field radiated inside the apparatus main body can be effectively prevented from leaking to the outside.
[0009]
Further, since the shield sheet metal is electrically grounded to the apparatus main body, the electromagnetic field radiated inside the apparatus main body can be more effectively prevented from leaking to the outside.
An optical disc device according to a second aspect of the present invention is the optical disc device according to the first aspect, wherein the U-shaped portion is formed so as to be inclined with respect to the tray when fixing the tray. According to this optical disc device, the inclination of the U-shaped portion is adjusted based on the direction of the radiated electromagnetic field from the inside of the device main body, thereby effectively preventing the electromagnetic field radiated inside the device main body from leaking to the outside. I can do it.
[0010]
An optical disc device according to a third aspect of the present invention is movable between an apparatus main body; a take-out position disposed outside the apparatus main body and a reading position housed inside the apparatus main body. A tray disposed inside the apparatus main body below the tray; a clamper disposed inside the apparatus main body and formed at least partially of metal; and a tray driving gear for driving the tray. .
[0011]
According to this optical disk device, since at least a part of the clamper is formed of metal, the electromagnetic field radiated inside the device main body can be prevented from leaking to the outside.
An optical disc device according to a fourth aspect of the present invention is the optical disc device according to the third aspect of the present invention, wherein the tray driving gear has a clamper elevating portion formed with portions having different heights. A clamper main body; a support shaft for supporting the clamper main body in a vertically rotatable manner near a rear end thereof; a clamp spring disposed adjacent to the support shaft and for urging the clamper main body downward; A U-shaped portion for sandwiching and fixing the tray at the rear side adjacent to the tray lid portion, and a tray interlocking plate having at least a shield metal plate disposed on the surface of the U-shaped portion; and contacting the upper surface of the clamper elevating portion And a projection.
[0012]
According to this optical disk device, since the front panel side of the tray is sandwiched and fixed by the U-shaped portion, there is no gap between the tray and the clamper, and the electromagnetic field can be effectively prevented from leaking from the front panel side.
An optical disc device according to a fifth aspect of the present invention is the optical disc device according to the fourth aspect, wherein the U-shaped portion is formed to be inclined with respect to the tray when fixing the tray.
[0013]
According to this optical disc device, the inclination of the U-shaped portion is adjusted based on the direction of the radiated electromagnetic field from the inside of the device main body, thereby effectively preventing the electromagnetic field radiated inside the device main body from leaking to the outside. I can do it.
An optical disk device according to a sixth aspect of the present invention is the optical disk device according to any one of the third to fifth aspects, wherein the shield plate is electrically grounded to the device main body.
[0014]
In this case, since the shield sheet metal is electrically grounded to the apparatus main body, it is possible to further effectively prevent the electromagnetic field from leaking from the front panel side to the outside.
(1)
BEST MODE FOR CARRYING OUT THE INVENTION
(1) First Embodiment (1-1) Configuration FIG. 1 is a top view of an optical disk device according to a first embodiment. 2 is a front view of the optical disk device, FIG. 3 is a right side view of the optical disk device, and FIG. 4 is a left side view of the optical disk device.
[0015]
This optical disk device mainly includes a mechanical chassis 1, a tray 6, a clamper 7, and a table 10.
On the left side of the mechanical chassis 1, a tray driving motor 2, a belt 3, an inner driving gear 4, and a tray driving gear 5 are provided. A motor shaft pulley is attached to the tray driving motor 2, and a belt 3 is connected to the motor shaft pulley. The other end of the belt 3 is connected to a pulley integrated with the inner driving gear 4, and transmits the rotation of the tray driving motor 2 to the inner driving gear 4. The inner driving gear 4 is combined with a lower gear of the tray driving gear 5 and transmits the rotation to the tray driving gear 5.
[0016]
The tray 6 is disposed on the mechanical chassis 1 so as to be movable in the front-rear direction. The tray 6 has a lid portion 61 at the front end, and has a groove portion 62 substantially matching the disk 100 on the upper surface. The tray 6 has a reciprocating gear 63 that meshes with the tray driving gear 5. When the rotation of the tray driving gear 5 is transmitted to the reciprocating gear 63, the tray 6 moves in the front-back direction.
[0017]
As shown in FIG. 4, the clamper 7 is urged downward by a clamping spring 74 and is disposed above the tray 6. The clamper 7 has a clamper body 71, a disk clamp 72, a protrusion 73, a clamp spring 74, and a support shaft 75. The disk clamp portion 72 is disposed at a substantially center of the clamper main body 71 so as to be movable in the vertical direction, and is magnetized. The protrusion 73 is formed on the tray driving gear 5 side of the clamper main body 71. The projection 73 is arranged so as to contact the upper surface of the tray driving gear 5. The clamp spring 74 urges the clamper body 71 downward near the rear end. The support shaft 75 supports the clamper body 71 at the front side adjacent to the clamp spring 74 so as to be rotatable in the vertical direction.
