JP6222339B2 - Optical disk device - Google Patents

Description

  The present invention relates to an optical disc apparatus.

  Optical disc apparatuses for reproducing optical discs are widely used. An optical disk device includes a main chassis, a tray on which an optical disk is mounted, a traverse chassis on which an optical pickup and a turntable are mounted, a cam slider that swings the traverse chassis up and down, a drive motor, and the driving force of the drive motor. And a gear for transmitting to the rack of the tray and the rack of the cam slider.

  The operation when closing the tray will be described below. When the tray is in the insertion / removal position (position where the optical disk is inserted / removed), if the driving force from the drive motor is transmitted to the rack of the tray via the gear, the tray is stored in the storage position (optical disk is stored in the apparatus) It is transported toward (position). Thereafter, the driving force of the driving motor is also transmitted to the rack of the cam slider to raise the traverse chassis.

  When the tray is in the insertion / removal position and when the tray is being conveyed, the engaging portion of the optical pickup rack and the engaging portion of the main chassis are engaged (see FIG. 9). The gear does not mesh. As a result, the driving force of the driving motor is not transmitted to the rack of the optical pickup before the tray reaches the storage position, and the movement of the optical pickup is restricted.

  On the other hand, when the tray reaches the storage position and the traverse chassis reaches the highest position, the optical disk is chucked on the turntable. At the same time, the engaging portion of the rack of the optical pickup is disengaged from the engaging portion of the main chassis (see FIG. 10), and the optical pickup rack and the gear for transmitting the driving force of the drive motor to the optical pickup rack are provided. Mesh.

  As a result, the driving force of the driving motor is transmitted to the rack of the optical pickup. The tray has an opening for exposing the information recording surface of the optical disc, and the optical pickup can move to a predetermined position without interfering with the tray by moving in the radial direction of the optical disc within the opening of the tray. is there.

  In general, the optical disk apparatus uses the same driving force of the drive motor when the tray is transported from the insertion / removal position to the storage position and when the tray is transported from the storage position to the insertion / removal position. Therefore, it is necessary to accurately detect whether the tray is in the insertion / removal position or the storage position, and to drive the drive motor so as to move the tray from one position to the other position.

  Therefore, the optical disk apparatus includes a switch. When the tray is in the insertion / removal position, the optical pickup rack detects that the tray is in the insertion / removal position by pressing the switch. On the other hand, when the tray is in the storage position, the rack of the optical pickup does not press the switch, so that it is detected that the tray is in the storage position.

  By the way, if the conventional optical disk apparatus is in a normal operation, the switch is turned on when the tray is in the insertion / removal position and the engaging portion of the rack of the optical pickup is engaged with the engaging portion of the main chassis. The switch is turned off when the engaging portion of the rack of the optical pickup is disengaged from the engaging portion of the main chassis in the storage position. However, if a strong impact is applied while the tray is in the insertion / removal position and the engaging portion of the optical pickup rack and the engaging portion of the main chassis are engaged, the engaging portion of the optical pickup rack and the main chassis The switch is turned on when the engagement portion is disengaged (that is, the switch is kept on).

  Further, when the engaging portion of the rack of the optical pickup is disengaged from the engaging portion of the main chassis, the driving force of the driving motor is transmitted to the optical pickup even if the tray has not reached the storage position. Therefore, when the tray is instructed by the user in such a state, the optical pickup moves as the tray is transported. Then, since the optical pickup first reaches a predetermined position (for example, an optical disk reading position), there is a problem in that the transport of the tray is finished before the tray reaches the storage position.

  Therefore, for example, the optical disc apparatus of Patent Document 1 includes a stopper (lock release prevention means) that stops the optical pickup so that the optical pickup does not separate from the turntable. This prevents the optical pickup from being unlocked by an external force such as vibration or impact when the optical disk is unchucked.

JP 2007-242109 A

  However, if the optical disc apparatus is provided with a lock release prevention means, the number of parts increases and the cost increases. Further, in the optical disc apparatus that does not include the lock release prevention means, the problem that the malfunction occurs due to the unlocking of the optical pickup still cannot be solved.

  An object of the present invention is to provide an optical disc apparatus that can be used even when the lock of an optical pickup is released in a state where chucking of the optical disc is released.

