JP2005116111A - Disk driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk driving device surely inserting a disk on a tray into a casing even if the disk is bent. <P>SOLUTION: An opening 5 is formed in a casing 1, and a tray 6 is disposed to be inserted into/pulled out of the opening 5. A reception part 8 is formed to receive a disk D in the tray 6, and a projection 10 is formed around the reception part 8 to push up a clamp board 12 during the insertion of the tray 6. The clamp board 12 is moved upward by pressing of the projection 10. Thus, abutment of the outer peripheral end surface DB of the disk D and the outer peripheral end surface 12A of the clamp board is prevented even when the disk D is bent, and the tray 6 is surely inserted into the casing 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a disk drive device used for recording information such as music on a disk-shaped information recording medium such as a compact disk (CD), CD-R, or DVD, and reproducing the recorded information.

  Conventionally, one of disk drive devices uses a method of loading and unloading a disk-shaped recording medium (hereinafter referred to as an information recording disk or simply a disk) on a tray. The outline thereof will be described with reference to FIG. 7. Reference numeral 1 represents a housing of the apparatus, and 6 represents a tray that can be inserted into and removed from the housing. The receiving portion 8 is formed. In addition, a turntable 11 for rotating the disk D placed on the receiving portion 8 of the tray 6 is used as an apparatus for driving the disk D (reproducing or recording information on the disk) in the housing 1. In addition to the spindle motor 13 constituting the drive source and the clamp board 12 facing the turntable 11, an optical pickup (not shown) that moves in the radial direction along the rotating disk D is provided.

  In this type of disk drive device, the central portion of the disk D placed on the receiving section 8 is sandwiched between the turntable 11 and the clamp board 12, and the recorded information is rotated while rotating on the tray 6. When the disk D is exchanged, the turntable 11 descends and puts the disk D back into the receiving portion 8 so that the tray 6 on which the disk D is loaded is pushed out of the housing 1. It is like that.

  Here, in order to smoothly eject the disc, a tray provided with a protrusion around the receiving portion has been proposed (for example, Patent Document 1).

JP 2002-352499 A (claims, FIG. 6).

  However, the protrusion shown in Patent Document 1 is to contact the end face of the disk and drop the disk stuck to the clamp board into the receiving portion. When the disk or tray is warped It does not eliminate inconvenience.

  That is, when the tray on which the disc is placed on the receiving portion moves from the outside to the inside of the housing, if the disc or the tray is greatly warped, the outer peripheral portion DA of the disc becomes the upper surface of the tray 6 as shown in FIG. The outer peripheral end face DB of the disk comes into contact with the outer peripheral end face 12A of the clamp disk, and the tray 6 may not be able to move inside the housing 1. In some cases, the clamp disk 12 catches the disk D. In some cases, the disk D may be deviated from the receiving portion 8 of the tray 6 to damage the information recording surface of the disk D, or the drive system including the tray 6 may malfunction.

  The warpage of the disc is defined by the flatness of the disc standard. For example, a CD has a flatness of 0.4 mm or less, and a certain amount of warpage is allowed. On the other hand, in order to keep costs low, the tray is manufactured by molding a synthetic resin, and the receiving portion is designed with a flatness of 0.4 mm or less.

  Therefore, in general, in anticipation of such warpage, when the tray moves from the outside to the inside of the housing, the disc placed on the receiving portion and the clamp plate do not interfere with each other, so that there is a large margin between them. Measures are taken to reduce the warpage depending on the material and shape.

  However, there are discs in the market that have warped more than the flatness defined by the disc standards due to thermal deformation and changes over time. For this reason, the distance between the disk and the clamp board cannot be made too small, which has been an obstacle to reducing the overall thickness of the disk drive device. Also, since the grade of the material with less warpage due to heat and changes over time is selected as the material of the tray, it is difficult to reduce the cost.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to improve operation reliability while reducing the thickness and cost of a disk drive device.

In order to achieve the above object, the present invention forms a receiving portion 8 on which an information recording disk D is placed and forms a tray 6 that can be inserted into and removed from the housing 1, and an information recording disc D placed on the receiving portion 8. A turntable 11 for rotating the information recording disk D after being held away from the receiving portion 8 by a predetermined amount, and a rotatable clamp disk that sandwiches the central portion of the information recording disk D facing the turntable 11 And 12 in the housing 1.
The tray 6 is in front of the receiving portion 8 with respect to a direction in which the tray 6 moves from the outside to the inside of the housing 1 and is on the surface side of the tray 6 facing the clamp plate 12, and the tray 6 is Two protrusions 10 are provided at a position within the diameter of the clamp plate 12 at a position where the clamp plate 12 passes under the clamp plate 12 when moving from the outside to the inside of the housing 1. When the tray 6 moves from the outside to the inside of the housing 1, the tray 6 passes through a position sandwiching the center of the clamp plate 12 and can press the clamp plate 12 away from the information recording disc D. It is characterized by.

