JP2012099183A - 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. A retaining piece 30 is integrally formed on an internal surface of a recess 29 formed by cutting off one end part of the lever body 5a via an elastically displaceable connection arm 31, and 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. 7 to 9, 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. 7 and 8, the lever arm 5B includes a lever body 5a extending in the left and right directions e and f perpendicular to the forward and backward a and b directions, and a reverse 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. 7 to 9, 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. 7, reference numeral 15 denotes a feed motor for reciprocating the optical pickup 10 via a screw shaft mechanism 15a.

As shown in FIGS. 7 and 9, a pinion 16 is rotated in the forward and reverse directions 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. 8, 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. 9, reference numeral 23 denotes a tray pressing piece that protrudes integrally 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 lines 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. 8).
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. 7 and 8).

7 and 8, 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 FIG. 7 and FIG. 8 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. 7 and 9, 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.

The vibration suppression function by the vibration control mechanism 25 is checked by the eccentric gravity center test. This is to examine how much the vibration generated by rotating the test disk D designed at an eccentric center of gravity can be suppressed at a high speed. As related technology, Patent Document 1
There is something described in.

JP 2009-4018 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 can be effectively exhibited in the eccentric gravity test. could not.

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. However, it has a holding piece integrally formed on the inner surface of the recess formed by cutting out one end portion of the lever body via a connecting arm that can be elastically displaced, and the holding piece is elastically pressed against the loader chassis. It is characterized by being.

According to a second aspect of the present invention, in the first aspect of the present invention, a pair of the connecting arms are formed in an L shape and are parallel to each other at a predetermined interval. The part is integrally formed on the inner surface of the recess, and the central part connected to the base end is extended upward,
A distal end portion connected to the central portion is extended laterally to be integrally formed with the holding piece, and a coupling rod for integrally coupling the proximal end portions of the pair of coupling arms is provided, and the proximal end portions of the pair of coupling arms Is characterized in that it is formed wider than the central part and the tip part.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a spring is interposed between the holding piece and the inner surface of the recess.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a concave step is formed in the loader chassis so as to face 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 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 most vibrated lever main body of the traverse chassis. Therefore, in the eccentric gravity center test, vibration during high-speed disk rotation can be reliably suppressed.

According to the second aspect of the present invention, the pair of connecting arms that support the holding pieces are formed in an L shape, the spring length thereof is set to be large, and the base ends of the pair of connecting arms by the connecting rod. Since the parts are connected together, the stress applied to the parts is dispersed, so that the pair of connecting arms are not deformed even when the room temperature is high (eg 60 ° C.) while being stored in a warehouse. Thus, the holding piece can be held at a predetermined position.

Further, since the base end portions of the pair of connecting arms are formed wide, it is possible to prevent the stress from being concentrated on the base end portions and deteriorating.

Furthermore, since the center part of a pair of connection arms is formed in the narrow width | variety, this center part can be bent moderately and a control piece can be elastically pressed against a loader chassis.

According to the third aspect of the present invention, it is possible to suppress the vibration as desired in response to the increase in vibration accompanying the high-speed rotation of the disk by strengthening the pressing force of the holding piece against the loader chassis with the spring. it can.

According to the fourth aspect of the present invention, when the traverse chassis is moved downward, the holding piece faces the concave step portion, and the load applied to the holding piece is eliminated or reduced. It is possible to properly maintain the elasticity of the connecting arm that supports

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. It is an expansion perspective view of the principal part. (A) is an enlarged partially cutaway front view of the main part, and (b) is an enlarged horizontal sectional view of the main part. It is an expansion perspective view of the principal part of the disc apparatus which is the other embodiment of this invention. It is a top view which shows a prior art example. It is the longitudinal cross-sectional view. It is a BB arrow line view of FIG.

1 to 5 show a disk apparatus according to an embodiment of the present invention, which is a normal rotation model (for example, 1.5 to 2.5 times speed) Blu-ray Disc type player (or recorder). And a vibration damping mechanism 25 is provided in the lever main body 5a of the lever arm 5B constituting the traverse chassis 5, and the vibration damping mechanism 25 is formed in a recess 29 formed by cutting out one end of the lever main body 5a. The holding piece 30 is arranged via the elastic arm 31. Since the configuration other than the above is substantially the same as the configuration shown in FIG. 7 to FIG.

As shown in FIGS. 4 and 5, the holding piece 30 has a rectangular shape, and the outer side surface 30 a of the holding piece 30 protrudes laterally from the traverse chassis 5 and faces the inner side surface 3 a of the shelf frame 3. The pair of protrusions 32 are integrally provided on the outer surface 30 a of the holding piece 30.

