JP2011018416A - Optical disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk apparatus in which pitching and rolling of a tray of the apparatus during an insertion/ejection of the tray are suppressed in a simple structure, and which does not cause an increased cost due to an increased number of parts and increased assembly man-hours and can also reduce a height the apparatus.SOLUTION: The optical disk apparatus includes convex rails 1d which are formed and arranged on inner surfaces of the right and left sidewalls 1a of a loader chassis 1 in parallel to each other. Each of the convex rails 1d can be fit into corresponding one of concave grooves 9a formed on the right and left sides of a tray 9 so that the tray 9 can slide on the rails 1d. The tray 9 is thus attached inside of the loader chassis 1 so that the tray 9 can be inserted into or ejected from the apparatus. In addition, the apparatus includes a resin spring integrated on at least one of the inner surface of the right and left sidewalls 1a of the loader chassis 1. The resin spring energizes the tray 9 toward the opposite sidewall with respect to the sidewall on which the resin spring is formed. Accordingly, an unstable fitting between the concave groove 9a and the convex rail 1d hardly occurs to suppress a pitching of the tray 9, and pressing of the resin spring suppresses a rolling of the tray 9.

Description

  The present invention relates to an optical disc apparatus for recording / reproducing on / from an optical disc such as a CD, MD, and DVD, and in particular, has been improved so as to be able to suppress pitch and roll during insertion / ejection operations of a tray for transporting the optical disc. The present invention relates to an optical disk device.

  Conventionally, a traverse chassis with an optical pickup mounted so that it can be moved toward and away from the turntable is mounted on a loader chassis with a clamper at the top, and a cam slider that swings the traverse chassis up and down. There is known an optical disk apparatus in which a tray for mounting and conveying an optical disk is disposed between a traverse chassis and a clamper so that the tray can be inserted into and ejected from a loader chassis.

  As shown in FIG. 7, most of such optical disc apparatuses are provided with rails 10d and 10d protruding upward on the inner sides of the left and right side walls 1a and 1a of the loader chassis 1, and the left and right sides of the tray 9 are provided on the rails 10d and 10d. The concave grooves 90a, 90a formed on the lower surface of the edge are slidably fitted, and the guide grooves 10a, 10h projecting inward from the left and right side walls 1a, 1a of the loader chassis 1 form the concave grooves 90a, 90a of the tray 9. The tray 9 is attached to the inside of the loader chassis 1 so as to be able to be inserted / extracted so as not to be separated from the rails 10d and 10d.

  Also, guide rollers that attach rails that protrude inward from the left and right side walls of the chassis, fit the rail grooves formed on the left and right ends of the tray to the rails, slidably mount the tray, and guide the rails to fit the rail grooves. A disc player is also known that is configured such that a coil spring is pressed against a tray by a coil spring (Patent Document 1).

Japanese Utility Model Publication No. 5-15151

  However, in the conventional optical disc apparatus in which the tray 9 is attached to the inside of the loader chassis 1 so as to be inserted and ejected by the attachment structure shown in FIG. 7, the rail 10d and the guide 10h are provided inside the left and right side walls 1a and 1a of the loader chassis 1. In the state where the dimensional accuracy when integrally molding with synthetic resin is low and the concave groove 90a of the tray 9 is fitted to the rail 10d and attached, the gap between the concave groove 90a and the rail 10d, Since the gap between the upper surface and the guide 10h is increased and so-called fitting play occurs, there is a problem that the tray 9 swings and rolls during the tray 9 insertion / discharge operation.

  Further, when the concave grooves 90a and 90a are formed on the lower surfaces of the left and right side edges of the tray 9 as in the conventional optical disc apparatus, the vertical dimension of the tray 9 is increased by the amount of the concave grooves 90a and 90a. There has also been a problem that the height of the loader chassis 1 is increased, leading to an increase in the size of the optical disk apparatus.

  The above-described problems are unlikely to occur in the disc player of Patent Document 1, but the structure becomes complicated when the guide roller is elastically pressed against the tray by a coil spring as in the disc player of Patent Document 1. In addition to the difficulty in miniaturization and the increased cost of parts such as guide rollers and coil springs, the increase in the number of parts and the number of assembling steps causes a new problem of increasing the cost.

