JP2006202407A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of reducing noise when the disk is held with a comparatively easier configuration than heretofore. <P>SOLUTION: The device is the optical disk device 10 which is provided with a clamp mechanism in which a plurality of chuck pawls supported rotatably in a turntable perform holding/releasing of the disk by elevation of an elevation member, a rotatable elevation lever for lowering the elevation member, a coupling plate arranged rotatably making a center of the turntable as a rotation center and coupled to the elevation gear through a gear part, and an energizing spring engaged with the coupling plate, in which a tip part of the elevation lever is wedged between the turntable and the elevation member by rotation of the coupling plate, by lowering the elevation plate, holding/releasing of the disk is performed, the coupling plate is energized by the energizing spring so that the coupling plate is rotated in the direction of holding the disk. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus such as a CD (Compact Disc) and a DVD (Digital Versatile Disc), and more particularly to an optical disc apparatus in which a center hole of an optical disc is held on a turntable.

2. Description of the Related Art Conventionally, as an optical disk apparatus for recording / reproducing a disk, an apparatus that attaches / detaches a disk to / from a turntable manually or by an attaching / detaching mechanism is known (for example, see Patent Document 1).
As shown in FIGS. 13 and 14, the turntable 102 that rotates while holding the disc 101 in the optical disc apparatus 100 has an overall disc shape having a circular stepped portion 102 a in which the center hole of the disc 101 fits in the center. ing. The turntable 102 is configured to rotate integrally with the rotation center shaft 103a of the rotation driving means 103, and the elevating member 104 is externally fitted to the cylindrical portion 105 at the center of the turntable 102 and slid in the vertical direction. It is installed movably.

  Further, a spring 1007 is provided between the elevating member 104 and the rotation upper surface 106 of the rotation driving means 103, and always urges the elevating member 104 upward. Action members 108a and 108b are provided outside the elevating member 104 so as to be able to approach and separate from the rotation center shaft 103a. As shown in FIG. 13, the action members 1008a and 108b are connected to the elevating member 104 and the turntable 102. The lifting member 104 is configured to move downward against the urging force of the spring 107.

  Further, the stepped portion 102a of the turntable 102 has a plurality of chuck claw mounting holes 102b in the circumferential direction, and a chuck claw 109 for gripping the center hole of the disk 101 is provided in the chuck claw mounting hole 102b. Is provided. These chuck claws 109 are provided with a rotating shaft 111 on the base end side thereof, and are rotated in the vertical direction (in the directions of arrows X1 and X2 in FIGS. 13 and 14) by being supported by the turntable 102. . The pressing engagement portions 112 of the chuck claws 109 are in contact with the pressing portions 113 formed uniformly on the elevating member 104, respectively.

Accordingly, as shown in FIG. 13, when the lifting member 104 is released by the action members 108 a and 108 b and moved upward by the spring 107, the pressing engagement portion 112 of the chuck claw 109 is moved to the lifting member 104. It is pushed up by the pressing part 113 and rotates in the direction of arrow X1 in FIG. 13 with the rotating shaft part 111 as a fulcrum. As a result, the chuck claw 109 is protruded from the chuck claw mounting hole 102b, and the disc 101 is held between the turntable 102 and the surface on which the disc is placed, as shown in FIG. A storage projection 114 is provided adjacent to the pressing portion 113 for locking the chuck claw 109 by the lowering of the elevating member 104 and drawing it into the chuck claw mounting hole 102b.
Japanese Patent Laid-Open No. 2002-352496 (page 7, FIG. 3)

  However, in the conventional optical disc apparatus 100, when the pressing by the action members 108a and 108b against the lifting member 104 is released, the action members 108a and 108b are formed between the lifting member 104 and the action members 108a and 108b by the biasing force of the spring 107. Since it is configured to operate at the moment when a driving force exceeding the frictional force is generated, a sudden load fluctuation occurs in the elevating member 104, and the urging force of the spring 107 is directly received to move upward. The plurality of chuck claws 109 rotated by the abrupt contact with the disk 101 abruptly. For this reason, when the disk is held, a collision sound by the chuck claw 109 and the disk 101 can be generated.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide an optical disc apparatus capable of reducing noise when holding a disc with a simple configuration.

