JP3773401B2 - Disk unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk device capable of having a thin structure in which a disk having a center hole is loaded and the center hole of the disk is held by a rotary table.
[0002]
[Prior art]
FIG. 13 is an enlarged sectional view showing a disk clamping means of a conventional disk device.
[0003]
The rotary table 1 is fixed to the rotary shaft 2 a of the spindle motor 2, and the rotary table 1 is rotationally driven by the spindle motor 2. The rotary table 1 is integrally formed with a disk receiving portion 1a and a protrusion 1b. A clamp member 3 facing the rotary table 1 is rotatably supported by a clamp arm 4.
[0004]
The disc D transferred by the transfer roller 5 is supplied between the rotary table 1 and the clamp member 3 in a state where the clamp arm 4 is rotated upward and the clamp member 3 and the rotary table 1 are separated. . When the disk D is positioned at a position where the center hole D1 of the disk D coincides with the protrusion 1b, the clamp arm 4 is lowered and the center hole D1 of the disk D is moved by the disk receiving portion 1a of the rotary table 1 and the clamp member 3. The peripheral part of is sandwiched.
[0005]
As shown in FIG. 13, with the disk D clamped on the rotary table 1, the disk D is rotated by the spindle motor 2, and information is reproduced or recorded by the head facing the disk D. .
[0006]
In the conventional disc clamping means shown in FIG. 13, since the clamp member 3 faces the rotary table 1, the thickness dimension of the spindle motor 2 and the thickness dimension of the rotary table 1 are used as a mechanism for disc clamping. , And a height dimension larger than the thickness dimension of the clamp member 3 is required. Therefore, the overall height dimension is large, and there is a limit to reducing the thickness.
[0007]
Therefore, as a disk clamping means, there is a so-called self-chucking type in which a protrusion 1b of the rotary table 1 is provided with a disk holding means that is elastically pressurized to the peripheral edge of the center hole D1 of the disk D. When this self-chucking type rotary table is used, it is not necessary to provide the clamp member 3, and the disk clamping means can be made thin.
[0008]
[Problems to be solved by the invention]
However, in the case of using the self-chucking type rotary table, it is necessary to release the disk holding by the disk holding means by forcibly releasing the disk from the rotary table when the disk is released from the rotary table. It is. Conventionally, it is common to press the disk with a transfer roller for transferring the disk, thereby detaching the disk from the rotary table.
[0009]
However, when the disk is pressed by the transfer roller, the disk held on the rotary table is pressed only on one side of the rotary table, so that it is difficult to reliably remove the disk from the disk holding means. It was.
[0010]
The present invention solves the above-mentioned conventional problems, and in the case of using a self-chucking type rotary table, the disc can be reliably detached from the rotary table, and the disc has an influence on reproduction or the like when detached. An object of the present invention is to provide a disk device that does not give such scratches.
[0011]
[Means for Solving the Problems]
  The present invention relates to a disk receiving portion for receiving a disk surface.WhenA rotary table provided with a protrusion inserted into the center hole of the disk, and a disk holding means that is elastically pressurized to the center hole of the disk;,
  in frontDisc receiving partAnd hold the disc with the center hole of the discThe disk holding meansKeepA pressing member to be held;
  A transfer roller for transferring a disk between the rotary table and the pressing member, and separating the disk after the disk is held by the rotary table;
  A position away from the disk held on the rotary table, and a disk surface;Release position that contactsAnd a clamp release member that moves betweenAnd
  When the clamp release member moves to the release position, the rotary table is moved away from the disk while the disk is supported from the rotary table side by the clamp release member and the transfer roller. The holding of the disc by the disc holding means is releasedIt is characterized by this.
  The present invention also provides a disk receiving portion that receives the surface of the disk, a protrusion that is inserted into the center hole of the disk, and a rotary table provided with disk holding means that is elastically pressurized to the center hole of the disk. ,
  A pressing member that holds the disc between the disc receiving portion and holds the center hole of the disc by the disc holding means;
  A transfer roller for transferring a disk between the rotary table and the pressing member, and separating the disk after the disk is held by the rotary table;
  A clamp release member that moves between a position away from the disk held by the rotary table and a release position that contacts the disk surface;
  When the clamp release member moves to the release position, the disc is pressed by the clamp release member and the transfer roller in a direction away from the rotary table, and the holding of the disc by the disc holding means is released. It is characterized by this.
[0012]
In the present invention, the disc can be reliably detached from the rotary table by providing a clamp release member for separating the disc from the rotary table separately from the transfer roller.
[0013]
  The clamp release member isRelease positionWhen moving toThe clamp release memberDisc information recording areaAbuts against the positionIt is preferable.
[0014]
By setting the pressing location by the clamp release member outside the information recording area, it is possible to prevent the disc from being damaged which affects information reproduction when the disc is pressed.
[0015]
For example, the pressed portion is located on the inner periphery side of the disc with respect to the information recording area. However, it may be a position where the pressed location deviates from the information recording area toward the outer periphery of the disc.