  The present invention has been made under the above circumstances, and the problem to be solved is that it is possible to suppress the pitching and rolling during the tray insertion / ejection operation with a simple structure, and the number of parts and the number of assembly steps can be reduced. An object of the present invention is to provide an optical disc apparatus that can be reduced in size (thinned) without increasing the cost due to increase.

In order to solve the above-mentioned problems, an optical disc apparatus according to the present invention is mounted on a loader chassis having a clamper at an upper portion, and a traverse chassis having an optical pickup mounted so as to be able to approach and leave the turntable is swingable up and down. In the optical disk apparatus in which the cam slider for swinging the traverse chassis up and down is mounted, the tray for transporting the optical disk is disposed between the traverse chassis and the clamper and is mounted so as to be inserted and ejected inside the loader chassis.
Convex rails are formed on the inner side surfaces of the left and right side walls of the loader chassis in a horizontal row, and concave grooves formed on the left and right side surfaces of the tray are slidably fitted to the convex rails. The tray is attached to the inside of the loader chassis so as to be inserted and ejected, and biasing means for biasing the tray toward the opposite side wall is provided on the inner surface of at least one of the left and right side walls of the loader chassis. It is characterized by being formed integrally.

  In the optical disk apparatus of the present invention, it is preferable that the urging means is formed on the inner surface of the side wall near the front end of the loader chassis. The urging means is preferably a resin spring formed integrally with the side wall of the loader chassis, and it is preferable that the tip of the resin spring is slidably inserted into the concave groove of the tray.

  As in the optical disk apparatus of the present invention, convex rails are formed in a horizontal row on the inner side surfaces of the left and right side walls of the loader chassis, and the concave grooves formed on the left and right side surfaces of the tray are slid on the convex rails. If the tray is attached to the inside of the loader chassis so that it can be inserted and ejected by fitting freely, the dimensional accuracy during molding of the convex rail and the concave groove is improved, and the vertical position of the convex rail and the concave groove is improved. Since the gap size in the direction is reduced and the vertical backlash is less likely to occur, vertical shaking during the tray insertion / discharge operation can be suppressed. And, as in the optical disc apparatus of the present invention, when the biasing means for biasing the tray toward the opposite side wall is integrally formed on the inner surface of at least one of the left and right side walls of the loader chassis, Rolling during the tray insertion / ejection operation can be suppressed by the biasing means. In particular, when the urging means is formed on the inner surface of the side wall near the front end of the loader chassis, the effect of suppressing the roll of the tray becomes remarkable. As described above, the optical disk apparatus of the present invention can suppress the pitching and rolling during the tray insertion / ejection operation, so that the tray operation can be stabilized and the quality can be improved.

  In addition, as in the case of the optical disk device of the present invention, when the concave grooves are formed on the left and right side surfaces of the tray, compared to the case where the concave grooves are formed on the lower surfaces of the left and right side edges of the tray as in the prior art, Since the vertical dimension of the tray is reduced, the height of the loader chassis can be reduced by that amount, so that the optical disk apparatus can be made thinner, and the cost of the material resin can be saved and the cost can be reduced. And, if the biasing means is integrally formed on the inner surface of the side wall on at least one of the left and right sides of the loader chassis, it is possible to eliminate an increase in cost due to an increase in the number of parts and the number of assembly steps as in Patent Document 1, The complexity of the structure and the increase in size of the apparatus can be prevented.

  Also, if the biasing means is a resin spring formed integrally with the side wall of the loader chassis, in addition to being easy to mold, the tray is biased with a stable pressure to reliably suppress rolling. Furthermore, when the tip of the resin spring is slidably inserted into the concave groove of the tray, the resin spring does not have to be detached from the tray even when subjected to an impact such as dropping.

1 is a perspective view of an optical disc apparatus according to an embodiment of the present invention. It is the cross-sectional view which showed only the loader chassis and tray of the optical disk device. FIG. 3 is a partial plan view of the same optical disc apparatus with a tray inserted about half way. FIG. 3 is a partial plan view of the optical disc apparatus in a state where the tray is ejected (tray open state). FIG. 4 is a partial cross-sectional view taken along line AA in FIG. 3. It is a perspective view of the part which formed the stopper of the tray. It is the cross-sectional view which showed only the loader chassis and tray of the conventional optical disk apparatus.