  An optical disk apparatus according to the present invention includes a clamp mechanism in which a plurality of chuck claws rotatably supported in a turntable by holding up and down of a lifting member, and a rotatable mechanism for lowering the lifting member. An elevating lever, a connecting plate that is arranged to be rotatable about the same axis as the center of the turntable, and that is connected to the elevating lever via a gear portion; and a biasing spring that engages with the connecting plate, The optical disk apparatus is configured to release the holding of the disk by interrupting the tip of the lifting lever between the turntable and the lifting member by rotating a connecting plate and lowering the lifting plate, The biasing spring is configured to bias the connecting plate in a direction in which the connecting plate rotates in the disc holding direction.

  With this configuration, when playing back recorded information while holding the disc, the recording surface of the disc is placed on the disc mounting portion of the turntable, and the protruding portion passes through the hollow portion of the disc to the label side. The chuck pawl is taken out from the protruding portion to hold the disc. At this time, the elevating lever is rotated, and the elevating member releases the pressing by the elevating lever, so that the elevating member is raised by the urging force of the disk holding spring and the chuck claw is rotated to grip the disk. The connecting plate that rotates is always urged by the urging spring in the direction in which the connecting plate rotates in the disc holding direction. For this reason, sudden load fluctuations due to the contact friction force between the elevating member and the elevating lever can be suppressed, and the elevating member rises smoothly in conjunction with the operation of the elevating lever. Contact can be avoided. As a result, noise during holding of the disk can be reduced.

Also, the optical disc apparatus of the present invention has a configuration in which the connecting plate and the pair of lift levers are engaged via a gear portion.
With this configuration, since the connecting plate and the pair of lift levers are engaged via the gear portion, it is possible to prevent a timing shift in which the lift lever operates.

Furthermore, the optical disc apparatus of the present invention has a configuration in which a taper is formed at the tip of the elevating lever that contacts the elevating member, and the elevating member rises while sliding on the taper.
With this configuration, the elevating member is smoothly raised along the taper at the end of the elevating lever while interlocking with the operation of the elevating lever, and sudden load fluctuations are suppressed by the contact friction force between the elevating member and the elevating lever. Is done.

  According to the present invention, the contact between the chuck claw and the disk is caused by urging the connection plate that rotates the elevating lever so that the connection plate always rotates in the direction of rotating the disk in the disk holding direction. Since this can be avoided, it is possible to provide an optical disc apparatus having an effect that noise during holding of the disc can be reduced.

Hereinafter, an optical disk device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an optical disk device according to a first embodiment of the present invention.
FIG. 1 shows an overall perspective view of a car audio device 1 incorporating an optical disk device 10 according to an embodiment of the present invention. The car audio device 1 includes a radio 2, a cassette tape player 3 and the like in addition to the optical disc device 10, and a front panel 4 includes a display unit 4a shared by all functions and a power / volume knob 4b. In addition, a disk insertion / removal port 11 having a lid 11a that can be freely opened and closed in the optical disk device 10, a tuning knob 2a for radio, a cassette tape insertion port 3a, and the like are provided. In addition, a control unit for controlling the radio 2, the cassette tape reproducing device 3, the optical disk device 10 and the like is provided inside.

2 and 3 show a cross-sectional view of the optical disc apparatus 10 according to the embodiment of the present invention built in the car audio apparatus 1 at the position II-II in FIG.
As shown in FIGS. 2 and 3, the optical disk apparatus 10 includes a rectangular box-shaped main body 13, a plurality of trays 14 for stacking and storing the disks 12 in the main body 13, and a predetermined height in the main body 13. A tray opening / closing means (not shown) provided on a base 15 fixed at a position for opening and closing between predetermined trays 14 and a shaft 16 provided on the base 15 can be rotated in a direction indicated by an arrow A. And a performance unit 20 supported by the player.

