JP3128619U - Optical disk device - Google Patents

Abstract

An optical disk device is provided which is improved in vibration characteristics, in particular, vibration proofing properties and stabilizes the posture of a traverse chassis.
Two places at a rear end portion of a traverse chassis 2 are attached to a loader chassis 1 via a first rubber damper 3, and a cap 6 is attached to a boss portion 2b at the front end of the traverse chassis via a second rubber damper 5. In the optical disk apparatus which is attached and inserted into the cam groove 7a of the cam slider 7, rubber dampers having different shapes and / or materials are used in combination as the first and second rubber dampers 3 and 5. As a result, the vibration characteristics are improved, and an overall balanced anti-vibration property is exhibited. The flange 6a of the cap 6 is brought into contact with the flange contact portion 2c of the traverse chassis 2, and the tip surface 6b of the cap 6 is brought into contact with the inner wall surface 1c of the loader chassis 1, thereby preventing the cap 6 from tilting and traversing. The inclination of the chassis 2 is regulated and stabilized.
[Selection] Figure 2

Description

  The present invention relates to an optical disc apparatus such as a CD and a DVD, and more particularly, to an optical disc apparatus improved so as to improve the posture stability, vibration characteristics, operation, and the like of a traverse chassis.

  As an optical disc device of this type, the rear end of the traverse chassis on which an optical pickup, turntable, etc. are mounted is attached to the loader chassis via the first buffer so that it can be pivoted up and down. In addition, a cap-shaped shaft body is attached to the front end surface of the traverse chassis via the second shock absorber so that the shaft body is attached to the front edge of the loader chassis. What was inserted in the cam groove is known (patent document 1).

  In addition, as an anti-vibration mechanism for an optical disc apparatus that attenuates external vibration transmitted to an optical deck unit that records and reproduces optical discs, at least three or more gel dampers that support the optical deck unit and have high hardness and low damping capability (First damper) and one having a smaller number of oil dampers (second dampers) than a gel damper having a low hardness for absorbing external vibration and a large damping capacity are known (Patent Document 2). ).

The disk drive unit is elastically supported by the chassis via the first elastic member, and the cam gear for moving the disk drive unit up and down is attached to the chassis via the second elastic member different from the first elastic member. An elastically supported disk drive device is also known (Patent Document 3).
JP 2003-223776 A JP 2000-163945 A JP-A-9-91819

  In the optical disc apparatus of Patent Document 1, the rear end portion of the traverse chassis is attached to the loader chassis via the first buffer, and the cap-shaped shaft body is attached to the protrusion of the traverse chassis via the second buffer. Although the vibration characteristics are stabilized by using the same shape cylinder made of the same anti-vibration rubber as the first shock absorber and the second shock absorber, the overall balance is not necessarily achieved. It is hard to say that the anti-vibration effect is obtained. Moreover, since the cap-shaped shaft body is attached so as not to contact the front end surface of the traverse chassis, the cap-shaped shaft body tilts with respect to the traverse chassis within the allowable deformation range of the second buffer body. Therefore, if the traverse chassis posture is tilted for some reason, the cap-shaped shaft engaged with the cam groove of the cam slider also tilts, and the traverse chassis tilt cannot be regulated. There was a problem.

  On the other hand, the vibration isolating mechanism of Patent Document 2 uses three or more gel dampers as the first damper and an oil damper as the second damper. It cannot be applied as an anti-vibration mechanism for an optical disc apparatus using anti-vibration rubber cylinders as the first and second shock absorbers as in Document 1 and having only three shock absorbers. Even if it is applied, the above-mentioned problem caused by the cap-shaped shaft cannot be solved.

  Further, the disk drive device of Patent Document 3 moves the disk drive unit up and down with a cam gear, and the second elastic member has a shape adapted to the cam gear. The vibration isolation technology of the drive device cannot be improved by applying it to the optical disk device of Patent Document 1 in which the traverse chassis is moved up and down by a cam slider.

