JP2007149199A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk drive in which the height accuracy at the elevating/lowering end of a traverse unit with respect to a mechanical chassis by reducing the number of times of changing driving forces is increased and movable components can be reduced. <P>SOLUTION: When a tray 260 is discharged, a drive motor 110 moves the traverse unit 200 in the direction of discharging a tray, the traverse unit 200 presses the tray 260 and the tray 260 subsequently is moved by driving force transferred from the drive motor 110. When the tray 260 is inserted, the tray 260 presses the traverse unit 200, and the drive motor 110 subsequently moves the tray 260 and the traverse unit 200 to a recording/reproduction position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disc apparatus capable of recording / reproducing various information signals such as video / audio signals on / from an optical disc such as a compact disc (CD) or DVD.

  The disk device is equipped with a loading mechanism for loading the optical disk into the device. The loading mechanism includes a tray loading method and a slot-in method. In the tray loading method, a tray on which an optical disk can be placed is placed between a second position where a user can place the optical disk on the tray and a first position where an information signal can be recorded and reproduced on the optical disk in the apparatus. It is arranged so that it can slide.

  In the tray loading method, after the tray on which the optical disk is placed is pulled into the apparatus, the traverse unit in the apparatus moves in a predetermined manner to place the optical disk on the turntable. The optical disk placed on the turntable is clamped by the clamper and the turntable. Next, the optical disk can be rotated by rotating the turntable with a motor or the like. Next, the optical pickup is moved in the radial direction of the optical disc at a position facing the recording surface of the optical disc, and the information signal is recorded or reproduced on the optical disc by irradiating the recording surface of the optical disc with a laser at a predetermined position. Can do.

  The traverse unit is a turntable that is fitted in the center hole of the optical disc and on which the optical disc is mounted, a drive mechanism including a motor that rotates the turntable, and an optical pickup that can record and reproduce information signals on the optical disc. And a moving mechanism for guiding and moving the optical pickup in the radial direction of the optical disk.

  In a conventional tray loading type disk device, the traverse unit is moved up and down in the direction of the rotation axis of the optical disk or rotated in the direction of the rotation axis in order to attach and detach the optical disk to and from the turntable. In order to perform such up-and-down operation or rotation operation, the traverse unit is provided with a pin, a movable part having a cam groove is provided in the mechanical chassis, and the pin is fitted into the cam groove to drive the movable part. It has a configuration to do.

  Furthermore, in a tray loading type disk device that drives the optical pickup, and raises / lowers and rotates the traverse and drives the tray with a single driving source, the driving force from the single driving source is used to move the optical pickup. The traverse is moved up and down and rotated and the tray is moved (see, for example, Patent Documents 1 and 2).

  14A is a plan view showing an outline of a tray loading type disk device also serving as a drive source described in Patent Document 1, and FIG. 14B is a side view when viewed from the right in FIG. 14A. FIG. 14B is a plan view when viewed from below in FIG. 14A. In the following description, FIGS. 14A to 14C may be collectively referred to as “FIG. 14”. In addition, FIG. For convenience of explanation, the detailed shape of each component is simply described.

  In FIG. 14A, the operation of ejecting the optical disk will be described as an example.

  As shown in FIG. 14A, the traverse unit 620 is provided with a drive motor 630 that drives the optical pickup 690, moves the traverse unit 620 up and down (rotates in this example), and opens and closes the tray 700. The driving force of the driving motor 630 is transmitted to the pickup pinion 650 by the gear train 640. The pickup pinion 650 meshes with a rack provided in the optical pickup 690 and a slide rack 691 provided in a backlash-less relationship with the rack by a rack spring 692, and drives and positions the optical pickup 690. Can do. Further, the driving force transmitted to the pickup pinion 650 is transmitted to the tray pinion 670 via the gear train L660.

  When the pickup pinion 650 rotates and the optical pickup 690 reaches the inner peripheral edge of the optical disk, the rack provided on the optical pickup 690 and the pickup pinion 650 are disengaged, and the pickup pinion 650 is engaged with only the slide rack 691. Become. When the pickup pinion 650 further rotates, the optical pickup 690 is urged toward the inner peripheral end of the optical disk by the rack spring 692, and only the slide rack 691 continues to move downward in the drawing. When the slide rack 691 continues to move, the follower pin portion 691a of the slide rack 691 and the cam groove 621a of the trigger plate 621 are movably engaged, whereby the trigger plate 621 is moved leftward in the figure. . When the trigger plate 621 shown in FIG. 14C is moved, the boss 621b planted on the trigger plate 621 is engaged with the groove 611a of the cam slider 611, so that it is urged rightward in the figure by the toggle spring 612. The cam slider 611 moves in the left direction in the figure together with the trigger plate 621 to reach the state shown in FIG.

  Next, when the cam slider 611 is moved to the position shown in FIG. 15, the rack portion 611b formed on the cam slider 611 and the small-diameter pinion 670a integrally formed on the back surface of the tray pinion 670 start. Then, the engagement between the pickup pinion 650 and the slide rack 691 is released. As a result, the cam slider 611 continues to be driven in the left direction in the figure.

  Further, the traverse unit 620 is provided with a follower portion 620a that is movably engaged with a cam groove 611c formed in the cam slider 611. Accordingly, the traverse unit 620 rotates as the cam slider 611 is moved as shown in FIG. 16, and the optical disk 400 placed on the turntable 680 is transferred to the tray 700.

  Next, as shown in FIG. 16, a groove 700 b formed on the back surface of the tray and a boss 611 d provided by being planted on the upper surface of the cam slider 611 are movably engaged. Therefore, as shown in FIG. 16B, when the cam slider 611 is further moved from the position shown in FIG. 16 to the left in the drawing after the turntable 680 has moved to the outside of the tray surface, the tray 700 is shown in FIG. It is driven in the opening direction (downward in the figure).

