JP2008176876A - Disk apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an unpleasant abnormal sound not to occur during chucking on/off. <P>SOLUTION: An inclined guide surface 26 inclined in an upward outer widening shape is formed on an upper end outer peripheral surface of each elastic strip 24 formed in a clamper main body 15a, and a pusher 27 projecting inward at a lower end inner peripheral surface of each elastic strip 24 is set up protrusively. Each pusher 27 is pushed against a central protrusion 4a of a turntable 4, and this turntable 4 is separated from the clamper 15 by contacting each inclined guide surface 26 to a holder aperture 14a during chucking off and each elastic stripe 24 is carried out elastic displacement to the inward side. An axial center O2 of this clamper 15 is positioned concentrically with an axial center O1 of the turntable 4 by contacting each inclined guide face 26 to the holder aperture 14a in the chucking off state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a disk device (for example, a DVD recorder, a DVD player, etc.), and in particular, prevents unpleasant noise from occurring when chucking is turned on / off.

FIG. 6 to FIG. 11 show an example of a conventional disk device, which is a DVD recorder, FIG. 6 is a longitudinal sectional view thereof, FIG. 7 is a transverse sectional view of the same chucking on state, and FIG. FIG. 9 is a longitudinal sectional view of the main part, FIGS. 10A to 10C are side views of the main part showing the chucking-on procedure, and FIG. It is an enlarged side view of the principal part.

As shown in FIGS. 6 and 7, an optical pickup 3 with an objective lens OL and a turn, which is supported by a loader chassis 2 so that the disk D mounting tray 1 can move forward and backward a and b, and is movable in the radial direction of the disk D. A traverse chassis 6 equipped with a spindle motor 5 with a table 4
The rear part is connected to the loader chassis 2 via a rear elastic member 7 made of rubber so that it can move up and down c and d, and the front part of the traverse chassis 6 is connected to the elevating member 9 via the front elastic member 8 made of rubber. The cam slider 10 is connected to the front portion of the loader chassis 2 so as to be slidable in the left and right directions e and f perpendicular to the forward and backward movements a and b. The cam groove 11a formed in the cam slider 10 and the elevating member 9 The cam slider 10 and the traverse chassis 6 are interlocked and connected via a cam mechanism 11 including a cam pin 11b that is integrally projected to the cam groove 11a and can be engaged with a rack (not shown) integrally formed with the cam slider 10. A pinion 12 is disposed on the front portion of the loader chassis 2 so as to be rotatable forward and backward, and a rack 13 is formed on the lower surface of the tray 1 so as to face the pinion 12. A holder 14a that is concentric with the axis O1 of the turntable 4 extends through a metal plate holder 14 that is installed between both side plates 2a of the loader chassis 2, and a synthetic resin clamper 15 is engaged with the holder hole 14a. Has been.

As shown in FIG. 9, the clamper 15 has a cylindrical clamper main body 15a that is inserted into the holder hole 14a so as to be movable up and down, and an upper flange 15b that is integrally formed at the upper end of the clamper main body 15a. A ring-shaped stopper 16 is disposed on the lower surface of 15a, and the stopper 16
A plurality of upright pieces 16a erected on the upper surface of the upper surface of the upper side of the upper side of the clamper body 16a are inserted into the clamper body 15a. By engaging with the upper end of the main body 15a, the stopper 16 is integrally coupled to the clamper 15. The clamper 15 is regulated by the upper collar 15b and the stopper 16 so that the holder 14 moves up and down within a certain range. It is attached as possible. The clamper body 15
A magnet 18 and a yoke 19 are fitted between a top plate portion 15c of the clamper 15 and a stopper 16 so as to be externally fitted to a cylindrical central projection portion 15d suspended from the top plate portion 15c.

As shown in FIG. 9, a ring-shaped yoke 20 is embedded in the central protrusion 4 a of the turntable 4, and the upper peripheral surface of the central protrusion 4 a is a tapered surface 21 with a narrowed top. In addition,
In FIG. 6, reference numeral 22 denotes a central opening formed in the central portion of the tray 1.

The operation principle will be described. The solid line in FIG. 6 and FIG. 7 show the time of chucking. The cam pin of the cam mechanism 11 is moved by sliding the cam slider 10 in the direction of arrow e by rotating the pinion 12 forward based on the loading signal. 11b is raised along the cam groove 11a, and the traverse chassis 6 is moved upward c via the elevating member 9 so as to be in a horizontal position, so that the central protrusion Da of the turntable 4 is inserted into the central hole Da of the disk D on the tray 1. 4a is inserted, the disk D is lifted by the turntable 4, the disk D is chucked by the turntable 4 and the clamper 15 by the magnetic action of the magnet 18 and the yoke 20 (see FIG. 9), and the spindle motor 5 Rotate the disk D through the turntable 4 at high speed,
Information recorded on the disk D is read by the optical pickup 3.