  In order to achieve the above object, an optical disc apparatus according to the present invention includes a main chassis having an engaging portion, a drive motor as a power source, and a sliding force between the insertion / removal position and the storage position by receiving the driving force of the drive motor. A moving tray, an optical pickup that illuminates an optical disk mounted on the tray, an optical pickup rack that has an engaging portion and transmits a power source of the drive motor to the optical pickup, and a main chassis When the engaging portion engages with the engaging portion of the rack of the optical pickup, it is detected that the tray is open by the rack of the optical pickup, and the engaging portion of the main chassis and the light are detected. When the engagement of the pickup rack with the engaging portion of the pickup is disengaged, it is not turned on by the optical pickup rack, so that the tray is closed. A switch that detects that the tray is in a closed state, and a controller that transports the tray to a storage position when the switch is off and the switch is not turned on within a predetermined time after an instruction to open the tray is given. It is characterized by providing.

  According to the above configuration, the engagement between the rack of the optical pickup and the engagement of the main chassis is disengaged due to external forces such as impact and vibration, even though the tray has not reached the storage position. Also, the abnormality is detected and the tray is conveyed to the storage position. Therefore, even if the optical pickup is unlocked in a state where the chucking of the optical disk is released (the optical pickup rack engaging portion and the main chassis engaging portion even though the tray has not reached the storage position). The optical disk device can be used continuously without requiring repair or the like.

  In the optical disk apparatus having the above-described configuration, an interference portion is provided, and the engagement portion of the main chassis and the engagement portion of the rack of the optical pickup are disengaged before the tray reaches the storage position. It is desirable that the switch is not turned on because the rack of the optical pickup interferes with the interference portion.

  According to this configuration, the rack of the optical pickup interferes with the interference portion when the engagement between the engagement portion of the main chassis and the engagement portion of the rack of the optical pickup is released before the tray reaches the storage position. Therefore, it can be easily detected that an abnormality has occurred (that is, the engagement of both engaging portions is disengaged even though the tray is not in the storage position).

  In the optical disk apparatus having the above configuration, it is preferable that the interference portion is formed at an engagement portion of the main chassis.

  According to this configuration, the interference part is formed in the engaging part of the main chassis. By forming the interference part on the main chassis having a high rigidity and being a fixed part, the interference part can be reliably interfered with the rack of the optical pickup at the time of abnormality.

  In the optical disk apparatus having the above-described configuration, it is preferable that the tray is transported to the storage position by the driving force of the driving motor.

  According to this configuration, the tray can be transported to the storage position by the drive motor without the need for additional components, so the cost does not increase.

  In the optical disk apparatus having the above-described configuration, the drive motor is applied to transport the tray to the storage position when the engagement portion of the main chassis and the engagement portion of the rack of the optical pickup are disengaged. The drive voltage applied is applied to the drive motor for transporting the tray to the storage position when the engagement portion of the main chassis and the engagement portion of the rack of the optical pickup are engaged. It is desirable that the voltage is higher than the voltage.

  According to this configuration, the drive motor is applied to transport the tray to the storage position when an abnormality occurs (the engagement between the engagement portions is released even though the tray has not reached the storage position). The drive voltage is higher than the drive voltage applied to the drive motor to transport the tray to the storage position when it is normal (when the tray is in the storage position and disengaged from both engaging portions). That is, the driving force of the drive motor is stronger at the time of abnormality than at the time of normality. Therefore, it becomes easy to move the tray to the storage position.

  The optical disk apparatus having the above-described configuration further includes a driving force transmission mechanism that transmits the driving force of the driving motor to the optical pickup rack, and the optical pickup rack and the driving force when the optical pickup reaches a reference position. It is desirable that the tray is transported to the storage position by transporting the tray to the storage position with the transmission gear mechanism skipped.

  According to this configuration, even when the optical pickup has reached the reference position (particularly when the reference position is a stroke end far from the turntable), the tray has not reached the storage position. By shifting the rack and the driving force transmission gear mechanism, the tray is conveyed to a normal position (that is, the storage position) without changing the position of the optical pickup. Thereby, the tray can be transported to the storage position.

  The optical disk apparatus having the above-described configuration further includes a driving force transmission mechanism that transmits the driving force of the driving motor to the optical pickup rack, and the optical pickup rack and the driving force when the optical pickup reaches a reference position. It is desirable that the tray is transported to the storage position with the transmission gear mechanism engaged, and then the tray is transported to the storage position by returning the optical pickup to the reference position.

  According to this configuration, even when the optical pickup reaches the reference position (particularly when the reference position is an arbitrary position between both stroke ends), the tray does not reach the storage position. While the rack of the optical pickup and the driving force transmission gear mechanism are engaged, the tray is transported to a normal position (that is, the storage position) while changing the position of the optical pickup, and then the optical pickup returns to the reference position. . Thereby, the tray can be transported to the storage position.