  In FIG. 17, when the cam slider 611 is moved, the trigger plate 621 is driven in the left direction in the drawing together with the cam slider 611 by the boss 621b engaged with the groove 611a. Further, the slide rack 691 is held in the movable direction (vertical direction in the figure) by the follower pin portion 691a being engaged with the cam groove 621a formed in the trigger plate 621, and the optical pickup 690 is It is urged toward the inner peripheral end of the optical disk via a slide rack 691 and a rack spring 692.

  Also, as shown in FIG. 17, the tray 700 is driven in the opening direction by the groove 700b and the boss 611d, whereby the engagement between the rack 700a formed on the back surface of the tray 700 and the tray pinion 670 is started, and the cam slider 611 and the small diameter pinion 670a are disengaged.

  As the tray pinion 670 continues to rotate from the state shown in FIG. 17, the tray 700 is moved in the opening direction. Since the boss 611d and the groove 700b are engaged during the movement of the tray 700, the position of the cam slider 611 in the left-right direction in the figure is restricted.

Note that the operation of moving the tray 700 from the drawer position into the apparatus is performed in the reverse procedure of the above-described drawer operation, and thus detailed description thereof is omitted.
JP 2004-187571 A JP 2000-222803 A

  However, in the above conventional configuration, the driving force from the driving motor 630 is switched in the order of the movement of the optical pickup 690, the movement of the trigger plate 621, the movement of the cam slider 611, and the pulling-out operation of the tray 700. Is required 3 times. In such a configuration, the backlash between the components accumulates, and there is a problem that the height position accuracy of the lifting end of the traverse unit 620 with respect to the mechanical chassis 610 cannot be improved.

  Further, since the traverse unit 620 is moved up and down by sliding the cam slider 611 and moving the boss 621b in the cam groove 611a, the height position of the lift end of the traverse unit 620 with respect to the mechanical chassis 610 is determined by the cam slider. Therefore, there is a problem that the positional accuracy is lowered when the backlash between the components is taken into consideration.

  Moreover, since the cam slider 611 which is a movable part is required, the number of parts cannot be reduced.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a disk device that can reduce the number of times of switching of the driving force, improve the height accuracy of the traverse unit with respect to the mechanical chassis at the elevation end, and further reduce the number of movable parts. To do.

  In order to solve the above-described problems, a disk device according to the present invention includes a tray on which an optical disk can be placed, a turntable that rotatably supports the optical disk, an information signal written to the disk that is rotated by the turntable, and / Or an optical pickup for reading out an information signal recorded on the optical disc, a pickup drive mechanism for moving the optical pickup between the inner peripheral side and the outer peripheral side of the optical disc, the tray, and the optical disc on the turntable A disk loading mechanism for reciprocally transferring between a first upper position and a second position outside the apparatus, a mechanical chassis constituting a base of the apparatus main body, a drive motor, and drive from the drive motor A transmission mechanism for transmitting force to the pickup drive mechanism and the disk loading mechanism; In the mechanical chassis, the traverse unit is supported so as to be movable in the direction of the rotation axis of the turntable and movable in the transfer direction of the tray, and comprising the optical pickup, the pickup moving mechanism, and the turntable. The optical pickup is moved in the inner circumferential direction of the optical disc by continuously rotating the drive motor in the first rotation direction when the tray is at the first position, and the traverse unit is ejected from the tray. The traverse unit presses and moves the tray in the discharge direction, and the tray and the loading mechanism are engaged with each other, whereby the driving force from the transmission mechanism is transmitted to the loading mechanism. , The tray is transferred to a second position, and the tray is The tray is moved in the insertion direction by continuously rotating the drive motor in the direction opposite to the first rotation direction when the drive motor is in the position, and the tray presses and moves the traverse unit to transmit the transmission. When the mechanism and the pickup driving mechanism are engaged, the traverse unit is moved in the insertion direction, and the tray is moved to the first position.

  According to the disk device of the present invention, the number of switching of the driving force is small, the number of moving parts is small, the positional accuracy at the elevating end of the traverse unit can be improved, and the load on the driving source can be reduced.

  Further, since the number of parts can be reduced, the cost can be reduced and the apparatus can be reduced in size and weight.

  In the disk device of the present invention, the traverse unit may be provided with a contact portion that contacts a part of the tray, and the contact portion is provided in the vicinity of the rear end in the discharge direction of the tray.

  In addition, the relative height of the contact portion between the contact portion and the tray can be changed during the movement of the traverse unit, and the drive section for synchronizing the traverse unit with the transfer operation of the tray can be adjusted. It is good also as a structure.

  The drive motor is preferably arranged in the chassis. Thereby, since the number of parts in a mechanism with a moving operation such as a traverse unit or a tray can be reduced, a moving load of the traverse unit or the like can be reduced.

  The transmission mechanism is preferably arranged in the chassis. Thereby, since the number of parts in a mechanism with a moving operation such as a traverse unit or a tray can be reduced, a moving load of the traverse unit or the like can be reduced.

  The traverse unit may be supported in the chassis so as to be rotatable in the direction of the rotation axis of the turntable.

  And a restricting member capable of restricting movement of the traverse unit in the direction of the rotation axis when the tray is in the first position, and the restricting member is in a restricted state or released as the pickup drive mechanism moves. A configuration that can be switched to a state is preferable. Thereby, it is not necessary to provide a separate mechanism for driving the regulating member, and the number of parts can be reduced, the cost can be reduced, and the apparatus can be reduced in size and weight.

  The transmission mechanism or the disk loading mechanism may include a drive mechanism including a belt and a pulley. Thereby, the number of parts in the transmission mechanism or the disk loading mechanism can be reduced, and the cost can be reduced and the apparatus can be reduced in size and weight.