According to the disk drive device of the present invention, the following advantages can be obtained by the above configuration.
(1) By reducing the distance between the disk placed on the tray receiving portion and the clamp plate, the entire disk drive device can be made thinner.
(2) The operation of the disk drive device does not occur on most disks on the market, and the information recording surface of the disk is not damaged, and the reliability of the device is improved.
(3) In particular, when the tray moves toward the inside of the housing, the two projections pass through the position sandwiching the center of the clamp plate and press the clamp plate in the direction away from the disc, so the clamp pressed by the projection The disc does not tilt in the direction in which the protrusions are arranged, and the disc and tray can be inserted reliably while preventing the disc and the clamp disc from coming into contact with each other.
(4) Since an inexpensive material can be used for the tray, the cost can be reduced.

  Hereinafter, a disk drive device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a disk drive device according to the present invention. In this example, the disk drive device is a CD player that reproduces recorded information on a CD (compact disk) as an information recording disk (disc D). Reference numeral 1 denotes a housing of the apparatus (including an exterior and an internal chassis). The operation unit 2 includes an operation switch 3 for giving a specific control signal to an internal control circuit as an operation unit 2. A display unit 4 indicating the operating state of the system and a slit-shaped opening 5 are provided. A tray 6 is provided so as to be able to be inserted into and removed from the opening, and a disk D to be reproduced is placed on the tray 6. In addition to the main power switch, the operation switches 3 include a disk drive start button, song selection start, pause, and eject switch (for disc ejection).

  According to the disk drive device of this example, the desired disk D is placed on the tray 6 that extends horizontally from the opening 5 and loaded into the housing 1 by pushing the tray 6 to reproduce the recorded information. When the disk D is exchanged, the disk D can be ejected from the opening 5 while being placed on the tray 6 by pressing the eject switch.

  Next, FIG. 2 is a perspective view of the tray, and FIG. 3 shows a longitudinal section thereof. As is apparent from these drawings, in this example, the tray 6 is a rectangular plate integrally molded from synthetic resin, and both side edges thereof are slidable in the horizontal direction by guides (not shown) inside the housing 1. Thus, the ridge 7 to be supported is formed.

  On the other hand, the upper surface of the tray 6 is formed with a receiving portion 8 formed of a circular tapered recess for placing a disk. Concentric shelves 8A and 8B are formed inside the receiving portion 8, both of which are for supporting the peripheral edge of the disk. Among these, the outer rack 8A is a large-diameter disk (book). In the example, it is used for a CD having a diameter of 12 cm, and the inner shelf 8B is used for a small-diameter disk (in this example, a single CD having a diameter of 8 cm).

  The tray 6 is opened with a long hole 9 extending from the center of the receiving portion 8 toward the outside. The long hole 9 is for irradiating the information recording surface with a laser beam from below the disk placed in the receiving portion 8, and this moves in the radial direction of the disk while transmitting and receiving the laser beam (not shown). A turntable, which will be described later, is formed along the movement path of the optical pickup and supports the center of the lower surface of the disk, particularly at one end of the long hole 9.

  Furthermore, two protrusions 10 having a predetermined height (about 1 to 10 mm) are formed at the periphery of the receiving portion 8 on the upper surface of the tray 6 (on the side facing the clamp plate described later). In this example, the projection 10 has a tapered shape (in this example, a truncated pyramid shape) having an inclined surface 10A inclined with respect to the insertion direction of the tray 6, as shown in FIG. 8 (a position in front of the receiving portion 8 with respect to the direction in which the tray 6 moves from the outside to the inside of the housing 1) and within an interval of the clamp plate diameter described later (with an interval smaller than the clamp plate diameter). And the tray passes through a position sandwiching the center of the clamp plate when moving inside the housing), and pushes up the clamp plate to prevent the disc from coming into contact with the clamp plate.

  According to the protrusion 10, even when the disc placed on the receiving portion 8 is greatly warped upward (on the non-recording surface side), the outer peripheral end surface of the disc contacts the clamp disc when the disc is inserted. Immediately before contact, the clamp plate is pushed up to allow the passage of the disc, and the tray 6 and the disc can be inserted reliably.

