JP2002312955A - Disk unit - Google Patents

Abstract

(57) [Problem] In a conventional disk drive, a spindle motor and an optical head are integrally separated from a disk transport path during disk transport, so that the spindle motor and the optical head are thinned to the same thickness. However, since the height of the hub portion of the spindle motor is always added to the height of the optical head, it has been difficult to reduce the thickness to a certain level or more. SOLUTION: When the traverse base is retracted from the disk transport path, the optical head on the traverse base is retracted with a shorter moving distance than the spindle motor on the traverse base, so that space can be used effectively and The thickness can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for recording or reproducing a disk-shaped recording medium such as a CD and a DVD, and more particularly to a thin disk device.

[0002]

2. Description of the Related Art In a conventional disk drive, a disk is inserted into and ejected from the disk drive by placing the disk on a tray which performs a reciprocating slide operation or by pressing a rotating roller against the disk. Done,
The disk is transported on one plane. During the transport operation of the disk, the traverse base (movable base assembly) transports the disk while integrally supporting the spindle motor (turntable motor) and the optical head (optical head). Retracting downward to leave the path, the clamper retracts to the information on this disk transport path, and when the transport of the disk is completed, the traverse base is approached to the disk and placed on the turntable surface of the spindle motor. The mainstream method is to mount a disk, fix it with a clamper, and record or read information on the disk with an optical head while rotating the disk. A disk device having such a function is disclosed in JP-A-7-282513. On the other hand, thinning of these disk devices for notebook PCs and portable devices is desired, and in the disk devices having the above-described configuration, main devices such as a spindle motor and an optical head that determine a space height below a disk transport path. Are becoming thinner.

[0003]

However, in the disk device having the above-described structure, even if the spindle motor and the optical head are thinned to the same thickness, the disk positioning protruding from the turntable surface of the spindle motor is required. Since the height of the hub is always added to the height of the optical head, it is difficult to reduce the thickness of the hub to a certain level or more.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk device which solves the above-mentioned problems, makes effective use of the space height below the disk transport path without waste, and facilitates thickness reduction.

[0005]

In order to achieve the above object, a disk drive according to the present invention comprises a spindle motor for rotating a disk, an optical head for recording information on the disk and reading information from the disk, and A guide shaft for supporting the optical head movably in the radial direction of the disk, a guide shaft movable support for supporting the guide shaft movably in a direction perpendicular to the disk surface, the spindle motor, the optical head, and the guide shaft And a traverse base that supports the guide shaft movable support portion and moves between a standby position where recording or reading operation is performed by the optical head and a retreat position where the disk is separated from the transport path of the disk when the disk is inserted into or ejected from the apparatus. The traverse base is moved from a standby position to a retracted position. It is characterized in that the de or contact the guide shaft and the indirect or direct with a contact portion to stop the movement of the optical head.

Further, in the disk device described above, the elastic member for urging the guide shaft in a direction away from the disk in the guide shaft movable support portion, and the urging force of the elastic member for adjusting the position of the guide shaft at the standby position of the traverse base. The guide shaft is separated from the setting portion when the traverse base is in the retracted position.

In the above-described disk device, the end of the guide shaft is adjusted in a direction perpendicular to the disk surface in the guide shaft movable support portion, so that the tilt of the optical head with respect to the disk when the traverse base is in the standby position or It is characterized in that the distance can be adjusted.

In the disk device described above, the elastic member for urging the guide shaft in a direction away from the disk at the guide shaft movable support portion, and the urging force of the elastic member for adjusting the position of the guide shaft at the standby position of the traverse base. A movable setting portion that can be adjusted while preventing movement, and the guide shaft is separated from the movable setting portion when the traverse base is in the retracted position.

In the above-mentioned disk device, the difference between the retracting movement distance of the traverse base and the retracting movement distance of the optical head is the same as or slightly smaller than the height of the hub projecting from the turntable surface at the center of the spindle motor. It is a feature.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a perspective view of a main part showing an outline of the disk device in the present embodiment. FIG. 1 is a partially sectional side view showing details and operation of FIG. 2, and FIG. It is the partial cross section side view which carried out cross section.

