JP4697113B2 - Optical disk device - Google Patents

Description

  The present invention relates to an optical disk apparatus that reproduces information recorded on an optical disk or records information on an optical disk, and that can smoothly drive a disk tray that carries in and out of the optical disk.

  FIG. 12 shows a perspective view of a conventional optical disc apparatus. As shown in FIG. 12, the optical disc apparatus D allows a disc tray 92 on which an optical disc is placed to enter and exit from a slit-shaped entrance / exit St provided in the front panel Fp of the housing Oh. The optical disc is placed on the disc tray 92, and the disc tray 92 moves to a loading position where recording or reproduction is possible inside the optical disc apparatus D or an unloading position where a user outside the optical disc apparatus D can exchange the optical disc. Moved.

  FIG. 13 is a schematic plan view of a conventional optical disc apparatus, and FIG. 14 is a schematic configuration view of the inside of the conventional optical disc apparatus as viewed from above. In FIG. 14, the disc tray itself is omitted, and only a guide groove 921 and a tray rack 922 described later are shown.

  As shown in FIGS. 13 and 14, the optical disc apparatus D includes a main chassis 91, a disc tray 92 slidably supported on the main chassis 91, and a direction orthogonal to the sliding direction of the disc tray 92 on the main chassis 91. Slidably attached to the main chassis 91, a traverse chassis 94 movably attached to the main chassis 91, a drive force transmission mechanism 95 including a drive motor 98 that outputs drive force, and a slide on the traverse chassis 94. And an optical head 96 which is attached thereto.

  The disc tray 92 is provided with a tray rack 922 on the lower surface. The tray rack 922 meshes with a drive gear 911 provided in the main chassis 91. The drive motor 98 rotates and the drive force output from the drive motor 98 is transmitted to the drive gear 911. As the drive gear 911 rotates, the tray rack 922 meshed with the drive gear 911 and the disk tray 92 provided with the tray rack 922 slide.

  The traverse chassis 94 is attached to the main chassis 91 so as to be movable up and down. When the disc tray 92 slides, the traverse chassis 94 is disposed at the lowest position so as not to obstruct the sliding. As the disc tray 92 approaches the loading position, the disc tray 92 rises. When the disc tray 92 is in the loading position, the disc tray 92 is disposed at the most elevated position. When the traverse chassis 94 is in the most raised position, the turntable 971 provided in the traverse chassis 94 lifts the optical disc, and the optical disc is clamped (chucked) with the disc clamper 973 provided in the main chassis 91. To do. In this state, by driving the spindle motor connected to the turntable 971, the optical disk can be rotated while being firmly held.

  The main chassis 91 is provided with a cam slider 93 that slides in a direction orthogonal to the sliding direction of the disk tray 92. The cam slider 93 is disposed between the disc tray 92 and the main chassis 91, and has a cam slider rack 934 that meshes with the drive gear 911.

  A crank-shaped through groove (not shown) is formed in the cam slider 93, and a rack boss formed on the front surface of the traverse chassis 94 is engaged with the through groove. As the cam slider 93 slides, the rack boss slides in the crank-shaped through groove, and the traverse chassis 94 is raised and lowered relative to the disc tray 92. When the cam slider 93 comes closest to the drive gear 911, the traverse chassis 94 rises to a position closest to the disc tray 92. Conversely, when the cam slider 93 is farthest from the drive gear 911, the traverse chassis 94 is lowered to a position farthest from the disc tray 92. When the traverse chassis 94 comes closest to the disc tray 92, the turntable 971 provided in the traverse chassis 94 lifts the optical disc and clamps (chucks) it with the disc clamper 973 provided in the main chassis 91.

  When the disc tray 92 is in the loading position, the tray rack 922 and the drive gear 911 are not engaged with each other. In other cases, the tray rack 922 is always in mesh with the drive gear 911. The cam slider rack 93 is disengaged from the drive gear 911 when the cam slider 93 is closest to or farthest from the drive gear 911.

  The traverse chassis 94 is moved up and down by sliding of the cam slider 93. As described above, the traverse chassis 94 must clamp the optical disk when the disk tray 92 moves to the loading position without interfering with the sliding of the disk tray 92. Therefore, the traverse chassis 94 needs to be lifted and lowered at an accurate timing according to the sliding of the disc tray 92.

  Therefore, a guide groove 921 is provided on the lower surface of the disk tray 92, and a slider boss 931 that engages with the guide groove 921 is erected on the upper surface of the cam slider 93.

  The guide groove 921 connects the vertical groove portion 9211 extending in the sliding direction of the disk tray 92, the horizontal groove portion 9213 which is disposed on the front side of the vertical groove portion 92111 and is closed on one side, and the vertical groove portion 9211 and the horizontal groove portion 9213. And an oblique groove portion 9212. When the slider boss 931 is in the vertical groove portion 9211, the cam slider 93 is at a position farthest from the drive gear 911, and when entering the oblique groove portion 9212, the slider boss 931 is pushed and the slider rack 934 is engaged. When the slider boss 931 is in the lateral groove portion 9213, the engagement between the tray rack 922 and the drive gear 911 is released.

  The position of the cam slider 93 is determined by the shape of the guide groove 921 formed on the bottom surface of the disc tray 92 and the engagement position of the cam slider 93 with the slider boss 31, and the timing of raising and lowering the traverse chassis 94 is adjusted accordingly. Has been. (See JP 2005-339703 A, JP 2004-288333 A, JP 10-199206 A, etc.)

Japanese Patent Application Laid-Open No. 2006-79690 describes that a tray is driven in a state where a first boss and a second boss sandwich a cam wall and a gear escape prevention wall. This prevents the gear from coming off the rack by sandwiching the cam wall and the gear escape prevention wall between the first boss and the second boss.
JP 2006-79690 A JP 2005-339703 A JP 2004-288333 A JP 10-199206 A

  The optical disk device D tends to be thin, and by reducing the thickness of the optical disk device D, the thickness of each member must be made thin, and the depth of the guide groove 921 of the disk tray 92 is also decreasing. As the depth of the guide groove 921 is reduced, the engagement between the guide groove 921 and the slider boss 31 is reduced.

  When the engagement between the guide groove 921 and the slider boss 931 is reduced, the slider is moved when an impact or vibration is applied to the disc tray 92 (for example, a drop during transportation or contact with a wall surface). The boss 931 may easily get over the guide groove 921.