[0017]
  In the present invention, when the clamp release member moves to the release position,The transfer roller presses the diskMovementSaku andButPreferably at the same time, and, When the clamp release member moves to the release position, the contact point between the clamp release member and the disk,The contact point between the transfer roller and the diskBut saidRotating tableFromThe same distance awayingIt is preferable.
[0018]
By setting as described above, the disc can be surely detached from the rotary table, and when the disc is ejected by the transfer roller, the clamp release member functions to maintain the disc easily at a height. And the disc can be ejected smoothly.
[0019]
Further, when assuming a virtual triangle having a contact line between the transfer roller and the disk as a base and a point pressed against the disk by the clamp release member as a vertex, the disk holding means is positioned inside the virtual triangle. A uniform detachment pressing force can be applied to the disk.
[0020]
Further, the present invention is provided with pressure driving means for driving at least one of the rotary table and the pressing member in a direction in which both members approach each other and holding the center hole of the disk by the disk holding means. Yes, when the disc is held on the rotary table, the pressing member approaches the rotary table, or the rotary table approaches the pressing member, and further, the pressing member and the rotary table approach simultaneously.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
1A is a perspective view showing a first embodiment of the disk apparatus of the present invention, FIG. 1B is a perspective view showing a drive unit of the disk apparatus, and FIG. 2 is a preferable example of a clamp release member. FIG. 3 is a plan view showing a state where a large-diameter disk is loaded on the disk device, FIG. 4 is a plan view showing a state where a small-diameter disk is loaded on the disk device, and FIG. FIG. 6 is a partially enlarged sectional view when the disk is clamped, and FIG. 7 is a partially enlarged sectional view showing completion of clamping of the disk.
[0022]
A housing 10 of the disk device shown in FIG. 1 and the following includes a box-shaped main body chassis 11 whose upper portion is opened, and a plate member 12 fixed to the upper portion of the main body chassis 11. An insertion / discharge port 13 extending in the lateral direction is opened in the front surface of the main body chassis 11. From this insertion / discharge port 13, a large-diameter disk Da having a diameter of 12 cm and a small-diameter disk Db having a diameter of 8 cm can be inserted. Each of the disks Da and Db is a reproduction-only disk such as a CD or DVD, or a disk that can be reproduced and recorded.
[0023]
The plate 12 has a window 14 that opens in a rectangular shape, and a guide plate 15 is formed integrally with the plate 12 on the front side of the window 14. A circular hole 16 is opened in the guide plate 15. As shown in FIG. 5, a pressing pad (pressing member) 17 formed of a thin resin plate is fixed to the lower surface of the outer peripheral portion 15 a of the hole 16 of the guide plate 15. A pressing portion 18 is formed by the outer peripheral portion 15 a of the guide plate 15 and the pressing pad 17. Note that the pressing pad 17 may not be provided, and the guide plate 15 itself may be the pressing member.
[0024]
In the main body chassis 11, a transfer roller 21 constituting a transfer means is provided inside the insertion / discharge port 13. The transfer roller 21 is mounted on the outer periphery of the roller shaft 22, and a transfer motor for driving the roller shaft 22 and the transfer roller 21 is provided in the main body chassis 11.
[0025]
As shown in FIGS. 5 and 6, the transfer roller 21 has a clamping position (i) where the disk Da or Db can be clamped between the pressing pad 17 and the pressing pad 17 and the disk Da as shown in FIG. Alternatively, it can be moved between a retreat position (ii) away from Db downward. A moving mechanism (not shown) for moving the transfer roller 21 between the clamping position (i) and the retracted position (ii) is provided in the main body chassis 11.
[0026]
A drive unit 25 is provided in the main body chassis 11. The drive unit 25 has a box-shaped drive chassis 26 having an open top. The drive chassis 26 is provided with a spindle motor 27, and a rotary table 28 is fixed to a rotary shaft 27 a of the spindle motor 27.
[0027]
As shown in FIG. 5, the rotary table 28 is provided with a protrusion 28a mounted in the center hole of the disk at the center, and a disk receiving portion 28b is formed on the upper surface of the outer peripheral flange. Disc holding means 29 are provided at a plurality of locations (for example, three or four locations arranged at equal angles in the circumferential direction) on the outer peripheral portion on the upper side of the protrusion 28a. The disk holding means 29 includes a spherical pressure member 29a and a biasing member 29b by a compression coil spring that biases the pressure member 29a in a direction protruding from the outer periphery of the protrusion 28a.
[0028]
As shown in FIG. 1B, the drive chassis 26 is provided with an optical head 31. The optical head 31 is movable in the α direction along the radial direction of the disk, and a thread mechanism (not shown) for moving the optical head 31 in the α direction is mounted on the drive chassis 26.
[0029]
The optical head 31 houses therein a light emitting element, a light receiving element, and various optical elements, and an objective lens 32 for condensing detection light or recording light on the recording surface of the disk is provided on the upper surface thereof. .
[0030]
As shown in FIG. 1B, large-diameter disk positioning members (positioning pins) 34 and 34 are fixed to the upper surface of the edge of the drive chassis 26 on the back side of the apparatus with a gap therebetween.
