JP3395461B2 - Optical disk drive - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk drive device in which dust adheres to an optical disk recording medium or an optical pickup as much as possible. 2. Description of the Related Art An optical disk drive device irradiates a laser beam from an optical pickup to drive a disk-shaped optical disk recording medium mounted as a recording medium to rotate, thereby forming a minute pit called a pit on the surface of the optical disk recording medium. This device demodulates recorded information formed in a simple groove in accordance with the amount of reflected light and the like, and electrically outputs the demodulated information. At present, an optical disk drive device generally includes a disk tray for loading a disk, and a loading tray system in which the disk tray is pulled out from the inside of the housing to the front of the housing so that an optical disk recording medium can be detachably exchanged. Most commonly employed. A conventional loading tray type optical disk drive will be described in detail with reference to the drawings. FIG. 5 is a right side view showing a disk replacement state of the conventional optical disk drive device, FIG. 6 is a right side view showing the same disk storage state,
FIG. 7 is a right side view showing the disk rotating state. In the figure, α is an optical disk drive, D is an optical disk recording medium, P is an optical pickup, X is a gap,
1 is a housing, 2 is a front opening, 3 is a door, 4 is a disc tray, 5 is a circuit board, 6 is a mechanical unit, 7 is a turntable, 8 is a pulley base, and 9 is a chucking pulley. The conventional optical disk drive device α shown in FIGS. 5 to 7 has a housing 1, a front opening 2 penetrating a part of the front of the housing 1, and a cover for the front opening 2. A door 3 pivotally supported on the front surface of the housing 1 so as to be openable and closable outward;
An optical disc recording medium D is detachably mounted thereon and is fixed to both sides of the inside of the housing 1 through the front opening 2 so as to be horizontally movable between the front surface of the housing 1 and the inside of the housing 1. Disc tray 4 sliding on guide rails
And a circuit board 5 serving as a control electric system fixed to the bottom surface inside the housing 1, and driving of the optical disk recording medium D and the optical pickup P disposed immediately below the storage position of the disk tray 4 inside the housing 1. A mechanical unit 6 serving as a mechanical system; a turntable 7 extending upward from the mechanical unit 6 and made of a metal material rotatably supporting a center hole of the optical disc recording medium D from below; An optical pickup P mounted movably in the radial direction of the optical disc recording medium D, a pulley base 8 fixed to the inner top surface of the housing 1, and a magnet rotatably supported by the pulley base 8. And a chucking pulley 9 made of a material. The loading operation in the optical disk drive α will be described with reference to the drawings. First, it is assumed that the optical disk drive device α is in the disk exchange state shown in FIG. The operator places the optical disk recording medium D on the disk tray 4. When the operator gives a loading instruction to the circuit board 5, the circuit board 5 drives a loading motor (not shown) to rotate in a normal direction, and the disk tray 4 moves on a guide rail (not shown) inside the housing 1 with the driving of the loading motor. , And is drawn into the housing 1 to be in the disk storage state shown in FIG. When the disk tray 4 is pulled into the housing 1, the circuit board 5 supplies a current to a solenoid (not shown) for driving a mechanical unit, and raises the mechanical unit 6 to a position close to the reading surface of the optical disk recording medium D. Then, the chucking pulley 9 made of a magnetic material is attracted to the turntable 7 made of a metal material. As a result, the center hole of the optical disc recording medium D is sandwiched from above and below by the chucking pulley 9 and the turntable 7 provided on the upper surface of the mechanical unit 6, and as shown in FIG. Is rotatably pivoted. Finally, the circuit board 5 drives a spindle motor (not shown) to rotationally drive the optical disk recording medium D to read recorded information. The conventional optical disk drive device α operates in this manner. However, in the above-mentioned conventional loading tray type optical disk drive apparatus α, there are rotation mechanisms such as a spindle motor and an optical pickup feed motor (not shown). An air flow is generated by the rotation operation, or an air flow is generated by an intake negative pressure of a cooling fan of an information processing device (not shown) including the optical disk drive device α, and a gap between the door 3 and the disk tray 4 is generated. X, or through a heat radiation hole (not shown) formed in the housing 1