[0018]
The clamper 7 has a tray interlocking plate 8. The tray interlocking plate 8 has a fixing portion 81, a connecting rod 82, and a shield sheet metal 83. The connecting rod 82 fixes the fixing portion 81 to the clamper main body 71. The shield sheet metal 83 is arranged on the surface of the fixed part 81 and a part of the connecting rod 82. Note that the shield sheet metal 83 may be formed so as to cover the entire surface of the connecting rod 82. The fixing portion 81 is formed in a U-shape so as to sandwich the tray 6 on the rear side adjacent to the lid portion 61 of the tray 6.
[0019]
Further, below the tray 6, as shown in FIG. 2, a table 10 is arranged supported by the mechanical chassis 1. The table 10 includes a pickup driving motor 11 and a disk rotation motor 12. As shown in FIG. 3, a disk fixing part 13 is attached to the disk rotation motor 12. The disk fixing part 13 is formed of metal.
[0020]
FIG. 5 is an enlarged view of the tray driving gear 5. The tray driving gear 5 has an upper gear 51, a lower gear 52, and a tray elevating unit 53. The tray elevating unit 53 has a first portion 501 and a second portion (cut portion) 502 formed lower than the first portion. When the tray 6 is stored at the reading position, the protrusion 73 of the clamper 7 is in contact with the upper surface of the second portion 502. On the other hand, when the tray 6 is at the removal position, the projection 73 of the clamper 7 is in contact with the first portion 501.
[0021]
〔motion〕
When the tray driving gear 5 rotates and the tray 6 moves from the reading position to the removal position, the protrusion 73 moves to the first portion 501 and is pushed up. As a result, the clamper main body 71 rotates upward about the support shaft 75 against the clamp spring 74. As a result, the disk clamp by the disk clamp unit 72 is released, and the fixing of the tray 6 by the fixing unit 81 is released.
[0022]
Thereafter, when the tray driving gear 5 rotates in the reverse direction and the tray 6 moves from the take-out position to the reading position, the projection 73 causes the upper surface of the tray driving gear 5 to move to the first portion by the bias of the clamp spring 74. It moves downward from 501 to the second part 502. The protrusion 73 is lowered to the height of the second portion 502, and the clamper body 71 is also rotated downward about the support shaft 75. As the clamper body 71 moves downward, the table 10 moves upward, and the disk fixing portion 13 contacts the lower surface of the disk 100. At this time, the disk clamp portion 71 is attracted to the disk fixing portion 13 by a magnetic force, and the disk 100 is sandwiched between the disk clamp portion 71 and the disk fixing portion 13. When the clamper body 71 moves downward, the tray interlocking plate 8 also moves downward, and the fixing portion 81 sandwiches and fixes the tray 6 on the rear side adjacent to the lid 61. That is, the clamper 7 fixes the tray 6 simultaneously with the disk clamp.
[0023]
The shield sheet metal 83 shields an electromagnetic field emitted by driving the optical pickup and an electromagnetic field emitted by driving the tray 6.
[Summary]
According to this optical disc device, the shield sheet metal 83 is disposed on the surface of the U-shaped portion (fixing portion 81) for fixing the tray 6 on the front panel side, so that the electromagnetic field radiated inside the device main body leaks to the outside. Can be prevented.
[0024]
Further, since the front panel side of the tray 6 is sandwiched and fixed by the U-shaped portion (fixing portion 81), a gap between the tray 6 and the clamper 7 is eliminated, so that the electromagnetic field is effectively prevented from leaking from the front panel side to the outside. Can be prevented.
Further, since the fixing portion 81 of the clamper 7 sandwiches and fixes the tray 6, the weight of the tray 6 is substantially increased, and the vibration of the tray 6 from inside and outside can be reduced. Thus, the vibration of the tray 6 during reproduction and recording can be reduced, and the servo control can be stabilized.
[0025]
Further, as shown in FIG. 2, since the front panel side of the tray 6 is sandwiched by the fixing portion 81, dust entering from a gap between the lid portion 61 and the front panel can be reduced, and dust protection can be improved.
Further, as shown in FIG. 2, since the front panel side of the tray 6 is sandwiched by the fixing portion 81, it is possible to block sound pressure and wind pressure entering from a gap between the lid portion 61 and the front panel, thereby affecting the servo control. Can be reduced.
[0026]
Further, as shown in FIG. 2, since the front panel side of the tray 6 is sandwiched by the fixing portion 81, driving noise leaking from a gap between the lid portion 61 and the front panel can be reduced, and silence can be improved.
(2) Second Embodiment FIG. 6 is a right side view of an optical disc device according to a second embodiment, and FIG. 7 is a left side view of the optical disc device according to the second embodiment. The top view, front view, and enlarged view of the tray drive gear of this optical disk device are the same as those of the first embodiment, and therefore will not be described.
[0027]
As shown in FIGS. 6 and 7, in the present embodiment, in the tray interlocking plate 8, the fixing portion 81 is formed with an inclination in the front-rear direction, and the surfaces of the fixing portion 81 and the connecting rod 82 are shielded metal plates 83. Is arranged. The other configuration is the same as that of the first embodiment, and the description is omitted. The inclination of the fixing portion 81 and the shield sheet metal 83 is adjusted based on the radiation direction of the electromagnetic wave radiated inside the device.
