JP3866559B2 - Disk braking mechanism in disk drive device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk braking mechanism in a disk drive device such as a high-density disk or a compact disk.
[0002]
[Prior art]
Some conventional disk drive apparatuses are also provided with a disk braking mechanism in order to prevent a disk that has been rotating in the disk drive apparatus from being discharged from the disk drive apparatus in a rotated state. 4 and 5 are diagrams showing a disk braking mechanism in a conventional disk drive device.
The disk drive apparatus 101 includes a case 102 and a tray 103 that can be inserted into the case 102 and discharged from the case 102. The case 102 includes a bottom cover 102a and a top cover 102b. The tray 103 is slidably attached to the case 102.
A traverse mechanism 107 composed of components such as a spindle motor 105 that rotates the disk 104 and an optical pickup 106 that reads / writes signals from / to the disk 104 is attached to the tray 103. The spindle motor 105 is provided with a turntable 105 a for rotating the disk 102 integrally with the spindle motor 105.
[0003]
The shock-absorbing component 108 constituting the disc braking mechanism is made of synthetic fiber, rubber, or the like. When the disc 104 in the disc drive apparatus 101 is discharged out of the disc drive apparatus 101, the outer peripheral side surface (periphery) of the disc 104 It arrange | positions in the position which contacts 104a.
The disc 104 is ejected in the order of (3), (2), and (1) in FIG. If the disk 104 is to be ejected in a rotating state, the disk outer peripheral side surface 104a and the buffer member 108 come into contact with each other to apply a braking force, and the rotation of the disk 104 is decelerated and stopped.
On the other hand, in the case of the disc braking mechanism configured as described above, when the disc 104 is inserted into the disc drive apparatus 101, the disc outer peripheral side surface 102a and the cushioning component 104 are in contact with each other as when the disc 104 is ejected. become. In this case, the disc insertion operation is performed in the order of (1), (2), and (3) in FIG.
[0004]
As described above, when the disk 104 is ejected from the disk drive apparatus 101 and when the disk 104 is inserted into the disk drive apparatus 101, when a force is applied to the disk 104, the turntable 105 a provided in the spindle motor 105 is provided. The disc 104 that has been chucked may be displaced from the originally chucked position.
Even if the position is shifted when the disk is ejected, the disk is only taken out. However, when the position is shifted when the disk is inserted, the disk drive device is displaced between the rotation center of the spindle motor 105 and the center of the disk 104. This is a problem because it greatly affects the read / write characteristics of 101.
[0005]
An object of the present invention is to provide a disk braking mechanism in a disk drive device in which the force applied to the disk can be set separately when the disk is inserted and when the disk is ejected.
[0006]
[Means for Solving the Problems]
Therefore, the present invention provides a case and a disk drive device equipped with a spindle motor that rotationally drives a disk and includes a tray that can be inserted into and removed from the case. A disc braking mechanism comprising: a step portion that protrudes from the case toward the periphery of the disc; and a flexible piece that extends from the back side of the step portion in a direction intersecting with the disc periphery locus at the time of entry and exit and interferes with the disc periphery locus And the thickness of the flexible piece is made thicker than the distance between the stepped portion and the disk peripheral locus.
[0007]
When the disc is inserted, the disc is loaded into the tray. Thereafter, the tray is inserted into the case. The periphery of the disc passes through the step. Since the flexible piece extends in a direction intersecting with the disc peripheral locus when the tray is moved in and out and interferes with the peripheral locus, the peripheral edge of the disc comes into contact with the flexible piece. The tray is housed in the case while the disc lays down the flexible piece at the periphery. The flexible piece abuts the disk, but can be freely laid down, so that a large force is not applied to the disk, and the disk maintains a proper and accurate position on the tray.
[0008]
When the disc is ejected, the periphery of the disc comes into contact with the flexible piece. At the periphery of the disc, the flexible piece is laid down toward the step. Since the thickness of the flexible piece is larger than the distance between the step portion and the disc peripheral track, the flexible piece is sandwiched between the disc periphery and the disc-opposing surface of the step portion. As a result, when the disc is ejected, a braking force against rotation acts on the disc. When the disc is ejected, even if a positional deviation occurs with respect to the tray or the spindle motor, the disc is merely removed from the tray, and the function of the disc drive apparatus is not hindered.