1, 2 and 3, reference numeral 91 denotes a top plate, and 92 denotes a bottom plate. The top plate 91 and the bottom plate 92 constitute a casing 90 (not shown) which forms the outer shape of the disk drive. . 10 has a center hole 10w and a recording surface 10r
, A disk transport roller, and 12 an auxiliary transport roller, which sandwiches the disk 10 inserted into the apparatus main body from the right side of the figure by the operator with the disk transport roller 11 and the auxiliary transport roller 12, and transports the disk. By rotating the rollers 11, the disk 10
Is inserted in the direction of the arrow 10A parallel to the disk surface, or discharged in the opposite direction. 20 is a recording surface 10r of the disk 10.
Optical heads 21 and 22 for recording information and reading and reproducing information from the recording surface 10r of the disk 10
Is a guide shaft for supporting the optical head 20 so that it can be moved in the radial direction of the disk 10 by means not shown,
Reference numeral 30 denotes a spindle motor, which has a turntable surface 30p on which the disk 10 is mounted and a center hole 10
It has a hub 30h positioned at w.

Reference numeral 80 denotes a clamper for holding the disk 10 between the turntable surface 30p of the spindle motor 30 and a clamper 81. The clamper support arm 81 rotatably supports the clamper 80 at a tip 81t. When the opposite end 81e is lifted in the direction of arrow 20A by means (not shown), the clamper 80 is brought into contact with the turntable surface 30p via the disc 10, and the clamper support arm 81 itself has a spring property. Press 80 against disc 10 with sufficient force.
A traverse base 40 supports and fixes the spindle motor 30 with a plurality of bosses 40b. The traverse base 40 can also move the guide shafts 21 and 22 together with the optical head 20 in a direction perpendicular to the recording surface 10r of the disk 10. I support it. Since the method of supporting the traverse base 40 is the same for the guide shaft 21 and the guide shaft 22, only the guide shaft 21 will be described below with reference to FIGS.

The inner end 21i of the guide shaft 21 is connected to the substrate 30 of the spindle motor 30 as shown in FIG.
20A or 2A by the setting portion 41i fixed to
It is movably supported in the 0B direction. Furthermore, a coil spring 6
1i (elastic body) urges the disk 10 away from the disk 10 (the direction of the arrow 20B), so that the end 21i of the guide shaft 21 is pressed against the setting portion 41i. Thus, when the traverse base 40 is in the standby position shown in FIG. 1A, that is, in the state where the recording or reading operation is being performed by the optical head 20, the end 21i of the guide shaft comes into contact with the setting portion 41i and Is fixed to a fixed distance. Thus, the coil spring 61i and the setting portion 41i
Thus, a guide shaft movable support portion 141 that supports the end portion 21i of the guide shaft so as to be movable in a direction perpendicular to the disk surface is configured.

An outer peripheral end 21e of the guide shaft 21 is provided.
As shown in FIG. 3A, arrows 20A or 20B are provided by guides 41e fixed to the traverse base 40.
In a direction away from the disk 10 by a coil spring 71 (elastic body) (arrow 20B).
Direction). On the outer peripheral side of the disk of the traverse base 40, an adjusting screw (movable regulating portion) 51 that can adjust the position of the end 21e of the guide shaft while resisting the urging force of the coil spring 71 is provided. Thus, when the traverse base 40 is at the standby position shown in FIG. 1A, the end 21e of the guide shaft comes into contact with the adjusting screw 51 and is fixed at a fixed position. As described above, the coil spring 71 and the adjusting screw 51 constitute the guide shaft movable support portion 151 that supports the end portion 21e of the guide shaft so as to be movable in a direction perpendicular to the disk surface. This guide shaft movable support portion 15
1, by adjusting the adjusting screw 51 in the manufacturing process of the disk device, the guide shaft 2 (not shown) is adjusted.
2 together with the adjustment process at the end on the outer peripheral side of the disc,
The inclination or distance of the optical head 20 with respect to the disk 10 when the traverse base 40 is at the standby position is adjusted.

The operation of the disk drive of the present invention having the above configuration will be described with reference to FIG. Here, FIG. 1A shows the traverse base 40 in the standby position, that is, the state where the recording or reading operation is performed by the optical head 20 as described above, and FIG. 3 shows a retracted position evacuated from the transport path, that is, a state in which a disk is being inserted into or ejected from the disk device. In the process in which the traverse base 40 descends from the standby position in the direction of the arrow 20 </ b> B to the retracted position, the end portion 21 of the guide shaft 21 comes before the bottom surface of the optical head 20 comes into contact with the apparatus main body (bottom plate 92).
i comes into contact with a contact portion 92i which is a part of the apparatus main body (bottom plate 92). Therefore, even if the traverse base 40 continues to descend further after this, the end 21i of the guide shaft 21 stops while being fixed at a fixed position. End 21 of guide shaft 21
In the same manner, the optical head 2 contacts the contact portion 92e.
0 is fixed to a fixed position without contacting the apparatus main body (bottom plate 92) and stops.

