JP2007018671A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device in which phase deviation is not caused between a tray and a tray gear driving the tray with simple constitution. <P>SOLUTION: A large teeth part 10aa in which magnitude of a first tooth being an initial engaging part with a tray gear 8 is made magnitude of two teeth is provided in a track part 10a of the tray 10. On the other hand, in the same way, a large cog part 6aa in which magnitude of a first cog being an initial engaging part with a tray gear 8 is made magnitude of two gogs is provided in a rack part 6a of cam slider 6. Cog lost parts 8a, 8b in which a region of one cog or more are eliminated so as to engage corresponding to the respective large cog part are provided in 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 structure of a tray and a tray gear.

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.
However, in such a conventional disk device, a so-called phase shift occurs between the tray and the tray gear that drives the tray due to a slight timing shift when the tray is moved or a load applied to the tray. There is.

FIG. 4 is a plan view showing a tray portion in a conventional disk device.
In the figure, the positional relationship of each part when the tray is closed is depicted in a state where the tray is seen through.
FIG. 5 is a detailed view of a portion A surrounded by a one-dot chain line in FIG. 4, and is an enlarged view of the tray gear and the vicinity thereof. As shown in these drawings, the loader chassis 1 is provided with a tray 10 that conveys the disk in the front-rear direction and a cam slider 6 that slides in the left-right direction to raise and lower a traverse mechanism described later.

A rack portion 10 a extends in the front-rear direction on the right side of the lower surface of the tray 10, and a rack portion 6 a extends in the left-right direction on the right rear portion of the cam slider 6. Each rack portion can mesh with the tray gear 8, and the tray gear 8 rotates in the front-rear direction when the tray gear 8 rotates while the rack portion 10a is engaged, and the tray gear 8 rotates when the rack portion 6a is engaged. Thus, the cam slider 6 slides in the left-right direction.

When the tray 10 is opened from the state shown in the drawing, the tray gear 8 rotates to the right and the rack portion 10
As a result, the tray 10 is driven to move forward. Further, when the cam slider 6 is slid from the state shown in the figure, the tray gear 8 rotates counterclockwise and starts to mesh with the rack portion 6a, and the cam slider 6 is driven to slide rightward to raise a traverse mechanism to be described later. .

However, conventionally, as shown in each figure, the tray gear and each rack portion have the same tooth size and pitch, so the tray 10 or the cam can be moved due to a slight timing shift or abnormal load during movement. A so-called phase shift may occur between the slider 6 and the tray gear 8 that drives the slider 6, particularly when teeth are engaged. When such a phase shift occurs, the teeth that should be meshed with each other are not meshed with each other, so that the disk transport operation and chucking operation cannot be performed normally. Therefore, in recent years, a device for preventing phase shift between a tray and a tray gear has been proposed.

For example, Patent Document 1 discloses a disk device that prevents the engagement between the tray rack and the drive gear when the tray is assembled. Specifically, a relief portion is provided between the teeth of the drive gear, and a wide portion having a width corresponding to the relief portion is provided in the introduction portion of the rack of the tray, and the tray width is increased in the process of assembling the tray. The engagement position of the rack of the tray that engages with the relief portion of the drive gear and meshes with the first gear coincides with the engagement position of the rack of the movable base drive member, and the second gear is aligned once. The tray can be securely assembled by operation.
JP 2002-288916 A

However, the configuration as described in Patent Document 1 cannot be applied when specific meshing alignment of the drive gear is necessary. In addition, when such meshing alignment is necessary, conventionally, assembly is performed while regulating the direction of the gear that drives the tray with a jig or the like when the tray is inserted, which is inconvenient and poor in workability. It was.

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 has a simple configuration and prevents a phase shift between a tray and a tray gear that drives the tray.

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 first tooth of the rack portion of the tray is set to a large tooth portion larger than the other teeth, and the tray gear meshes with the large tooth portion. One missing tooth portion is provided.