[0031]
Between the positioning member 34 and the positioning member 34, a positioning means 35 for a small-diameter disk is provided. In the positioning means 35, a rotating member 37 is rotatably supported on a shaft 36, and a pair of positioning members (positioning pins) 38, 38 are fixed to the upper surface of the rotating member 37 with a gap therebetween. Yes. The rotating member 37 is biased by a biasing means (not shown) in the β1 direction, that is, in a direction in which the positioning members 38 and 38 are in a posture extending vertically on the drive chassis 26.
[0032]
A stopper 41 is provided in the drive chassis 26 so as to be movable in the α direction. The stopper 41 is urged in the α2 direction by a spring 42. When the stopper 41 is moving in the α2 direction, the stopper 41 is hooked below the rotation fulcrum of the rotating member 37, and in this state, the rotation of the rotating member 37 in the β2 direction is restricted. The
[0033]
The optical head 31 is provided with a release member 43 extending in the α1 direction, the optical head 31 moves in the α1 direction, and the objective lens 32 is further on the inner circumference than the inner circumference ends of the data recording areas of the disks Da and Db. When moving to the side (α1 direction), the stopper 41 is pushed in the α1 direction by the release member 43, and the stopper 41 and the rotation member 37 are disengaged.
[0034]
The drive chassis 26 is provided with a clamp release member 45, and the clamp release member 45 is supported so as to be rotatable upward with a shaft 46 as a fulcrum. On the upper part of the clamp release member 45, release protrusions 45a and 45a for pushing the disk upward are provided.
[0035]
A drive pin 49 is fixed to the clamp release member 45. A drive plate 47 is slidably supported in the α direction on the front surface of the drive chassis 26, and a drive hole 48 for guiding the drive pin 49 is formed in the drive plate 47. When the drive plate 47 moves in the α1 direction, the drive pin 49 is lifted by the inclined portion 48a of the drive hole 48, and the disc is lifted upward by the release protrusions 45a and 45a.
[0036]
A pair of guide pins 51 and 51 are fixed to both end faces of the drive chassis 26 of the drive unit 25, respectively. Guide holes 52, 52 are formed on both side surfaces of the main body chassis 11, and the guide pins 51, 51 are inserted into the guide holes 52, 52 from the inside. The guide holes 52, 52 have a horizontal guide portion 52 a extending in the γ 1 -γ 2 direction and a pressure guide portion 52 b extending in the height direction of the main body chassis 11.
[0037]
A pressure drive member 53 constituting pressure drive means is supported on the outside of the side plate of the main body chassis 11 so as to be movable in the γ direction. A driving hole 54 is formed in the pressure driving member 53, and the guide pin 51 is inserted into the driving hole 54.
[0038]
When the pressure drive member 53 moves in the γ1 direction, the guide pin 51 is lifted along the pressure guide part 52b by the pressure part 54a inclined in the drive hole 54. Further, when the pressure drive member 53 moves in the γ2 direction, the guide pin 51 is pushed along the horizontal guide portion 52a by the transfer portion 54b of the drive hole 54, and the drive unit 25 moves in the device back direction (γ2 direction). Be made.
[0039]
Next, the operation of the disk device will be described.
FIG. 3 shows the operation of mounting a large-diameter disk Da having a diameter of 12 cm. In a standby state in which no disc is inserted, the pressure driving member 53 shown in FIG. 1A moves in the γ1 direction, and the guide pin 51 is the front end on the γ1 side of the horizontal guide portion 52a of the guide hole 52 and is vertical. It is located in the lower end of the pressurization guide part 52b extended in this. Accordingly, the drive unit 25 stops at the clamp position (iii) shown in FIG. 3, and the protrusion 28 a of the rotary table 28 faces the hole 16 formed in the guide plate 15. Further, as shown in FIG. 5, a disk passage space is formed between the upper end of the protrusion 28 a of the rotary table 28 and the guide plate 15.
[0040]
When the large-diameter disk Da is inserted from the insertion / discharge port 13 and the insertion of the disk is detected, the transfer roller 21 rising to the clamping position (i) is rotated clockwise by the motor as shown in FIG. The driven large-diameter disk Da is sandwiched between the transfer roller 21 and the pressing pad 17 and transferred in the γ2 direction.
[0041]
The insertion / ejection port 13 is provided with optical detection means for detecting the diameter of the disc. When it is detected that the large-diameter disk Da is inserted, the optical head 31 is moved in the α1 direction by the thread mechanism in the drive unit 25. The optical head 31 moves further to the inner circumference side than the innermost circumference of the data recording area of the disk, the stopper 41 is pushed out in the α1 direction by the release member 43, and the regulation of the rotating member 37 is released.