  According to the present invention, the engagement between the rack of the optical pickup and the engagement of the main chassis is disengaged due to external forces such as impact and vibration, even though the tray has not reached the storage position. Also, the abnormality is detected and the tray is conveyed to the storage position. Therefore, even if the optical pickup is unlocked in a state where the chucking of the optical disk is released (the optical pickup rack engaging portion and the main chassis engaging portion even though the tray has not reached the storage position). The optical disk device can be used continuously without requiring repair or the like.

The top view which shows the structure of the disk loader of the optical disk apparatus of this invention The rear view which shows the structure of the disk loader of the optical disk apparatus of this invention The front view which shows the structure of the disk loader of the optical disk apparatus of this invention The expansion schematic diagram which shows the state which the engaging part of the rack of an optical pick-up and the engaging part of a main chassis are not engaging. Magnified schematic diagram showing the state of meshing of optical pickup rack and gear The block diagram which shows the structure of the optical disk apparatus of this invention Diagram showing the positional relationship between the switch and optical pickup rack First flowchart showing an example of processing performed by the optical disc apparatus of the present invention An enlarged schematic view showing a state in which the engaging portion of the rack of the optical pickup and the engaging portion of the main chassis are engaged in the conventional optical disc apparatus. The enlarged schematic diagram which shows the state which the engaging part of the rack of an optical pick-up and the engaging part of a main chassis are not engaging in the conventional optical disk apparatus.

  The optical disk device of the present invention will be described below with reference to the drawings. However, the embodiment described below shows an example of the optical disk apparatus of the present invention in order to embody the technical idea of the present invention, and is not intended to specify the present invention to this optical disk apparatus. Rather, it is equally applicable to the apparatus of other embodiments within the scope of the claims.

  Hereinafter, the present embodiment will be described with reference to the drawings. FIG. 1 is a top view showing a configuration of a disk loader of the optical disk apparatus according to the present embodiment. FIG. 2 is a rear view showing the configuration of the disk loader of the optical disk apparatus according to the present embodiment. FIG. 3 is a front view showing the configuration of the disk loader of the optical disk apparatus. 1 to 3 show the disk loader 1 when the tray 3 is in the insertion / removal position. In the following description, “front and back” refers to “front” on the insertion / removal position side and “rear” on the storage position side in the transport direction of the tray 3. Further, “upper and lower” means “upward” in the direction in which the traverse chassis 4 is moved up and down and away from the tray 3 (the optical disk placed on the tray 3) in the direction approaching the tray 3 (the optical disk placed on the tray 3). The direction is “down”. In the “left and right”, the left hand side is “left” and the right hand side is “right” with respect to the paper surface of FIG.

  As shown in FIGS. 1 to 3, the disk loader 1 is a tray (with a main chassis 2 and an optical disk mounted thereon, which slides between an optical disk insertion / removal position and an optical disk storage position with respect to the main chassis 2. A disc tray 3, a traverse chassis 4 attached to the main chassis 2 so as to be slidable up and down, and a cam slider 5 for sliding the traverse chassis 4 up and down.

  The main chassis 2 is fixed to an optical disk device main body (housing) (not shown). Above the main chassis 2, a substantially long clamper holder 21 is installed in the left-right direction (perpendicular to the conveying direction of the tray 3), and a substantially disc-like clamper 6 rotates at the approximate center. It is provided as possible. The main chassis 2 further has an engaging portion 22 at its front portion that engages with an engaging portion 121 of an optical pickup rack (OPU rack) 12 described later.

  The tray 3 has a placement portion 31 on which a disk is placed, a tray rack 32 that is a rack gear extending in the length direction of the tray 3, and a guide groove 33 formed on the back surface (lower surface) of the tray 3. The mounting portion 31 is formed so that a small-diameter (diameter 8 cm) optical disc and a large-diameter (12 cm) optical disc can be placed thereon. A rectangular opening 34 is formed in the tray 3.

  The tray rack 32 is formed at the right end of the tray 3. When the tray rack 32 is engaged with a gear 8 described later, the rotational force of the gear 8 (that is, the driving force of the driving motor 7) is transmitted to the tray 3, and the tray 3 slides. The tray rack 32 is formed so as not to mesh with the gear 8 when the tray 3 is in the storage position. Thereby, after the tray 3 reaches the storage position, the optical pickup 9 can be moved in the radial direction of the optical disk (details will be described later).