  The mechanical chassis is provided with a cam groove on a side surface along the tray transfer direction, and the traverse unit is provided with a follower boss that is movably engaged with the cam groove. It is preferable that the groove is formed so that the traverse unit can be guided in the rotation axis direction and the tray transfer direction. This eliminates the need for moving parts with cams that raise and lower the traverse unit, reduces the number of drive force changes, determines the height at the elevating end of the traverse unit by the cam groove of the mechanical chassis, and higher positions. Accuracy is obtained.

(Embodiment 1)
FIG. 1A is a plan view showing the configuration of the disk device according to Embodiment 1. FIG. 1B is a cross-sectional view of the ZZ portion in FIG. 1A. In the following description, FIGS. 1A and 1B may be collectively referred to as “FIG. 1”. In addition, FIG. Moreover, in FIG. 1A and FIG. 1B, although the dimension of the same member described in both figures may differ in each figure, it is the same dimension in fact. FIG. 1C is a partial cross-sectional view of the vicinity of a boss provided on the lock rod.

  In FIG. 1, a disk device 1 is arranged on a mechanical chassis 100, a traverse unit 200 that is rotatably disposed in an opening formed in the main surface of the mechanical chassis 100, and a slide on the mechanical chassis 100. And a tray 260 on which the optical disk 400 can be placed. The disk device 1 is built in a device such as a stationary DVD player, for example, and the tray 260 is configured to be movable between a pulling position (second position) and a recording / reproducing position (first position).

  The “drawing position” is a position where the tray 260 is located outside the apparatus and a user can place the optical disk 400. At least the disk placement surface 266 of the tray 260 (see FIGS. 3A and 3B). ) Is the position exposed outside the device. The “recording / reproducing position” is a position where the tray 260 is located inside the apparatus and the information reproducing mechanism can read the information signal recorded on the optical disc 400. In this configuration, the tray 260 is turned. This corresponds to the state of being positioned on the table 210. If the optical disc 400 is an optical disc capable of recording information signals, the information signals can be recorded on the optical disc 400 at the recording / reproducing position.

  As shown in FIG. 1, the mechanical chassis 100 includes a drive motor 110, a motor gear 111 press-fitted into the drive motor 110, a small-diameter gear and a large-diameter gear that are coaxially integrated, and the large-diameter gear is a motor gear 111. The reduction gear 120 that meshes with the gear, the small-diameter gear and the large-diameter gear are integrally configured coaxially, the reduction gear 130 that meshes with the small-diameter gear of the reduction gear 120, and the small-diameter gear and large-diameter gear that are coaxially integrated. And a speed adjusting gear 150 in which the small diameter gear and the large diameter gear are integrally formed coaxially and the large diameter gear meshes with the large diameter gear of the pick pinion 140. A steering gear 160 that meshes with the small-diameter gear of the speed adjusting gear 150, and a tray pinion 170 that meshes with the steering gear 160. The small-diameter gear of the pick pinion 140 meshes with the rack portion 241c (see FIG. 2) of the rack portion 241. The tray pinion 170 meshes with a rack portion 261 formed on the tray 260.

  As shown in FIG. 1B, a cam groove 101 and a cam groove 102 are formed on the vertical wall 100c of the mechanical chassis 100 (the inner surface of the opening where the traverse unit 200 is disposed). The cam groove 101 movably supports the follower boss 202 of the traverse unit 200 and serves as a rotation shaft of the traverse unit 200. Further, the cam groove 102 movably supports the follower boss 203 of the traverse unit 200, and the traverse unit 200 can be rotated as the follower boss 203 moves in the cam groove 102. In the present embodiment, since the traverse unit 200 is configured to rotate about the follower boss 202, the cam groove 101 is formed in a substantially square shape and the cam groove 102 is formed in a substantially Z shape. As long as the turntable 210 mounted on the unit 200 can be raised and lowered, each cam groove may have another shape.

  As shown in FIG. 1, a clamp plate 300 is disposed on the upper part of the turntable 210 of the mechanical chassis 100. The clamp plate 300 has a substantially rectangular Ω shape when viewed from the front side of the tray, and both ends thereof are fixed to the mechanical chassis 100 with screws. Further, an oval opening is formed in the main surface of the clamp plate 300, and the clamper 310 is held in the opening. The clamper 310 is attracted to the turntable 210 with the optical disc 400 interposed therebetween when the disc apparatus 1 records or reproduces information signals on the optical disc 400. The attracting direction includes, for example, magnetic attraction by a magnet and a metal. Thus, the optical disk 400 can be held by the clamper 310 and the turntable 210, and the optical disk 400 can be rotated by driving the turntable 210 to rotate.

  Next, the configuration of the traverse unit 200 will be described with reference to FIGS. 2A and 2B. 2A is a plan view of the traverse unit 200, and FIG. 2B is a side view of the movable rack 241 and the fixed rack 240e in FIG. 2A as viewed from the left. In FIG. 2B, for convenience of explanation, a partial cross-sectional notation is used.

  As shown in FIG. 2A, the traverse unit 200 has an optical pickup 240 and an optical disc 400 mounted thereon and driven by a motor or the like so as to be parallel to the recording surface of the optical disc 400 and movable in the radial direction (arrow A or B direction). A turntable 210 rotated by a source, a lock rod 230 movable in the direction of arrow C or D, and a traverse chassis 201 supporting each component are provided.

  The follower boss 202 is provided at a position away from the follower boss 203 on the opposite side surface of the traverse chassis 201. Further, the follower boss 202 is movably engaged with the cam groove 101 of the mechanical chassis 100 and serves as a rotation shaft when the traverse chassis 201 rotates.