[0042]
Therefore, when the edge of the large-diameter disk Da transferred by the transfer roller 21 hits the positioning members 38, 38 for the small-diameter disk, the rotating member 37 is rotated in the β2 direction by the transfer force of the disk. 38 are disengaged from the front edge of the disk in the direction of travel. At this time, it is preferable that a retraction mechanism for revolving the rotation member 37 in the β2 direction to retreat the positioning members 38, 38 from the recording surface of the disk Da is provided. When the large-diameter disk Da is transferred as it is, the edge of the large-diameter disk Da hits the positioning members 34 for the large-diameter disk, and the large-diameter disk Da is positioned. In this positioning state, the center hole D1 of the large-diameter disk Da faces the protrusion 28a of the rotary table 28.
[0043]
Note that when the large-diameter disk Da is transferred, the guide plate 15 exhibits a function of guiding the disk upward, so that it is possible to prevent the disk from swinging upward during the transfer.
[0044]
When the large-diameter disk Da is positioned, the pressure driving member 53 shown in FIG. 1 (A) further moves in the γ1 direction, and the guide pin is driven by the pressure portion 54a of the driving hole 54 formed in the pressure driving member 53. 51 is lifted along the pressure guide portion 52b of the guide hole 52, and the drive unit 25 is raised. Therefore, as shown in FIG. 6, the protrusion 28 a of the turntable 28 enters the center hole D <b> 1 of the large-diameter disk Da and further enters the hole 16 of the guide plate 15. Further, the outer peripheral portion of the center hole D1 of the disk Da is sandwiched between the disk receiving portion 28b of the rotary table 28 and the pressing pad 17 by the ascending force of the drive unit 25. In the disk holding means 29 provided on the rotary table 28, the pressurizing body 29a receiving the urging force of the urging member 29b gets over the edge of the center hole D1 and is pressed to the upper side of the edge. The center hole D1 is held on the rotary table 28 (self-chucking).
[0045]
When the drive unit 25 is in the clamping position (iii) shown in FIG. 3 and the center hole D1 of the large diameter disk Da is clamped to the rotary table 28, a part of the large diameter disk Da is inserted into the insertion / discharge port 13. Projects outward. Therefore, the clamping operation is performed in a state where the large-diameter disk Da is supported by the insertion / ejection port 13, and the disk can be prevented from moving greatly up and down during clamping. Further, it is possible to adopt a structure in which the large-diameter disk Da is inserted by hand until it hits the positioning members 34, 34 without providing the transfer roller 21.
[0046]
When the disk clamping is completed, the pressure driving member 53 shown in FIG. 1A moves in the γ2 direction. When the pressure drive member 53 moves in the γ2 direction, the guide pin 51 is lowered along the pressure guide portion 52b by the pressure portion 54a inclined in the drive hole 54. As shown in FIG. The rotary table 28 holding the diameter disk Da is separated from the guide plate 15 and the pressing pad 17. At this time, the transfer roller 21 is also lowered and moved away from the large-diameter disk Da to the retracted position (ii).
[0047]
When the pressure drive member 53 further moves in the γ2 direction, the guide pin 51 is pushed along the horizontal guide portion 52a by the transfer portion 54b of the drive hole 54, and the drive unit 25 is moved in the device back direction (γ2 direction). . As shown in FIG. 3, the drive unit 25 stops when the large-diameter disk Da has moved to the drive position (iv) where the large-diameter disk Da is completely drawn into the housing 10, and the spindle motor is driven at the drive position (iv). 27 starts, the large-diameter disk Da is driven by the rotary table 28, and the information recorded on the disk is reproduced by the optical head 31, or the information is recorded on the disk.
[0048]
Next, as shown in FIG. 4, when the small-diameter disk Db is inserted from the insertion / discharge port 13 and is transferred by the transfer roller 21, the small-diameter disk Db is recognized by the detecting means provided in the insertion / discharge port 13. Is done. At this time, in the drive unit 25 stopped at the clamp position (iii), the optical head 31 does not move greatly in the α1 direction, and the stopper 41 is engaged with the rotating member 37 of the positioning means 35 for the small-diameter disk. Thus, the positioning members 38 for the small-diameter disk are restricted in a vertically oriented state.
[0049]
Therefore, the disk is positioned when the front edge of the transferred small-diameter disk Db hits the positioning members 38, 38, and the center hole D 1 of the small-diameter disk Db faces the protrusion 28 a of the rotary table 28.
[0050]
When the small-diameter disk Db is positioned, exactly the same operation as when the large-diameter disk Da is positioned is performed, the drive unit 25 is raised, and the protrusion 28a of the rotary table 28 is moved to the disk as shown in FIG. The center hole D1 and the hole 16 of the guide plate 15 are inserted, and the center hole D1 of the small-diameter disk Db is held by the disk holding means 29. Thereafter, as shown in FIG. 6, the rotary table 28 holding the disk is lowered, and the drive unit 25 is further moved to the back side of the apparatus (in the γ2 direction). When the drive unit 25 reaches the drive position (v) shown in FIG. 4, the drive unit 25 stops and the small-diameter disk Db is driven.