  The present invention has been made under the above circumstances, and in an optical disc apparatus having a structure substantially similar to that of Patent Document 1, it is intended to improve its vibration characteristics, particularly vibration isolation, and stabilize the posture of the traverse chassis. This is a solution issue.

  In order to solve the above-mentioned problems, the optical disk apparatus according to the present invention is capable of vertically rotating two places at the rear end of a traverse chassis equipped with an optical pickup, a turntable, etc., to a loader chassis via a first rubber damper. An optical disk apparatus in which a cap is attached to a boss part protruding from the front end of the traverse chassis via a second rubber damper, and this cap is inserted into a cam groove of a cam slider attached to the front edge part of the loader chassis In the above, as the first and second rubber dampers, rubber dampers having different shapes and / or materials are used in combination. Here, “shape” is a term of a broad concept including not only the outer shape but also solid, hollow, and other internal shapes (internal structure). In addition to the type of material, “material” It is a term of wide concept including hardness, loss factor and other physical properties.

  In the optical disk device of the present invention, it is preferable that the flange formed on the opening edge of the cap is brought into contact with the flange contact portion formed at the front end of the traverse chassis, and the traverse chassis faces upward. It is also preferable that the front end surface of the cap is brought into contact with the inner wall surface of the front edge portion of the loader chassis when the cap is turned horizontally.

  Further, a more specific preferable optical disk apparatus of the present invention is capable of vertically turning two places at the rear end portion of the traverse chassis on which the optical pickup, the turntable, etc. are mounted, to the loader chassis via the first rubber damper. In an optical disk apparatus in which a cap is attached to a boss protruding from the front end of the traverse chassis via a second rubber damper, and this cap is inserted into a cam groove of a cam slider attached to the front edge of the loader chassis. A solid grommet-shaped rubber damper having a center hole as the first rubber damper and a hollow grommet-shaped rubber damper having both ends opened as the second rubber damper are formed in combination at the opening edge of the cap. The flange formed on the front end of the traverse chassis The front end surface of the cap is in contact with the inner wall surface of the front edge portion of the loader chassis when the traverse chassis is turned upward and becomes horizontal. It is a feature.

  As in the optical disc apparatus of the present invention, the first rubber damper interposed between the two attachment positions of the rear end portion of the traverse chassis, and the second rubber damper interposed between the boss portion of the front end of the traverse chassis and the cap As a result, if rubber dampers with different shapes and / or materials are used in combination, the vibration characteristics can be improved depending on the combination, so that a balanced vibration isolation can be exhibited as a whole. It is also possible to perform recording / reproduction at double speed or quadruple speed.

  The optical disk apparatus in which the flange formed at the opening edge of the cap is brought into contact with the flange contact portion formed at the front end of the traverse chassis prevents the cap from tilting with respect to the traverse chassis. Even when an attempt is made to tilt the traverse chassis due to the influence, the cap that has been prevented from tilting as described above engages with the cam groove of the cam slider to regulate the tilt of the traverse chassis. Can be stabilized horizontally.

  Furthermore, when the traverse chassis is turned upward to become horizontal, the optical disc apparatus in which the tip end surface of the cap is brought into contact with the inner wall surface of the front edge portion of the loader chassis is used to prevent the cap from being tilted by the flange. Combined with the action, the cap tip tilted against the inner wall surface of the loader chassis more reliably prevents the cap from tilting, further improving the traverse chassis tilt control and stabilizing the traverse chassis posture. The effect becomes remarkable.