  When the power of the optical disk apparatus D is turned on with the slider boss 931 over the guide groove 921, the switching of the operation between the cam slider 93 and the disk tray 92 is not performed at an appropriate timing, and the disk tray 92 reaches the unload position. In some cases, the optical disc apparatus D may not be operated because the disc tray 92, the turntable 971, and the driving force transmission mechanism 95 are subjected to an unreasonable force and are deformed or destroyed. is there.

  The optical disk apparatus in which the above-described problems have occurred must be disassembled and reassembled, or parts must be replaced, and accordingly, extra labor, time and members are required.

  Therefore, the present invention has been made in view of the above-described problems, even when the operation timing of the disk tray and the traverse chassis is shifted due to impact or vibration during transportation or installation, It is an object of the present invention to provide an optical disc apparatus capable of detecting the timing shift and returning to the original state.

  In addition, the present invention has been made in view of the above-described problems, and the optical disc apparatus itself is automatically brought into an original state without disassembling, adjusting, and replacing parts of the operation timing of the disc tray and the traverse chassis. An object of the present invention is to provide an optical disc apparatus that can reduce the occurrence rate of defective products.

  Furthermore, the present invention has been made in view of the above-described problems, and with a simple configuration, the operation timing of the disk tray and the traverse chassis can be restored to the initial state, thereby reducing the manufacturing cost of the optical disk apparatus. An object of the present invention is to provide an optical disc apparatus capable of achieving the above.

In order to achieve the above object, the present invention provides a disc tray on which an optical disc is placed and reciprocally slid to carry in / out the optical disc, and a traverse chassis for sandwiching or releasing the optical disc carried in the disc tray, A cam slider that slides in a direction perpendicular to the sliding direction of the disk tray and raises and lowers the traverse chassis; and a drive gear that transmits a driving force to the disk tray and the cam slider; A tray rack that meshes with the drive gear and extends in the sliding direction; a cylindrical slider boss projecting from the cam slider; and a guide groove that is bent at the front side. It is equipped with a cam slider rack for meshing with the gears. An optical disc apparatus for performing reproduction or recording, wherein the guide groove is formed by a lower surface of the disc tray, an outer guide rib formed on a bent outer side of the guide groove, and an inner guide rib formed on a bent inner side. The guide groove is connected to a longitudinal groove portion along the sliding direction of the disk tray, a transverse groove portion orthogonal to the sliding direction, and a front end portion of the longitudinal groove portion, and the longitudinal groove portion and the transverse groove portion are connected to each other. The inner guide rib forming the longitudinal groove portion is formed with an opening where the inner guide rib is divided, and the lateral groove portion is provided with the guide groove of the inner guide rib. and a continuously provided by ribs on the opposite side, the outermost from the vertical position and the lateral groove offset radius and the same length of the slider boss than the farthest portion from the groove the vertical groove of the lateral groove portion Between the distant portion, said and stopper ribs extending in the back side of the sliding direction of the disc tray is formed, said opening when said disc tray slides toward the front, the disc tray at the same time The slider boss of the cam slider to be driven is formed at a position where it can pass.

  According to this configuration, a force such as impact and vibration of the optical disk device is applied during transportation and installation, and the loose fit between the guide groove of the disk tray and the slider rack of the cam slider is disengaged, and the disk tray and / or cam slider is normal. Even if the system does not operate normally, it can be restored to a normal state without reassembling or replacing parts.

  As a result, maintenance labor and time can be reduced. In addition, since malfunctions can be corrected, the incidence of defective products is reduced. Further, it is possible to provide an optical disc apparatus that can be used even in a severer usage condition and can be corrected even when a malfunction occurs and can be used in more places.

  In addition, since no special members or new members are used as compared with conventional ones, processes and time required for designing, prototyping, and manufacturing the members can be shortened, and an increase in cost can be suppressed.

In the above structure, the rear end portion of the opening pull connects the formed disengagement prevention part away from said longitudinal groove toward the front, the inner guide ribs forming the lateral groove portion and the end portion of the front side May be included.

  According to this configuration, even if the tray rack of the disc tray is not in mesh with the drive gear, the slider boss pushes the retracting portion and the disc tray slides by the sliding operation of the cam slider. As a result, the tray rack meshes with the drive gear, and the disk tray is slid by the drive force from the drive gear.

  This can be corrected so that the disc tray and the cam slider operate normally even when the portion where the tray rack is formed has shifted due to manufacturing errors or assembly errors. As a result, the occurrence of defects in the optical disk device can be reduced.

  Also, since the slider boss is pulled into the guide groove at the drop-off prevention part, even if the cam slider cannot move sufficiently and cannot return to the guide groove only by the driving force of the drive gear, it is pushed by the drop-off prevention part. It is possible to return. Further, since the drop-off preventing portion and the slider boss can be prevented from coming into strong contact even during normal operation, vibration during sliding of the disc tray and occurrence of shaking can be suppressed.

  Attached to the back side of the horizontal groove part in the disc tray sliding direction is an approaching from the front to the back of the vertical groove part, and an end on the front side is formed farther from the vertical groove part than the stopper rib. A force guide rib may be formed.

  According to this configuration, the slider boss is attached when the disc tray moves in the opening direction even when the cam slider is not engaged with the drive gear due to manufacturing error or assembly error of the cam slider rack. It abuts on the urging guide rib and is moved from the urging guide rib to the longitudinal groove portion side. As a result, correction is possible.