[0051]
  Small diameter disk DbIs clamped by the drive unit 25 at the clamp position (iii), a part of the small-diameter disk Db protrudes from the insertion / discharge port 13, but the drive unit 25 is at the drive position (v) shown in FIG. When moved, the small-diameter disk Db is completely stored in the housing 10. However, the drive position (v) at which the drive unit 25 stops when holding the small-diameter disk Db is inserted and ejected more than the drive position (iv) at which the drive unit 25 holding the large-diameter disk Da shown in FIG. It is a position close to the outlet 13 side.
[0052]
Next, the disc ejection operation will be described.
When ejecting the disc, the pressurization drive member 53 shown in FIG. 1A moves in the γ1 direction in both the large-diameter disc Da and the small-diameter disc Db, and the drive unit 25 is guided into the guide hole. 52 is returned to the clamp position (iii) along the horizontal guide 52a. Further, the guide pin 51 is lifted along the pressure guide portion 52 b by the pressure portion 54 a of the drive hole 54 of the pressure drive member 53. Accordingly, the rotary table 28 is raised to the same position as that at the time of disc clamping shown in FIG. The transfer roller 21 also moves to the clamping position (i).
[0053]
Thereafter, the pressure drive member 53 slightly moves in the γ2 direction, the guide pin 51 is lowered by the pressure portion 54a of the drive hole 54 of the pressure drive member 53, and the drive unit 25 is lowered. At this time, the rotary table 28 is lowered to the position shown in FIG. 5 while the disk Da or Db is held between the transfer roller 21 and the pressure pad 17, so that the pressure member 29 a of the disk holding means 29 serves as the disk. The center hole D1 is forcibly extracted downward, and the disc clamp is released.
[0054]
In this way, the rotary table 28 can be lowered while the disk is pressed by the transfer roller 21 and the pressure member 29a can be extracted from the center hole D1, but when the disk is pressed only by the transfer roller 21, When the rotary table 28 is lowered, the back side portion of the disk may bend downward, and the pressurizing member 29a may not be reliably removed from the disk center hole D1.
[0055]
Therefore, in this embodiment, when the rotary table 28 holding the disk rises to the position shown in FIG. 6, the drive plate 47 shown in FIG. 1B is driven by the power of the motor provided in the drive unit 25. Is moved in the α1 direction. Therefore, the drive pin 49 is lifted by the inclined portion 48 a of the drive hole 48 of the drive plate 47, and the clamp release member 45 is rotated upward about the shaft 46. Therefore, the disc is supported from below by the release protrusions 45a and 45a of the clamp release member 45.
[0056]
When the rotary table 28 is lowered, the disk is supported from below by the transfer roller 21 and the release protrusions 45a and 45a, so that the pressure member 29a of the rotary table 28 can be reliably pulled out from the center hole D1 of the disk. .
[0057]
When the protrusion 28a of the rotary table 28 comes out of the center hole D1, the transfer roller 21 is started and the disc is discharged from the insertion / discharge port 13 to the outside. When the large-diameter disk is ejected, the optical head 31 shown in FIG. 1B is moved in the α1 direction, the stopper 41 is moved in the α1 direction by the release member 43, and the rotating member 37 is a spring or the like. By the urging force, the small-diameter disk positioning members 38 and 38 are returned to the vertical posture by rotating in the β1 direction.
[0058]
FIG. 2 is a partial perspective view showing a more preferable structure of the clamp release member 45 installed on the drive chassis 26 of the drive unit 25.
[0059]
The clamp release member 45 shown in FIG. 2 is rotatably supported by the drive chassis 26 by a shaft 46 in the same manner as that shown in FIG. Then, it is rotated in the vertical direction by the drive plate 47 shown in FIG.
[0060]
The tip of the clamp release member 45 has an arm shape surrounding the periphery of the rotary table 28. And the release protrusion 45a is provided only in the tip part of the arm part located in the apparatus back | inner side ((gamma) 2 side).
[0061]
  When the disks Da and Db are clamped on the rotary table 28, the clamp release member 45 is rotated downward, and the release protrusion 45a is separated downward from the disks Da and Db. When the disc is ejected, the transfer roller 21 is in the retracted position.(Ii)Nipping position from(I)At the same time, the clamp release member 45 rotates upward and moves to the release position. At this time, the disks Da and Db are simultaneously lifted by the transfer roller 21 and the release protrusion 45a, and the center hole D1 of the disk is separated from the disk holding means 29 of the rotary table 28.
[0062]
When the transfer roller 21 rises to the clamping position (i), the release protrusion 45a is also lifted to the same height position. That is, the contact line La between the transfer roller 21 and the disk D (actually, the contact line La is a line connecting the contact points because both ends of the transfer roller in the axial direction are in contact with the disk D) and release. The pressing point P where the protrusion 45a presses the disk rises to the same height position.
[0063]
Therefore, the disks Da and Db can be reliably detached from the rotary table 28, and when the disk is subsequently ejected by the transfer roller 21, the release protrusion 45a functions as a guide member for the disk to be transferred. It is discharged from the insertion / discharge port 13 in a horizontal posture.