  And, as a more specific preferable optical disc apparatus of the present invention, a solid grommet-shaped rubber damper having a center hole as a first rubber damper, and a hollow grommet-shaped rubber damper having both ends opened as a second rubber damper Since the first solid grommet-shaped rubber damper is harder than the second hollow grommet-shaped rubber damper, the first solid grommet-shaped rubber damper The rear end of the traverse chassis is firmly supported, and the vibration generated at the rear of the traverse chassis is damped, and the second hollow grommet-shaped rubber damper softer than the first rubber damper generates at the front of the traverse chassis. Attenuates large vibrations and exhibits balanced vibration isolation on the whole Door can be.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view of an optical disc apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a main part of the optical disc apparatus, and FIG. 3 is a cross-sectional view of a mounting portion of a rear end portion of a traverse chassis in the optical disc apparatus. 4 is a cross-sectional view of a portion of the optical disc apparatus where a cap at the front end of the traverse chassis is attached, FIG. 5A is a perspective view of a first grommet-shaped first rubber damper used in the optical disc apparatus, and FIG. (B) of FIG. 6 is a cross-sectional view of the rubber damper, FIG. 6 (a) is a perspective view of a second rubber damper having a hollow grommet shape used in the optical disc apparatus, and FIG. 5 (b) is a diagram of the rubber damper. It is sectional drawing.

  As shown in FIG. 1, this optical disk apparatus is provided with a synthetic resin traverse chassis 2 on the inner side of a synthetic resin loader chassis 1 and rotated up and down via a first rubber damper 3 at two left and right ends of the rear end portion. It is mounted movably. As shown in FIGS. 5A and 5B, the first rubber damper 3 is a solid grommet-shaped rubber having a circumferential groove 3c formed on the outer surface of a thick cylindrical body 3b having a center hole 3a. It is a damper, and four protrusions 3d are formed on the upper and lower surfaces with an interval of 90 °. This rubber damper is made of, for example, butyl rubber, silicon rubber, or the like, and has a solid grommet shape as described above, so it is somewhat hard and does not have a great damping performance. The above “solid” grommet shape means that the grommet-shaped (eyelet-shaped) cylindrical body 3b having the center hole 3a and the circumferential groove 3c itself is not hollow but solid.

  The rear end portion of the traverse chassis 2 to the loader chassis 1 is formed by forming the first rubber damper 3 on the left and right sides of the rear end portion of the traverse chassis 2 as shown in FIGS. The screw 2 is inserted into the slit 2 a and screwed into the screw hole 1 a of the loader chassis 1 from below with the both side edges of the slit 2 a fitted in the circumferential groove 3 c of the rubber damper 3. Therefore, the traverse chassis 2 is mounted so as to be rotatable up and down within the allowable deformation range of the first rubber damper 3 with the left and right mounting locations at the rear end as fulcrums, and vibrations generated at the rear of the traverse chassis 2 Is damped by the first rubber damper 3.

  On the other hand, at the front end of the traverse chassis 2, a boss portion 2b is projected forward as shown in FIGS. 2 and 4, and a second rubber damper 5 is fitted on the boss portion 2b. . A cap 6 made of synthetic resin is attached to the boss 2b via the second rubber damper 5.

  As shown in FIGS. 6A and 6B, the second rubber damper 5 fitted to the boss 2b has a hollow grommet shape having openings 5a at both ends and a circumferential groove 5b formed in the middle. These rubber dampers are made of, for example, butyl rubber or silicon rubber. The above-mentioned “hollow” grommet shape means that the grommet-shaped (eyelet-shaped) rubber damper 5 itself is a hollow body, and the skin layer 5c has a grommet shape as shown in FIG. It means that the inside is hollow. Since the second rubber damper 5 is a hollow grommet-shaped damper as described above, it is more flexible and has a higher damping performance than the first rubber damper 3 having a solid grommet shape. The vibration generated in the front portion of the traverse chassis 2 is damped by the second rubber damper 5.

  The synthetic resin cap 6 attached to the boss 2b of the traverse chassis 2 via the second rubber damper 5 has a flange 6a at the opening edge of the rear end of the cap, as shown in FIGS. The small hole 6c is formed in the front end surface 6b. The flange 6a of the cap 6 is in contact with a flange contact portion 2c formed at the front end of the traverse chassis 2, thereby preventing the cap 6 from tilting with respect to the traverse chassis 2. .