  The performance section 20 has a flat performance chassis (hereinafter referred to as “suspension chassis”) 21 that rotates about a shaft 16, and the suspension chassis 21 rotates while holding the disk 12. A clamp mechanism 30 is provided. The suspension chassis 21 has a pickup 22 supported so as to reciprocate along the suspension chassis 21 and a drive motor 23 that moves the pickup 22 so as to access the rotating disk 12 held by the clamp mechanism 30. And a lead screw 23a. A substantially Y-shaped cam groove 24 is formed in the vicinity of the shaft 16 of the suspension chassis 21, and a rotational drive shaft 26 implanted in the rotational lever 25 is engaged therewith.

Next, the clamp mechanism 30 will be described in detail with reference to FIGS.
The clamp mechanism 30 has a turntable 31 that is provided at the tip of the suspension chassis 21 and rotates while holding the disk 12, and a mounting portion 32 on which the recording surface 12a (see FIG. 7) of the disk 12 can be mounted; A substantially cylindrical protruding portion 33 that can pass from the mounting portion 32 through the hollow portion 12c (see FIG. 2) of the disc 12 and protrude toward the label surface 12b (see FIG. 7) of the disc 12, and the protruding portion. By rotating about the support shaft 34 along the tangential direction of 33 as a fulcrum, it engages with the label surface 12b from chuck claw mounting windows 37 at a plurality of locations (here, for example, 3 locations) on the peripheral surface of the projection 33. A plurality of chuck claws 35 that can be projected and retracted, and a pressing portion 36 provided with a pressing portion 36a (see FIG. 8) that presses the proximal end portion 35a of each chuck claw 35 by moving along the axis of the protruding portion 33. ( It has a 10 reference) and.

  As shown in FIGS. 5 and 7, an elevating member 40 slidably installed in a direction perpendicular to the mounting portion 32 (up and down direction in the drawing) is externally fitted to the cylindrical portion 38 of the turntable 31. A clamp spring 43 for biasing the elevating member 40 upward is provided between the elevating member 40 and the upper surface 39b of the rotary motor 39. Lift levers 45L and 45R for lowering the lifting member 40 against the biasing force of the spring 43 are provided between the turntable 31 and the lifting member 40 so as to be insertable. A pair of lift levers 45L and 45R are provided at positions facing each other across the turntable 31 at the front end of the suspension chassis 21, and each of the lift levers 45L and 45R is rotatably provided on the suspension chassis 21 with the rotation center 46 as a central axis. Yes. The tips of the lift levers 45L and 45R are provided with a taper 45a. The taper 45a is formed between the turntable 31 and the lift member 40 when the lift levers 45L and 45R rotate about the rotation center 46 as a central axis. The elevating member 40 is lowered by being inserted therebetween.

A connecting plate 47 that connects the left and right lifting levers 45L and 45R is provided on the lower surface of the front end portion of the suspension chassis 21 so as to be rotatable about the same axis as the center of the turntable 31. Portions 47L and 47R are provided. The gear portions 47L and 47R are engaged with gear portions 48L and 48R provided on the lower outer peripheral surfaces of the left and right lifting levers 45L and 45R, respectively.
On the other hand, a drive lever 49 is provided on the upper surface of the suspension chassis 21 so as to be movable in the longitudinal direction, and a cam groove 49a (FIGS. 4, 5, 7, and 11 is provided at the tip of the turntable 31 direction side. Reference) is provided, and is movably fitted to a drive shaft 47 a provided on the connecting plate 47.
Further, a substantially T-shaped cam groove 49 b (see FIGS. 4 and 11) is formed at the other end, and the rotation drive shaft 26 implanted in the rotation lever 25 is substantially omitted on the suspension chassis 21. The Y-shaped cam groove 24 is engaged.

  As shown in FIGS. 6 and 8, a cylindrical portion 38 is provided in the center of the turntable 31 in the direction of the rotation center, and a central axis through hole 38a is provided in the cylindrical portion 38 so as to penetrate therethrough. Yes. A rotation shaft 39a of a rotation motor 39 as rotation drive means is fitted into the central shaft through hole 38a, and the turntable 31 is driven to rotate by the rotation motor 39.