In this case, as shown in FIG. 9, the inner diameter D2 of the holder hole 14a is set larger than the outer diameter D1 of the clamper body 15a, and a relatively large gap α is formed between the holder hole 14a and the clamper body 15a. Thus, when the disk D is rotated at a high speed, the clamper body 15
A contact accident between a and the holder hole 14a is prevented.

6 and FIG. 8 show the time when chucking is off, and the cam pin 11b of the cam mechanism 11 is lowered along the cam groove 11a by reversing the pinion 12 and sliding the cam slider 10 in the direction of arrow f. The traverse chassis 6 through the elevating member 9
Is moved downward to an inclined posture, so that the turntable 4 is separated from the clamper 15 against the magnetic action of the magnet 18 and the yoke 20, and the tray 1 is advanced through the rack 13 by the reverse operation of the pinion 12. a. In addition, there exists what was described in patent document 1 as a related technique.
JP 2002-184064 A

In the above conventional configuration, when chucking is on, as shown in FIG. 9, a relatively large gap α is formed between the clamper body 15a of the clamper 15 and the holder hole 14a. As shown, the clamper 15 is offset in the holder hole 14a, and the axis O2 of the holder 14 may be offset from the axis O1 of the turntable 4 by an interval β corresponding to the offset. When the turntable 4 is lifted without the disk D being placed on the disk 4, as shown in FIG. 10 (b), the clamper 15 is pushed up by the central protrusion 4a of the turntable 4 while being tilted. It is done. Therefore, due to the magnetic action of the magnet 18 and the yoke 20, the clamper 15 slides sideways in the direction of the arrow g on the central projection 4a and is fitted concentrically to the turntable 4 (see FIG. 10C). An abnormal noise is generated when sliding and mating, causing discomfort to the user.

Further, by sliding the cam slider 10 in the arrow f direction at the time of chucking off, the cam pin 11b is pushed down by the upper surface 11A of the cam groove 11a as shown by the solid line in FIG. Against this, the turntable 4 is forcibly separated from the clamper 15, and the cam pin 11 b is separated by the forcible separation.
Falls at a dash and collides with the lower surface 11B of the cam groove 11a (see the phantom line in FIG. 11), and an abnormal noise is generated to give the user an unpleasant feeling.

An object of the present invention is to provide a disk device in which unpleasant noise is not generated when chucking is turned on / off.

In order to achieve the above object, according to the first aspect of the present invention, the disk mounting tray is supported by the loader chassis so as to be able to move forward and backward, and the rear part of the traverse chassis on which the optical pickup and the turntable are mounted moves up and down on the loader chassis. A cam slider connected to the front portion of the traverse chassis via a cam mechanism is slidably disposed on the loader chassis, and a holder concentric with the turntable is mounted on a holder constructed between both side plates of the loader chassis. There is provided a synthetic resin clamper having a cylindrical clamper body that is inserted through the hole so as to be movable up and down, and an upper collar portion that is integrally formed at the upper end of the clamper body. One of them has a magnet, and the other has a yoke. When the king is on, slide the cam slider in one direction to move the traverse chassis up through the cam mechanism, insert the central protrusion of the turntable into the center hole of the disc on the tray, and lift the disc by the turntable Chucking with the clamper, the disk is rotated at high speed by the turntable,
The information recorded on the disk is read by an optical pickup, and when the chucking is off, the traverse chassis is moved downward via the cam mechanism by sliding the cam slider in the other direction, so that the turntable is separated from the clamper. In the disk device, a pair of slits are formed at a plurality of locations at predetermined intervals in the circumferential direction of the clamper body, whereby elastic pieces that can be elastically displaced are left between the slits at the respective locations, A stopper projecting outward is integrally provided on the outer peripheral surface of the lower end of the piece, and each stopper is opposed to the lower surface of the holder in a state in which each stopper is pushed inward and the clamper body is fitted into the holder hole. In addition, an inclined guide surface is formed on the outer peripheral surface of the upper end portion of each elastic piece so as to incline upward and outward. A pusher that protrudes inward is integrally provided on the inner peripheral surface of the lower end portion of each elastic piece, and each elastic piece is elastically displaced inward by bringing each inclined guide surface into contact with the holder hole at the time of chucking off. By pressing each pusher against the central protrusion of the turntable to separate the turntable from the clamper and bringing the inclined guide surfaces into contact with the holder holes in the chucking-off state, the axis of the clamper is It is characterized by being positioned concentrically with the axis of the turntable.

