JP2012099187A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk device surely suppressing vibration during high-speed rotation of a disk for a long period.SOLUTION: A traverse chassis 5 consisting of a chassis body 5A mounted with a spindle motor 9 with a turntable 8 and an optical pickup 10 movable in a radial direction of a disk D thereon and a lever arm 5B made of synthetic resin is vertically movably arranged in a loader chassis 2. The lever arm 5B includes: a lever body 5a; and a pair of right and left arm parts 5b extending from both ends of the lever body 5a and rotatably pivoted on the loader chassis 2. A cam slider 12 slidably arranged in a front part of the loader chassis 2 and the lever arm 5B are interlocked and coupled by a cam mechanism 13. An elastically displaceable retaining piece 30 is integrally projected on an internal surface of a recess 29 formed by cutting off one end part of the lever body 5a, the retaining piece 30 is formed into a U-shape and the end part of the retaining piece 30 is elastically pressed on the loader chassis 2.

Description

The present invention relates to a disk device such as a Blu-ray Disc recorder (or player), for example, and in particular, it is possible to reliably suppress vibration during high-speed disk rotation over a long period of time.

Conventionally, as an example of a disk device, there is one shown in FIGS. 6 to 8, which is a Blu-ra.
y Disc type recorder (or player), in which a synthetic resin tray 1 for placing a disk D is disposed in a synthetic resin loader chassis 2, and both side plates 2 of the loader chassis 2
The tray 1 is engaged with the guide rail 4 on the shelf frame 3 integrally formed with a so as to be able to move forward and backward a, b,
A traverse chassis 5 comprising a metal chassis body 5A and a synthetic resin lever arm 5B
Is disposed in the loader chassis 2, and the rear portion of the chassis body 5A is connected to the loader chassis 2 via a rear elastic body 6 made of rubber so as to be able to move up and down c and d, and the front portion of the chassis body 5A. Is connected to the lever arm 5B via a front elastic body 7 made of rubber, and a spindle motor 9 with a turntable 8 and an optical pickup 10 with an objective lens OL movable in the radial direction of the disk D are mounted on the chassis body 5A. It is installed.

As shown in FIGS. 6 and 7, the lever arm 5B includes a lever body 5a extending along the left and right directions e and f perpendicular to the forward and backward a and b directions, and the backward b direction from both ends of the lever body 5a. And a pair of left and right arm portions 5b extending in the same manner, and a support shaft 5c integrally protruding from the free end of each arm portion 5b is fitted into a concave bearing portion 11 formed on each shelf frame 3 of the loader chassis 2. The lever arm 5B is pivotally supported about the support shaft 5c.

As shown in FIGS. 6 to 8, a cam slider 12 is slidably disposed along the left and right directions e and f at the front portion of the loader chassis 2, and a cam groove 13 a formed in the cam slider 12.
And a cam pin 1 that protrudes from the lever body 5a of the lever arm 5B and fits into the cam groove 13a.
The cam slider 12 and the lever arm 5B are interlocked and connected by a cam mechanism 13 composed of 3b, and the tip of the cam pin 13b is fitted in a vertical groove 14 formed in the front portion of the loader chassis 2 so as to be able to move up and down. In FIG. 6, reference numeral 15 denotes a feed motor for reciprocating the optical pickup 10 via a screw shaft mechanism 15a.

As shown in FIGS. 6 and 8, the pinion 16 is rotated forward and backward g,
The cam slider 17 is arranged so that it can be engaged with the pinion 16 and the cam slider 12
A tray rack 18 that can be engaged with the pinion 16 is integrally projected on the back surface of the tray 1 along the forward and backward movements a and b, and a pair of left and right guide pins 19 are integrally projected on the cam slider 12. .

In FIG. 7, reference numeral 21 denotes a clamper which is arranged at a central portion of the cross beam 22 constructed between both side plates 2 a of the loader chassis 2 so as to be able to move up and down within a certain range, and clamps the disk D with the turntable 8. In FIG. 8, reference numeral 23 denotes a tray pressing piece integrally protruding from both side plates 2 a of the loader chassis 2.