  The follower boss 203 is provided in the vicinity of the end in the moving direction of the optical pickup 240 on the opposite side surface of the traverse chassis 201. Further, the follower boss 203 is movably engaged with the cam groove 102 of the mechanical chassis 100 to rotate the traverse chassis 201.

  The wall portion 204 is formed to protrude upward from the main surface of the traverse chassis 201 at the end of the traverse chassis 201 in the moving direction of the optical pickup 240. The dimension of the wall part 204 in the height direction may be set such that the contact surface 201a of the wall part 204 can contact at least the contact surface 260a of the tray 260.

  The turntable 210 has a mounting surface on which an optical disk 400 can be mounted on an upper surface, and an adsorption plate 211 (see, for example, FIG. 1B) made of metal or the like. The turntable 210 is rotationally driven by a drive source (not shown) such as a motor.

  The lock rod 230 (regulating member) is movably disposed at the end of the traverse chassis 201 in the moving direction of the optical pickup 240. The lock rod 230 is formed with a cam groove 230a, and the boss 241a of the movable rack 241 is fitted into the cam groove 230a. When the movable rack 241 moves in the direction of arrow A or B, the lock rod 230 is moved to the arrow C. Alternatively, it is configured to move in the D direction. The cam groove 230a includes a vertical portion in which a groove is formed substantially parallel to the moving direction of the movable rack 241, a horizontal portion in which a groove is formed substantially parallel to the moving direction of the lock rod 230, a vertical portion and a horizontal portion. And an inclined portion that is formed to be inclined with respect to the moving direction of the movable rack 241.

  Further, as shown in FIG. 1C, the lock rod 230 is formed with a boss 230b, and the boss 230b is fitted into a hole 100a formed in the mechanical chassis 100, thereby restricting the rotation of the traverse chassis 201. ing. Further, a pin 230 c is formed on the main surface of the lock rod 230, and the pin 230 c is fitted into a coupling portion 262 formed on the back surface of the tray 260.

  The optical pickup 240 reproduces an information signal recorded on the optical disc 400 or records an information signal on the optical disc 400. The optical pickup 240 is configured such that a support portion 240a is supported by two guide shafts 243 fixed to the traverse chassis 201, and is guided by the guide shaft 243 so as to be movable in the direction of arrow A or B. In addition, a movable rack 241 is movably disposed on the pick pinion 140 (see FIG. 1) side of the optical pickup 240.

  As shown in FIG. 2B, a fixed rack 240e is provided integrally with the optical pickup 240 below the movable rack 241. The fixed rack 240e is provided with pins 240f and 240g that are movably engaged with the cam grooves 241d and 241e of the movable rack 241. Further, a groove 240h is formed in which a pin 241b formed on the movable rack 241 is engaged so as to be movable. In the fixed rack 240e, a rack portion 240k that meshes with the pick pinion 140 is formed at a portion facing the pick pinion 140.

  The movable rack 241 is arranged at the end of the optical pickup 240 so as to be slidable in the arrow A or B direction. The movable rack 241 and the fixed rack 240e are movably engaged with pins 240f and 240g and cam grooves 241d and 241e, and can be displaced from each other by a rack spring 242 suspended from the pins 241b and 240b. It is connected. A pin 241b formed on the movable rack 241 is movably engaged with a cam groove 240h formed on the fixed rack 240e. The rack spring 242 has one end fixed to a pin 241b formed on the movable rack 241 and the other end fixed to a pin 240b formed on the fixed rack 240e. In addition, a rack portion 241c is formed at a portion of the movable rack 241 that meshes with the pick pinion 140 (see FIG. 1), and the driving force transmitted from the drive motor 110 is transmitted to the movable rack 241. Further, the movable rack 241 has a boss 241a. When the movable rack 241 slides in the pitch line direction, the boss 241a is fitted into the cam groove 230a of the lock rod 230 so that the lock rod 230 is moved. It can be moved in the direction of arrow C or D.

  Next, the configuration of the tray 260 will be described with reference to FIGS. 3A and 3B.

  FIG. 3A is a plan view of the tray 260, but is illustrated from the back side for convenience of explanation. FIG. 3B shows a cross section of the YY portion in FIG. 3A.

  As shown in FIGS. 3A and 3B, the tray 260 is provided with a disk mounting surface 266 on the main surface on which an optical disk 400 (see, for example, FIG. 1A) can be mounted, so that the optical disk 400 can be positioned. On the other hand, it is comprised from the recessed part of a similar shape. In the present embodiment, the diameter of the disk mounting surface 260 is set to a size and shape capable of mounting a large-diameter disk having a diameter of 12 cm, but is not limited to this size and shape. In addition, a concave portion on which a large-diameter disk can be placed and a small-diameter disk having a diameter of 8 cm can be selectively placed may be formed on the inner circumference side of the disk placement surface 266.

  Further, the end of the tray 260 in the moving direction is provided with a contact surface 260a that can contact the contact surface 201a of the traverse chassis 201 (see FIG. 2A). In the present embodiment, the width direction dimension of the contact surface 260a is slightly larger than the width direction dimension of the wall part 204 (see FIG. 2A) of the traverse chassis 201. What is necessary is just the shape and magnitude | size which can contact.

  A rack portion 261 that meshes with the tray pinion 170 (see FIG. 1A) is formed on the back surface of the tray 260 along the moving direction of the tray 260. In addition, a guide groove 263 is formed on the back surface of the tray 260 so that a protrusion formed on the mechanical chassis 100 is movably engaged with the rack portion 261 in a substantially parallel manner. Further, a guide portion 264 on which a protrusion formed on the mechanical chassis 100 is slid is formed on the back surface of the tray 260. The guide groove 263 and the guide portion 264 restrict the tray 260 from being detached from the apparatus when the tray 260 reaches the pull-out position, or the tray 260 moves into the apparatus more than necessary when the tray 260 reaches the recording / reproducing position. It is prevented from being inserted. With the above configuration, the tray 260 is guided to move between the drawer position and the recording / reproducing position.

