JP2007018658A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device in which pickup drive operation, traverse mechanism drive operation, and tray opening and closing operation are performed by the same motor and switching of drive force transmission can be performed smoothly with simple constitution. <P>SOLUTION: Tray open operation is started, a pickup unit 3 is in the most inner peripheral position, a sub-rack 17 front edge presses an outer peripheral plane of a tray gear 8. Thereby, the tray gear is rotated a little temporarily, since a cam groove C provided at an upper plane of a large diameter gear part 8a of the tray gear 8 pushes out a little a boss 6g projected from a lower plane pf a cam slider 6 engaged with this, the cam slider 6 is slid to the left side slightly in a figure. At this time, a rack part 6f of the cam slider 6 is started to engage to a small diameter gear part 8b. Also, a flat gear 5a running idle due to opposing to a lacking teeth part 8aa of the large diameter gear part 8a untill then is started to engage with teeth of the large diameter gear part 8a by some rotation of the tray gear 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a disk device that performs recording or reproduction on a disk such as a CD or a DVD, and more particularly to a mechanism that transmits and switches driving force.

Conventionally, as a disk device, a disk tray on which a disk is placed is moved into the main body, the disk is clamped between a disk holder (clamper) provided in the main body and a turntable, and recording or recording on the disk is performed. What is made to perform reproduction is known.
In recent years, various proposals have been made to improve the mechanism for transmitting and switching the driving force.

For example, Patent Document 1 discloses a tray drive mechanism that can drive an optical disk clamping operation and a tray opening / closing operation with a feed motor while having a simple configuration. Specifically, by using a rack member, a plate member, and a cam slider that are necessary for the clamping operation of the optical disc, the output of the feed motor is transmitted to the tray when the tray is opened and closed. Without adding, the feed motor can perform clamp driving and tray opening / closing drive of the optical disc, and the manufacturing cost of the optical disc apparatus can be reduced.

Further, Patent Document 2 discloses an optical disc apparatus that switches between a pickup feeding operation and a turntable lifting / lowering operation without largely moving the optical pickup toward the inner periphery of the optical disc. Specifically, by switching between the pickup driving operation and the turntable lifting operation by an operation independent of the optical pickup, it is not necessary to move the optical pickup further to the inner peripheral side of the optical disk during the switching operation. The configuration is as follows. As a result, it is possible to perform the pickup feeding operation and the turntable lifting operation using the same dual-purpose drive source while avoiding interference between the optical pickup and the rotation drive mechanism.
JP 2004-288333 A Japanese Patent Laid-Open No. 2004-253130

However, any of the configurations described in the above patent documents has a structure in which a slide member is moved by a boss provided at the tip of the rack member to transmit a driving force. In some cases, the member cannot be moved smoothly, and an excessive force is applied between the gear that drives the rack member and the rack, which may cause a problem such as a tooth kicking sound.

In view of the above-described problems, the present invention can perform a pickup drive operation, a traverse mechanism drive operation, and a tray opening / closing operation with the same motor with a simple configuration, and can smoothly switch driving force transmission. Another object is to provide a disk device.

In order to achieve the above object, the present invention has a chassis fixed to the apparatus main body, a traverse mechanism capable of moving up and down in a predetermined direction with respect to the chassis via a plurality of gears by driving a motor, and an optical pickup. A pickup unit provided in the traverse mechanism and movable in a direction substantially perpendicular to the raising / lowering direction of the traverse mechanism by driving the motor, and with respect to the raising / lowering direction of the traverse mechanism and the moving direction of the pickup unit A cam slider provided on the chassis so as to be movable in a substantially orthogonal direction,
A disc device including a shift lever provided in the traverse mechanism so as to move the traverse mechanism up and down by cam engagement with the cam slider, and meshing with a tray for transporting the disc and a rack portion thereof. A tray gear for driving the tray is provided, the tray on which the disk is placed is moved into the apparatus main body, and the disk is clamped between a clamper provided in the apparatus main body and a turntable provided in the traverse mechanism. In the disk device for recording or reproducing the disk by the optical pickup, the disk device has a rack member that moves the pickup unit by driving the motor, and the tray gear outer periphery is at the tip of the rack member when the tray is opened. Is pressed and temporarily rotated, so that the tray With a rack portion of the gear and the cam slider starts to mesh, said tray gear is characterized by being adapted to start rotating in conjunction with the driving of the motor.