In the play mode, the traverse chassis 5 is moved up as shown by the solid line in FIGS.
Thus, the disk D on the tray 1 is lifted by the turntable 8 and clamped by the turntable 8 and the clamper 21, and the disk D is moved by the spindle motor 9 via the turntable 8. While rotating at high speed, the optical pickup 10 is reciprocated by the feed motor 15 via the screw shaft mechanism 15a.
A laser beam is projected from L to the disk D, and information recorded on the disk D is read based on the reflected light.

When the tray is opened, the optical pickup 10 is moved to the inner peripheral side of the disk D by the feed motor 15 through the screw shaft mechanism 15a, and the pinion 16 is rotated forward.
The cam slider 12 is slid in the direction of the arrow f through the cam rack 17 meshing with the pinion 16, and thereby the traverse chassis 5 is moved down d through the cam mechanism 13 (FIG. 7).
The disk D on the turntable 8 is transferred onto the tray 1.

Then, by engaging each guide pin 19 with the inclined surface (not shown) of the tray 1,
The tray 1 is moved forward a to engage the tray rack 18 with the pinion 16, and the pinion 16
The forward rotation g of the tray 1 advances the tray 1 through the tray rack 18 (see the phantom line state in FIGS. 6 and 7).

6 and 7, vibration generated when the disk D is rotated at high speed via the turntable 8 by the spindle motor 9 in the play mode indicated by the solid line in FIGS. 6 and 7 is transmitted to the optical pickup 10 via the traverse chassis 5. Therefore, the elastic bodies 6 and 7 are used as the first means for suppressing the vibration in order to prevent the optical pickup 10 from causing a reading error.
A damping mechanism 25 is used as the second means.

As shown in FIGS. 6 and 8, the vibration damping mechanism 25 is integrally projected at the center of the outer surface of one arm portion 5b of the traverse chassis 5 and extends in a direction perpendicular to the longitudinal direction of the arm portion 5b. And a U-shaped piece 27 that is elastically displaceable left between the slits formed in the shelf frame 3 so as to face the protruding piece 26.

In the above configuration, the tip of the U-shaped piece 27 is elastically pressed against the protruding piece 26, and the cam pin 13b is pressed against the inner side surface 14a of the vertical groove 14 by the pressing force. The lever arm 5B of the traverse chassis 5 is sandwiched between the inner side surface 14a. In addition, there exists what was described in patent document 1 as a related technique.

JP 2005-71552 A

In the above-described conventional configuration, the traverse chassis 5 is elastically pressed against the protrusion 26 integrally protruding from the center of the outer surface of the arm portion 5b of the lever arm 5B.
Since the U-shaped piece 27 is away from the lever body 5a that is most susceptible to vibration of the traverse chassis 5, the vibration suppressing function cannot be effectively exhibited.

Further, since the protruding piece 26 is always in contact with the tip of the U-shaped piece 27, there is a possibility that fatigue is accumulated in the U-shaped piece 27 and the elasticity is lowered.

An object of the present invention is to provide a disk device capable of reliably suppressing vibration during high-speed rotation of a disk over a long period of time based on the above-described conventional defects.

In order to achieve the above object, a traverse chassis comprising a chassis body on which a spindle motor with a turntable and an optical pickup movable in the radial direction of a disk are mounted, and a synthetic resin lever arm is provided as a loader. The lever arm has a lever body and a pair of left and right arm portions that extend from both ends of the lever body and are pivotally supported by the loader chassis. A cam slider slidably arranged at the front of the chassis and the lever arm are interlocked and connected by a cam mechanism, and a vibration suppression mechanism for suppressing vibration of the lever arm is provided.
In the disk device, in which the disk is rotated at a high speed via a turntable by a spindle motor, the information recorded on the disk is read by an optical pickup, and the vibration of the lever arm is suppressed by the vibration suppression mechanism. Has a resiliently displaceable restraining piece integrally formed on the inner surface of a recess formed by cutting out one end of the lever main body, the restraining piece is formed in a U shape, and its tip is attached to the loader chassis. It is characterized by being elastically pressed.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, an intermediate part from the central bent part to the tip part of the holding piece is formed in a tapered shape.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the loader chassis is formed with a concave step portion facing the tip end portion of the holding piece in the downward movement state of the traverse chassis. It is a feature.