  Further, on the back surface of the tray 260, a coupling portion 262 is formed in which a pin 230c of the lock rod 230 (see FIG. 1A) is movably fitted. The coupling portion 262 is formed in a concave shape on the back surface of the tray 260.

  Further, guide ribs 267 for positioning the tray 260 in the vertical direction (the central axis direction of the optical disk) are formed on both side surfaces parallel to the moving direction of the tray 260. The guide rib 267 is movably engaged with a guide groove (not shown) formed on the apparatus side, so that rattling of the tray 260 is reduced.

  An opening 265 is formed in the approximate center of the main plane of the tray 260. The opening 265 allows the turntable 210 to be inserted and the optical pickup 240 to access the optical disc 400 when the traverse unit 200 (see FIGS. 1A and 1B) is raised when the tray 260 is at the recording / reproducing position. It is formed as possible.

  1 to 3, the motor gear 110, the reduction gears 120 and 130, and the pick and pinion 140 constitute a transmission mechanism. The speed control gear 150, the direction gear 160, and the tray pinion 170 constitute a disk loading mechanism. The movable rack 241 constitutes a pickup drive mechanism.

  The operation of the disk device will be described below.

  4 to 11 are a plan view and a cross-sectional view for explaining the operation from the recording / reproducing state (clamped state) of the optical disc to the ejected state of the disc (the state where the tray 260 is in the pulled-out position) in the disc device. is there. Each cross-sectional view is a cross section of a ZZ portion in each plan view.

  First, FIG. 4 shows a state in which the disk device 1 is recording / reproducing with respect to the optical disk 400. 4A, the optical pickup 240 transmits from the drive motor 110 in order of the motor gear 111, the reduction gear 120, the reduction gear 130, the pick pinion 140, the non-backlash movable rack 241 and the fixed rack 240e (see FIG. 2B). Due to the driving force applied, the recording medium is moved in the vertical direction (inner and outer peripheral directions of the optical disk) in the figure to access the recording surface of the optical disk 400. At this time, the movable rack 241 and the fixed rack 240e are pulled by the rack spring 242.

  Further, the position of the traverse unit 200 is fixed with respect to the mechanical chassis 100 by engaging a boss 230 b provided in the lock rod 230 and a hole 100 a provided in the mechanical chassis 100. Further, the position of the tray 260 is fixed by the engagement between the pin 230 c provided on the lock rod 230 and the coupling portion 262 provided on the tray 260. 4A and 4B, the positions of the traverse unit 200 and the tray 260 are fixed, and only the optical pickup 240 is movable in the radial direction of the optical disc 400.

  Next, the disc ejection operation will be described.

  When the disc apparatus 1 finishes recording or reproducing the information signal with respect to the optical disc 400 and the user performs an eject operation or the like, the ejection operation of the optical disc 400 is started. In the discharging operation, first, the driving force of the driving motor 110 is transmitted to the movable rack 241 and the fixed rack 240e, and the optical pickup 240 starts moving toward the inner periphery (downward in the figure) of the optical disc 400. Note that the drive motor 110 continuously operates after the discharge operation is started until the tray 260 reaches the pull-out position.

  FIG. 5 shows a state where the optical pickup 240 has reached the innermost periphery of the recording / reproducing range on the recording surface of the optical disc 400. In FIG. 5, the driving state of the optical pickup 240 has not changed with respect to FIG. 4, but the boss 241 a provided on the movable rack 241 starts engaging with the cam groove 230 a of the lock rod 230, and the lock spring 220. Start contact with.

  Next, FIG. 6 shows a state in which the optical pickup 240 has further moved in the inner circumferential direction from the state of FIG. 5 and has reached the innermost circumferential end. In the state shown in FIG. 6, the optical pickup 240 abuts on the traverse chassis 201 below the turntable 210, and movement in the inner peripheral direction of the optical disc is restricted. At this time, the pick pinion 140 and the movable rack 241 are still engaged, but the pick pinion 140 and the fixed rack 240e are disengaged.

  When the driving force is further transmitted from the state shown in FIG. 6 to the pick and pinion 140, the movable rack 241 is engaged with the pick and pinion 140, so that the movement is continued. The movable rack 241 is moved in the direction of arrow A while the rack spring 242 is extended by the driving force transmitted from the pick pinion 140. At this time, the optical pickup 240 is biased by the rack spring 242 and positioned and fixed to the traverse chassis 201.

  When the movable rack 241 continues to move, the boss 241 a provided on the movable rack 241 releases the restriction by the lock spring 220 that restricts the operation of the lock rod 230. Next, the boss 241a moves from the vertical portion of the cam groove 230a to the inclined portion, and accordingly, the lock rod 230 is moved in the arrow D direction.

  FIG. 7 shows a state in which the lock rod 230 moves in the direction of arrow D and the traverse unit 200 is unlocked with respect to the mechanical chassis 100. In the state shown in FIG. 7, the boss 241a is moved to the boundary between the inclined portion of the cam groove 230a and the horizontal portion, the lock rod 230 is moved in the direction of arrow D, and the fitting between the hole 100a and the boss 230b is released. ing.

  After the lock rod 230 is unlocked, the movable rack 241 is further moved in the direction of arrow A by the driving force from the rack and pinion 140. When the movable rack 241 is moved, the boss 241 a moves to the horizontal portion of the cam groove 230 a and a force in the direction of arrow A is applied to the lock rod 230. Then, the traverse unit 200 that is already unlocked by the lock rod 230 is slightly moved in the arrow A direction. When the traverse unit 200 is moved in the direction of arrow A, since the contact portion 201a and the contact portion 260a are in contact, the wall portion 204 presses and moves the tray 260 in the direction of arrow A, as shown in FIG. To.