[0064]
Further, in the example of FIG. 2, assuming a virtual triangle Lf having the contact line La as the base and the pressing point P as the apex, the protrusion 28 a of the rotary table 28 and the pressure member 29 a of the disk holding means 29 are assumed. Are arranged inside the virtual triangle Lf. In this arrangement, when the disc is lifted by the transfer roller 21 and the release protrusion 45a, the center hole D1 is easily detached from the disc holding means 29.
[0065]
Further, the pressing portion P where the release protrusion 45a presses the disc is set further to the inner peripheral side of the disc than the inner peripheral end of the information recording area of the disc. Therefore, the recording area of the disc is not damaged by the release protrusion 45a, and the reproducing operation of the disc is not adversely affected.
[0066]
In FIG. 2, the release protrusion 45a is provided only on one arm portion of the tip of the clamp release member 45, but the release protrusion 45b may be provided on the tip 45b of the other arm portion.
[0067]
8 is a perspective side view showing a second embodiment of the present invention, FIG. 9 is a partially enlarged sectional view showing a disk transfer state, FIG. 10 is a partially enlarged sectional view showing a disk clamped state, and FIG. 11 is a disk driving state. FIG. 12 is a partially enlarged sectional view showing the operation of the clamp release member.
[0068]
In this disk apparatus, the same spindle motor 27 and rotary table 28 as those in the first embodiment are provided in a housing 60. However, in this embodiment, the spindle motor 27 and the rotary table 28 are provided without moving at predetermined positions in the housing 60. The rotary table 28 has a protrusion 28a and a disk receiving portion 28b, and a disk holding means 29 is provided on the outer periphery of the protrusion 28a. The disk holding means 29 includes a spherical pressure member 29a and an urging member 29b.
[0069]
As shown in FIG. 8, a pressing member 61 formed of a plate material is provided in the housing 60, and a base end of the pressing member 61 is rotatably supported by a shaft 62. A hole 65 is formed at the tip of the pressing member 61. The hole 65 faces the protrusion 28 a of the rotary table 28. A peripheral portion of the hole 65 in the pressing member 61 is a pressing portion 66. A pressing pad (pressing member) made of resin or the like may be separately fixed on the lower surface around the hole 65 of the pressing member 61.
[0070]
The pressing member 61 is urged downward by a force F1 by a spring 63 and urged upward by a force F2 by a spring 64. FIG. 8 shows a state in which the disk is driven. At this time, the pressing member 61 is balanced vertically between the F1 and F2. In this driving state, as shown in FIG. A clearance δ is set between 66 and the upper surface of the disk D.
[0071]
As shown in FIG. 8, a shaft 67 is fixed to the pressing member 61. A switching member 71 is provided on the side surface of the housing 60 so as to be driven to γ1 to γ2. The switching member 71 is formed with a clearance hole 72 that does not apply a restraining force to the shaft 67 during driving of the disk. A pressure groove 73 serving as a pressure drive member is continuously formed in an inclined manner from the escape hole 72 in the γ2 direction, and a separation groove 74 serving as a separation drive member is inclined from the escape hole 72 to the γ1 direction. Are formed continuously.
[0072]
  An insertion / discharge port 60a is opened in front of the housing 60, and the disc D is inserted from the insertion / discharge port 60a. A pair of transfer rollers 75 and 76 are provided inside the insertion / discharge port 60a as disk transfer means. The upper transfer roller 76 is fixed in position, and the lower transfer roller75Is provided so as to move up and down between a position where the disk is sandwiched by the transfer roller 76 and a position where the disk is separated from the disk, and the transfer roller 75 is driven to rotate in both forward and reverse directions by a motor.
[0073]
Further, as shown in FIG. 12 (not shown in FIG. 8), a clamp releasing means 80 is provided in the housing 60 on the back side of the spindle motor 27. This clamp release means 80 is provided with a clamp release member 81. The clamp release member 81 is rotatably supported by a shaft 82, and a release protrusion 83 is provided on the upper surface thereof.
[0074]
The housing 60 is provided with a drive plate 84 movably in the γ1-γ2 direction, and a drive hole 85 is formed in the drive plate 84. A shaft 86 is fixed to the clamp release member 81, and this shaft 86 is inserted into the drive hole 85. The drive hole 85 is formed with an inclined portion 85a for pushing up the clamp release member 81 upward.
[0075]
Next, the operation of the disk device according to the second embodiment will be described.
When the disc is loaded, the switching member 71 is driven in the γ2 direction, the shaft 67 and the pressing member 61 are lifted by the separation groove 74, and the space between the pressing portion 66 of the pressing member 61 and the rotary table 28 as shown in FIG. In addition, a passage space for the disk is formed. Further, the transfer rollers 75 and 76 come close to each other so that the disk can be transferred.
[0076]
The disk D inserted from the insertion / discharge port 60 a is sandwiched between the transfer rollers 75 and 76 and transferred to the back side of the housing 60 by the rotational force of the transfer roller 75. At this time, the pressing member 61 functions as a guide plate for guiding the transfer of the disk D from above.