According to the first aspect of the present invention, the tip of the elastically displaceable holding piece provided at one end of the lever main body constituting the traverse chassis is elastically pressed against the loader chassis, and the holding piece is the traverse chassis. Therefore, the vibration at the time of high-speed disk rotation can be surely suppressed.

Since the holding piece is U-shaped and compact, the holding piece can be efficiently stored in a limited space in the loader chassis.

Since the restraining piece is formed in a U-shape and its spring length is set large, the stress applied to the restraining piece is dispersed, for example, the room temperature is kept high (eg, 60 ° C.) while being stored in a warehouse. Even if it becomes, the holding piece can be prevented from being deformed.

According to the second aspect of the present invention, since the intermediate portion of the holding piece is formed in a tapered shape, the intermediate portion is appropriately bent so that the tip portion of the holding piece is elastic to the loader chassis. Can be pressed against.

In addition, since the cross section of the central bent portion of the holding piece is set to be large, it is possible to prevent the central bent portion from being deteriorated due to concentrated stress.

According to the invention described in claim 3, by lowering the traverse chassis, the tip of the holding piece faces the concave stepped portion, and the load applied to the tip is eliminated or reduced. The elasticity of the holding piece can be properly maintained over a long period of time.

It is a top view of the disc apparatus which is one Embodiment of this invention. It is an AA arrow line view of FIG. It is a perspective view of the lever arm. (A) is the expansion perspective view of the principal part, (b) is a BB arrow directional view, (c) is CC arrow directional view. (A) is the expanded horizontal sectional view of the principal part, (b) is a partially notched front view of the principal part. It is a top view which shows a prior art example. It is the longitudinal cross-sectional view. It is the DD arrow line view of FIG.

1 to 5 show a disk apparatus according to an embodiment of the present invention.
A u-ray disc type recorder (or player) having a traverse chassis 5
A vibration damping mechanism 25 is provided in the lever body 5a of the lever arm 5B that constitutes the holding arm 3 and the vibration damping mechanism 25 is disposed in a recess 29 formed by cutting out one end of the lever body 5a.
0. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 6 to 8, the same reference numerals are given to the same portions and the description thereof is omitted.

As shown in FIGS. 4 and 5, the holding piece 30 includes a base end portion 30 a extending in the forward a direction from the inner surface 29 a along the left and right directions e and f of the concave portion 29, and a U end from the base end portion 30 a. A central bent portion 30b bent in a letter shape, and an intermediate portion 3 extended from the central bent portion 30b in the backward b direction.
0c and a front end portion 30d connected to the intermediate portion 30c and extending in the vertical direction
It is formed in a letter shape.

As shown in FIG. 4B, the base end portion 30a and the central bent portion 30b of the holding piece 30 are formed to have a rectangular cross-sectional thickness, and in particular based on the width of the central bent portion 30b where stress is concentrated. It is larger than the end portion 30a and has sufficient strength.

As shown in FIG. 4 (c), the intermediate portion 30c of the holding piece 30 has a rectangular cross section and is set to have a tapered shape by setting the cross section to be smaller than the central bent portion 30b. Thus, it is formed to be elastically displaceable. Further, as shown in FIG. 5 (a), the distal end portion 30d is inclined toward the central curved portion by tilting the distal end side outward from the center of the intermediate portion 30c at a predetermined inclination angle α (for example, 2 ° to 5 °). It is positioned outside 30b.

As shown in FIG. 4A, the distal end portion 30 d of the holding piece 30 has a prismatic shape, and the intermediate portion 30.
The inclined guide surface 31 is formed by chamfering the outer corner of the protruding portion protruding upward from c.

As shown in FIGS. 2 and 5 (b), in the downward movement d state of the traverse chassis 5 (see the phantom line in FIG. 7), the inside of the shelf frame 3 of the loader chassis 2 is opposed to the tip 30d of the holding piece 30. Side 3a
A concave step 32 is formed in the bottom.