As shown in FIGS. 4 and 5, the elastic arms 31 are formed in an L shape and are provided in a pair so as to be parallel to each other at a predetermined interval.
9 is formed integrally with an inner surface 29a along the forward and backward a and b directions, a central portion 31b connected to the base end portion 31a is extended upward, and a distal end portion 31c connected to the central portion 31b is extended laterally. A connecting rod 31d that is integrally formed on the inner surface 30b of the holding piece 30 and integrally connects the base end portions 31a of the pair of connecting arms 31 is provided, and the base end portions 31a of the pair of connecting arms 31 are the central portion 31b and It is formed in a triangular shape that is wider than the tip 31c. In FIG. 4, 3
Reference numeral 4 denotes a spring protrusion that integrally projects from the inner surface 30 b of the holding piece 30 and the inner surface 29 a of the recess 29.

As shown in FIGS. 2 and 5 (a), the traverse chassis 5 is moved downward (see the phantom line in FIG. 8) so as to be opposed to the holding piece 30 and recessed on the inner surface 3a of the shelf frame 3 of the loader chassis 2. A step portion 33 is formed.

In the play mode, the traverse chassis 5 is moved up as shown by the solid line in FIGS.
As shown in FIG. 5A, the center portion 31b of the elastic arm 31 is bent so that the protrusion 32 of the holding piece 30 is elastically applied to the inner side surface 3a of the shelf frame 3. The cam pin 13b is pressed against the inner surface 14a of the longitudinal groove 14 by the pressing force, and the holding piece 3
The lever arm 5B of the traverse chassis 5 is sandwiched between 0 and the inner surface 14a of the longitudinal 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 restraining piece 30 is provided on the lever body 5a that is most susceptible to vibration of the traverse chassis 5, vibration during high-speed rotation of the disk D can be reliably restrained in the eccentric gravity test.

A pair of connecting arms 31 that support the holding pieces 30 are formed in an L shape, the spring length H (see FIG. 5A) is set large, and the connecting rod 31d is used to connect the pair of connecting arms 31 to each other. Since the base end portions 31a are integrally connected to each other, the stress applied to the base end portions 31a is dispersed. For example, even when the room temperature becomes high (eg, 60 ° C.) while being stored in a warehouse, the pair of connecting arms 31 The holding piece 30 can be held at a predetermined position without being deformed.

Moreover, since the base end part 31a of a pair of connection arm 31 is formed wide, it can prevent that stress concentrates on the base end part 31a and deteriorates.

Further, since the central portion 31b of the pair of connecting arms 31 is formed with a narrow width, the central portion 3
The restraining piece 30 can be elastically pressed against the inner side surface 3a of the shelf frame 3 by appropriately bending 1b.

When the tray is opened, the traverse chassis 5 is moved downward d, so that the holding piece 30 faces the concave step portion 33 and the inner side surface 33a of the concave step portion 33 as shown by the phantom line in FIG.
Accordingly, the pressing piece 30 is separated or pressed, and the load applied to the holding piece 30 is eliminated or reduced. Therefore, the elasticity of the elastic arm 31 can be properly maintained over a long period of time.

FIG. 6 shows a main part of a disk apparatus according to another embodiment of the present invention, which is a high-speed rotation model (for example, 4 × speed) Blu-ray Disc type recorder (or player), A spring 36 is interposed between the holding piece and the inner surface of the recess to engage with the spring projection 34, and the holding piece 30 is strongly pressed against the inner side surface 3 a of the shelf frame 3 by the spring 36. Since the configuration other than the above is substantially the same as that of the embodiment shown in FIGS. 1 to 5, the same parts are denoted by the same reference numerals and the description thereof is omitted.

According to the above configuration, by strengthening the pressing force of the restraining piece 30 against the loader chassis 2 with the spring 36, it is possible to suppress the vibration as desired in response to an increase in vibration accompanying the high-speed rotation of the disk D. .

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 31 Connecting arm 31a Base end portion of connecting arm 31b Central portion of connecting arm 31c Tip portion of connecting arm 31d Connecting rod connecting rod 33 Concave step portion 36 Spring

Claims (4)

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 restraining piece integrally formed via a connecting arm that is elastically displaceable on the inner surface of a recess formed by notching one end of the lever body. The disc device is characterized in that the holding piece is elastically pressed against the loader chassis. A pair of connecting arms formed in an L shape and parallel to each other at a predetermined interval, and a base end portion of the pair of connecting arms is integrally formed on an inner surface of the concave portion and connected to the base end portion Part is extended upward, the tip part connected to the center part is extended to the side and formed integrally with the holding piece, and a connecting rod for integrally connecting the base ends of the pair of connecting arms is provided, 2. The disk device according to claim 1, wherein the base end portions of the pair of connecting arms are formed wider than the center portion and the tip portion. 3. The disk device according to claim 1, wherein a spring is interposed between the holding piece and the inner surface of the recess. The disk device according to claim 1, wherein a concave step portion is formed in the loader chassis so as to face the holding piece in the downward movement state of the traverse chassis.

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