A more detailed example of the optical disk device described above can be described as follows. In addition, the code | symbol shown in a parenthesis behind a member is the number attached | subjected according to drawing shown in embodiment, and it cannot be overemphasized that this invention is not limited. A main chassis (1), a disc tray (2) on which an optical disc is placed and reciprocally slid relative to the main chassis (1) to carry in / out the optical disc, and the main chassis (1) attached to the main chassis (1) A traverse chassis (4) that moves up and down with respect to the disc tray (2) and clamps or opens an optical disc carried in the disc tray (2), and slides the disc tray (2) on the main chassis (1). A cam slider (3) that is slidably mounted in a direction orthogonal to the moving direction, and is pivotally supported by the main chassis (1) so as to move up and down the traverse chassis (4), and the disc tray (2) And a drive gear (11) for transmitting a driving force to the cam slider (3), and the disc tray (2) is engaged with the drive gear (11) and slides. A tray rack (22) extending in the direction and a guide groove (21) in which a cylindrical slider boss (31) protruding from the cam slider (3) is loosely fitted and bent on the front side, and the cam slider (31) is an optical disc apparatus A that includes a cam slider rack (34) for meshing with the drive gear (11) and that reproduces or records data by irradiating the optical disc with laser light. The guide groove (21) is formed on the lower surface of the disc tray (2) and the outer guide rib (23) formed on the bent outer side of the guide groove (21) integrally projecting from the lower surface and on the inner side of the bent. The guide groove (21) includes a longitudinal groove portion (211) along the sliding direction of the disc tray (2), and the sliding direction. A transverse groove portion (213) that intersects, and an oblique groove portion (212) that is connected to the front end portion of the vertical groove portion (211) and connects the vertical groove portion (211) and the horizontal groove portion (213). The inner guide rib (231) forming the longitudinal groove (211) is formed with an opening (230) from which the inner guide rib (231) is divided, and the inner side of the opening (230). Is a drop-off prevention part (261) formed so as to be away from the vertical groove part toward the front side, and a lead-in part connected to the inner guide rib (233) forming the lateral groove part (213) at the end part on the front side. (262), and the lateral groove portion (213) is a rib continuously provided on the side opposite to the guide groove (21) of the inner guide rib (233), and the lateral groove portion (213). ) Of the longitudinal groove (211) Between the radius and the farthest portion from the longitudinal groove (211) of the lateral groove and the same length offset position (213) of said slider boss than al farthest portion (31), said disc tray A stopper rib (24) extending on the back side in the sliding direction of (2) is formed, and the vertical groove portion is formed on the back side in the disc tray sliding direction of the horizontal groove portion (213) from the front toward the back. (211) is formed, and a biasing guide rib (27) is formed in which the end on the near side is further away from the longitudinal groove than the stopper rib (24), and the opening (230, 26) Is formed at a position where the slider boss (31) of the cam slider (3) driven simultaneously with the disc tray (2) can pass when the disc tray (2) slides toward the front. Optical disc apparatus characterized by.

  According to the present invention, even when the operation timing of the disc tray and the traverse chassis is shifted due to impact or vibration during transportation or installation, the timing shift is detected and the original state is restored. An optical disk device that can be restored can be provided.

  In addition, according to the present invention, the optical disc apparatus itself can be automatically restored to its original state without disassembling, adjusting, replacing parts, etc., the operation timing of the disc tray and the traverse chassis. An optical disc device capable of reducing the rate can be provided.

  Furthermore, according to the present invention, there is provided an optical disc apparatus capable of reducing the manufacturing cost of the optical disc apparatus by allowing the operation timing of the disc tray and the traverse chassis to be restored to the initial state with a simple configuration. Can do.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an optical disc apparatus according to the present invention. FIG. 1 is a perspective view of the optical disk device, and FIG. 2 is a schematic configuration diagram of the optical disk device viewed from above. FIG. 3 is a schematic configuration diagram of the inside of the optical disc apparatus as viewed from above, and FIG. 4 is a schematic configuration diagram of the inside of the optical disc device as viewed from below. 5 and 6 are schematic configuration diagrams of the inside of the optical disk apparatus shown in FIG. 3 as viewed from the front panel side and the side. For convenience, in FIGS. 3 to 6, the disc tray itself is omitted, and only a guide groove 21 and a tray rack 22 described later are illustrated.

  The optical disc apparatus A rotates a loaded optical disc and irradiates a recording layer of the optical disc with a laser beam to reproduce and / or record data. As shown in FIG. 1, the optical disc apparatus A is arranged so that the disc tray 2 can enter and exit from a slit-shaped entrance / exit St provided in the front panel Fp of the outer housing Oh.

  The optical disc is loaded with the disc tray 1 protruding outside the optical disc apparatus A from the entrance / exit St, and the disc tray 1 is slid to the back side to insert the optical disc into a position where it can be reproduced / recorded (loading). can do. Further, by sliding the disc tray 1 to the front side and projecting it from the entrance / exit St to the outside of the optical disc apparatus A, the optical disc inserted inside can be ejected (unloaded).

  As shown in FIGS. 2 and 3, the optical disc apparatus A has at least a main chassis 1, a disc tray 2, a cam slider 3, a traverse chassis 4, a driving force transmission mechanism 5, an optical head 6, and an optical disc driving mechanism 7. .

  In the following, for the sake of convenience, the direction in which the front panel Fp is provided is expressed as the front side (F side), and the direction facing the front side is expressed as the back side (B side). In addition, it is orthogonal to the direction extending from the front side to the back side, the right direction in plan view is the right side (R side), and similarly the left direction in plan view is the left side (L side).

  As shown in FIGS. 2 and 3, a disk tray 2 is slidably supported on the main chassis 1, and a traverse chassis 4 is supported to be movable up and down. The main chassis 1 includes a drive gear 11 and a cam slider 3.

  The driving gear 11 is a gear for transmitting the driving force transmitted from the driving force transmission mechanism 7 to the disc tray 2 and the cam slider 3, and is connected to the driving force transmission mechanism 7. The drive gear 11 is pivotally supported at the bottom of the main chassis 1 and connected to the disc tray 2 and the cam slider 3.

  The disc tray 2 is supported by the main chassis 1 so as to slide back and forth between the front side and the back side. As shown in FIG. 4, the disc tray 2 has a guide groove 21 that bends in a stepwise manner on the lower surface, and a tray rack 22 that meshes with the drive gear 11 and transmits a drive force. The guide groove 21 is engaged with a slider boss 31 provided in the cam slider 3 described later. The guide groove 21 is a concave groove surrounded on three sides by a lower surface of the disk tray 2 and a guide rib 23 protruding integrally from the lower surface of the disk tray 2. The guide rib 23 includes a first guide rib 231, a second guide rib 232, and a third guide rib 233.