[0077]
The disk D passes through the passage space between the rotary table 28 and the pressing member 61, and when the disk hits a positioning member (not shown) and is positioned, the center hole D1 of the disk D coincides with the protrusion 28a of the rotary table 28. To do.
[0078]
When the disk D is positioned, the switching member 71 moves in the γ1 direction, a downward force is applied to the shaft 67 by the pressure groove 73, and the pressing member 61 is moved downward. At this time, the disk D is pressed by the pressing portion 66 of the pressing member 61, the disk D is pressed against the disk receiving portion 28b of the rotary table 28, as shown in FIG. D1 is entered, and further enters the hole 65 of the pressing member 61. At this time, the lower transfer roller 75 is lowered to a position away from the disk D.
[0079]
At this time, the pressurizing body 29a of the disc holding means 29 provided on the rotary table 28 presses the center hole D1 of the disc D and gets over the peripheral edge of the center hole D1, and the disc D has the pressurizing body 29a and the disc receiving portion. It is sandwiched and held by 28b.
[0080]
When the disk clamping is completed, the switching member 71 moves in the γ2 direction, the shaft 67 enters the escape hole 72, the binding force to the shaft 67 disappears, and the pressing member 61 is applied with the urging force F1 of the spring 63 and the spring 64. It is elastically supported in a state balanced with the urging force F2. As described above, the clearance δ is formed between the disk D and the pressing portion 66. In this state, the spindle motor 27 is started and the disk D is rotationally driven, and a reproducing operation and a recording operation are performed on the disk.
[0081]
During the disk drive, the pressing member 61 functions as a means for preventing the disk D from coming off the rotary table 28. The function will be described in detail.
[0082]
First, the clearance δ is set as follows. The clearance δ is set in such a range that the center hole D1 is not detached from the pressurizing member 29a of the disk holding means 29 when the disk D is lifted upward by the inertial force due to external impact and the disk D hits the pressing portion 66. The
[0083]
Further, when the disc D lifted by the impact hits the pressing portion 66, an upward force is applied to the pressing portion 66. When the upward inertia force based on the mass of the disk D at this time is F3, the relationship between the upper and lower balance urging force of the spring 63 and the spring 64 and the inertia force F3 is that the disk D is an inertia force F3 and the pressing portion Even if it hits 66, it is set so that the pressing portion 66 does not move upward so that the center hole D1 is removed from the pressurizing body 29a.
[0084]
Therefore, the pressing member 61 functions as an elastic retaining means for elastically receiving the disk raised by the impact.
[0085]
Next, the operation when the disc is ejected will be described.
When the disc is ejected, first, the switching member 71 moves in the γ2 direction, the shaft 67 and the pressing member 61 are lifted by the separation groove 74, and the pressing portion 66 is separated from the disc D as shown in FIG.
[0086]
Simultaneously with or slightly after the operation, the transfer roller 75 rises and hits the lower surface of the disk D. Further, the transfer roller 75 is raised to lift the disk D, the center hole D1 of the disk D is disengaged from the pressurizing body 29a of the rotary table 28, and the center hole D1 is pulled out from the protrusion 28a of the rotary table 28. When the center hole D1 comes out of the projection 28, the disk D is sandwiched between the upper transfer roller 76 and the transfer roller 75.
[0087]
At the same time as the transfer roller 75 rises, the drive plate 84 shown in FIG. 12 moves in the γ2 direction, the shaft 86 is lifted by the inclined portion 85a of the drive hole 85, and the clamp release member 81 rotates upward. The disc D is lifted by the release protrusion 83.
[0088]
The disk D is lifted by both the transfer roller 75 and the clamp release member 81, so that the center hole D1 is surely removed from the pressurizing body 29a and can completely come out of the protrusion 28a.
[0089]
When the disk D is ejected from the insertion / ejection port 60a by the rotational force of the transfer roller 75, the drive plate 84 moves in the γ1 direction, and the clamp release member 81 returns to the posture shown by the solid line in FIG.
[0090]
In the embodiment shown in FIG. 7 and subsequent figures, it is preferable to use the clamp release member 45 shown in FIG. In this case, the clamp release member 45 shown in FIG. 2 is rotatably supported by the shaft 46 in the housing 60 shown in FIG. 8, and is turned up and down by a drive plate 84 as shown in FIG.
[0091]
As described above, in the first embodiment shown in FIG. 1 and subsequent figures, the rotary table 28 is raised and the disk is clamped to the rotary table 28, and in the embodiments shown in FIG. 8 and lower, the pressing member 61 is lowered. Although the disk is clamped to the rotary table 28, the disk may be clamped to the rotary table 28 by moving both the rotary table 28 and the pressing member in the approaching direction.
[0092]
【The invention's effect】
As described above, in the present invention, the disc is released from the rotary table by the clamp release member provided separately from the transfer roller, so that the disc is reliably released from the rotary table. Further, the disk can be easily detached from the rotary table by detaching the disk from the rotary table by both the transfer roller and the clamp release member.
[Brief description of the drawings]
FIG. 1A is a perspective view showing a first embodiment of a disk device of the present invention, and FIG. 1B is a perspective view showing a drive unit thereof.