  Two guide grooves 33 are formed on the back surface of the tray 3. The slider boss 51 of the cam slider 5 is engaged with any of the guide grooves 33. In the present embodiment, one guide groove 33 is formed in a long shape, and the other guide groove 33 is formed in a short shape as the opening 34 is formed.

  The slider boss 51 is formed so as to engage with different portions of the guide groove 33 as the tray 3 is conveyed. More specifically, the guide groove 33 includes a linear groove portion 331 that is formed in parallel with the conveyance direction of the tray 3, a skew groove portion 332 that is formed obliquely with respect to the conveyance direction of the tray 3, and a conveyance direction of the tray. (However, for the reason described above, only one guide groove 33 has the straight groove portion 331 in the present embodiment).

  Then, as the tray 3 is conveyed from the insertion / removal position to the storage position, the slider boss 51 engages in the order of the linear groove portion 331, the oblique groove portion 332, and the orthogonal groove portion 333. While the slider boss 51 is engaged with the linear groove portion 331, vibration or the like during conveyance of the tray 3 is reduced.

  The traverse chassis 4 includes a driving motor 7, a plurality of gears (driving force transmission gear mechanism) 8 for transmitting a driving force of the driving motor 7 to a tray rack 32, a slider rack 52 described later, and an OPU rack 12 described later, and an information recording surface of an optical disc. An optical pickup 9 that records and reproduces information by irradiating a laser beam, a turntable 10 that supports the center of the information recording surface of the optical disc, two guide shafts 11 that slidably support the optical pickup 9, and a gear 8 has an OPU rack 12 that transmits the rotational force of the gear 8 (that is, the driving force of the driving motor 7) to the optical pickup 9.

  The traverse chassis 4 has an elevating boss 41 that engages with a cam groove 53 of the cam slider 5 described later.

  A plurality of gears 8 are attached to the drive motor 7, and the driving force of the drive motor 7 is decelerated and transmitted to the tray rack 32, slider rack 52, and OPU rack 12. For convenience of explanation, among the plurality of gears 8, the gears that mesh with the tray rack 32, the slider rack 52, and the OPU rack 12 are also referred to as a first gear 81, a second gear 82, and a third gear 83, respectively. is there. Both the drive motor 7 and the gear 8 are provided on the right side of the traverse chassis 4.

  In this embodiment, the first gear 81, the second gear 82, and the third gear 83 are provided as the gears 8 that mesh with each rack, but a single gear meshes with a plurality of racks. It is good as well. That is, as will be described later, in the disk loader 1 of the present embodiment, a plurality of racks do not mesh with the gears at the same time, so the driving force of the drive motor 7 is transmitted to the plurality of racks with a single gear. Thus, the number of parts can be reduced. In the present embodiment, the first gear 81 and the second gear 82 may be a single gear.

  The optical pickup 9 includes various optical components. The optical pickup 9 receives the rotational force of the third gear 83 (the driving force of the driving motor 7) through the OPU rack 12. Then, the optical pickup 9 slides on the guide shaft 11 and moves in the radial direction of the optical disc, thereby approaching the turntable 10 or moving away from the turntable 10.

  The OPU rack 12 has an engaging portion 121. The engaging portion 121 engages with the engaging portion 22 of the main chassis 2 described above except when the tray 3 is in the storage position (that is, when the tray 3 is in the insertion / removal position or during conveyance). When the engaging portion 22 and the engaging portion 121 are engaged, the OPU rack 12 and the third gear 83 are not meshed, and the driving force of the driving motor 7 is not transmitted to the optical pickup 9.

  On the other hand, when the engagement portion 22 and the engagement portion 121 are disengaged (in other words, the tray 3 reaches the storage position), the OPU rack 12 and the third gear 83 are engaged with each other, and the drive force of the drive motor 7 is increased. Is transmitted to the optical pickup 9.

  The cam slider 5 has a slider boss 51, a slider rack 52, and a cam groove 53. The slider boss 51 engages with the guide groove 33 of the tray 3 as described above. The slider rack 52 is a rack that meshes with the second gear 82.

  The raising / lowering boss 41 of the traverse chassis 4 is engaged with the cam groove 53. The elevating boss 41 is formed to engage with different portions of the cam groove 53 as the cam slider 5 slides.