  The guide groove 21 is connected to the longitudinal groove portion 211 surrounded by the first guide rib 231 extending in the sliding direction of the disc tray 2 (the direction along the line connecting the front side and the back side) and the front side end portion of the first guide rib 231. The skew groove 212 surrounded by the second guide rib 232 formed so as to be bent to the right side at a predetermined angle with respect to the first guide rib 231, and the connecting portion of the second guide rib 232 with the first guide rib 231 It has a lateral groove portion 213 surrounded by a third guide rib 233 that is connected to the opposite side and extends perpendicularly to the right side with respect to the longitudinal groove portion 211.

  A part of the first guide rib 231 arranged on the right side of the disc tray 2 is formed with an opening 230 that does not protrude from the lower surface of the disc tray 2, in other words, is cut into a concave shape. A closing portion 234 that closes the guide rib 23 is formed at the rightmost (innermost) portion of the guide rib 23 that forms the lateral groove portion 213.

  Further, a stopper rib 24 is provided outside the lateral groove portion 213 so as to be connected to the third guide rib 233 and to reinforce the third guide rib 233. The stopper ribs 24 are arranged so as to be orthogonal to the disc tray 2 and have a shape that expands as the disc tray 2 is approached. The stopper rib 24 is formed on the right side (closed portion 234 side) rather than the portion separated from the closed portion 234 on the left side by the radius of the slider boss 31.

  The cam slider 3 is associated with a slider boss 31 (see FIGS. 3 and 5, etc.) that engages with a guide groove 21 formed on the lower surface of the disk tray 2 and a rack boss 623 provided on a sub-rack 622 of the optical head 6 described later. A trigger guide 32 that engages, a cam groove 33 (see FIG. 5) that engages with a sliding boss 42 described later of the traverse chassis 4, and a cam slider rack 34 that meshes with the drive gear 11. The cam slider 3 is disposed on the front side of the main chassis 1 and slides in a direction (left-right direction) orthogonal to the moving direction of the disc tray 2. Further, when the cam slider 3 moves to the rightmost side, movement to the left side is restricted by a stopper (not shown).

  The engagement margin between the slider boss 31 and the guide groove 21 is small (but not limited to this, for example, when the guide groove 21 has a depth of about 5 mm and the slider boss 31 has a height of about 5 mm and the engagement margin is 2 mm to 3 mm). ) Is formed. This is to reduce the thickness of the optical disc apparatus A and to prevent the disc tray 2 and the cam slider 3 from contacting each other.

  The trigger guide 32 has a skew portion 321 formed obliquely with respect to the sliding direction of the cam slider 3 and a side portion 322 extending in parallel with the sliding direction. When the optical head 6 moves to the front side so that the traverse chassis 4 moves to the standby position, the rack boss 623 and the trigger guide 32 are engaged.

  The cam groove 33 has an upper cam groove 331 and a lower cam groove 332, and an inclined cam groove 333 that connects the upper cam groove 331 and the lower cam groove 332. A sliding boss 42 of the traverse chassis 4 passes through the cam groove 33.

  As shown in FIG. 3, the traverse chassis 4 includes a driving force transmission mechanism 5, an optical head 6, and an optical disk driving mechanism 7. The traverse chassis 4 is rotatably supported by the main chassis 1 with a rotation shaft provided on the back side, and moves up and down with respect to the disc tray 2 by rotating about the rotation shaft. The traverse chassis 4 may be attached to the main chassis 1 so as to be movable up and down using a floating rubber, a boss and an attachment hole, and using a gap between the boss and the attachment hole.

  The traverse chassis 4 can be rotated and moved about the rotation axis. When data is reproduced or recorded, it moves up and moves to a position where it holds the optical disk (chucking or chucking position). When the optical disk is ejected, the traverse chassis 4 is lowered and moved to a position where the optical disk is placed on the disk tray 1 (standby position where the optical disk is separated from a turntable described later).

  The driving force transmission mechanism 5 includes a first gear 51, a second gear 52, a third gear 53, and a driving motor 54. Each gear is rotatably supported by the traverse chassis 4. The driving force transmission mechanism 5 transmits the driving force output from the driving motor 54 for reciprocating sliding of the disk tray 2, reciprocating sliding of the optical head 5, sliding of the cam slider 3, and raising / lowering of the traverse chassis 4. It is. A worm gear 542 is attached to the output shaft 541 of the drive motor 54.

  The first gear 51 meshes with the worm gear 542 of the drive motor 54 and is provided at a lower portion (closer to the main chassis 1) to which the driving force is transmitted and meshed with the second gear 52. And a first pinion gear 513 that transmits driving force to the rack 62 of the optical head 6. That is, the first pinion gear 513 is integrally formed so that the first large gear 511 is on the upper side, the first small gear 512 is on the lower side, and the first pinion gear 513 is on the lower side. The second gear 52 meshes with the third gear 53, and the third gear 53 meshes with the drive gear 11. The second gear 52 and the third gear 53 are gears for transmitting a driving force from the first small gear 512 to the driving gear 11, and are pivotally supported on the traverse chassis 4. The driving force transmission mechanism 5 used in this embodiment is provided with different three-axis gears, but is not limited to three, and the driving force output from the driving motor 54 is the driving gear 11. Anything that can be communicated to can be widely adopted.

  The optical head 6 is for reading or recording data by irradiating the optical disk with laser light, an objective lens 61 for irradiating the optical disk with laser light, and a rack 62 to which driving force is transmitted from the driving force transmission mechanism 5. And. Although not shown, optical components such as a laser light source that emits laser light and a light receiving element that receives the laser light reflected by the optical disk and converts it into an electrical signal are arranged. A switch is arranged in the traverse chassis 4. The switch is pushed when the optical head 6 moves to the front side, and the switch is opened when it moves to the back side.

  The rack 62 has a main rack 621 formed integrally with the optical head 6 at the lower portion and a sub-rack 622 disposed at the upper portion so as to overlap the main rack 621. That is, the rack 62 is a double rack in which the main rack 621 and the subrack 622 overlap.

  The main rack 621 meshes with the first pinion gear 513 of the first gear 51. When the driving force is transmitted from the first pinion gear 513 to the main rack 621, the optical head 6 slides. The subrack 622 is slidably attached to the main rack 621. The main rack 621 and the subrack 622 are biased by coil springs (not shown) so that the gear teeth of each rack are displaced in plan view. By energizing the gear teeth of the main rack 621 and the subrack 622 as described above, the gear teeth of the first pinion gear 513, the main rack 621, and the subrack 622 are sandwiched between the gear teeth of the first pinion gear 513. Backlash due to tooth play can be removed.