The air flow had entered the inside of the housing 1. With the invasion of such an air flow, dust contained in the air flow adheres to the recording surface of the optical disk recording medium D and the objective lens of the optical pickup P, and finally the optical disk drive device α The recorded information is erroneously read, cannot be read correctly, or the tracking follow-up control operation cannot be performed. For this reason, a caddy type optical disk drive in which the optical disk recording medium D is once mounted in a disk storage cartridge called a caddy to prevent dust from adhering to the optical disk recording medium D and mounted in the optical disk drive device α. Although there are existing devices, the caddy type optical disk drive firstly requires a separate caddy, which increases the cost. Second, the optical disc drive needs a caddy opening drive mechanism. Thirdly, there is a drawback that the work of attaching and detaching the optical disk recording medium D to and from the caddy is complicated, and is not widely adopted at present. Here, the present invention provides a loading tray type optical disk drive capable of minimizing the adhesion of dust to an optical disk recording medium or an optical pickup. In order to solve the above-mentioned problems, the present invention employs the following new characteristic constitution means. That is, the feature of the present invention is that the optical disk recording medium can be detachably mounted on the upper surface, and the front surface of the housing and the inside of the housing can be pulled out and stored in the horizontal direction through the front opening of the housing. In a tray loading type optical disk drive device provided with a sliding disk tray, when the disk tray is housed inside the housing, the optical disk recording medium is placed on the disk from the top to the side. a cover for covering the lid-like between the tray and suction the cover from the lower side to the disc tray
An optical disc drive apparatus characterized by comprising a drive mechanism for wear biasing. An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a right side view showing a disk replacement state of the optical disk drive device of the present embodiment.
2A is a plan view of the cover, FIG. 2B is a front view of the cover, FIG. 3 is a right side view showing the disk storage state, and FIG. 4 is a right side view of the disk rotation state. FIG. In the figure, β is an optical disk drive, 10
Is a cover, and 11 is a solenoid. The same members as those in the conventional example are denoted by the same symbols. The optical disk drive β of this embodiment shown in FIGS. 1 to 4 has a housing 1, a front opening 2 penetrating through a part of the front of the housing 1, and a front opening 2. A door 3 that is pivotally supported so as to be openable and closable outward on the front surface of the housing 1
And the optical disk recording medium D is mounted detachably and exchangeably,
The front surface of the housing 1 and the housing 1 through the front opening 2
A disk tray 4 slidable on a guide rail (not shown) fixed to both sides of the inside of the housing 1 so as to be movable horizontally with respect to the inside, and a circuit board 5 serving as a control electric system fixed to the bottom of the inside of the housing 1 A mechanical unit 6 disposed just below the storage position of the disk tray 4 inside the housing 1 and serving as a drive mechanism for the optical disk recording medium D and the optical pickup P;
And a turntable 7 made of a metal material extending upward from the mechanical unit 6 and rotatably supporting a center hole of the optical disk recording medium D from below, and the optical disk recording medium D on the mechanical unit 6. An optical pickup P mounted movably in a radial direction, a pulley base 8 fixed to an inner top surface of the housing 1, and the pulley base 8
A chucking pulley 9 made of a magnetic material rotatably supported on the disk tray 4 and an optical disk recording medium D stored in the housing 1 while being mounted on the disk tray 4
Cover 10 made of a metal material covering from top to side
And a solenoid 11 fixed on the circuit board 5 with the magnetic poles facing the peripheral edge portion 10b of the cover 10. As shown in FIG. 2, the cover 10 is formed in a disk shape having a diameter smaller than that of the optical disc recording medium D, and a support mounting hole 10a for the chucking pulley 9 is formed at the center thereof. At the same time, the peripheral portion 10b is formed so as to be bent downward so as to cover the entire optical disk recording medium D. The loading operation in the optical disk drive β will be described with reference to the drawings. First, it is assumed that the optical disk drive device β is in the disk exchange state shown in FIG. The cover 10 is pulled up and attracted to the pulley base 8 by the magnetic force of the chucking pulley 9. The operator places the optical disc recording medium D on