  Next, FIG. 8 shows a state where the engagement between the movable rack 241 and the rack pinion 140 and the engagement between the rack portion 261 provided on the tray 260 and the tray pinion 170 are performed simultaneously. 1 to 7, the driving force generated by the driving motor 110 is transmitted to the rack and pinion 140 via the motor gear 111, the reduction gear 120, and the reduction gear 130, and the movable rack 241 and the fixed rack 240e. The optical pickup 240 and the traverse unit 200 are driven via the drive, but since the tray pinion 170 and the rack portion 261 of the tray 260 are not engaged with each other, the drive to the speed control gear 150, the direction gear 160, and the tray pinion 170 is performed. The transmission of force was a so-called idle state.

  In FIG. 8, when the tray 260 is moved in the arrow A direction together with the traverse unit 200, the rack portion 261 starts to engage with the tray pinion 170. Therefore, the engagement between the movable rack 241 and the rack and pinion 140 and the engagement between the rack portion 261 provided on the tray 260 and the tray pinion 170 are performed simultaneously.

  Further, the lock rod 230 is moved in the direction of arrow A together with the tray 260 by the traverse unit 200, so that the boss portion 230 b provided on the lock rod 230 slides on the slope 100 b provided on the mechanical chassis 100. It is pushed and moved in the D direction.

  The moving speed of the traverse unit 200 due to the engagement between the movable rack 241 and the rack pinion 140 and the moving speed of the tray 260 due to the engagement between the rack portion 261 provided on the tray 260 and the tray pinion 170 are the same. The adjusting gear 150 is used for adjustment. Further, the gear teeth are phased so that the constraint meshing condition is satisfied, and the movable rack 241 is flexibly supported to such an extent that the rack spring 242 can absorb the backlash of each part, and is driven by the movable rack 241 and the rack pinion 140. Thus, the competition between the rack portion 261 and the drive by the tray pinion 170 is avoided.

  In the state shown in FIG. 8B, the traverse unit 200 has its own weight and the cam mechanism of the follower boss 203 and the cam groove 102 so that the arrangement side end of the turntable 210 of the traverse unit 200 is lowered in the direction of arrow E. Is possible. However, the lowering operation is restricted by the contact surface 201a of the wall portion 204 of the traverse unit 200 and the contact surface 260a of the tray 260 being in contact with each other.

  Next, FIG. 9 shows a state where the traverse unit 200 is rotating and descending.

  In FIG. 9, when the lock rod 230 is moved in the direction of arrow D, the boss portion 241a moves to the horizontal portion of the cam groove 230a, and the movable rack 241 is restricted from moving in the direction of arrow A and in the opposite direction. Fixed to the traverse unit 200. Further, the movable rack 241 and the rack pinion 140 are disengaged.

  The driving force transmitted from the drive motor 110 is transmitted from the tray pinion 170 to the tray 260 via the rack portion 261, and the tray 260 is moved in the direction of arrow A. When the tray 260 is moved in the arrow A direction, the traverse unit 200 is moved in the arrow A direction following the movement of the tray 260 and is rotated and lowered in the arrow E direction (see FIG. 9B).

  That is, as shown in FIG. 9B, the follower boss 202 and the cam groove 101 are engaged, the follower boss 203 and the cam groove 102 are engaged, and the cam groove 101 is parallel to the moving direction of the tray 260. (Horizontal), the cam groove 102 can be moved up and down with respect to the moving direction of the tray 260. Therefore, the traverse unit 200 moves in the direction of arrow A in synchronization with the tray 260 so as to follow the tray 260 while the contact surface 201a and the contact surface 260a are in contact with each other due to its own weight and the urging force of the urging spring 250. The follower boss 202 can be rotated in the direction of arrow E around the axis.

  Next, FIG. 10 shows a state in which the traverse unit 200 has been rotated and lowered.

  As shown in FIG. 10, when the traverse unit 200 is rotated and lowered, the optical disk 400 placed on the turntable 210 is transferred to the disk placement surface 266 (see FIG. 3) of the tray 260. In addition, the clamper 310 that holds the optical disk 400 together with the turntable 210 is suspended from the turntable 201 and the optical disk 400 and suspended from the clamp plate 300.

  After the traverse unit 200 is lowered, the drive motor 110 continues to be driven, and the tray 260 on which the optical disk 400 is placed remains in the mechanical chassis 100 and continues to move in the direction of arrow A. At this time, the contact surface 260a of the tray 260 and the contact surface 201a of the traverse unit 200 are separated from each other.

  10B, the traverse unit 200 is lowered to a position where the turntable 210 and the optical pickup 240 do not hinder the movement of the tray 260.

  Next, when the tray 260 continues to move and is moved to the position shown in FIG. 11, the position of the tray 260 is detected by a detection switch (not shown), and the operation of the drive motor 110 is controlled to stop. When the operation of the drive motor 110 is stopped, the operation of the gear and the rack that are directly or indirectly meshed with the drive motor 110 is stopped, and the operation of the tray 260 is stopped. In the state shown in FIG. 11, the optical disk 400 can be placed on or removed from the disk placement surface 266 (see FIG. 3) of the tray 260.

  Next, the disk loading operation will be described.

  Since the disk loading operation is performed in the reverse procedure of the above-described disk ejection operation, it will be briefly described.

  In FIG. 11, after the optical disk 400 is placed on the tray 260, the user performs a disk mounting operation, whereby the drive motor 110 is rotated in the reverse direction to that described above, and each gear or rack operates in the reverse direction as described above. The tray 260 is moved in the direction opposite to the arrow A.