FIG. 2 is a partial perspective view showing a more preferable structure of a clamp release member;
FIG. 3 is a plan view showing an operation of mounting a large-diameter disk in the disk device of the first embodiment;
FIG. 4 is a plan view showing an operation of mounting a small-diameter disk on the disk device of the first embodiment;
FIG. 5 is a partially enlarged cross-sectional view showing a state in which a disc is supplied in the disc device according to the first embodiment;
6 is a partial enlarged cross-sectional view showing a state in which the disc is clamped in the disc device according to the first embodiment; FIG.
FIG. 7 is a partially enlarged cross-sectional view showing a state in which the disk is driven in the disk device according to the first embodiment;
FIG. 8 is a perspective side view showing a second embodiment of the disk device of the present invention;
FIG. 9 is a partial enlarged cross-sectional view showing a state in which a disc is supplied in the disc device according to the second embodiment;
FIG. 10 is a partial enlarged cross-sectional view showing a state in which the disc is clamped in the disc device according to the second embodiment;
FIG. 11 is a partial enlarged cross-sectional view showing a state in which the disk is driven in the disk device according to the second embodiment;
FIG. 12 is a partially enlarged cross-sectional view showing a clamp release unit according to a second embodiment;
FIG. 13 is a cross-sectional view showing a disk clamping means of a conventional disk device;
[Explanation of symbols]
10 housing
11 Main unit chassis
12 Board material
13 Insertion / discharge port
15 Guide plate
16 holes
17 Press pad (press member)
18 Pressing part
21 Transfer roller
25 Drive unit
26 Drive chassis
27 Spindle motor
28 Rotating table
28a protrusion
28b disc receiver
29 Disc holding means
29a Pressurized body
29b Energizing member
31 Optical head
34 Positioning member for large-diameter discs
35 Positioning means for small diameter discs
37 Rotating member
38 Positioning member for small diameter disc
41 Stopper
43 Release member
45 Clamp release member
45a Release protrusion
47 Drive plate
51 Guide pin
52 Guide hole
52a Horizontal guide
52b Pressure guide
53 Pressure drive member
54 Drive hole
60 cases
60a Insertion / discharge port
61 Pressing member
63, 64 spring
65 holes
66 Pressing part
71 Switching member
72 Relief Hole
73 Pressure groove
74 Separation groove
80 Clamp release means
81 Clamp release member
83 Release protrusion
84 Drive plate
85 Drive hole

Claims (8)

A disc receiving portion for receiving the side of the disc, and a turntable the disc holding means is provided which is pressed elastically pressing the center projection is inserted into the hole, and the center hole of the disk of the disk,
To sandwich the disc with the previous SL disc receiving portion, and a pressing member for hold a center hole of the disk in the disk holding means,
A transfer roller for transferring a disk between the rotary table and the pressing member, and separating the disk after the disk is held by the rotary table;
A clamp release member that moves between a position away from the disk held by the rotary table and a release position that contacts the disk surface ;
When the clamp release member moves to the release position, the rotary table is moved away from the disk while the disk is supported from the rotary table side by the clamp release member and the transfer roller. The disk device is characterized in that the disk holding by the disk holding means is released . A disc receiving portion for receiving the surface of the disc, a protrusion inserted into the center hole of the disc, and a rotary table provided with disc holding means that is elastically pressurized to the center hole of the disc;
A pressing member that holds the disc between the disc receiving portion and holds the center hole of the disc by the disc holding means;
A transfer roller for transferring a disk between the rotary table and the pressing member, and separating the disk after the disk is held by the rotary table;
A clamp release member that moves between a position away from the disk held by the rotary table and a release position that contacts the disk surface;
When the clamp release member moves to the release position, the disc is pressed away from the rotary table by the clamp release member and the transfer roller, and the holding of the disc by the disc holding means is released. A disk device characterized by the above. After the disc is transferred between the rotary table and the pressing member, at least one of the rotary table and the pressing member is driven in a direction in which both members approach, and the disc holding means opens the center hole of the disc. 3. The disk device according to claim 1, further comprising a pressure driving means for holding the disk device. When the clamp releasing member is moved to said release position, the disk apparatus according to any one of claims 1 to 3 wherein the clamp releasing member comes into contact with the position disengaged from the information recording area of the disc. The disk device according to claim 4, wherein the clamp release member is in contact with the inner circumference side of the disk relative to the information recording area of the disk. Operation and the transfer roller disk drive according to claim 2, wherein the operation you press the disc are performed simultaneously when said unclamping member is moved to the release position. Claims wherein the unclamping member when moved to said release position, the contact area between the clamp release member and the disc, and the contact portion between the transfer roller and the disc have the same distance from the rotary table 7. The disk device according to any one of 1 to 6 . When the clamp releasing member is moved to the release position, when the base is the line of contact between the transfer roller and the disc, assuming a virtual triangle having the apexes contact area between the clamp release member and the disc, the the disk apparatus according to any one of claims 1 to 7 disk holding means is positioned on the inside of this imaginary triangle.

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