  In the rack 62, the portion of the subrack 622 where the gear teeth are formed is longer than the portion of the main rack 621 where the gear teeth are formed. The sub-rack 622 is disposed so that the portion where the gear teeth are formed is longer on the back side than the portion where the gear teeth of the main rack 621 are formed. Thus, depending on the position of the optical head 6, the main rack 621 and the subrack 622 are engaged with the first pinion gear 513, and only the subrack 622 is engaged with the first pinion gear 513. In addition, both the main rack 621 and the sub-rack 622 can be in a state where they do not mesh with the first pinion gear 513.

  Further, a rack boss 623 slidably engaged with the trigger guide 32 of the cam slider 3 is formed at the front end of the subrack 622, and the traverse chassis 4 is formed on the opposite side of the gear teeth. When in position, a protrusion for engaging with a locking portion formed on the main chassis 1 is formed. The rack boss 623 is erected in the direction of the disc tray 1.

  The traverse chassis 4 has a sliding boss 42 that engages with the cam groove 33 of the cam slider 3, and the sliding boss 42 is slid in the cam groove 33 in conjunction with the movement of the cam slider 3. 4 is raised and lowered. That is, when the cam slider 3 is slid and the sliding boss 42 moves so as to penetrate the upper cam groove 331, the traverse chassis 4 rises, and when it moves so as to penetrate the lower cam groove 332, the traverse chassis 4 descends. .

    The locking part protrudes from the bottom part of the main chassis 1 and has a rectangular parallelepiped shape extending in the left-right direction. When the traverse chassis 4 moves up and down, the optical head 6 is disposed on the most front side. In this state, when the traverse chassis 4 moves to the standby position, the protruding portion formed on the subrack 622 is engaged with the locking portion, and the movement of the optical head 6 toward the back side is restricted. Further, when the traverse chassis 4 rises and moves to the chucking position, the engagement between the locking portion and the protruding portion is released, and the optical head 6 can be moved to the back side.

  The optical disk drive mechanism 7 has a turntable 71 for supporting the optical disk, a spindle motor 72 for driving the turntable 71, and a clamp 73 provided on the main chassis 1. As the traverse chassis 4 rises, the turntable 71 passes through a through hole formed in the center of the optical disc and lifts the optical disc. At this time, the clamp 73 has a permanent magnet (not shown) and the turntable 71 has a yoke (not shown) that receives a magnetic force, and attracts each other by the magnetic force to firmly clamp the optical disk (chuck). King). The spindle motor 72 is a motor that rotates the chucked optical disk.

<About movement of optical head>
The movement of the optical head 6 in the optical disc apparatus A of the present invention will be described. For example, consider the case where playback of an optical disk such as a DVD is finished and the optical disk is taken out (unloaded) from the optical disk apparatus A, that is, the disk tray 2 is opened. When the traverse chassis 4 moves, the optical head 6 retreats to the innermost side (front side of the optical disc apparatus) with respect to the optical disc.

  The drive motor 54 is driven to rotate the first large gear 511 engaged with the worm gear 542 in the A1 direction. The first pinion gear 513 that is connected to (connected to) the first large gear 511 also rotates in the A1 direction, and a rack 62 (main rack 621, subrack 622) that meshes with the first pinion gear 513 is provided. Move in the B1 direction. As the rack 62 moves, the optical head 6 including the rack 62 also moves in the B1 direction.

  The worm gear 542 and the first large gear 511, the first small gear 512 and the second gear 52, the second gear 52 and the third gear 53, and the third gear 53 and the drive gear 11 are always in mesh, and the drive gear 11 The drive force from the drive motor 54 is always transmitted to the drive gear 11, and the drive gear 11 rotates in the direction D1. At this time, the cam slider 3 is restricted from moving in the left-right direction by a stopper (not shown). At this time, the cam slider rack 34 is not meshed with the drive gear 11 and the cam slider 3 is stopped.

<Switching the movement of the traverse unit from driving the optical disk>
When the optical head 6 reaches a predetermined position on the inner circumference side (front side) of the optical disk, the main rack 621 and the first small gear 512 of the rack 62 are disengaged, and the subrack 622 and the first small gear 512 are Is in a meshed state. When the drive motor 54 is further driven in this state, only the subrack 622 moves to the front side.

  The rack boss 623 erected on the subrack 622 is engaged with the trigger guide 32, and the subrack 622 moves to push the oblique portion 321 of the trigger guide 32. As a result, the cam slider 3 moves, the cam slider rack 34 and the drive gear 11 mesh, the drive force of the drive gear 11 is transmitted to the cam slider rack 34, and the cam slider 3 moves in the C1 direction.

  As the cam slider 3 moves, the rack boss 623 is pushed by the oblique portion 321 of the trigger guide 32 and the subrack 622 moves to the front side, and the subrack 622 and the first pinion gear 513 are disengaged. When the cam slider 3 further moves, the rack boss 623 moves to the side portion 322 and restricts the movement of the subrack 622 in the rear side direction. That is, the mesh between the main rack 621 and the first pinion gear 513 is disengaged, and then the subrack 622 moves further to the front side (inner side of the optical disk), the cam slider 3 starts operating, and the subrack 622 is moved. And the first pinion gear 513 are disengaged, and the optical head 6 is completely stopped.

<About the traverse unit movement (descent) to the standby position>
The driving force is transmitted to the cam slider rack 3 by the engagement of the driving gear 11 and the cam slider rack 34. Thereby, the cam slider 3 moves in the direction away from the drive gear 11 (C1 direction).

  A sliding boss 42 of the traverse chassis 4 passes through the cam groove 33 of the cam slider 3, and the sliding boss 42 is linked with the movement of the cam slider 3 so that the sliding boss 42 has an upper cam groove 331, an inclined cam groove 333, and a lower cam groove. Move in the order of 332. As the sliding boss 42 moves, the traverse chassis 4 descends in the E1 direction. As a result, the traverse chassis 4 is lowered. At this time, the sub-rack 622 of the optical head 6 protrudes from the front side end of the traverse chassis 4.