  In addition, an elevating member 40 slidably installed in a direction perpendicular to the mounting portion 32 (up and down direction in the drawing) is externally fitted to the cylindrical portion 38 of the turntable 31, and rotates with the elevating member 40. Between the upper surface 39 b of the motor 39, a clamp spring 43 that biases the elevating member 40 upward is provided. Chuck claw mounting windows 37 are provided on the side surface of the projecting portion 33 of the turntable 31 at equal intervals in the circumferential direction (for example, a central angle of 120 degrees).

  As shown in FIG. 9, a support shaft 34 is provided in the lower portion of the chuck claw 35, and a base end portion 35 a protruding downward is provided in the vicinity of the support shaft 34. A stepped groove 35 b is formed in the center of the chuck claw 35.

  As shown in FIGS. 5 and 10, the elevating member 40 is integrally formed with a cylindrical portion 41 having a double wall structure including an inner wall 41a and an outer wall 41b at the center, and a turn portion is formed inside the inner wall 41a. A through-hole portion 42 that fits around the cylindrical portion 38 of the table 31 is formed. Further, a holding groove 41c for holding the clamp spring 43 is formed between the inner wall 41a and the outer wall 41b. The outermost periphery of the cylindrical portion 41 has a locking portion 44a at the tip and is provided at the lower end. A storage projection 44 having a bent portion 44b (see FIG. 10) is provided corresponding to the installation location of the chuck claw 35. The locking portion 44a of the storage projection 44 locks the stepped groove portion 35b of the chuck claw 35 when the elevating member 40 is lowered, and rotates the chuck claw 35 around the support shaft 34 so as to hold the chuck claw mounting window 37. It is designed to be pulled inside.

  As shown in FIG. 10, in the vicinity of the left and right sides of the storage protrusion 44, the base end portion 35 a of the chuck claw 35 is pressed as the elevating member 40 is raised, and the chuck claw 35 is rotated around the support shaft 34. A pressing portion 36 for projecting the chuck claw 35 from the chuck claw mounting window 37 is provided.

  Further, a groove 47b that engages with the operating end 51a of the biasing spring 50 is formed at one end of the connecting plate 47, and as shown in FIG. 7C, what is the operating end 51a of the biasing spring 50? The opposite fixed end 51 b is engaged with a through hole of the wall portion 21 a formed integrally with the suspension chassis 21. Thereby, the elastic force of the urging spring 50 acts, and the connecting plate 47 is always urged clockwise.

  As shown in FIG. 11, the drive lever 49 is formed of a long member along the longitudinal direction of the suspension chassis 21 (left-right direction in FIG. 4), and a cam groove 49a is formed at one end on the turntable 31 direction side. A substantially T-shaped cam groove 49b is formed at the end. As shown in FIG. 4, the drive shaft 47a of the connecting plate 47 is engaged in the cam groove 49a. The connecting plate 47 is configured to be rotatable in the clockwise direction in FIG. 4 via a drive shaft 47 a engaged with the cam groove 49 a of the drive lever 49.

  On the other hand, the cam groove 49 b of the drive lever 49 is engaged with the rotation drive shaft 26 planted in the rotation lever 25. The rotational drive shaft 26 is simultaneously engaged with a cam groove 24 formed on the suspension chassis 21. That is, the rotation drive shaft 26 is inserted into the substantially T-shaped cam groove 49b and the substantially Y-shaped cam groove 24 of the members stacked in this order from the lower side, the rotation lever 25, the drive lever 49, and the suspension chassis 21. It is penetrated from below and engaged.