  Hereinafter, the operation of the disk drive apparatus will be described. FIG. 4 shows a state in which the tray 6 on which the disk D is placed is drawn into the housing 1, and at this time, the receiving portion 8 and the disk D placed on the receiving section 8 are in this state. The central portion is positioned between the turntable 11 and the clamp board 12. Here, the turntable 11 is for rotating the disk D placed on the receiving portion 8 while supporting it, and 13 indicates a motor that forms the drive source. In particular, the motor 13 and the turntable 11 attached to the output shaft thereof constitute an integral unit that can be lifted and lowered together with an optical pickup (not shown) and the like, and moves upward toward the disk D when the disk D is driven for reproduction. ing.

  On the other hand, the clamp board 12 is located at a position facing the turntable 11 and is rotatably provided on the upper portion of the housing 1 in a state where a predetermined amount can be moved upward. When the disk D is reproduced and driven, the turntable 11 advances into the receiving part 8 through the long hole 9 and carries the center part of the disk D placed here.

  FIG. 5 shows the state at the time of the reproduction drive. At this time, the disk D is rotated with the center part sandwiched between the turntable 11 and the clamp board 12 and slightly floating above the receiving part 8. Thus, the recorded information is read while the optical pickup (not shown) moves in the radial direction along the rotating disk D.

  By the way, when the tray 6 on which the disk D is placed on the receiving portion 8 moves from the outside to the inside of the housing 1, if the disk D or the tray 6 is greatly warped, as described with reference to FIG. In some cases, the outer peripheral portion DA of the disk D protrudes from the upper surface of the tray 6, and the outer peripheral end face DB of the disc contacts the outer peripheral end face 12 </ b> A of the clamp plate 12, so that the tray 6 cannot move into the housing 1.

  On the other hand, according to the disk drive device of the present invention, when the tray 6 is moved into the housing 1 (disk insertion / loading) as shown in FIG. When the lower surface is pressed, the disk is moved upward in a direction away from the disk D, so that the outer peripheral end face DB of the disk does not come into contact with the outer peripheral end face 12A of the clamp disc 12. Here, in the example shown in FIG. 6, the front side of the clamp plate 12 is pushed up by the protrusion 10 and is inclined with respect to the disc. However, the clamp plate 12 may move parallel to the disc D. Therefore, according to the present invention, the tray 6 can be reliably inserted even when the disk D is greatly warped toward the non-recording surface. Incidentally, when the disc is warped on the recording surface side, the clamp plate can be pushed up by the non-recording surface.

  In the above example, the disk is described as a compact disk. However, the present invention is not limited to this, and can be applied to all disk-like recording media such as CD-R, CD-ROM, and DVD, and in particular, recorded information can be rewritten at any time. Of course, when a disc is targeted, both a reproducing function and a recording function are provided.

Schematic perspective view showing the appearance of a disk drive device according to the present invention The perspective view which showed the tray used for the apparatus Vertical section of the tray Schematic showing the state in which the ray is drawn inside the housing Schematic diagram showing the state of disc playback drive Explanatory drawing which shows the state at the time of tray insertion in the disc drive device of this invention Schematic diagram of conventional equipment Explanatory drawing which shows the state at the time of tray insertion in a conventional apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Operation part 3 Operation switch 4 Display part 5 Opening part 6 Tray 7 Projection 8 Receiving part 8A, 8B Shelf 9 Long hole 10 Protrusion 11 Turntable 12 Clamp board 13 Motor

Claims (1)

A tray provided with a receiving portion on which the information recording disk is placed and provided so as to be able to be inserted into and removed from the housing; and the information recording disc placed on the receiving portion is held at a predetermined distance from the receiving portion and then held on the information recording disc. In a disk drive device comprising a turntable for rotation and a rotatable clamp disk sandwiching the central portion of the information recording disk opposite to the turntable in the casing,
The tray is in front of the receiving portion with respect to the direction in which the tray moves from the outside to the inside of the housing, and is on the side of the tray facing the clamp plate, and the tray is placed from the outside to the inside of the housing. Two protrusions arranged at intervals within the diameter of the clamp disk are provided at a position passing under the clamp disk when moving, and both the protrusions move the tray from the outside to the inside of the housing. A disk drive device characterized by having a height capable of sometimes passing through a position sandwiching the center of the clamp disk and pressing the clamp disk away from the information recording disk.

Images