  When the cam slider 3 starts to move with the driving force transmitted from the driving gear 11, the rack boss 623 formed on the subrack 622 is engaged with the side portion 322 of the trigger guide 32. When the cam slider 3 moves and the traverse chassis 4 is lowered, the rack boss 623 and the trigger guide 32 are disengaged from the side portion 322. However, when the traverse chassis 4 descends, the protrusions formed on the subrack 622 engage with the locking parts protruding from the bottom surface of the main chassis 1, and the back direction of the subrack 622 and the optical head 6 Restrict movement to

<Switching from moving the traverse unit to moving the disc tray>
The slider boss 31 of the cam slider 3 is engaged with the lateral groove portion 213 of the guide groove 21 until the traverse chassis 4 moves to the standby position, and the inside of the lateral groove portion 213 is moved to C1 in accordance with the movement of the cam slider 3 in the C1 direction. Move in the direction. At substantially the same time as the traverse chassis 4 has moved to the standby position, the slider boss 31 reaches the connecting portion between the lateral groove portion 213 and the oblique groove portion 212 of the guide groove 21. Even after the traverse chassis 4 is lowered to the standby position, the cam slider 3 slides in the C1 direction until the end of the lower cam groove 332 approaches or contacts the sliding boss 42.

  As the cam slider 3 moves, the slider boss 31 pushes the oblique groove 212 of the guide groove 21. When the skew groove 212 is pushed, the disc tray 2 moves in the F1 direction (front direction). When the disk tray 2 is pushed by the slider boss 31 and moves in the F1 direction, the tray rack 22 also moves simultaneously and meshes with the drive gear 11. At the same time that the tray rack 22 and the drive gear 11 are engaged, the engagement between the cam slider rack 34 of the cam slider 3 and the drive gear 11 is released.

<About disc tray movement (tray open) (see FIG. 13)>
When the tray rack 22 and the drive gear 11 mesh with each other, the tray rack 12 also moves in the F1 direction as the drive gear 11 rotates in the D1 direction. That is, the disc tray 2 moves to the front side, and the disc tray 2 is discharged from the slit-shaped entrance / exit St of the front panel Fp. At this time, the slider boss 31 of the cam slider 3 is engaged with the vertical groove portion 211 of the guide groove 21 and restricts the movement of the cam slider 3 in the side direction.

  As described above, in the disk apparatus A, the disk tray 2, the traverse chassis 4, and the optical head 6 can be operated by the rotation of one drive motor 54. In the above example, the series of operations related to the opening of the disk tray 2, the lowering of the traverse chassis 4 and the movement of the optical head 6 toward the inner periphery of the optical disk has been described. However, the drive motor 54 is moved in the opposite direction to the above. By rotating, each part rotates or moves in the direction opposite to the A1 to F1 directions. As a result, it is possible to perform operations related to closing of the disc tray 2, raising of the traverse chassis 4, and movement of the optical head 6 to the outer peripheral side of the optical disc.

  Next, an operation when an impact or vibration is applied during transportation or installation and the engagement between the guide groove and the slider boss is released will be described. 7, 8, and 9 are schematic views showing a process in which the slider boss returns to the guide groove from the state in which the slider boss of the optical disk apparatus shown in FIG. 2 is detached from the guide groove. 7, 8, and 9 show the disk tray 2, the cam slider 3, and the drive gear 11. For convenience, the disk tray 2 omits the disk tray itself, and includes only a guide groove 21 and a tray rack 22 described later. It is shown.

  When the optical disc apparatus A is moved by transportation, installation, etc., the disc tray 2 is usually in a state of being stored in the main chassis 1 (see FIG. 2 and the like). The optical disc apparatus A is provided with a stopper (not shown) to prevent the disc tray 2 from moving further to the back side. At this time, when an impact and / or vibration is applied from the outside of the optical disc apparatus A, the disc tray 2 is urged to the front side, and as shown in FIG. 7, the slider boss 31 moves the third guide rib 233 to the back side. get over.

  When the disc tray 2 is at the rearmost side (stored in the optical disc apparatus A), the slide rack 3 is moved to the rightmost side. At this time, the cam slider 3 is in contact with a stop member (not shown), and the cam slider 3 does not move further to the right. When the slider boss 31 gets over the third guide rib 233 in this state (see FIG. 7), the slider boss 31 comes into contact with the stopper rib 24 formed outside the lateral groove portion 213 of the third guide rib 233. Since the cam slider 3 does not move further to the right side, the slider boss 31 is pushed by the stopper rib 24, and the cam slider 3 stops in a state of moving to the left side. At this time, the cam slider rack 34 is engaged with the drive gear 11.

  Further, since the slider boss 31 gets over the third guide rib 233 to the back side, the disc tray 2 is pushed by the slider boss 31 and stopped in a state of moving to the front side. At this time, the tray rack 22 of the disk tray 2 is engaged with the drive gear 11.

  In this state, when the optical disk apparatus A is powered on, the drive motor 54 is rotated in the direction in which the optical head 6 moves to the back side. The slider boss 31 is blocked by the stopper rib 234, and the movement of the cam slider 3 to the left side is restricted. At this time, since the trigger guide 32 is engaged with the rack boss 623 and the movement of the rack boss 623 in the back direction is restricted, the optical head 6 cannot move to the back side and the switch is not opened. When a predetermined time elapses after the drive motor 54 starts to drive, the optical disc apparatus A recognizes that the slider boss 31 has passed over the third guide rib 233 and slides the disc tray 2 to the front side. In this manner, the drive motor 54 is driven (disc tray opening operation).

  The tray rack 22 and the cam slider rack 34 are engaged with the drive gear 11, and the disc tray 2 slides to the front side and the cam slider rack 34 slides to the left side (see FIG. 8). The opening 230 of the first guide rib 231 is formed at a position where the slider boss 31 can pass along with the movement of the cam slider 3 of the first guide rib 231. The movement of the cam slider 3 and the movement of the disc tray 2 are synchronized. When the cam slider 3 moves to the left, the slider boss 31 passes through the opening 230 and is stored in the vertical groove 211 (see FIG. 9).

  As described above, the optical disc apparatus A automatically detects that the slider boss 31 has passed over the guide rib 23 and slides the disc tray 2 to the front side so that the slider boss 31 can guide the guide. It can be modified to slide in the groove 21.