Further, when the cam slider moves due to the rotation of the tray gear, the rack member is pulled and held by the cam slider.
Further, the rack member is held by the chassis instead of the cam slider when the traverse mechanism is lowered by the movement of the cam slider.

According to the present invention, with a simple configuration, a pickup driving operation and a traverse mechanism driving operation,
In addition, it is possible to provide a disk device capable of smoothly switching the driving force by performing the tray opening / closing operation with the same motor.

Specifically, by using existing parts such as a subrack and a cam slider, it is possible to switch driving force transmission without using a separate slide member as in the prior art. In addition, since there is no action of kicking the gear during each operation of the present invention,
Generation of a tooth kick sound is also prevented.

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

FIG. 1 is a diagram showing a disk loader of a disk device according to Embodiment 1 of the present invention, and FIG. 2 is a diagram mainly showing a traverse mechanism of the same disk device, and each is a plan view. In this disk device, a loader chassis 1 is provided with a tray (not shown) for conveying a disk, and a traverse mechanism 2 that can be swung up and down in a direction substantially perpendicular to the tray conveyance direction (front-rear direction). The loader chassis 1 is fixed to an apparatus main body (not shown).

The traverse mechanism 2 includes a pickup unit 3 having an optical pickup for recording or reproducing a disk, and a motor 4 for moving the pickup unit 3 in the radial direction of the disk.
And are provided. A transmission means 5 comprising a plurality of spur gears is attached to the motor 4, and the driving force of the motor 4 is decelerated and transmitted. The pickup unit 3 can be moved by the motor 4 when the transmission means 5 is engaged with a rack (not shown) formed in the pickup unit 3.

Further, the transmission means 5 meshes with the front tray gear 8, and the tray gear 8 can mesh with the cam slider 6 disposed on the loader chassis 1 side in front of the traverse mechanism 2. The cam slider 6 is cam-engaged with a shift lever 7 provided at the front portion of the traverse mechanism 2 and moves in a direction (left-right direction) substantially perpendicular to the tray transport direction (front-rear direction) and the traverse mechanism 2 lifting / lowering direction. it can. Thereby, the traverse mechanism 2 moves up and down. Further, the tray gear 8 can be meshed with a rack formed on the tray, and the tray gear 8 and the tray are coupled at a predetermined time so that the driving force of the motor 4 is transmitted to the tray.

In the disk device having the above configuration, when a disk is placed on the tray, the tray is transported into the disk loader by driving the motor 4. When the tray is arranged at a predetermined position, the connection between the tray and the tray gear 8 is released, and the cam slider 6 and the tray gear 8 are connected. The cam slider 6 moves in a direction perpendicular to the tray conveying direction (left-right direction) and raises the traverse mechanism 2. As a result, the traverse mechanism 2 is engaged with the disk and the disk is chucked.

The disk chuck portion will be described in detail. A substantially long plate-like clamper holder 9 is installed on the upper side of the loader chassis 1 in the left-right direction, and a substantially disk-like clamper 10 is rotatable at the center thereof. Is provided. On the other hand, a turntable 11 that is rotationally driven by a spindle motor (not shown) protrudes upward from the traverse mechanism 2. When the disc is chucked as described above, the traverse mechanism 2 is raised so that the center hole of the disc is fitted to the turntable 11, and the traverse mechanism 2 is further raised so that the disc is sandwiched between the turntable 11 and the clamper 10. It is.

When the disc is chucked, the connection between the tray gear 8 and the cam slider 6 is released,
The transmission means 5 is connected to the pickup unit 3. As a result, the pickup unit 3 can move in the radial direction of the disc, and recording or reproduction can be performed at a predetermined position on the disc. Further, when the disc is taken out, the reverse operation is performed. The driving force transmission switching structure will be described below.