  The cap 6 is inserted into a cam groove 7a of a cam slider 7 which is slidably attached to the front edge portion 1b of the loader chassis 1, and the drive pinion gear which meshes with the rack gear 7b in FIG. When the left side is slid by 8a, the cap 6 is lowered while moving in the cam groove 7a. Therefore, the traverse chassis 2 is also lowered while rotating downward, and conversely, when the cam slider 7 is slid rightward, the cap 6 Since 6 rises while moving in the cam groove 7a, the traverse chassis 2 also rises while rotating upward. When the traverse chassis 2 is raised and leveled in this manner, the front end surface 6b of the cap 6 is brought into contact with the inner wall surface 1c of the front edge portion 1b of the loader chassis 1 as shown in FIG. .

  As shown in FIG. 1, an optical pickup 9, a turntable 10, and the like are mounted on the traverse chassis 2, and a disc tray (not shown) that conveys an optical disc is disposed on the upper side of the traverse chassis 2. It is attached inside the loader chassis 1 so as to be able to move forward and backward.

  The optical pickup 9 moves along the main shaft 11a and the sub shaft 11b in the tracking direction, that is, in the direction approaching / separating from the turntable 10, and when moving in the approaching direction. A laser beam is emitted from the optical pickup 9 to the optical disk.

  Further, the turntable 10 is fixed to the output shaft of the spindle motor 12 mounted on the traverse chassis 2, and when the traverse chassis 2 is raised as described above, the turntable 10 and the clamper 13 directly above the turntable 10. The optical disk is rotated with a central opening edge of the optical disk interposed therebetween. The clamper 13 is rotatably held by a clamper holding portion 1e at the center of the bridge portion 1d installed above the loader chassis 1 so as to straddle the disc tray.

  The optical disc apparatus configured as described above operates as follows to perform recording / reproduction. First, the optical disk is placed on the disk tray, inserted into the loader chassis 1, and the optical disk is positioned between the turntable 10 and the clamper 13. Then, the cam slider 7 slides to the right as described above, and the traverse chassis 2 rotates upward (rises), and the optical disk is sandwiched and rotated by the turntable 10 and the clamper 13. When the optical disk rotates, the optical pickup 9 moves toward the turntable 10 along the main shaft 11a and the sub shaft 11b, and the laser beam is irradiated to the optical disk through the objective lens of the optical pickup 9, and the reflected beam is reflected on the optical pickup 9. Recording / reproduction is performed by the light detector. When the recording / reproduction is completed, the cam slider slides in the reverse direction (leftward), the traverse chassis 2 rotates (lowers) downward, and the optical disc is placed on the disc tray and taken out.

  As described above, this optical disk apparatus includes a solid grommet-shaped rubber damper having a center hole 3a as the first rubber damper 3, and a hollow grommet-shaped rubber damper having openings 5a at both ends as the second rubber damper 5. Used in combination, the first solid grommet-shaped rubber damper 3 is harder than the second hollow grommet-shaped rubber damper 5, so that the first solid grommet-shaped rubber damper 3 is traversed. The mounting location of the rear end portion of the chassis 2 can be firmly supported. However, the first solid grommet-shaped rubber damper 3 has a lower damping performance than the second hollow grommet-shaped rubber damper 5, but the vibration generated in the rear part of the traverse chassis 2 is not so large. The rubber damper 3 can sufficiently damp vibrations. On the other hand, the second hollow grommet-shaped rubber damper 5 interposed between the boss 2b at the front end of the traverse chassis 2 and the cap 6 is softer and has higher damping performance than the first rubber damper 3. Therefore, the large vibration generated at the front portion of the traverse chassis 2 can be sufficiently damped. In this optical disk apparatus, as described above, small vibrations generated at the rear part of the traverse chassis 2 are attenuated by the first solid grommet-shaped rubber damper 3 having a low damping performance, and are generated at the front part of the traverse chassis 2. Large vibrations are damped by the second solid grommet-shaped rubber damper 5 having high damping performance, so that a balanced anti-vibration property can be exhibited as a whole.