  When the tray 260 is moved to the position shown in FIG. 10, the contact surface 260a of the tray 260 and the contact surface 201a of the traverse unit 200 contact each other. When the tray 260 continues to move, the contact surface 260a presses the contact surface 201a, and the tray 260 moves the traverse unit 200 in the direction opposite to the arrow A.

  As the tray 260 continues to move, the traverse unit 200 rotates and rises to the state shown in FIG. 9B and places the optical disc 400 on the turntable 210. Further, the turntable 210 is attracted to the clamper 310 while the optical disk 400 is placed, and the clamping of the disk by the turntable 210 and the clamper 310 is completed.

  Next, the tray 260 and the traverse unit 200 are moved while holding the optical disc 400 by the turntable 210 and the clamper 310, and reach the state shown in FIG. 7 through FIG.

  Next, when the traverse unit 200 reaches the position shown in FIG. 7, the follower boss 202 comes into contact with the end of the cam groove 101 and the follower boss 203 comes into contact with the end of the cam groove 102. The movement of 200 stops.

  In the state shown in FIG. 7, the engagement between the tray pinion 170 and the rack portion 261 is released, and the engagement between the pick pinion 140 and the movable rack 241 starts. The movable rack 241 moves the traverse unit 200 slightly by pressing and moving the lock rod 230 in the reverse direction of the arrow A, and moves the lock rod 230 in the reverse direction of the arrow D, as shown in FIG. The unit 200 is locked.

  When the movable rack 241 is moved from the state shown in FIG. 6, the fixed rack 240e and the optical pickup 240 are moved in the reverse direction of the arrow A (FIG. 2A) by the pins 240f and 240g and the cam grooves 241d and 241e (both see FIG. 2). In the direction of arrow B). When the fixed rack 240e is moved in the direction of arrow B shown in FIG. 2A, the fixed rack 240e meshes with the pick pinion 140 as shown in FIG. 5, and the driving force from the drive motor 110 is transmitted to the fixed rack 240e. When the driving force is transmitted to the fixed rack 240e, the optical pickup 240 can be moved in the direction of arrow A or in the opposite direction.

  As described above, according to the present embodiment, cam grooves 101 and 102 that engage with the follower bosses 202 and 203 of the traverse unit 200 are provided in the mechanical chassis 100, and the traverse unit 200 is placed in the tray in synchronization with the opening and closing of the tray 260. The traverse unit 200 is moved up and down and rotated by moving it in the opening / closing direction of 260. Therefore, the movable part (cam slider 611 of the prior art) having a cam for raising and lowering the traverse unit 200 becomes unnecessary, and the number of parts can be reduced and the cost can be reduced.

  In addition, since the number of times of switching of the driving force can be reduced, the accuracy of the height position at the elevating end of the traverse unit 200 can be increased, and the operation sound of the mechanism can be reduced.

  Further, by arranging the drive motor 110 as a drive source in the mechanical chassis 100, the mass of the traverse unit 200 that performs the lifting and lowering operation can be reduced, and the load on the drive source can be reduced.

(Embodiment 2)
FIG. 12 is a cross-sectional view of the disk device 1 according to the second embodiment. Embodiment 2 is as follows. The operation and configuration are almost the same as those of the first embodiment. Hereinafter, different points will be mainly described.

  As shown in FIG. 12, in the second embodiment, the cam groove 101 formed in the mechanical chassis 100 is formed in a substantially “<” shape. By forming the cam groove 101 in such a shape, there is a difference between the support height of the follower boss 202 at the recording / reproducing position of the optical disc 400 and the support height at the drawing position of the optical disc 400.

  Further, the contact surface 260b is formed on the tray 260 so as to face the contact surface 260a with a gap through which the wall portion 204 can be inserted and removed.

  With the above configuration, after the driving force transmission to the traverse unit 200 is completed (see FIG. 9) during the ejecting operation of the optical disc 400, the contact surface 260b of the tray 260 presses the contact surface 201b of the traverse unit 200. It can be carried out.

  The section in which the contact surface 201a of the traverse unit 200 follows the tray 260 while contacting the contact surface 260a of the tray 260 can be adjusted by the self-weight or the urging spring 250, and the reliability of the operation can be improved.

  Further, a pin 230c (see FIG. 1) provided on the lock rod 230 for fixing the tray 260 in a state where the disk device performs recording and reproduction, and a coupling portion 262 (see FIG. 1) provided on the tray 260. This can be eliminated, the number of equipment can be reduced, and the cost can be reduced.

  Further, since the inclination of the traverse unit 200 when the optical disc 400 is ejected can be reduced and the inclination of the wall portion 204 can be reduced, the wall portion 204 is in contact with the contact portion when the tray 260 and the traverse unit 200 are moved. It can be smoothly inserted into and removed from the gap between 260a and 260b.

  In the first and second embodiments, the driving force from the driving motor 110 is transmitted to the optical pickup 240 and the tray 260 via a plurality of gears. However, as shown in FIG. It is good also as a structure which transmits a driving force by.

  FIG. 13 is a main part plan view showing a driving force transmission system from the driving motor 110. In FIG. 13, the first pulley 510 is coaxially fixed to the speed control gear 150. The second pulley 520 is coaxially fixed to the tray pinion 170. A belt 500 is suspended between the first pulley 510 and the second pulley 520. Further, the drive speeds of the tray 260 and the optical pickup 240 can be freely adjusted by making the diameters of the first pulley 510 and the second pulley 520 arbitrary. Further, the pick pinion 140 and the tray pinion 170 can be freely arranged.