FIG. 3 is a diagram showing a pickup unit driving portion of the disk loader of the present embodiment, and FIG. 4 is an enlarged view of a main part thereof, and each is shown in a bottom view. A rack assembly R that meshes with the feed gear 5b at the rear of the transmission means 5 is attached to the pickup unit 3, and is guided by the guide shaft 15 and driven by the motor 4 as shown in FIGS. It is driven in the radial direction of the disk by the feed gear 5b.

More specifically, the feed gear 5b includes a large-diameter gear portion 5ba and a small-diameter gear portion 5bb that are coaxially arranged, and the large-diameter gear portion 5ba is a drive gear (not shown) attached to the rotating shaft of the motor 4. The small-diameter gear portion 5bb that rotates in conjunction with the gear engages with the rack assembly R and drives it.

The rack assembly R includes a main rack 16 and a subrack 17, and the main rack 16 is fixed to the pickup unit 3, and the subrack 17 is slidably attached to the main rack 16. The subrack 17 overlaps with the main rack 16 to form the rack assembly R that meshes with the feed gear 5b.
Constitutes a double rack.

The subrack 17 is urged toward the outer periphery of the disk with respect to the main rack 16 by a coil spring (described later) having one end abutting on the main rack 16 and the other end abutting on the subrack 17. As a result, the feed gear 5b, the sub-rack 17 and the main rack 1
6 can be reduced, and the pickup unit 3 can be moved accurately.

When the disk reproducing / recording operation described above is completed, the feed gear 5b is rotated, whereby the pickup unit 3 and the rack assembly R are driven in the inner circumferential direction, and the inner circumferential stop position is reached. When the tray opening operation is started, the feed gear 5b further rotates, whereby the pickup unit 3 and the rack assembly R are further driven in the inner circumferential direction, and FIG.
The innermost circumferential position is as shown in FIG.

At this position, the engagement between the main rack 16 and the feed gear 5b is released, and only the sub-rack 17 is engaged with the feed gear 5b. Subrack 17
Further driven by the feed gear 5b, as shown in the plan view of FIG.
The teeth 17a provided on the right side surface of the tip press the protrusion P provided at one place on the outer peripheral surface of the tray gear 8. As a result, the tray gear 8 temporarily slightly rotates, and the cam groove C provided on the upper surface of the large-diameter gear portion 8a of the tray gear 8 is engaged with the cam slider 6 as shown in a plan view in FIG. Since the boss 6g protruding from the lower surface is slightly pushed out, the cam slider 6 slides slightly to the left in the figure.

At this time, the rack portion 6f of the cam slider 6 starts to mesh with the small diameter gear portion 8b disposed concentrically above the large diameter gear portion 8a. Until then, the missing tooth portion 8a of the large-diameter gear portion 8a.
The spur gear 5a at the front part of the transmission means 5 which has been idling because of being opposed to a starts to mesh with the teeth of the large-diameter gear portion 8a by the slight rotation of the tray gear 8 described above. 7 is the same as FIG.
FIG.

Subsequently, when the tray gear 8 is rotationally driven by the flat gear 5a, the cam slider 6 slides further to the left side of the drawing as shown in the plan view of FIG. 8, and the sub-rack 17 is provided by the rib 6h provided on the lower surface. A boss 17b provided on the top surface of the tip is held while being pulled forward of the apparatus. At this time, the feed gear 5b and the sub-rack 17 are disengaged as shown in the bottom view of FIG. In the figure, the coil spring 18 described above is drawn in the rack assembly R. 9 is an enlarged view of the main part of FIG. 8, and FIG. 11 is an enlarged view of the main part of FIG.