  With such an engagement structure, the turning lever 25 enables both the swing of the suspension chassis 21 and the movement of the driving lever 49 in the direction P in FIG. 4 via the turning drive shaft 26. . That is, when the turning lever 25 is turned, the cam groove portion 24 is first pressed through the turning drive shaft 26 and the suspension chassis 21 is swung. When the swing of the performance unit 20 is completed, the rotating drive shaft 26 that is further rotated this time moves in the cam groove portion 24a formed in the long groove of the cam groove 24, and maintains the posture of the suspension chassis 21, The cam groove 49b is pressed to move the drive lever 49 in the center direction of the disk 12 (P direction in FIG. 4). As described above, the series of operations of the rotation lever 25 enables the transition from the rotation operation of the suspension chassis 21 to the disk holding operation to be performed with good timing.

  As shown in FIG. 12, the substantially Y-shaped cam groove 24 described above is formed in the vicinity of the shaft 16 of the suspension chassis 21, and the cam groove 24 is formed as one of two Y-shaped short grooves. The other is formed in a long groove (cam groove portion 24a). The cam groove 24 moves the rotation drive shaft 26 of the rotation lever 25 along the cam groove portion 24a, so that the posture of the suspension chassis 21 in which the swing is completed is maintained and the drive lever 49 in FIG. Movement in the middle P direction is possible.

The reproduction operation of the disk 12 in the optical disk apparatus 10 configured as described above will be described.
First, a predetermined tray 14 is opened by the tray opening means. Next, the rotation lever 25 is rotated in the direction of arrow A in FIG. 2 by a drive source (not shown), whereby the suspension chassis 21 is moved by the cam groove 24 and the rotation drive shaft 26 formed on the suspension chassis 21. From the standby position shown in FIG. 2 to the reproduction position shown in FIG.

  Thereby, the suspension chassis 21 is inserted between the predetermined trays 14. Further, when the drive lever 49 is moved toward the center of the disk, a reproducible state as shown in FIG. 3 is obtained, and the disk 12 is held by the clamp mechanism 30. Information recorded on the disk 12 is reproduced while rotating the disk 12 and moving the pickup 22 along the suspension chassis 21.

  Here, the plurality of chuck claws 35 are stored inside the chuck claw mounting window 37 before the disk 12 is mounted on the turntable 31. When the disk 12 is mounted on the mounting portion 32 of the turntable 31 in this state, the rotating lever 25 is further rotated by a driving manual operation (not shown). Then, the drive lever 49 starts to move in the center direction of the disk 12 (P direction in FIG. 4) by the cam groove 49b formed in the rotation drive shaft 26 and the drive lever 49.

  At this time, in the cam groove 24 on the suspension chassis 21, the rotation drive shaft 26 passes through the cam groove portion 24 a (see FIG. 12) formed on the track of the rotation lever 25. Does not move while maintaining its posture, and only the drive lever 49 necessary for the disk holding operation can be moved, and the rotation of the suspension chassis 21 and the disk holding operation are performed by a series of operations of the rotation lever 25. be able to.

  As a result, the drive shaft 47a of the connecting plate 47 comes into contact with the end face of the cam groove 49a of the driving lever 49 and rotates the connecting plate 47 in the clockwise direction so that the gear portions 47L, 47R of the connecting plate 47 and the lifting lever 45L, Power is transmitted by the gear portions 48L and 48R of the 45R, and both the lift levers 45L and 45R are rotated in a direction away from the center of the turntable 31 (the direction of arrow S in FIG. 5A). As a result, the lift levers 45L and 45R are separated from the turntable 31 and the lift member 40, and the lift member 40 is lifted by the biasing force of the spring 43.

  At this time, as shown in FIG. 6, as the elevating member 40 is raised, the pressing portion 36 a (see FIG. 8) of the pressing portion 36 (see FIG. 10) comes into contact with the base end portions 35 a of the plurality of chuck claws 35. Thus, the plurality of chuck claws 35 can rotate about the support shaft 34 in the direction of the arrow X1 in FIG. 6 and protrude from the chuck claw mounting window 37 to grip the disk 12 (see FIG. 8).