  The optical disk apparatus shown in FIG. 1 has a synthetic resin traverse chassis 2 disposed inside a synthetic resin loader chassis 1 so that the traverse chassis 2 can swing vertically. Is attached to the loader chassis 1 with a screw through a rubber damper, and a cam slider 3 that swings the traverse chassis 2 up and down is slidably attached to the inside of the front frame portion of the loader chassis 1. Yes. A bridge portion 1b is integrally formed between the upper ends of the left and right side wall portions 1a and 1a of the loader chassis 1, and a synthetic resin clamper 4 is formed in the annular holder portion 1c at the center of the bridge portion 1b. Contained and held.

  A spindle motor 5 is mounted on the front end portion of the traverse chassis 2, and a synthetic resin turntable 6 is fixed to a shaft of the spindle motor 5. The traverse chassis 2 has an optical pickup 7 guided by two guide shafts 8 and 8 (main shaft and sub shaft) so as to be able to approach and separate from the turntable 6, that is, reciprocally move back and forth. It is installed.

  Inside the loader chassis 1, a tray 9 for conveying an optical disc is disposed between the turntable 6 and the clamper 4 and is slidably attached in the front-rear direction. 7. A drive motor (not shown) for operating the tray 9 and a drive force transmission gear mechanism (not shown) are provided in the loader chassis 1 and the traverse chassis 2.

  As shown in FIG. 2, concave and convex grooves 9a and 9a are formed on the left and right side surfaces of the tray 9 over the entire length of the tray, and the inner walls of the left and right side walls 1a and 1a of the loader chassis 1 are correspondingly formed. On the side surface, a plurality of short convex rails 1d, 1d protruding inward are arranged in a horizontal row. Then, as shown in FIGS. 2 to 4, the concave grooves 9 a and 9 a on the left and right side surfaces of the tray 9 are slidably fitted to the convex rails 1 d and 1 d on the left and right side walls 1 a and 1 a of the loader chassis 1. Accordingly, the tray 9 is attached to the inside of the both side walls 1a, 1a of the loader chassis 1 so as to be inserted and ejected, that is, slidable in the front-rear direction.

  When the tray 9 is attached to the inside of the loader chassis 1 with the fitting structure as described above, the dimensional accuracy at the time of molding the concave groove 9a and the convex rail 1d is improved, and the vertical direction between the concave groove 9a and the convex rail 1d is improved. Therefore, the vertical movement of the tray 9 when the tray 9 is inserted and ejected can be suppressed as will be described later. Further, when the concave grooves 1d and 1d are formed on the left and right side surfaces of the tray 9, the vertical dimension of the tray 9 is smaller than in the conventional case where the concave grooves are formed on the lower surfaces of the left and right side edges of the tray. Therefore, the height of the loader chassis 1 can be reduced by that amount, so that the optical disk apparatus can be made thinner, and the cost of the material resin can be saved and the cost can be reduced.

  3 to 5, at least one of the left and right side walls 1a (in this embodiment, the left side wall 1a) of the loader chassis 1 is placed on the inner wall of the opposite side wall 1a (in this embodiment). As an urging means for urging toward the right side wall 1a), a substantially U-shaped resin spring 1e is integrally formed. The substantially U-shaped resin spring 1 e has a tip portion 1 f that is bent inward from the upper end of the rising piece, and the tip portion 1 f is slidably inserted into the concave groove 9 a of the tray 9.

  When such a resin spring 1e is formed on the inner surface of the side wall 1a on one side of the loader chassis 1, the tray 9 is biased toward the opposite side wall 1a by a stable pressure by the resin spring 1e. Since it is possible to suppress the rolling of the tray 9 when the tray 9 is inserted and ejected, and the tip portion 1f of the resin spring 1e is slidably inserted into the concave groove 9a of the tray 9, it is dropped. Even when an impact such as the above is received, there is no fear that the resin spring 1e is detached from the tray 9. Moreover, since the resin spring 1e is integrally formed on the inner surface of the side wall 1a of the loader chassis 1, there is no increase in cost due to an increase in the number of parts and the number of assembly steps.