Here, FIG. 12 is an external view of the cam slider 6, FIG. 12 (a) is a bottom view, and FIG. 12 (b).
Is a rear view, FIG. 10C is a plan view, and FIG. The side view is not shown. As shown in FIG. 6A, the lower surface of the cam slider 6 has the large-diameter gear portion 8a.
A boss 6g that engages with a cam groove C provided on the upper surface protrudes. Further, a rib 6h for holding a boss 17b provided on the upper surface of the tip of the subrack 17 is provided. Further, as shown in FIG. 5B, cam grooves 6d and 6e for raising and lowering the traverse mechanism 2 are provided and engage with bosses 7a and 7b of the shift lever 7, respectively.

The cam groove 6d is a through-hole as can be seen from FIG.
Is a bottomed one. Further, as shown in FIG. 5C, bosses 6 i that engage with groove ribs 14 d described later provided on the lower surface of the tray 14 are provided on the left and right ends of the upper surface of the cam slider 6. Reference numeral 6f denotes a rack portion that meshes with the tray gear 8. Further, engaging portions 6a and 6b having a substantially L-shape in a side view projecting downward from the left and right ends of the cam slider 6 slide into slits 1a and 1b provided to the left and right of the front portion of the loader chassis 1, respectively. Engage possible.

When the cam slider 6 slides further from the state shown in FIG. 8, the traverse mechanism 2 descends along the inclined surfaces of the cam grooves 6d and 6e provided in the cam slider 6, and the boss 17b of the subrack 17 is camped until then. The state of being held by the rib 6h of the slider 6 is shown in FIG.
As shown in the plan view, the boss 17 c provided on the left side surface of the tip of the subrack 17 is taken over by the vertical rib 1 f provided on the loader chassis 1. 14 is the same as FIG.
FIG.

When the descending of the traverse mechanism 2 is completed, the boss 6i provided on the upper surface of the cam slider 6 moves along the slope of the groove rib 14d provided on the lower surface of the tray 14 as shown in FIG.
Push 4 forward a little. As a result, the small-diameter gear portion 8b of the tray gear 8 and the rack portion 14a provided on the lower surface of the tray 14 begin to engage with each other. Subsequently, the rack portion 14a is driven by the rotation of the tray gear 8, and the tray 14 is pushed forward. At this time, the boss 6i is already separated from the groove rib 14d, and the meshing between the small-diameter gear portion 8b and the rack portion 6f is also separated.

FIG. 16 is a bottom view of the tray. As shown in the figure, the tray 14 has a rack portion 14a that meshes with the tray gear 8 from the rear to the front on the right side of the lower surface (the position on the left side in the figure). Further, groove ribs 14 d that engage with the bosses 6 i provided on the cam slider 6 are provided at positions on the left and right of the front portion of the tray 14. The groove rib 14d has a portion extending in the left-right direction and a portion extending in the oblique direction. When the boss 6i is engaged with the portion extending in the left-right direction, the tray 14 is held in the loader chassis 1, and when the boss 6i is engaged with the portion extending in the oblique direction, the cam slider 6 is engaged. The tray 14 is slightly driven in the front-rear direction by sliding in the left-right direction.

Further, the rib 14e extends to the rear end of the tray 14 from the rear end of the groove rib 14d on the opposite side to the rack portion 14a. When the tray 14 is pushed forward by the rotation of the tray gear 8, the one boss 6i slides on the rib 14e, so that the tray 14 is stably driven while being guided, and the rack portion 14a and the tray gear are driven. 8 is prevented from being disengaged from the small-diameter gear portion 8b.

As described above, according to the present invention, it is possible to switch driving force transmission without using a separate slide member as in the prior art by using existing parts such as a subrack and a cam slider. ing. Further, since the gear is not kicked during each operation of the present invention, the occurrence of a tooth kick sound is also prevented.