Here, since the connecting plate 47 for rotating the elevating levers 45L and 45R is always urged in advance by the urging spring 50 in the direction in which the connecting plate 47 rotates clockwise, the elevating member 40 is moved up and down by the elevating lever 45L. , 45R, and rises smoothly along the taper 45a at the tip. Then, sudden load fluctuations due to generation of driving force exceeding the contact friction force between the elevating member 40 and the elevating levers 45L and 45R can be suppressed, and sudden contact between the chuck claw 35 and the disk 12 can be avoided. The noise at the time of holding 12 can be reduced.
Further, since the connecting plate 47 is always biased in advance by the biasing spring 50 in the clockwise rotation direction, the clearance between the related members related to a series of disc gripping operations is absorbed. Therefore, the influence of the clearance of the related members is eliminated, and the influence on the contact between the chuck claw 35 and the disk 12 which is the final operation of the series of disk gripping operations is not generated as noise.

  On the other hand, when the disc 12 is released from the disc holding state shown in FIGS. 7 and 8, the turning lever 25 starts to turn in the direction of arrow A in FIG. Thereby, first, the drive lever 49 is moved away from the turntable 31 (Q direction in FIG. 4) by the cam groove 49b and the rotation drive shaft 26 shown in FIG. 4 formed on the drive lever 49. As a result, the connecting groove 47 rotates counterclockwise in FIG. 7A by the action of the cam groove 49 a provided at the tip of the driving lever 49 and the driving shaft 47 a of the connecting plate 47, and the gear portion of the connecting plate 47. The lifting levers 45L and 45R are rotated toward the center direction of the turntable 31 (in the direction of arrow R in FIG. 7A) via the gear portions 45L and 45R of the lifting lever 45 and 47L and 47R, respectively.

  By this rotation operation, the lift levers 45L and 45R interrupt between the lift member 40 and the turntable 31, and move the lift member 40 toward the rotary motor 39 (downward in FIG. 8) against the urging force of the spring 43. At this time, the pressing portion 36 a of the elevating member 40 is separated from the base end portion 35 a of the chuck claw 35, and the stepped groove portion in which the engaging portion 44 a of the storage projection 44 of the elevating member 40 is provided on the back surface of the chuck claw 35. In order to engage with 35b, the chuck claw 35 rotates in the direction of arrow X2 in FIG. 8 with the support shaft 34 as a rotation fulcrum. As a result, the chuck claw 35 is housed inside the chuck claw mounting window 37 and the holding of the disk 12 is released. Further, as the rotation lever 49 continues to rotate, the suspension chassis 21 can be rotated by the cam groove 49b formed on the suspension chassis 21 to return to the state shown in FIG.

  According to the optical disc apparatus 10 of the embodiment of the present invention, the connecting plate 47 that rotates the elevating levers 45L and 45R is configured to always urge in the direction in which the disc 12 is held by the urging spring 50. As a result, abrupt contact between the chuck pawl 35 and the disk 12 can be avoided, and noise during disk holding can be reduced. Further, since the connecting plate 47 and the pair of lift levers 45L, 45R are engaged via the gear portions 47L, 47R, 48L, 48R, respectively, it is possible to prevent timing shift of the lift levers 45L, 45R. .

  Although the drive source of the drive lever 49 is not shown in the present embodiment, a dedicated drive source may be provided, or other than using the dedicated drive source, for example, as shown in FIGS. In the optical disc apparatus 10 as described above, a series of operation drive sources for rotating the suspension chassis 21 may be used.

  Further, according to the optical disc apparatus 10 of the embodiment of the present invention, the substantially Y-shaped cam groove 24 formed on the suspension chassis 21 and the substantially T-shaped cam groove 49b formed on the drive lever 49. Thus, the driving force for rotating the suspension chassis 21 via the rotation drive shaft 26 of the rotation lever 25 can be transmitted to the drive lever by a series of operations of the rotation lever 25. The rotating operation and the disc holding / releasing operation by the clamping mechanism 30 can be performed, the number of parts can be reduced, the apparatus can be downsized, and the operation timing can be prevented from being shifted, and a stable reproduction / writing operation can be performed.

  The present invention is not limited to the optical disc apparatus 10 that stacks and accommodates a plurality of discs 12 and selectively reproduces the discs 12 as described above, but is an optical disc of the type that inserts and reproduces the discs 12 one by one. The same applies to the device.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art can make modifications and applications based on the description and the well-known techniques. Is also within the scope of the present invention, which is intended to be protected.