  More specifically, the cam groove 53 is an upper groove portion 531 formed along a direction perpendicular to the transport direction of the tray 3 at a position closest to the tray 3, and perpendicular to the transport direction of the tray 3 at a position farthest from the tray 3. A lower groove portion 533 formed along the vertical direction, and an oblique groove portion 532 that is formed obliquely with respect to a direction perpendicular to the conveyance direction of the tray 3 and connects the upper groove portion 531 and the lower groove portion 533.

  As the cam slider 5 slides, the elevating boss 41 is engaged with the lower groove portion 533, the oblique groove portion 532, and the upper groove portion 531 in this order. That is, the elevating boss 41 rises as the cam slider 5 slides, and the traverse chassis 4 rises accordingly.

  Next, in the optical disk apparatus of this embodiment, a series of operations from when the optical disk is placed on the tray 3 to when the optical pickup 9 irradiates the information recording surface of the optical disk with laser light will be described.

  When the tray 3 is in the insertion / removal position, only the tray rack 32 and the first gear 81 are engaged, and the slider rack 52 and the second gear 82, and the OPU rack 12 and the third gear 83 are engaged. Not done. The lifting boss 41 is engaged with the lower groove portion 533 of the cam groove 53 (see FIG. 3). Further, the engaging portion 22 is engaged with the engaging portion 121. The slider boss 51 is engaged with the linear groove portion 331 of the guide groove 33.

  When a user places an optical disc on the placement unit 31 and presses a tray opening / closing button (tray opening / closing means shown in FIG. 6), the drive motor 7 is driven. As described above, when the tray 3 is in the insertion / removal position, the driving force of the driving motor 7 is transmitted only to the tray 3 via the first gear 81 and the tray rack 32. As a result, the tray 3 starts to slide toward the storage position.

  When the tray 3 slides toward the storage position, the slider boss 51 sequentially engages with the oblique groove portion 332 and the orthogonal groove portion 333 of the guide groove 33. When the slider boss 51 is engaged with the orthogonal groove portion 33, the cam slider 5 slides toward the second gear 82. When the tray 3 reaches the storage position, the slider rack 52 and the second gear 82 mesh with each other. Note that when the tray 3 reaches the storage position, the tray rack 32 and the first gear 81 are disengaged.

  When the tray 3 reaches the storage position, the driving force of the driving motor 7 is transmitted to the cam slider 5 via the second gear 82 and the slider rack 52. As a result, the cam slider 5 slides toward the right side wall 2 a of the main chassis 2. Along with the sliding operation, the elevating boss 41 is sequentially engaged with the oblique groove portion 532 and the upper groove portion 531 of the cam groove 53, and the traverse chassis 4 rises (approaches the tray 3).

  When the elevating boss 41 engages with the upper groove portion 531 and the cam slider 5 slides, the slider rack 52 and the second gear 82 are disengaged, and the sliding operation of the cam slider 5 ends. When the sliding operation of the cam slider 5 is completed, the engagement portion 22 and the engagement portion 121 are disengaged, and the OPU rack 12 is engaged with the third gear 83 (see FIG. 5; FIG. It is an expansion schematic diagram which shows the meshing state of the OPU rack 12 and the 3rd gear 83 when it sees from the side.

  As a result, the driving force of the driving motor 7 is transmitted to the optical pickup 9 via the third gear 83 and the OPU rack 12. The optical pickup 9 slides on the guide shaft 11 in the radial direction of the optical disk by the driving force of the driving motor 7. When the optical pickup 9 reaches the reference position, the drive motor 7 stops, and laser light is emitted from the optical pickup 9 toward the information recording surface of the optical disk.

  In the present embodiment, the reference position of the optical pickup 9 is a reference position for controlling the position of the optical pickup 9, and the optical pickup 9 is when the optical disk is inserted (the tray 3 has reached the storage position). At a time) is moved to the reference position by the driving force of the drive motor 7.

  In the present embodiment, the reference position is described as a position farthest from the turntable 10 (stroke end far from the turntable 10), but is not limited thereto. It may be a position closest to the turntable 10 (stroke end close to the turntable 10), or an arbitrary position between both stroke ends.

  As described above, in the present embodiment, the driving force of the single driving motor 7 is transmitted to the tray 3, the cam slider 5, and the optical pickup 9 through the gears and the rack, and the timing at which the driving force is transmitted to each other overlaps. do not do. Therefore, when the tray opening / closing means 14 is pressed by the user, it is accurately detected whether the position of the tray 3 is the storage position or the insertion / removal position. When the tray 3 is in the storage position, the tray 3 is inserted / removed. The drive motor 7 is driven so as to move to the position, and when the tray 3 is in the insertion / removal position, the drive motor 7 needs to be driven so as to move the tray 3 to the storage position.