the disc tray 4. When the operator gives a loading instruction to the circuit board 5, the circuit board 5 drives a loading motor (not shown) to rotate in a normal direction, and the disk tray 4 moves on a guide rail (not shown) inside the housing 1 with the driving of the loading motor. , And is drawn into the housing 1 to enter the disk storage state shown in FIG. When the disk tray 4 is pulled into the housing 1, the circuit board 5 supplies a current to a solenoid for driving a mechanical unit (not shown), and raises the mechanical unit 6 to a position close to the reading surface of the optical disk recording medium D. Then, the chucking pulley 9 made of a magnetic material is attracted to the turntable 7 made of a metal material. As a result, the center hole of the optical disk recording medium D is sandwiched from above and below by the chucking pulley 9 and the turntable 7 provided on the upper surface of the mechanical unit 6, and the optical disk recording medium D is rotatably pivoted. Is done. Next, when the circuit board 5 is energized to the solenoid 11, the end of the cover 10 is attracted to the solenoid 11 by the strong magnetic force generated by the solenoid 11 and overcomes the magnetic force of the pulley base 8, and as shown in FIG. Suppression is applied to the tray 4. Finally, the circuit board 5 drives a spindle motor (not shown) to rotationally drive the optical disk recording medium D to read recorded information. Therefore, since the optical disk recording medium D and the optical pickup P are held in a substantially sealed state in the rotating space formed by the disk tray 4 and the cover 10, the intrusion of dust is almost completely prevented, and the optical pickup P Or to the optical disk recording medium D. Next, when the operator gives an ejection operation instruction to the circuit board 5, the circuit board 5 stops energizing the solenoid 11, and as a result, the cover 10 is again lifted to the pulley base 8 by the magnetic force of the chucking pulley 9. The suction operation is performed in the same manner as in the conventional optical disk drive device α. Thus, the cover 10 does not hinder the loading operation of the disc tray 4. The cover 10 may be made of a magnetic material only for a part necessary for the suction operation without using a magnetic material for the whole. Further, as in the above-described embodiment, the cover 1
Although the magnetic force of the solenoid 13 is used for the vertical drive of 0, other arbitrary driving means may be used instead. In this embodiment, the optical disk recording medium has been described as an example. However, the present invention may be applied to a magneto-optical disk recording medium. As described above, according to the optical disk drive of the present invention, it is possible to greatly reduce dust adhesion to an optical disk recording medium or an optical pickup while employing a loading tray system. There is. At the same time, there is an advantage that the life of the optical disk drive device is prolonged as a result of the reduction of the adhesion of dust to the optical pickup and its driving part. Further, by employing a metal material for the material of the cover, an electromagnetic shielding effect on the upper part of the mechanical unit is exhibited.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a right side view showing a disc replacement state of an optical disc drive device according to an embodiment of the present invention. FIG. 2A is a plan view of the above-described cover, and FIG. 2B is a front view of the same-cover. FIG. 3 is a right side view showing the disk storage state according to the first embodiment; FIG. 4 is a right side view showing the same disk rotating state. FIG. 5 is a right side view showing a disk replacement state of the conventional optical disk drive device. FIG. 6 is a right side view showing the disk storage state of the above. FIG. 7 is a right side view showing the same disk rotating state. [Description of Signs] α, β Optical disk drive device D Optical disk recording medium P Optical pickup X Gap 1 Housing 2 Front opening 3 Door 4 Disk tray 5 Circuit board 6 Mechanical unit 7 Turntable 8 Pulley base 9 Chucking pulley 10 Cover 11 Solenoid

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 17/022-17/035 G11B 17/04 G11B 33/02 G11B 33/14

Claims (1)

(57) [Claims 1] While an optical disk recording medium is detachably mounted on an upper surface, the front surface of the housing and the inside of the housing are leveled through a front opening of the housing. In a tray loading type optical disk drive device provided with a disk tray that slides freely in the direction of drawing, when the disk tray is housed inside the housing, the optical disk recording medium is placed on the side from the top. optical disc drive device comprising a cover for covering the cap-like, the said cover from the bottom side it has and a drive mechanism for urging adsorbed to the disc tray between the disc tray over the.