  As described above, the optical disk apparatus according to the present invention is configured so that the connecting plate for rotating the elevating lever is urged in the direction in which the disk is always held by the urging spring, so Contact can be avoided, noise during holding of the disk can be reduced, and the present invention relates to an optical disk apparatus such as a CD or DVD, and in particular, an optical disk that holds the center hole of the disk on the turntable. It is useful as a device.

1 is an overall perspective view showing a car audio device incorporating an optical disk device according to an embodiment of the present invention. 1 is a plan view showing a standby state of an optical disk device according to an embodiment of the present invention as viewed from the position II-II in FIG. FIG. 1 is a plan view showing a reproduction state of an optical disk device according to an embodiment of the present invention viewed from the position II-II in FIG. (A) A plan view of the performance unit of the optical disk device in the embodiment of the present invention (B) A cross-sectional view of the performance unit of the optical disk device in the embodiment of the present invention (A) Plan view of the clamp mechanism of the optical disc apparatus according to the embodiment of the present invention (B) Sectional view of the clamp mechanism as viewed from the BB position in FIG. 5 (A) of the optical disc apparatus according to the embodiment of the present invention. The principal part expanded sectional view of the clamp mechanism of the optical disk apparatus in embodiment of this invention (A) Plan view of the clamp mechanism of the optical disc apparatus according to the embodiment of the present invention (B) Sectional view of the clamp mechanism at the BB position in FIG. 7 (A) of the optical disc apparatus according to the embodiment of the present invention (C) Enlarged view near the biasing spring 50 in FIG. The principal part expanded sectional view of the clamp mechanism of the optical disk apparatus in embodiment of this invention (A) A plan view of the protrusion of the clamp mechanism of the optical disk device in the embodiment of the present invention (B) The protrusion of the clamp mechanism of the optical disk device in the embodiment of the present invention as viewed from the direction B in FIG. FIG. 9C is a sectional view of the protruding portion of the clamp mechanism of the optical disc apparatus according to the embodiment of the present invention as viewed from the position CC in FIG. 9A. (A) Side view of elevating member in embodiment of the present invention (B) Sectional view of elevating member in embodiment of the present invention FIG. 3 is a plan view of a drive lever of the optical disc apparatus according to the embodiment of the present invention. The cam groove part enlarged view of the suspension chassis of the optical disk device in Embodiment of this invention Sectional drawing which shows the non-holding state of the disk by the clamp mechanism of the conventional optical disk apparatus Sectional drawing which shows the holding | maintenance state of the disk by the clamp mechanism of the conventional optical disk apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical disk apparatus 12 Disk 12a Recording surface 12b Label surface 12c Hollow part 13 Main body 30 Clamp mechanism 31 Turntable 35 Chuck claw 40 Lifting member 45a Taper 45L, 45R Lifting lever 47 Connecting plate 47L, 47R, 48L, 48R Gear part 50 Energizing Spring

Claims (3)

A clamp mechanism in which a plurality of chuck claws rotatably supported in the turntable hold and release the disk by raising and lowering the elevating member;
A rotatable elevating lever for lowering the elevating member;
A connecting plate disposed so as to be rotatable about the same axis as the center of the turntable, and connected via a lifting lever and a gear part;
An urging spring that engages with the connecting plate;
An optical disc apparatus configured to release the holding of the disc by interrupting the tip of the elevating lever between the turntable and the elevating member by rotating the connecting plate, and lowering the elevating plate,
An optical disc apparatus that urges the urging spring in a direction in which the connecting plate rotates in a disc holding direction. The optical disc apparatus according to claim 1,
An optical disc apparatus in which the connecting plate and the elevating lever are engaged via a gear portion. The optical disc apparatus according to claim 1 or 2,
An optical disc apparatus, wherein a taper is formed at a tip of the elevating lever that contacts the elevating member, and the elevating member rises while slidingly contacting the taper.

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