1 is a diagram showing a disk loader of a disk device according to Embodiment 1 of the present invention. The figure which shows the traverse mechanism mainly of a disc apparatus. The figure which shows a pickup unit drive part. The principal part enlarged view of FIG. The figure which shows a mode that the tooth | gear of a subrack tip presses the protrusion of a tray gear outer peripheral surface. The figure which shows a mode that the cam groove provided in the tray gear pushes out the boss | hub of a cam slider. The principal part enlarged view of FIG. The figure which shows a mode that the boss | hub of a subrack tip is hold | maintained with the rib of a cam slider. The principal part enlarged view of FIG. The figure which shows a mode that the mesh | engagement of the gear for feed and the subrack came off. The principal part enlarged view of FIG. External view of cam slider. The figure which shows the state which hold | maintains the boss | hub of the subrack tip by the vertical rib of a chassis. FIG. 14 is a right side cross-sectional view of FIG. 13. The figure which shows a mode that the boss | hub of a cam slider pushes a tray along the slope of a groove rib. The bottom view of a tray.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loader chassis 2 Traverse mechanism 3 Pickup unit 4 Motor 5 Transmission means 6 Cam slider 7 Shift lever 8 Tray gear 9 Clamper holder 10 Clamper 11 Turntable 14 Tray 15 Guide shaft 16 Main rack 17 Subrack 18 Coil spring

Claims (4)

A chassis fixed to the apparatus main body, a traverse mechanism capable of moving up and down in a predetermined direction with respect to the chassis via a plurality of gears driven by a motor, an optical pickup, and provided in the traverse mechanism and driven by the motor A pickup unit that is movable in a direction substantially perpendicular to the raising / lowering direction of the traverse mechanism,
The traverse mechanism is moved up and down by cam engagement between the cam slider and a cam slider provided on the chassis so that the traverse mechanism can move in a direction substantially perpendicular to the moving direction of the traverse mechanism and the moving direction of the pickup unit. A disc device provided with a shift lever provided in the traverse mechanism,
A tray that conveys the disk and a tray gear that meshes with the rack portion to drive the tray are provided. The tray on which the disk is placed is moved into the apparatus main body, and the clamper and the traverse mechanism provided in the apparatus main body are moved. In the disk device that clamps the disk between the turntable provided on the disk and records or reproduces the disk by the optical pickup,
A rack member that moves the pickup unit by driving the motor, and when the tray opening operation is performed, the outer periphery of the tray gear is pressed at the end of the rack member and temporarily rotates, whereby the tray gear and the cam slider are The rack portion starts meshing, and the tray gear starts to rotate in conjunction with the drive of the motor. When the cam slider moves due to the rotation of the tray gear, the cam slider moves the rack member. When the traverse mechanism is lowered by the movement of the cam slider, the rack member is held by the chassis instead of the cam slider, and the traverse mechanism is lowered. Is completed, the Kamsula The tray by Zehnder is pushed out, the disk apparatus characterized by comprising so as to initiate engagement and the tray gear and the tray rack portion. A chassis fixed to the apparatus main body, a traverse mechanism capable of moving up and down in a predetermined direction with respect to the chassis via a plurality of gears driven by a motor, an optical pickup, and provided in the traverse mechanism and driven by the motor A pickup unit that is movable in a direction substantially perpendicular to the raising / lowering direction of the traverse mechanism,
The traverse mechanism is moved up and down by cam engagement between the cam slider and a cam slider provided on the chassis so that the traverse mechanism can move in a direction substantially perpendicular to the moving direction of the traverse mechanism and the moving direction of the pickup unit. A disc device provided with a shift lever provided in the traverse mechanism,
A tray that conveys the disk and a tray gear that meshes with the rack portion to drive the tray are provided. The tray on which the disk is placed is moved into the apparatus main body, and the clamper and the traverse mechanism provided in the apparatus main body are moved. In the disk device that clamps the disk between the turntable provided on the disk and records or reproduces the disk by the optical pickup,
A rack member that moves the pickup unit by driving the motor, and when the tray opening operation is performed, the outer periphery of the tray gear is pressed at the end of the rack member and temporarily rotates, whereby the tray gear and the cam slider are 2. A disk device according to claim 1, wherein the rack portion starts meshing and the tray gear starts to rotate in conjunction with driving of the motor. 3. The rack member is retracted and held by the cam slider when the cam slider is moved by rotation of the tray gear.
The disk device described in 1. 4. The disk device according to claim 3, wherein the rack member is held by the chassis instead of the cam slider when the traverse mechanism is lowered by the movement of the cam slider.

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