According to a second aspect of the present invention, the disk mounting tray is supported by the loader chassis so as to be able to move forward and backward, and the rear part of the traverse chassis on which the optical pickup and the turntable are mounted is connected to the loader chassis so as to be movable up and down. A cam slider connected to the front portion of the chassis via a cam mechanism is slidably arranged on the loader chassis, and a holder hole concentric with the turntable is formed in a holder laid between both side plates of the loader chassis,
A synthetic resin clamper having a cylindrical clamper body that can be moved up and down in the holder hole and an upper collar unit formed integrally with the upper end of the clamper body is provided, and one of the clamper and the turntable has a magnet. And a yoke on the other side,
When chucking is turned on, the traverse chassis is moved upward via the cam mechanism by sliding the cam slider in one direction, and the central protrusion of the turntable is inserted into the center hole of the disk on the tray, and the disk is lifted by the turntable. Chucking with the clamper, rotating the disk at high speed with the turntable, reading the information recorded on the disk with an optical pickup, and sliding the cam slider in the other direction at the time of chucking off via the cam mechanism In the disk device in which the traverse chassis is moved downward and the turntable is separated from the clamper, an inclined guide surface is formed on the outer peripheral surface of the upper end portion of the clamper body so as to incline outwardly and is chucked. In the off state, the inclined shape By contacting the id surface in the holder hole, it is characterized in that the axis of the clamper is positioned in the axis and concentric turntables.

According to a third aspect of the present invention, in the second aspect of the present invention, a pair of slits are formed at a plurality of locations at predetermined intervals in the circumferential direction of the clamper body, so that the gaps between the respective slits are formed. An elastic piece that can be elastically displaced is left uncut, and an inclined guide surface that is inclined outwardly and outwardly is formed on the outer peripheral surface of the upper end portion of each elastic piece, and inward on the inner peripheral surface of the lower end portion of each elastic piece. The pushers that protrude from the center of the turntable are integrally projected, and each pusher is pressed against the central projection of the turntable by bringing the inclined guide surface into contact with the holder hole and elastically displacing each elastic piece inward during chucking off. The turntable is separated from the clamper.

According to a fourth aspect of the present invention, in the invention of the second or third aspect, a stopper projecting outward is integrally provided on the outer peripheral surface of the lower end portion of each elastic piece, and the respective stoppers are provided on the inner side. Each stopper is opposed to the lower surface of the holder in a state where the clamper body is inserted into the holder hole.

The invention according to claim 1 corresponds to one embodiment (see FIGS. 1 to 5), and according to this, in the chucking-off state, the inclined guide surface of the clamper body is used as the holder hole. By making contact, the clamper's axis is positioned concentrically with the turntable's axis, so that even when no disk is placed on the turntable when chucking is on, It can be lifted straight. For this reason,
The chucking operation can be performed silently without causing the clamper to skid and causing an unpleasant noise.

Further, when chucking off, when the traverse chassis is moved downward by the cam mechanism and the turntable is separated from the clamper, the inclined guide surface of each elastic piece is brought into contact with the holder hole so that each elastic piece is inward. Elastically displaced, the pusher of each elastic piece is pressed against the central projection of the turntable to separate the turntable from the clamper,
With the joint action of each pusher and cam mechanism, against the magnetic action of the magnet and the yoke,
The turntable can be smoothly and quietly separated from the clamper, and an unpleasant noise is not generated as in the case where the turntable is separated only by the conventional cam mechanism.

Furthermore, the stopper is integrally projected on the outer peripheral surface of the lower end portion of each elastic piece of the clamper, and its number of parts is halved compared to the case where the stopper is separated from the clamper as in the past. Production costs can be reduced by the halved amount.

The invention according to claim 2 corresponds to the basic form. According to this, in the chucking-off state, the inclined guide surface of the clamper main body is brought into contact with the holder hole so that the axis of the clamper is aligned. Since it is positioned concentrically with the axis of the turntable, the clamper can be lifted straight by the turntable even when no disk is placed on the turntable when chucking is on. For this reason, the chucking operation can be performed silently without causing the clamper to skid and causing an unpleasant noise.

According to the third aspect of the present invention, when the traverse chassis is moved downward by the cam mechanism to separate the turntable from the clamper at the time of chucking off, the inclined guide surface of each elastic piece is brought into contact with the holder hole. The elastic pieces are elastically displaced inward, and the pushers of the elastic pieces are pressed against the central projection of the turntable to separate the turntable from the clamper. With the joint action, the turntable can be smoothly and quietly separated from the clamper against the magnetic action of the magnet and yoke, and unpleasant noise can be generated as in the case of separating only with the conventional cam mechanism. It does not occur.