  Further, the length of the opening 230 is such that when the slider boss 31 returns to the guide groove 21, even if the timing of the operation of the disc tray 2 and the cam slider 3 is slightly shifted, It is desirable that the length of the slider boss 31 is such that the slider boss 31 does not easily fall off from the opening during normal operation in which the slider boss 31 slides in the guide groove 21.

  Even if the slider boss 31 is detached from the guide groove 21 during normal operation, the slider boss 31 contacts the auxiliary rib 24 and the slider rack 3 does not move further to the right. At this time, since the rack boss 623 is engaged with the trigger guide 32 and the optical head 6 does not move to the back side, the switch is not opened, and the optical disc apparatus A performs a closing operation for closing the disc tray 2 after a predetermined time has elapsed. It is determined that the slider boss 31 has passed over the guide rib 23 without finishing. Thereafter, the slider boss 31 is driven back into the guide groove 21 using the method described above.

  FIG. 10 shows a plan view of another example of the optical disc apparatus according to the present invention. The optical disc apparatus shown in FIG. 10 has the same configuration as the optical disc apparatus A shown in FIG. 2 and the like except for the guide ribs, and substantially the same parts are denoted by the same reference numerals.

  The first guide rib 251 surrounding the vertical groove 211 of the optical disc apparatus B shown in FIG. 10 has a drop-off prevention part 261 formed so that the back side of the opening 26 extends toward the front side, and an end on the front side. It has a lead-in part 262 formed so as to be folded and contact with the third guide rib 253 surrounding the lateral groove part 213.

  When the slider boss 31 gets over the third guide rib 253 and the cam slider rack 34 meshes with the drive gear 11, but the tray rack 22 does not mesh with the drive gear 11, the cam slider 3 becomes the cam slider rack. 34 receives the driving force from the drive gear 11 and slides to the left side. However, since the tray rack 22 is not in mesh with the drive gear 11, the disk tray 2 remains stopped. When the cam slider 3 slides to the left, the slider boss 31 comes into contact with the drawing portion 262, and the slider boss 31 pushes the drawing portion 262, the disc tray 2 is pushed to the front side. Thereby, the tray rack 22 meshes with the drive gear 11. The disc tray 2 receives the driving force from the driving gear 11 and slides to the front side.

  The cam slider 3 is configured such that the engagement between the cam slider rack 34 and the drive gear 11 is disengaged when the slider boss 31 approaches the longitudinal groove 21. The cam slider 3 moves with inertia after the engagement with the cam slider rack 34 is disengaged. However, the slider boss 31 moves in a state where it is always in contact with the retracting portion 262, so that the cam slider 3 cannot move so much due to inertia, and the first guide groove. Cannot reach 211. In this state, when the disc tray 2 slides to the front side, the slider boss 31 comes into contact with the drop-off prevention portion 261 and is pushed to the left side, and is drawn into the first guide groove 211. In this way, the slider boss 31 returns to the guide groove 21, and the drive of the disc tray 2, the cam slider 3, and the traverse chassis 4 is normally performed.

  Further, the drop-off prevention unit 261 has an effect of preventing the slider boss 31 from coming into contact with the end portion of the opening 26 when the disc tray 2 slides to the front side, and the disc tray 2 from shaking to the left and right. Yes. The drop-off prevention part 261 and the lead-in part 262 shown in FIG. 10 are formed in a straight line, but are not limited thereto, those formed in a curved line, those formed in a polygonal line, etc. A shape that allows the slider boss 31 to smoothly return to the guide groove 21 through the opening 26 can be widely employed.

  FIG. 11 is a plan view of still another example of the optical disc apparatus according to the present invention. The optical disk apparatus C shown in FIG. 11 has substantially the same configuration as the optical disk apparatus A shown in FIG. 2 and the like except that the urging guide rib 27 is provided, and the same reference numerals are given to substantially the same parts. The urging guide rib 27 protrudes integrally from the lower surface of the disc tray 2. The biasing guide rib 27 is formed so as to approach the first guide rib 231 from the front side toward the back side. The urging guide rib 27 is formed so that the front end is positioned on the right side of the stopper rib 24.

  Consider a case in which the slider boss 31 gets over the third guide rib 253, the cam slider rack 34 is not meshed with the drive gear 11, and the tray rack 22 is meshed with the drive gear 11. At this time, when the drive gear 11 is rotated, the disc tray 2 slides to the front side with the tray rack 22 receiving the drive force from the drive gear 11, but the cam slider 3 remains stopped. When the disc tray 2 slides to the front side, the slider boss 31 contacts the urging guide rib 27. When the disc tray 2 slides to the front side while the biasing guide rib 27 and the slider boss 31 are in contact, the slider boss 31 is biased toward the left side, the cam slider 3 slides toward the left side, and the cam slider. The rack 34 meshes with the drive gear 11.

  Since the cam slider rack 34 meshes with the drive gear 11, the cam slider 3 slides to the left by the driving force of the drive gear 11. Thereafter, like the operation of the optical disc apparatus A, the disc tray 2 slides to the front side and the cam slider 3 slides to the left side, and the slider boss 31 returns to the inside of the guide groove 21.

  As described above, even when the tray rack 22 of the disc tray 2 and the cam slider rack 34 of the cam slider 3 do not operate at the timing as designed due to manufacturing errors or assembly errors, the drop prevention unit 261 shown in the optical disc apparatus B, By attaching the pull-in portion 262 and the urging guide rib 27 shown in the optical disc apparatus C, it is possible to reduce operation errors due to errors.

  By using the optical disk apparatuses A, B, and C as described above, even when the slide boss 31 is detached from the guide groove 21, the optical disk apparatus itself detects a defect and automatically corrects it. Can save time and effort. Moreover, since the malfunction is automatically corrected, the occurrence rate of defective products is reduced. Furthermore, even if the slide boss 31 is used in harsh usage conditions and the slide boss 31 may come off from the guide groove 21 as described above, the optical disk device can be used in more places because it is automatically corrected. Is possible.

  In addition, since no new member is used, the process and time required for designing, prototyping, and manufacturing the new member can be shortened, and the above-described slide boss 31 is inserted into the guide groove while suppressing an increase in cost. It is possible to provide an optical disc apparatus capable of performing the correction to return to 21.

  As mentioned above, although embodiment of invention was described concretely, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary. A plurality of features described in each embodiment may be provided.

  The present invention can be applied to an optical disc apparatus using an optical disc such as a DVD or CD as a recording medium.