  However, it is assumed that the engagement portion 12 and the engagement portion 122 are disengaged when the tray 3 is not in the storage position (when the tray 3 is in the insertion / removal position or during conveyance) due to an external force such as impact or vibration. . In that case, since the third gear 83 and the OPU rack 12 are engaged at the same time as the first gear 81 and the tray rack 32 are engaged, the driving force of the drive motor 7 is transmitted to the tray 3 and the optical pickup 9. Become.

  When the tray 3 is slid toward the storage position in this state, the optical pickup 9 also moves in the radial direction. When the optical pickup 9 reaches the reference position, the drive motor 7 stops driving, and the tray 3 interferes with the optical pickup 9 and cannot slide to the storage position.

  Therefore, in the present embodiment, even when the driving force of the driving motor 7 is transmitted to the tray 3 and the optical pickup 9 at the same time, an abnormality is detected and the position of the tray 3 and the engagement portion 12 and the engagement portion 122 are detected. Return the engaged state to the normal state. In other words, the tray 3 is transported to a position where the tray 3 should be (that is, the storage position) when the engaging portion 12 and the engaging portion 122 are disengaged during normal operation. FIG. 6 is a block diagram showing the configuration of the optical disc apparatus of this embodiment.

  As shown in FIG. 6, the optical disc apparatus of this embodiment includes a control unit 13, a drive motor 7, a tray opening / closing means 14, and a switch 15. The drive motor 7 is the same as the drive motor 7 shown in FIGS.

  The control unit 13 is a control unit that comprehensively controls the entire optical disc apparatus including driving of the drive motor 7. The control unit 13 includes a CPU, a ROM, and a RAM (all not shown). The ROM stores a program executed by the control unit 13 and parameters and data necessary for executing the program. The CPU executes various programs stored in the ROM. The RAM temporarily stores data obtained during various processes and data obtained as a result of various processes. These CPU, RAM, ROM and the like are connected via a bus. Note that the CPU, ROM, and RAM may be partially or fully integrated on one chip.

  The tray opening / closing means 14 is an operation means for inputting an instruction for conveying the tray 3 to the control unit 13. As the tray opening / closing means 14, for example, a tray opening / closing button attached to the optical disc apparatus main body, a remote operation means (remote control), or the like can be used.

  The switch 15 is detection means for detecting whether the position of the tray 3 is the storage position or not. In addition, although it is the case where it is not a storage position includes the case where it is an insertion / removal position and the case where it is conveying, switch 15 is a detection means used as the reference | standard of the opening / closing operation | movement of tray 3, and switch 15 is tray 3 in this embodiment. It is assumed that the position is a storage position or an insertion / removal position.

  The switch 15 is arranged at the foremost part of the moving path of the OPU rack 12 and is turned on by the OPU rack 12 when the engaging portion 22 and the engaging portion 121 are engaged during normal operation. That is, when the tray 3 is in the storage position, the engagement portion 22 and the engagement portion 121 are disengaged, so that the switch 15 is not turned on by the OPU rack 12. On the other hand, when the tray 3 is in the insertion / removal position, the engaging portion 22 and the engaging portion 121 are engaged, and the switch 15 is turned on by the OPU rack 12. FIG. 7 is a diagram showing the positional relationship between the switch 15 and the OPU rack 12 immediately before the switch 15 is turned on by the OPU rack 12.

  Further, the case of abnormal operation will be described. When the position of the tray 3 is the insertion / removal position, the engaging portion 22 and the engaging portion 121 are engaged. As described above, when a strong impact is applied to the optical disk apparatus due to the fall of the optical disk apparatus or the like, it is considered that the engagement portion 22 and the engagement portion 121 are disengaged even though the position of the tray 3 is the insertion / removal position. .

  As shown in FIG. 4, the engaging portion 22 includes an interference portion 23. The interference part 23 may be formed integrally with the engaging part 22 or may be attached to the engaging part 22. The interference part 23 interferes with the engagement part 121 when the position of the tray 3 is the insertion / removal position and the engagement part 22 and the engagement part 121 are disengaged, and the OPU rack 12 moves forward. Limit. As a result, the switch 15 is not turned on by the OPU rack 12.