[0009]
It is preferable that the spindle motor rotates the disk in a direction in which the flexible piece lies down toward the stepped portion.
When the disc is ejected, if the disc rotates in the direction of falling toward the step, the disc causes the flexible piece to fall in the step direction by a tangential frictional force. If the disc rotates in the opposite direction, the flexible piece may fall in a direction that does not mesh with the stepped portion. It is securely clamped between the disk facing surface.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a disk braking mechanism in a disk drive device according to the present invention will be described with reference to the drawings.
[0011]
1 and 2 are plan views of the disk drive device. The disk drive device 1 includes a case 2 and a tray 3 that can be inserted and ejected from an opening of the case 2. The case 2 includes a bottom cover 2a and a top cover 2b. The bottom cover 2a and the top cover 2b form a storage space for the tray 3. The tray 3 is attached to the case 2 so as to be slidable in the radial direction of the disk 4.
A traverse mechanism 7 composed of components such as a spindle motor 5 that rotates the disk 4 and an optical pickup 6 that reads / writes signals from / to the disk 4 is attached to the tray 3. The spindle motor 5 is provided with a turntable 5 a for rotating the disk 2 integrally with the spindle motor 5.
[0012]
The disc braking mechanism 8 according to the present invention is fixed to the case 2 of the disc drive device 1, particularly to the bottom cover 2a. The disc braking mechanism 8 is disposed on the opening side of the case 2 from the center of the disc when the disc is stored in the case 2, that is, in a state where the disc is rotationally driven.
In this embodiment, the disc braking mechanism 8 includes a step portion 8a protruding from the bottom cover 2a toward the periphery of the disc, and a rectangular tongue-shaped flexible piece 8b attached to the step portion 8a. But the flexible piece 8b may be attached to the case 2, ie, the bottom cover 2a. The flexible piece 8b is disposed on the back side of the case 2 with respect to the step portion 8a, that is, on the side opposite to the opening with respect to the step portion 8a.
[0013]
The upper surface of the stepped portion 8a, that is, the disc-facing surface of the stepped portion 8a extends along the locus of the periphery of the disc 4 when the tray 3 is inserted and ejected. However, the upper surface of the step portion 8 a is separated from the locus of the peripheral edge of the disk 4, and the upper surface of the step portion 8 a itself does not contact the peripheral edge of the disk 4.
The flexible piece 8b is attached to the rear end of the step portion 8a. When the flexible piece 8b is attached to the bottom cover 2a, the flexible piece 8b is close to or adjacent to the rear end of the step portion 8a. The flexible piece 8b extends in a direction orthogonal to the disc peripheral track. The flexible piece 8b extends to a position that intersects, that is, interferes with the disk peripheral track. The flexible piece 8b is made of an elastic body such as synthetic fiber or rubber. The flexible piece 8b is slightly thicker than the gap (interval) between the upper surface of the stepped portion 8a and the disk peripheral locus, and can be elastically deformed up to the gap.
[0014]
Next, the operation of the disc braking mechanism according to the present invention will be described with reference to FIGS. 1 to 3 when the disc is inserted and when the disc is ejected.
In FIG. 1 to FIG. 3, when reading a signal or writing a signal to the disk 4, the turntable 5 a provided in the spindle motor 5 with the disk 4 being pulled out from the disk drive device 1. Chuck to Thereby, the disk 4 can rotate integrally with the spindle motor 5. Next, the tray 3 is inserted into the disk drive device 1. Since the disk 4 is integrally attached to the spindle motor 5 which is a component of the traverse mechanism 7 fixed to the tray 3, it is inserted into the disk drive device 1 together with the tray 3.
[0015]
The disk 4 comes into contact with the disk braking mechanism in the process of being inserted into the disk drive device 1.
FIG. 3 shows the process. FIGS. 3 (1), (2), (3), and (4) show the disk 4 insertion operation. As the disk 4 is inserted into the disk drive device 1, the outer peripheral side surface (periphery) 4 a of the disk 4 and the disk braking mechanism 8 approach each other. When the disk 4 is inserted to the position shown in FIG. 3B, the outer peripheral side surface 4a of the disk 4 passes on the disk-facing surface of the stepped portion 8a and comes into contact with the subsequent flexible piece 8b.