1 is a perspective view of an optical disc apparatus according to the present invention. 1 is a schematic plan view of the inside of an optical disc apparatus according to the present invention. FIG. 3 is a schematic configuration diagram in which a main chassis and a disc tray are omitted from the optical disc apparatus shown in FIG. 2. It is a schematic block diagram inside an optical disk device seen from below. It is a schematic block diagram inside the optical disk device seen from the front panel side. It is a schematic block diagram inside an optical disc device seen from the side. It is a figure of the state which the slider boss | hub of the optical disk device removed from the guide groove. It is a figure which shows the state which a slider boss returns to a guide groove. It is a figure which shows the state which the slider boss returned to the guide groove. It is a top view of the other example of the optical disk device concerning this invention. FIG. 12 is a plan view of still another example of the optical disc apparatus according to the present invention. It is a perspective view of the conventional optical disk apparatus. It is a schematic plan view of a conventional optical disc apparatus. It is the schematic block diagram which looked at the inside of the conventional optical disk apparatus from upper direction.

Explanation of symbols

A, B, C Optical disc apparatus 1 Main chassis 11 Drive gear 2 Disc tray 21 Guide groove 22 Tray rack 3 Cam slider 31 Slider boss 32 Trigger guide 33 Cam groove 34 Cam slider 4 Traverse chassis 42 Sliding boss 5 Driving force transmission mechanism 51 First Gear 511 First large gear 512 First small gear 513 First pinion gear 52 Second gear 53 Third gear 54 Drive motor 541 Output shaft 542 Worm gear 6 Optical head 61 Objective lens 62 Rack 621 Main rack 622 Subrack 623 Rack boss 7 Optical disc Drive mechanism 71 Turntable 72 Spindle motor 73 Clamp

Claims (4)

The main chassis,
A disc tray on which an optical disc is placed and reciprocally slid relative to the main chassis to carry the optical disc in and out;
A traverse chassis that is attached to the main chassis and moves up and down with respect to the disc tray, and sandwiches or opens an optical disc carried in the disc tray;
A cam slider that is slidably attached to the main chassis in a direction perpendicular to the sliding direction of the disk tray, and that raises and lowers the traverse chassis;
The main chassis is pivotally supported, and has a drive gear for transmitting a driving force to the disk tray and the cam slider,
The disk tray includes a tray rack that meshes with the drive gear and extends in a sliding direction, and a guide groove that is loosely fitted with a cylindrical slider boss projecting from the cam slider and is bent at the front side.
The cam slider includes a cam slider rack for meshing with the drive gear ,
Is irradiated with a laser beam before Symbol optical disk An optical disk apparatus for reproducing or recording data,
The guide groove is formed by a lower surface of the disc tray, an outer guide rib formed on the bent outer side of the guide groove integrally projecting from the lower surface, and an inner guide rib formed on the bent inner side, The guide groove is connected to the longitudinal groove portion along the sliding direction of the disk tray, the lateral groove portion orthogonal to the sliding direction, and the front end of the longitudinal groove portion, and is connected to the longitudinal groove portion and the lateral groove portion. With a groove part,
The inner guide rib that forms the vertical groove portion has an opening formed by dividing the inner guide rib, and a dropout formed on the back side of the opening portion away from the vertical groove portion toward the front. A preventing portion, and a pull-in portion connected to the inner guide rib forming the lateral groove portion at the front end portion;
The lateral groove, the guide groove and a continuously provided by ribs on the opposite side, the farthest radius same length deviation of the slider boss than the portion from the longitudinal groove portions of the lateral groove portion of the inner guide rib It was between position and the vertical groove of the lateral groove portion of the farthest portion, said and stopper ribs extending in the back side of the sliding direction of the disk tray are formed,
Attached to the back side of the horizontal groove part in the disc tray sliding direction is an approaching from the front to the back of the vertical groove part, and an end on the front side is formed farther from the vertical groove part than the stopper rib. Force guide ribs are formed,
Said opening when said disc tray slides toward the front, the optical disk apparatus characterized in that said slider boss of the cam slider driving the disc tray at the same time is formed at a position capable of passing . A disc tray on which an optical disc is placed and reciprocally slid to carry in and out the optical disc;
A traverse chassis for sandwiching or releasing the optical disc carried in the disc tray;
A cam slider that slides in a direction perpendicular to the sliding direction of the disk tray and raises and lowers the traverse chassis;
The disc tray and a drive gear for transmitting a driving force to the cam slider, the disc tray engaging with the drive gear and extending in a sliding direction; and a columnar shape projecting from the cam slider. The slider boss is loosely fitted and has a guide groove bent on the front side.
The cam slider includes a cam slider rack for meshing with the drive gear ,
Is irradiated with a laser beam before Symbol optical disk An optical disk apparatus for reproducing or recording data,
The guide groove is formed by a lower surface of the disc tray, an outer guide rib formed on the bent outer side of the guide groove, and an inner guide rib formed on the bent inner side, and the guide groove is slid on the disc tray. A longitudinal groove along the moving direction, a transverse groove perpendicular to the sliding direction, and a skewed groove connected to the front end of the longitudinal groove and connecting the longitudinal groove and the transverse groove,
The inner guide rib that forms the longitudinal groove portion has an opening formed by dividing the inner guide rib,
The lateral groove, the guide groove and a continuously provided by ribs on the opposite side, the farthest radius same length deviation of the slider boss than the portion from the longitudinal groove portions of the lateral groove portion of the inner guide rib It was between position and the vertical groove of the lateral groove portion of the farthest portion, said and stopper ribs extending in the back side of the sliding direction of the disk tray are formed,
Said opening when said disc tray slides toward the front, the optical disk apparatus characterized in that said slider boss of the cam slider driving the disc tray at the same time is formed at a position capable of passing . Back end portion of the opening and a pull portion connecting the formed disengagement prevention part away from said longitudinal groove toward the front, the inner guide ribs forming the lateral groove portion and the end portion of the front side The optical disk apparatus according to claim 2, wherein   Attached to the back side of the horizontal groove part in the disc tray sliding direction is an approaching from the front to the back of the vertical groove part, and an end on the front side is formed farther from the vertical groove part than the stopper rib. 3. The optical disk apparatus according to claim 2, wherein a force guide rib is formed.

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