According to the invention described in claim 4, the stopper is integrally projected on the outer peripheral surface of the lower end of each elastic piece of the clamper, compared to the case where the stopper is separated from the clamper as in the prior art. Since the number of parts is halved, the production cost can be reduced by the halved amount.

1 to 5 show a disk apparatus according to an embodiment of the present invention.
FIG. 1 is a longitudinal sectional view of a main part in the chucking-on state, and FIG.
-A view, FIG. 3 is an exploded perspective view of the main part, FIGS. 4 (a) and 4 (b) are longitudinal sectional views of the main part showing the chucking-on procedure, and FIG. 5 (a) is the chucking. Longitudinal sectional view of the main part showing the off state,
FIG. 5B is an enlarged longitudinal sectional view of the main part.

As shown in FIGS. 1 to 3, a pair of slits 23 are formed at a plurality of locations (three locations in this embodiment) at predetermined intervals in the circumferential direction of the clamper main body 15 a, so that the slits at the respective locations are formed. The elastic pieces 24 that are elastically displaceable between the elastic pieces 24 are left uncut, and a substantially triangular stopper 16 that protrudes outward is integrally provided on the outer peripheral surface of the lower end portion of each elastic piece 24. The upper surface 16c (see FIG. 5B) of each stopper 16 is opposed to the lower surface of the holder 14 by inserting the clamper body 15a into the holder hole 14a.

According to the above configuration, the stopper 16 is integrally protruded from the outer peripheral surface of the lower end portion of each elastic piece 24 of the clamper 15, and the stopper 16 is separated from the clamper 15 as in the prior art (see FIG. 9). Since the number of parts is halved compared to, the manufacturing cost can be reduced by the halved amount.

As shown in FIGS. 1 to 5, by bending the upper end 24 a of each elastic piece 24 into a substantially square shape, an inclined guide surface 26 that is inclined outwardly and outwardly is formed on the outer peripheral surface of the upper end. In the chucking-off state shown in FIG. 4A, the inclined guide surface 26 is moved to the holder hole 14a.
The axial center O2 of the clamper 15 is positioned concentrically with the axial center O1 of the turntable 4. Therefore, as shown in FIG. 4B, when chucking is on,
Even when the disk D is not placed on the turntable 4, the clamper 15 can be lifted straight by the turntable 4. For this reason, the clamper 15 does not slide and does not generate unpleasant noise as in the conventional case (see FIG. 10B), and the chucking operation can be performed quietly.

As shown in FIG. 5A, a substantially triangular pusher 27 projecting inward is integrally formed on the inner peripheral surface of the lower end portion of each elastic piece 24. When the chucking is off, the cam mechanism 11 causes the traverse chassis. 6 is moved down d to lower the turntable 4 so that the clamper 1
5 is brought into contact with the holder hole 14a to elastically displace the elastic pieces 24 inward (see the phantom line in FIG. 5 (b)), whereby each pusher 27 is moved to the central protrusion of the turntable 4. The turn table 4 is pressed downward by pressing against the tapered surface 21 of the portion 4a, and according to this, the magnet 18 and the yoke are jointly operated by the pushers 27 and the cam mechanism 11. When the turntable 4 can be separated from the clamper 15 smoothly and quietly against the magnetic action with the conventional cam mechanism 11 (FIG. 1).
No unpleasant noise is generated as in 1).

In FIG. 1 and FIG. 2, reference numeral 29 denotes a plurality of hooks integrally projecting from the top plate portion 15c of the clamper 15, and locks the magnet 18 and the yoke 19 to the top plate portion 15c. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 6 to 11, the same parts are denoted by the same reference numerals and the description thereof is omitted.

It is a longitudinal cross-sectional view of the principal part in the chucking-on state in the disc apparatus which is one embodiment of the present invention. It is an AA arrow line view of FIG. It is a disassembled perspective view of the principal part. (A) and (b) are the longitudinal cross-sectional views of the principal part which show the chucking-on procedure. (A) is the longitudinal cross-sectional view of the principal part of the same chucking-off state, (b) is the expanded longitudinal cross-sectional view of the principal part. It is a longitudinal cross-sectional view which shows a prior art example. It is a cross-sectional view of the same chucking-on state. It is a cross-sectional view of the same chucking-off state. It is a longitudinal cross-sectional view of the principal part. (A)-(c) is a side view of the principal part which shows the same chucking-on procedure. It is an enlarged side view of the other principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tray 2 Loader chassis 3 Optical pick-up 4 Turntable 4a Center protrusion part of a turntable 6 Traverse chassis 10 Cam slider 11 Cam mechanism 14 Holder 14a Holder hole 15 Clamper 16 Stopper 18 Magnet 20 Yoke 23 Slit 24 Elastic piece 26 Inclined guide surface 27 Pusher D disc Da disc center hole O1 axis of turntable O2 axis of clamper