In the play mode, the traverse chassis 5 is moved up as shown in FIGS.
As shown in FIG. 5B, the intermediate portion 30c of the holding piece 30 is bent and the tip 30d of the holding piece 30 is elastically formed on the inner side surface 3a of the shelf frame 3 by making the horizontal posture. The cam pin 13b is pressed against the inner side surface 14a of the vertical groove 14 by the pressing force, and the lever arm 5B of the traverse chassis 5 is sandwiched between the holding piece 30 and the inner side surface 14a of the vertical groove 14.

In this state, when the disk D is rotated at high speed by the spindle motor 9 via the turntable 8, vibration generated by the high speed rotation is suppressed by the elastic bodies 6 and 7 as the first means, and the second means. It is restrained by the elastic displacement of the restraining piece 30.

According to the above configuration, since the holding piece 30 is provided on the lever body 5a that is most likely to vibrate of the traverse chassis 5, vibration during high-speed rotation of the disk D can be reliably suppressed.

Since the holding piece 30 is U-shaped and compact, the holding piece 30 can be efficiently stored in a limited space in the loader chassis 2.

As shown in FIG. 5 (a), since the holding piece 30 is formed in a U shape and its spring length L is set to be large, the stress applied to the holding piece 30 is dispersed and stored in a warehouse, for example. Even if the room temperature becomes high (for example, 60 ° C.) in the state of being, the restraining piece 30 can be prevented from being deformed.

Since the intermediate portion 30 c of the holding piece 30 is formed in a tapered shape, the intermediate portion 30 c is appropriately bent so that the tip portion 30 d of the holding piece 30 is elastically attached to the inner side surface 3 a of the shelf frame 3. Can be pressed.

As shown in FIG. 4B, since the cross section of the central bent portion 30b of the holding piece 30 is set large, it is possible to prevent the central bent portion 30b from being stressed and deteriorated. it can.

When the traverse chassis 5 is moved downward d when the tray is opened, the tip 30d of the holding piece 30 faces the concave step 32, as indicated by a virtual line in FIG.
The distal end portion 30d is separated from the inner side surface 32a or the pressing is reduced, and the distal end portion 3
Since the load applied to 0d is eliminated or reduced, the elasticity of the holding piece 30 can be properly maintained over a long period of time.

2 Loader Chassis 5 Traverse Chassis 5A Traverse Chassis Chassis Body 5B Traverse Chassis Lever Arm 5a Lever Arm Lever Body 5b Lever Arm Arm 8 Turntable 9 Spindle Motor 10 Optical Pickup 25 Damping Mechanism 29 Recess 29a Recess Inner Surface 30 Retaining piece 30b Centrally bent portion 30c Retaining piece intermediate portion 30d Retaining piece tip 32 Recessed step 32a Inner side surface of recessed step

Claims (3)

A traverse chassis consisting of a spindle motor with a turntable and an optical pickup movable in the radial direction of the disk and a synthetic resin lever arm is disposed in the loader chassis so as to be movable up and down. A cam slider and a lever arm, each of which has a main body and a pair of left and right arm portions that extend from both ends of the lever main body and are pivotally supported by the loader chassis. Are linked by a cam mechanism and provided with a vibration control mechanism that suppresses the vibration of the lever arm. In the play mode, the information is recorded on the disk by rotating the disk at high speed via a turntable by a spindle motor. Is read by an optical pickup and the vibration of the lever arm is controlled. In the disk device, the vibration damping mechanism has a resiliently displaceable restraining piece integrally projecting on the inner surface of a recess formed by cutting out one end of the lever body. Is formed in a U shape, and its tip is elastically pressed against the loader chassis. 2. The disk device according to claim 1, wherein an intermediate portion from the central bent portion to the tip portion of the holding piece is formed in a tapered shape. 3. The disk device according to claim 1, wherein a concave step portion is formed in the loader chassis so as to be opposed to a tip portion of the holding piece in a downward movement state of the traverse chassis.

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