[0028]
By adjusting the shield sheet metal 83 based on the radiation direction of the electromagnetic wave in this manner, even if the radiation direction of the electromagnetic wave differs depending on the circuit configuration of each optical disk device, the electromagnetic wave leaking from the front panel side can be effectively prevented.
(3) Other Embodiments (a) In the first and second embodiments, the shield sheet metal 83 may be connected to the mechanical chassis 1 by wiring. In this case, since the shield sheet metal 83 is electrically grounded to the mechanical chassis 1, the electromagnetic field can be more effectively prevented from leaking from the front panel side to the outside.
[0029]
(B) In the first and second embodiments, the shield plate 83 is disposed on the fixing portion 81 and the connecting rod 82. However, the fixing portion 81 and the connecting rod 82 themselves may be formed of metal.
[0030]
【The invention's effect】
According to the present invention, in an optical disc device, an electromagnetic field radiated inside the device main body can be prevented from leaking outside.
[Brief description of the drawings]
FIG. 1 is a top view of an optical disk device according to a first embodiment.
FIG. 2 is a front view of the optical disk device.
FIG. 3 is a right side view of the optical disk device.
FIG. 4 is a left side view of the optical disk device.
FIG. 5 is an enlarged view of a tray driving gear.
FIG. 6 is a right side view of the optical disc device according to the second embodiment.
FIG. 7 is a left side view of the optical disc device according to the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mechanical chassis 2 Tray drive motor 3 Belt 4 Inner drive gear 5 Tray drive gear 6 Tray 7 Clamper 8 Tray interlocking plate 10 Table 11 Pickup drive motor 12 Disk rotation motor 13 Disk support 51 Upper gear 52 Lower gear 53 Tray elevating unit 61 Cover unit 62 Groove unit 63 Reciprocating gear 71 Clamper body 72 Disk clamp unit 73 Projection unit 74 Clamping spring 75 Support shaft 81 Fixed unit 82 Connecting rod 83 Shield sheet metal 501 First part 502 Second part (cut part)

Claims (6)

The device body,
A tray which is movable between a take-out position arranged outside the apparatus main body and a reading position housed inside the apparatus main body, and for mounting an optical disc;
A table arranged below the tray inside the apparatus main body,
A clamper disposed inside the apparatus main body, the clamper holding the optical disk together with the table when the tray is at the reading position;
A tray driving gear for driving the tray,
An optical disc device comprising:
The tray driving gear is provided with a clamper elevating portion in which portions having different heights are formed,
To the clamper,
A support shaft for supporting the clamper body in a vertically rotatable manner near a rear end thereof;
A clamp spring that is disposed adjacent to the support shaft and biases the clamper body downward;
A U-shaped portion for sandwiching and fixing the tray on the rear side adjacent to the lid portion of the tray, and a shield sheet metal disposed at least on a surface of the U-shaped portion, wherein the shield sheet metal is electrically connected to the apparatus main body. A tray interlocking plate that is electrically grounded,
A protrusion that contacts the upper surface of the clamper elevating unit,
When the tray moves to the take-out position, the protrusion moves to a higher position of the clamper elevating section, so that the clamper moves upward to release the optical disc from being clamped, and the U-shaped portion is used. Unlock the tray,
When the tray moves to the reading position, the protrusion moves to a lower position of the clamper elevating unit, so that the clamper moves downward to clamp the optical disc, and the U-shaped part causes the tray to move. And fix
Preventing the electromagnetic field radiated inside the apparatus main body from leaking to the outside by the tray interlocking plate,
An optical disc device characterized by the above-mentioned. The U-shaped portion is formed so as to be inclined with respect to the tray when fixing the tray, and prevents an electromagnetic field radiated inside the apparatus main body from leaking outside. The optical disk device according to claim 1. The device body,
A tray which is movable between a take-out position arranged outside the apparatus main body and a reading position housed inside the apparatus main body, and for mounting an optical disc;
A table arranged below the tray inside the apparatus main body,
A clamper disposed inside the apparatus main body, at least a part of which is formed of metal,
A tray driving gear for driving the tray,
An optical disk device comprising: The tray driving gear has a clamper elevating unit formed with portions having different heights,
The clamper is:
The clamper body,
A support shaft that supports the clamper body rotatably in the vertical direction near the rear end,
A clamp spring that is disposed adjacent to the support shaft and biases the clamper body downward;
A U-shaped portion that sandwiches and fixes the tray on the rear side adjacent to the lid portion of the tray, a tray interlocking plate having a shield sheet metal disposed at least on the surface of the U-shaped portion,
A projection that contacts an upper surface of the clamper elevating unit,
The optical disk device according to claim 3. The optical disk device according to claim 4, wherein the U-shaped portion is formed so as to be inclined with respect to the tray when fixing the tray. 6. The optical disk device according to claim 3, wherein the shield sheet metal is electrically grounded to the device main body.

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