As the disk 4 is further inserted, the flexible piece 8b is bent as shown in FIG. When the disc 4 is further inserted, the disc 4 excludes the flexible piece 8b from the disc peripheral locus. When the disk 4 passes through the disk braking mechanism 8, the flexible piece 8b returns to the original posture state shown in FIG. The flexible piece 8b is disposed at a position where it does not interfere with the disk 4 as shown in FIG. 3 (4) when the insertion of the tray 3 into the disk drive device 1 is completed.
[0016]
On the other hand, the process of ejecting the disk 4 from the disk drive device 1 is shown in the order of FIGS. 3 (4), (3) ′, (2) ′, and (1). When the tray 3 is moved in the ejection direction from the insertion completion position of the disk 4 shown in FIG. 3- (4), the outer peripheral side surface 4a of the disk 4 and the flexible piece 8b approach each other. When the disk 4 is ejected to the position shown in FIG. 3 (3) ′, the outer peripheral side surface 4 a of the disk 4 comes into contact with the flexible piece 8 b of the disk braking mechanism 8. When the disc 4 is further ejected, the flexible piece 8b bends in the direction opposite to that when the disc 4 is inserted, that is, in the direction of the step portion 8a.
[0017]
The spindle motor 5 is preferably controlled to rotate in the clockwise direction in FIG. When the disc is ejected, the direction in which the flexible piece 8b receives a force by friction from the periphery of the disc coincides with the direction in which the flexible piece 8b falls, so that the flexible piece 8b surely falls toward the stepped portion 8a. .
[0018]
When the disc 4 is further ejected from there, the flexible piece 8b is deformed along the disc facing surface of the step portion 8. The thickness of the flexible piece 8b is larger than the distance between the disk-facing surface of the stepped portion and the disk peripheral track. Therefore, as shown in FIG. 3B, the flexible piece 8b is sandwiched between the peripheral edge of the disk and the disk facing surface of the step portion 8. Due to this action, a braking force acts on the disk 4, and the disk 4 stops rotating.
When the disk 4 is further ejected, the disk 4 rolls on the flexible piece 8b and then loses contact with the flexible piece 8b. The disk 4 is completely discharged from the apparatus together with the tray 3. The flexible piece 8b returns to the original posture state shown in FIG.
[0019]
【The invention's effect】
The disc braking mechanism according to the present invention can set the force applied to the disc by the disc braking mechanism separately when the disc is inserted and when the disc is ejected. As a result, the force applied to the disc when inserting the disc can be reduced while ensuring the contact pressure to the disc outer peripheral side surface necessary for disc braking, so that the disc is less likely to be displaced on the turntable. The influence on the read / write characteristics can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view when a tray is ejected in a disk drive apparatus employing a disk braking mechanism according to the present invention.
FIG. 2 is a plan view when a tray is inserted in a disk drive device employing a disk braking mechanism according to the present invention.
3 is an operation explanatory diagram of a disk braking mechanism in the disk drive device shown in FIGS. 1 and 2. FIG.
FIG. 4 is a plan view showing a conventional disk drive device.
5 is an operation explanatory diagram of a disk braking mechanism in the disk drive device of FIG. 4. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc drive apparatus 2 Case 2a Bottom cover 2b Top cover 3 Tray 4 Disc 5 Spindle motor 5a Turntable 6 Optical pick-up 7 Traverse mechanism 8 Disc brake mechanism 8a Step part 8b Flexible piece

Claims (4)

In a disk drive device that includes a case and a spindle motor that rotationally drives the disk and includes a tray that can be inserted into and removed from the case.
A step that protrudes from the case toward the periphery of the disc from the center of the disc when the disc is stored, and a disc periphery locus that extends from the back side of the step in a direction intersecting with the disc periphery locus when entering and exiting. And a disc braking mechanism having a flexible piece that interferes with
A disc braking mechanism in a disc drive apparatus, wherein the thickness of the flexible piece is greater than the distance between the stepped portion and the disc peripheral track. The disk braking mechanism according to claim 1, wherein the flexible piece is integrally attached to a rear end of the stepped portion. The disc braking mechanism according to claim 1, wherein the flexible piece is attached to the case adjacent to a rear end of the stepped portion. The disc brake mechanism according to any one of claims 1 to 3, wherein the spindle motor rotates the disc in a direction in which the flexible piece lies down toward the stepped portion.

Images