Further, the first tooth of the rack portion of the cam slider is a large tooth portion larger than the other teeth, and a second missing tooth portion that meshes with the large tooth portion is provided in the tray gear. Further, a large tooth portion that meshes with the first or second missing tooth portion is provided in the entire rack portion of the tray.

According to the present invention, it is possible to provide a disk device that has a simple configuration and prevents a phase shift between a tray and a tray gear that drives the tray.

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

FIG. 1 is a plan view showing a disk loader of a disk apparatus according to Embodiment 1 of the present invention. 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 the rack portion 3 a 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.

Specifically, the chuck portion of the disk is described above. A clamper holder is installed on the upper side of the loader chassis 1 in the left-right direction, and a substantially disc-shaped clamper is rotatably provided at the center (not shown). (Illustrated). On the other hand, a turntable 9 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 center hole of the disc is fitted into the turntable 9 by raising the traverse mechanism 2, and the disc is sandwiched between the turntable 9 and the clamper by further raising the traverse mechanism 2. .

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.

FIG. 2 is a diagram showing a tray portion in the present embodiment, and is a plan view. In the figure, the positional relationship of each part when the tray is closed is depicted in a state where the tray is seen through. In addition, FIG.
FIG. 3 is a detailed view of a portion A surrounded by a one-dot chain line in FIG.
In addition, the same code | symbol is attached | subjected to the part which has the same function as the said prior art, and detailed description is abbreviate | omitted suitably.

As shown in these drawings, in the present embodiment, in the rack portion 10a of the tray 10, a large tooth portion 10aa having a size corresponding to two teeth on the first tooth that becomes the first meshing portion with the tray gear 8 is provided. . On the other hand, the rack portion 6a of the cam slider 6 is also provided with a large tooth portion 6aa having a size corresponding to the first tooth as the first meshing portion with the tray gear 8 corresponding to two teeth. The tray gear 8 is provided with missing tooth portions 8a and 8b corresponding to the large tooth portions, in which a region of one tooth or more is deleted so that they mesh with each other.

As a result, the amount of misalignment between the tray gear 8 and each rack portion is absorbed, and the margin for phase misalignment is improved. Then, the phase shift between the tray gear 8 and each rack part due to a slight timing shift during movement including the play element of the tray 10 or the cam slider 6 or an abnormal load such as a user pushing the tray 10 or the like. Is preventing. Further, in addition to the first large tooth portion 10aa, the missing tooth portion 8a of the tray gear 8 extends over the entire rack portion 10a of the tray 10.
, 8b are provided corresponding to the large tooth portions 10aa, 10ab. Thereby, tooth skipping can be prevented over the whole area of the rack part 10a.

In manufacturing the disk device, the tray 10 and the cam slider 6 can be assembled to the loader chassis 1 while engaging the large teeth 10aa and 6aa with the missing teeth 8a and 8b of the tray gear 8, respectively. Therefore, workability during assembly and maintenance is improved, and phase shift during assembly is reliably 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 tray part in a present Example. FIG. 3 is a detailed view of a portion A surrounded by an alternate long and short dash line in FIG. 2. The figure which shows the tray part in the conventional disc apparatus. FIG. 5 is a detailed view of a portion A surrounded by a one-dot chain line in FIG. 4.

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 Turntable 10 Tray

Claims (3)

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,
The first tooth of the rack portion of the tray is set to be a large tooth portion larger than the other teeth, the tray gear is provided with a first missing tooth portion that meshes with the large tooth portion, and the first tooth of the rack portion of the cam slider is provided. A larger tooth portion larger than the other teeth is provided, the tray gear is provided with a second missing tooth portion that meshes with the larger tooth portion, and further, the large tooth portion that meshes with the first or second missing tooth portion over the entire rack portion of the tray. A disk device comprising a tooth 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,
1. A disk device according to claim 1, wherein a first tooth of a rack portion of the tray is a large tooth portion larger than other teeth, and a first missing tooth portion that meshes with the large tooth portion is provided in the tray gear. The first tooth of the rack portion of the cam slider is a large tooth portion larger than the other teeth, and a second missing tooth portion that meshes with the large tooth portion is provided in the tray gear. Disk unit.

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