  When a conveyance operation instruction is input during normal operation, the control unit 13 controls the drive motor 7 to convey the tray 3 from the storage position to the insertion / removal position or to convey the tray 3 from the insertion / removal position to the conveyance position. Hereinafter, a process performed by the control unit 13 when it is determined whether the operation state is the normal operation state or the abnormal operation state will be described with reference to a flowchart.

  FIG. 8 is a flowchart showing an example of processing performed by the control unit of the optical disc apparatus of the present embodiment. More specifically, it is a flowchart showing processing performed by the control unit 13 when the position of the tray 3 is the insertion / removal position and the engagement portion 22 and the engagement portion 121 are disengaged.

  When the tray 3 is in the insertion / removal position, the control unit 13 determines whether or not an instruction to close the tray 3 is given via the tray opening / closing means 14 (step S01). When the tray close instruction is issued (Y in step S01), the process proceeds to step S02, and when the tray 3 close instruction is not issued (N in step S01), the process returns to step S01.

  In step S02, the control unit 13 determines whether the switch 15 is on or off. If the switch 15 is on, the process proceeds to step S03, and the drive motor 7 is driven to perform the closing operation of the tray 3 assuming that the tray 3 is in the insertion / removal position, and the process is terminated. On the other hand, if the switch 15 is off, the process proceeds to step S04, and the drive motor 7 is driven to open the tray 3 assuming that the tray 3 is in the storage position, and the process proceeds to step S05.

  In step S05, the control unit 13 determines whether or not the switch 15 is turned on within a predetermined time from the start of the tray 3 opening operation. If the switch 15 is turned on within a predetermined time, the process is terminated because it is a normal operation state. On the other hand, if the switch 15 is not turned on within the predetermined time, it is determined that the operation is abnormal, and the process proceeds to step S06.

  In the present embodiment, the predetermined time is not particularly limited. For example, the predetermined time is determined on the basis of the time from when the opening operation of the tray 3 is started until the switch 15 is turned on in the normal operation state.

  In step S06, the control unit 13 drives the drive motor 7 in the forced return mode. The forced return mode is a mode in which the closing operation is performed by applying a driving voltage higher than the driving voltage applied to the driving motor 7 in the closing operation in the normal operation state to the driving motor 7.

  As described above, when the closing operation of the tray 3 and the moving operation of the optical pickup 9 are started substantially simultaneously, the optical pickup 9 reaches the reference position first, and the driving of the drive motor 7 is stopped. Cannot be transported to the storage position.

  In this state, since the driving force of the drive motor 7 is transmitted to both the tray 3 and the optical pickup 9, the position of the tray 3 is a normal position (storage position) with respect to the position (reference position) of the optical pickup 9. In order to convey (return) to the tray 3, it is necessary to transmit the driving force of the driving motor 7 to the tray 3 while skipping the OPU rack 12 and the third gear 83.

  In order to skip the OPU rack 12 and the third gear 83, the driving motor 7 is applied with a higher driving voltage (for example, 3.5V to 5V) than the normal mode (for example, the mode for applying the driving voltage of 2V). It is necessary to drive in a mode in which a driving voltage is applied. Therefore, in the present embodiment, the drive motor 7 is driven in the forced return mode in order to skip the OPU rack 12 and the third gear 83, so that the position of the tray 3 is a normal position (with respect to the position of the optical pickup 9 ( (Contained position).

  When the reference position of the optical pickup 9 is not the stroke end far from the turntable 10, the OPU rack 12 and the third gear 83 cannot be skipped (that is, the optical pickup 9 moves from the reference position). In this case, the optical pickup 9 may be returned to the reference position after the tray 3 is transported to the storage position.

  According to the present embodiment, even if the engagement between the engagement portion 22 and the engagement portion 121 is released due to an external force such as impact or vibration, even though the tray 3 has not reached the storage position, an abnormality is caused. The tray 3 is detected and conveyed to the storage position. Therefore, even if the optical pickup 9 is unlocked in a state where the chucking of the optical disk is released (the engagement between the engagement portion 22 and the engagement portion 121 is not reached even though the tray 3 has not reached the storage position). The optical disk device can be used continuously without requiring repair or the like.

  Further, the OPU rack 12 interferes with the interference portion 23 when the engagement portion 22 and the engagement portion 121 are disengaged before the tray 3 reaches the storage position. Therefore, it can be easily detected that an abnormality has occurred (that is, the engagement of both engaging portions is disengaged even though the tray 3 is not in the storage position).