Claims (4)

The disc loading tray is supported by the loader chassis so as to be able to move forward and backward, and the rear part of the traverse chassis on which the optical pickup and the turntable are mounted is connected to the loader chassis so as to be movable up and down. And a cam slider that is slidably disposed on the loader chassis, a holder hole that is concentric with the turntable is provided in a holder that is laid between both side plates of the loader chassis, and a cylinder that fits into the holder hole so as to be movable up and down. A synthetic resin clamper having a cylindrical clamper body and an upper collar integrally formed at the upper end of the clamper body, a magnet is provided on one of the clamper and the turntable, and a yoke is provided on the other side. The cam slider slides in one direction when chucking is on. The traverse chassis is moved upward via the cam mechanism, the center projection of the turntable is inserted into the center hole of the disc on the tray, the disc is lifted by the turntable, and chucked with the clamper. Rotate the disc at high speed, read the information recorded on the disc with an optical pickup, and when the chucking is off, slide the cam slider in the other direction to lower the traverse chassis via the cam mechanism, In the disk device separated from the clamper, a pair of slits are formed at a plurality of positions at predetermined intervals in the circumferential direction of the clamper body, whereby elastic pieces that can be elastically displaced are formed between the slits at the respective positions. The lower end outer peripheral surface of each elastic piece that is left uncut Stoppers that protrude outward are integrally projected, and the stoppers are opposed to the lower surface of the holder in a state where the stoppers are pushed inward to fit the clamper body into the holder holes, and the upper ends of the elastic pieces An inclined guide surface that is inclined outwardly and outwardly is formed on the outer peripheral surface of the portion, and a pusher that protrudes inward is integrally provided on the inner peripheral surface of the lower end portion of each elastic piece. Each pusher is pressed against the central protrusion of the turntable to bring the turntable away from the clamper by bringing the inclined guide surface into contact with the holder hole and elastically displacing each elastic piece inward. By contacting each inclined guide surface with the holder hole, the axis of the clamper is positioned concentrically with the axis of the turntable. A disk unit. The disc loading tray is supported by the loader chassis so as to be able to move forward and backward, and the rear part of the traverse chassis on which the optical pickup and the turntable are mounted is connected to the loader chassis so as to be movable up and down. And a cam slider that is slidably disposed on the loader chassis, a holder hole that is concentric with the turntable is provided in a holder that is laid between both side plates of the loader chassis, and a cylinder that fits into the holder hole so as to be movable up and down. A synthetic resin clamper having a cylindrical clamper body and an upper collar integrally formed at the upper end of the clamper body, a magnet is provided on one of the clamper and the turntable, and a yoke is provided on the other side. The cam slider slides in one direction when chucking is on. The traverse chassis is moved upward via the cam mechanism, the center projection of the turntable is inserted into the center hole of the disc on the tray, the disc is lifted by the turntable, and chucked with the clamper. Rotate the disc at high speed, read the information recorded on the disc with an optical pickup, and when the chucking is off, slide the cam slider in the other direction to lower the traverse chassis via the cam mechanism, In the disk device separated from the clamper, an inclined guide surface that is inclined outwardly and outwardly is formed on the outer peripheral surface of the upper end portion of the clamper body, and the inclined guide surface is held in a chucking-off state. By contacting the hole, the clamper Disk apparatus characterized by axis is positioned on the axis and concentric turntables. By forming a pair of slits at a plurality of locations at predetermined intervals in the circumferential direction of the clamper body, elastic pieces that can be elastically displaced are left between the slits at the respective locations, and the upper ends of the elastic pieces An inclined guide surface that is inclined outwardly and outwardly is formed on the outer peripheral surface,
A pusher protruding inwardly is integrally provided on the inner peripheral surface of the lower end of each elastic piece, and the elastic piece is elastically displaced inward by bringing the inclined guide surface into contact with the holder hole at the time of chucking off. 3. The disk apparatus according to claim 2, wherein each pusher is pressed against a central protrusion of the turntable to separate the turntable from the clamper. A stopper that protrudes outward is integrally provided on the outer peripheral surface of the lower end of each elastic piece, and in the state that the stopper is pushed inward and the clamper body is fitted into the holder hole, The disk device according to claim 2, wherein the disk device faces the lower surface.

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