  The resin spring 1e may be integrally formed on the inner surface of the side wall 1a on the opposite side (right side) of the loader chassis 1 or may be integrally formed on the inner surfaces of the left and right side walls 1a and 1a. Also in this case, it is preferable to form on the inner surface of the side wall near the front end of the loader chassis 1, and if so formed, there is an advantage that the effect of suppressing the rolling of the tray 9 by the resin spring 1e becomes remarkable.

  A stopper 1g as shown in FIGS. 3 and 4 is integrally formed on the inner surfaces of the left and right side walls 1a and 1a of the loader chassis 1 near the front end. When the tray 9 is discharged, FIG. As shown in FIG. 4, the claw piece 9b formed on the upper edge of the concave groove 9a on both sides of the tray 9 is caught by the stopper 1g as shown in FIG.

  In the optical disc measure configured as described above, as shown in FIG. 1, when the tray 9 is ejected, the traverse chassis 2 is lowered, and the clamper 4 and the turntable 6 are separated to be in a non-chucked state. From this state, an optical disk (not shown) is placed on the tray 9 and the tray 9 is inserted into the loader chassis 1 via the driving force transmission gear mechanism (not shown) by the drive motor (not shown). Is transferred between the clamper 4 and the turntable 6, the cam slider 3 slides to raise the traverse chassis 2, and the peripheral edge of the central opening of the optical disk is chucked by the clamper 4 and the turntable 6. The optical disk is rotated. Then, the optical pickup 7 irradiates the optical disc with the laser beam while moving toward the turntable 6 along the guide shafts 8 and 8, and recording / reproduction is performed. When the recording / reproduction is completed, the traverse chassis 2 is lowered by the cam slider 3, the clamper 4 and the turntable 6 are separated, and an optical disk (not shown) is placed on the tray 9, from the front end of the loader chassis 1. Discharged.

  Even if the tray 9 repeats the insertion / ejection operation as described above, the optical disk apparatus has the concave grooves 9a on the left and right side surfaces of the tray 9 and the convexes on the left and right side walls 1a and 1a of the loader chassis 1 as described above. Since there is almost no vertical backlash between the mold rails 1d and 1d and the tray 9 is urged by the resin spring 1e with a stable pressure toward the opposite side wall 1a, the insertion / discharge operation is in progress. Therefore, the vertical movement and the horizontal movement of the tray 9 can be suppressed, and the tray operation can be stabilized and the quality can be improved.

1 Loader Chassis 1a Left and Right Side Walls of Loader Chassis 1d Convex Rail 1e Resin Spring (Biasing Means)
1f Resin spring tip 2 Traverse chassis 3 Cam slider 4 Clamper 6 Turntable 7 Optical pickup 9 Tray 9a Groove

Claims (4)

Mounted on the loader chassis with the clamper at the top is a traverse chassis that mounts the optical pickup so that it can be moved toward and away from the turntable. In an optical disc apparatus in which a tray for transporting is disposed between a traverse chassis and a clamper and attached to the inside of the loader chassis so that it can be inserted and ejected,
Convex rails are formed on the inner side surfaces of the left and right side walls of the loader chassis in a horizontal row, and concave grooves formed on the left and right side surfaces of the tray are slidably fitted to the convex rails. The tray is attached to the inside of the loader chassis so as to be inserted and ejected, and biasing means for biasing the tray toward the opposite side wall is provided on the inner surface of at least one of the left and right side walls of the loader chassis. An optical disc apparatus characterized by being formed integrally.   2. The optical disc apparatus according to claim 1, wherein the urging means is formed on an inner surface of the side wall near the front end of the loader chassis.   The optical disk apparatus according to claim 1 or 2, wherein the biasing means is a resin spring formed integrally with the side wall of the loader chassis.   4. The optical disk apparatus according to claim 3, wherein a tip end portion of the resin spring is slidably inserted into a concave groove of the tray.

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