  Further, the interference part 23 is formed in the engagement part 22 of the main chassis 2. By forming the interference portion 23 on the main chassis 2 which is a fixed component and has high rigidity, the interference portion 23 can be reliably caused to interfere with the OPU rack 12 at the time of abnormality.

  Further, since the tray can be transported to the storage position by the drive motor without requiring additional parts, the cost does not increase.

  In addition, a drive applied to the drive motor 7 to transport the tray 3 to the storage position when an abnormality occurs (the engagement between the engaging portions is disengaged even though the tray 3 has not reached the storage position). The voltage is higher than the drive voltage applied to the drive motor 7 in order to transport the tray 3 to the storage position when the tray 3 is normal (when the tray 3 is in the storage position and disengaged from both engaging portions). . That is, the driving force of the drive motor 7 is stronger in the abnormal state than in the normal state. Therefore, it becomes easy to move the tray 3 to the storage position.

  Even when the optical pickup 9 reaches the reference position (particularly, when the reference position is a stroke end far from the turntable 10), the OPU rack 12 does not reach the storage position. As a result of the gear 8 being skipped, the tray 3 is conveyed to a normal position (that is, the storage position) without changing the position of the optical pickup 9. Thereby, the tray 3 can be transported to the storage position.

  Further, even when the optical pickup 9 reaches the reference position (particularly when the reference position is an arbitrary position between both stroke ends), the tray 3 does not reach the storage position. While the rack 12 and the gear 8 are engaged with each other, the position of the optical pickup 9 is changed, and the tray 3 is conveyed to a normal position (that is, the storage position). Thereafter, the optical pickup 9 returns to the reference position. Thereby, the tray 3 can be transported to the storage position.

  The present invention can be used in an optical disc apparatus.

DESCRIPTION OF SYMBOLS 1 Disc loader 2 Main chassis 3 Tray 4 Traverse chassis 5 Cam slider 6 Clamper 7 Drive motor 8 Gear 9 Optical pickup 10 Turntable 11 Guide shaft 12 Optical pickup rack (OPU rack)
14 tray opening / closing means 15 switch 22 engaging portion 23 interference portion 32 tray rack 33 guide groove 41 lift boss 51 slider boss 52 slider rack 53 cam groove 121 engaging portion

Claims (8)

A drive motor;
An optical pickup for irradiating the optical disc with light;
A power transmission unit that moves the optical disc and the optical pickup by the power of the drive motor;
A switch that changes a signal state when the optical disc is in a first position and a second position;
A control unit for returning the optical disk to the first position based on a timing of moving the optical disk from the first position and a state of the signal within a predetermined time from the timing;
A main chassis having a first engagement portion;
Equipped with a,
The power transmission unit includes a rack of the optical pickup,
The rack has a second engaging portion;
The switch is turned on by the rack when the first engagement portion and the second engagement portion engage with each other, and the engagement between the first engagement portion and the second engagement portion is established. An optical disc apparatus, which is turned off when a match is lost . The first position is a position where the optical disc is stored,
The second position is a position from which the optical disc is removed;
Wherein the control unit, the switch is off, said switch from said Taimigu within a predetermined time period when not turned ON, according to claim 1, wherein the returning the optical disc in the first position Optical disk device. An interference unit,
When the engagement between the first engagement portion and the second engagement portion is released before the optical disc reaches the first position, the rack interferes with the interference portion, whereby the switch There optical disk apparatus according to claim 1 or 2, wherein the being turned off. The optical disk apparatus according to claim 3 , wherein the interference unit is formed in the first engagement unit. The optical disk apparatus according to any one of claims 1 to 4, characterized in that returning the optical disc in the first position by the power of the drive motor. The drive voltage applied to the drive motor to return the optical disk to the first position is greater than the drive voltage applied to the drive motor to transport the optical disk to the first position in the normal mode. 6. The optical disk apparatus according to claim 5 , wherein the optical disk apparatus has a high voltage. The power transmission unit includes a rack of the optical pickup and a gear mechanism that transmits power of the drive motor,
7. The optical disc apparatus according to claim 6 , wherein when the optical pickup reaches a reference position, the optical disc is returned to the first position in a state where the rack and the gear mechanism are skipped. The power transmission unit includes a rack of the optical pickup and a gear mechanism that transmits power of the drive motor,
When the optical pickup reaches a reference position, the optical disk is returned to the first position in a state where the rack and the gear mechanism are engaged, and then the optical pickup is returned to the reference position. The optical disc apparatus according to claim 5 .

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