In this way, the spindle motor 30 is retracted together with the traverse base 40 until the tip of the hub 30h is separated from the disk 10 by a certain distance. At this time, the retracting movement of the optical head 20 is longer than the distance the spindle motor 40 has retracted. The smaller the distance is, the lower the regulation. At this time, at the same time, the end 81e of the clamper arm 81 is pulled down in the direction of the arrow 20B by means not shown to separate the clamper 80 from the disk 10 by a predetermined distance.

When the traverse base 40 is in the standby position, as shown in FIG.
Reference numeral 2 indicates that the traverse base 40 is moved to the retracted position, and at the same time, as shown in FIG. The retracting movement distance of the traverse base 40 and the spindle motor 30 is the optical head 2
0, but the value of the difference between them is the same as or slightly smaller than the height of the hub 30h of the spindle motor 30, so that the optical head 20
The tip of the hub 30h does not protrude from the tip of 0h, and the tip of the hub 30h always exists closest to the surface of the disk 10 on the traverse base 40.

As described above, in the disk drive of the present invention, the abutment portions 92i and 92e restrict the retractable travel distance of the optical head 20 to be smaller than the retractable travel distance of the spindle motor 30 during transport of the disk. While the spindle motor 30 having the hub 30h is reliably retracted from the disk transport path, the retractable movement distance of the thick optical head can be minimized.
Thus, the thickness of the device can be reduced.

[0019]

As described above, in the disk drive according to the present invention, when inserting and ejecting the disk, the traverse base is retracted from the disk transport path and the hub end of the spindle motor is separated from the disk surface. By using a configuration in which the optical head on the base is retracted with a shorter moving distance than the retracting movement distance of the traverse base and the spindle motor, space can be used effectively and the device can be made thinner. And DVD
In a disk device which originally requires a guide shaft movable support portion for adjusting the inclination or the distance of the optical head with respect to the disk surface as described above, it is possible to reduce the thickness without particularly adding new components.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a configuration of a disk device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the general outline of the disk device according to the embodiment of the present invention;

FIG. 3 is a partial cross-sectional side view showing a part of a disk device according to an embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Disc 20 Optical head 21, 22 Guide shaft 30 Spindle motor 30p Turntable surface 30h Hub 40 Traverse base 41i Setting part 51 Adjusting screw (movable setting part) 61i, 61e Coil spring (elastic body) 92i, 92e Contact part 141, 151 Guide shaft movable support

Continuation of the front page (72) Inventor Teruyuki Takizawa 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D117 AA02 CC07 JJ12

Claims (5)

[Claims] 1. A spindle motor for rotating a disk, an optical head for recording information on the disk and reading information from the disk, a guide shaft for supporting the optical head movably in a radial direction of the disk, and the guide shaft. A guide shaft movable support portion for supporting the spindle motor, the optical head, the guide shaft and the guide shaft movable support portion so as to be movable in a direction perpendicular to the disk surface, and a recording or reading operation by the optical head. A traverse base that moves between a standby position where the disc is inserted into the device and a retract position that separates from the transport path of the disc when the disc is inserted into and ejected from the apparatus; and a traverse base that is provided in the housing and moves from the standby position to the retract position. Moving the optical head in indirect or direct contact with the optical head or the guide shaft during the operation. Disk apparatus having a contact portion to stop. A guide shaft movable support portion for biasing the guide shaft in a direction away from the disk, and for regulating the position of the guide shaft at a standby position of the traverse base against the biasing force of the elastic body; 2. The disk device according to claim 1, further comprising: a setting portion configured to move the guide shaft away from the setting portion when the traverse base is at the retracted position. 3. A structure in which the guide shaft movable support portion can adjust the inclination or distance of the optical head with respect to the disk when the traverse base is at the standby position by adjusting the end of the guide shaft in a direction perpendicular to the disk surface. 2. The disk device according to claim 1, wherein: 4. The guide shaft movable support portion adjusts the position of the guide shaft at a standby position of the traverse base while biasing the guide shaft in a direction away from the disk while resisting the biasing force of the elastic member. 4. The disk device according to claim 3, further comprising a movable setting portion, wherein the guide shaft is separated from the movable setting portion when the traverse base is in the retracted position. 5. The apparatus according to claim 1, wherein the difference between the retracting movement distance of the spindle motor and the retracting movement distance of the optical head is equal to or slightly smaller than the height of a hub protruding from the turntable surface at the center of the spindle motor. The disk device according to any one of claims 1 to 4.