  With the configuration as described above, the driving force transmitted from the driving motor 110 to the pick pinion 140 via the gear can be transmitted to the tray 260 by the belt 500. Therefore, the speed control gears 160 and 170 are not necessary, the number of parts can be reduced, and operation noise can be reduced.

  The disk device of the present invention is useful for a tray loading type disk device.

FIG. 2 is a plan view showing the configuration of the disk device according to the first embodiment of the present invention. Sectional drawing of the ZZ part in FIG. 1A Partial plan view of the vicinity of the lock rod of the disk drive according to Embodiment 1 FIG. 3 is a plan view showing the configuration of the traverse unit in the first embodiment. Surface plan view in the vicinity of the movable rack in the traverse unit in the first embodiment. The top view which shows the state which looked at the tray in Embodiment 1 from the back surface side Sectional drawing of the YY part in FIG. 3A FIG. 3 is a plan view of the recording / reproducing state of the disk device according to the first embodiment. Sectional drawing of the ZZ part in FIG. 4A FIG. 3 is a plan view showing a state in which the optical pickup of the disk device in Embodiment 1 has moved to the inner periphery of the disk. The top view of the state which the optical pick-up of the disc apparatus in Embodiment 1 moved to the innermost periphery of the disc FIG. 3 is a plan view of a state in which the tray and the traverse unit of the disk device in the first embodiment start moving. The top view of the state which the tray rack and tray pinion of the disc apparatus in Embodiment 1 started meshing | engagement Sectional drawing of the ZZ part in FIG. 8A FIG. 3 is a plan view showing a state where the traverse unit of the disk device in the first embodiment starts to descend. Sectional drawing of the ZZ part in FIG. 9A FIG. 3 is a plan view of a state where the descending of the traverse unit of the disk device in Embodiment 1 is completed. Sectional drawing of the ZZ part in FIG. 10A FIG. 3 is a plan view when the tray of the disk device in the first embodiment is in a pulling position. Sectional drawing of the disk apparatus in Embodiment 2. Partial plan view showing a configuration example of a driving force transmission system of a disk device Plan view of a conventional disk device Side view of a conventional disk device Plan view of cam slider in conventional disk device Plan view of a conventional disk device Side view of a conventional disk device Plan view of cam slider in conventional disk device Plan view of a conventional disk device Side view of a conventional disk device Plan view of cam slider in conventional disk device Plan view of a conventional disk device Side view of a conventional disk device Plan view of cam slider in conventional disk device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disk apparatus 100 Mechanical chassis 101, 102 Cam groove 110 Drive motor 120, 130 Reduction gear 140 Pick pinion 170 Tray pinion 200 Traverse unit 201 Traverse chassis 201a, 201b Contact surface 202, 203 Followers boss 210 Turntable 230 Lock rod 240 Light Pickup 241 Movable rack 241a Boss 242 Rack spring 250 Biasing spring 260 Tray 260a, 260b Abutting surface 261 Rack portion

Claims (9)

A tray on which an optical disk can be placed;
A turntable for rotatably supporting the optical disc;
An optical pickup for writing an information signal to the disk rotated on the turntable and / or reading an information signal recorded on the optical disk;
A pickup driving mechanism for moving the optical pickup between the inner peripheral side and the outer peripheral side of the optical disc;
A disk loading mechanism for transferring the tray so that the optical disk can reciprocate between a first position above the turntable and a second position outside the apparatus;
A mechanical chassis that forms the base of the device body;
A drive motor;
A transmission mechanism for transmitting a driving force from the driving motor to the pickup driving mechanism and the disk loading mechanism;
In the mechanical chassis, the traverse unit is supported so as to be movable in the rotation axis direction of the turntable and movable in the transfer direction of the tray, and includes the optical pickup, the pickup moving mechanism, and the turntable. And
When the tray is in the first position, by continuously rotating the drive motor in the first rotation direction, the pickup drive mechanism is driven to move the optical pickup in the inner circumferential direction of the optical disc, The traverse unit is moved in the tray discharge direction, the traverse unit presses and moves the tray in the discharge direction, and the drive force from the transmission mechanism is transmitted to the loading mechanism when the tray and the loading mechanism are engaged with each other. The tray is transferred to the second position,
When the tray is in the second position, the tray is moved in the insertion direction by continuously rotating the drive motor in the reverse direction of the first rotation direction, and the tray presses the traverse unit. A disk device, wherein the disc drive is moved, the traverse unit is moved in an insertion direction by meshing the transmission mechanism and the pickup drive mechanism, and the tray is moved to a first position.   The disk device according to claim 1, wherein the traverse unit is provided with an abutting portion that abuts a part of the tray, and the abutting portion is provided near a rear end in a discharge direction of the tray.   The relative height of the contact portion between the contact portion and the tray is changed during the movement of the traverse unit, and a drive section for synchronizing the traverse unit with the transfer operation of the tray is adjustable. Item 3. The disk device according to Item 2.   The disk device according to claim 1, wherein the traverse unit is supported in the chassis so as to be rotatable in a direction of a rotation axis of the turntable. A cam groove is formed on the side surface of the mechanical chassis along the transfer direction of the tray.
The traverse unit is provided with a follower boss that is movably engaged with the cam groove,
5. The disk apparatus according to claim 1, wherein the cam groove is formed so that the traverse unit can be guided in the rotation axis direction and the tray transfer direction.   The disk device according to claim 1, wherein the drive motor is disposed in the chassis.   The disk device according to claim 1, wherein the transmission mechanism is arranged in the chassis. A restriction member capable of restricting movement of the traverse unit in the rotational axis direction when the tray is in the first position;
The disk device according to claim 1, wherein the restriction member is switched to a restriction state or a restriction release state as the pickup driving mechanism moves. The disk device according to claim 1, wherein a drive mechanism including a belt and a pulley is arranged in the transmission mechanism.

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