  In addition, this optical disk apparatus makes it possible to prevent the cap 6 from tilting with respect to the traverse chassis 2 by bringing the flange 6a of the cap 6 into contact with the flange contact portion 2c formed at the front end of the traverse chassis 2. Since the front end surface 6b of the cap 6 is brought into contact with the inner wall surface 1c of the front edge 1b of the loader chassis 1 when the traverse chassis 2 is horizontal, the tilt of the cap 6 can be more reliably prevented. Even when the traverse chassis 2 is tilted due to the influence, the cap 6 that is prevented from tilting as described above is engaged with the cam groove 7a of the cam slider 7 to regulate the tilt of the traverse chassis 2, The posture of the traverse chassis 2 can be stabilized horizontally.

  As described above, the optical disc of the present invention has improved vibration characteristics and can exhibit a well-balanced vibration proofing property as a whole, and can stabilize the posture of the traverse chassis 2 horizontally. Even 4 × speed recording / reproduction can be performed without any trouble.

  As described above, the optical disk device of the present invention has been described with reference to an embodiment in which a solid grommet-shaped rubber damper is used as the first rubber damper and a hollow grommet-shaped rubber damper is used as the second rubber damper. The present invention is not limited to such a combination of rubber dampers, and any combination of rubber dampers having different shapes and / or materials can be adopted.

1 is a plan view of an optical disc apparatus according to an embodiment of the present invention. It is a principal part disassembled perspective view of the same optical disk device. It is sectional drawing of the attachment part of the traverse chassis rear-end part in the same optical disk device. It is sectional drawing of the part which attached the cap of the traverse chassis front end in the same optical disk apparatus. (A) is a perspective view of a solid grommet-shaped first rubber damper used in the optical disc apparatus, and (b) is a cross-sectional view of the rubber damper. (A) is a perspective view of a hollow grommet-shaped second rubber damper used in the optical disc apparatus, and (b) is a cross-sectional view of the rubber damper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loader chassis 1b Front edge part of loader chassis 1c Inner wall surface of front edge part of loader chassis 2 Traverse chassis 2b Boss part of traverse chassis 2c Flange contact part 3 First solid grommet-shaped rubber damper 3a Center hole 5 First Two hollow grommet-shaped rubber dampers 5a Opening 6 Cap 6a Cap flange 6b Cap end surface 7 Cam slider 7a Cam groove 9 Optical pickup 10 Turntable

Claims (4)

Two places on the rear end of the traverse chassis equipped with optical pickups, turntables, etc. are attached to the loader chassis via the first rubber damper so as to be able to rotate up and down, and the second boss part protruding from the front end of the traverse chassis In the optical disc apparatus in which a cap is attached via a rubber damper and this cap is inserted into a cam groove of a cam slider attached to the front edge portion of the loader chassis.
A solid grommet-shaped rubber damper having a center hole as the first rubber damper and a hollow grommet-shaped rubber damper having both ends opened as the second rubber damper are used in combination, and formed on the opening edge of the cap. The flange is brought into contact with a flange contact portion formed at the front end of the traverse chassis, and when the traverse chassis is turned upward to become horizontal, the front end surface of the cap is moved to the front edge of the loader chassis. An optical disc apparatus characterized by being brought into contact with an inner wall surface of a portion. Two places on the rear end of the traverse chassis equipped with optical pickups, turntables, etc. are attached to the loader chassis via the first rubber damper so as to be able to rotate up and down, and the second boss part protruding from the front end of the traverse chassis In the optical disc apparatus in which a cap is attached via a rubber damper and this cap is inserted into a cam groove of a cam slider attached to the front edge portion of the loader chassis.
An optical disc apparatus comprising a combination of rubber dampers having different shapes and / or materials as the first and second rubber dampers.   3. The optical disc apparatus according to claim 2, wherein a flange formed at an opening edge of the cap is brought into contact with a flange contact portion formed at a front end of the traverse chassis.   The said traverse chassis rotates upwards and becomes horizontal, The front end surface of the said cap was made to contact | abut to the inner wall surface of the front edge part of a loader chassis. Optical disk device.

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