JPH11185339A - Optical disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize the driving force of a spindle motor as the driving force of the mechanism such as a loading mechanism, etc., by taking out the driving force of the spindle motor at the inner/outer circumferences whereon an optical pickup is positioned. SOLUTION: When the optical pickup 2 is moved to the inner circumference from the read-in area of the optical disk 11, a working member 12 is moved to the direction of the turntable 10 by an engaging part 2d of the optical pickup 2 to make a gear part 14a of a connecting gear 14, which is rotationally held on the working member 12, to the state engaged with a gear part 10a integrally formed on the turntable 10, then the rotation driving force of the spindle motor 9 is taken out as the driving force of the loading mechanism, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk drive which utilizes a driving force of a motor constituting a traverse mechanism of an optical disk for a driving force of a loading mechanism and the like.

[0002]

2. Description of the Related Art Generally, a traverse mechanism of an optical disk device is constituted by a spindle motor for driving an optical disk to rotate at a predetermined rotational speed and a feed motor for moving an optical pickup in a radial direction of the optical disk. As a mechanism for taking out the driving force of these motors as a driving force of a loading mechanism or the like, a mechanism described in, for example, JP-A-6-274993 is conventionally known.

[0003]

However, in the conventional mechanism described in Japanese Patent Application Laid-Open No. Hei 6-274993, the loading motor can be eliminated, but a lifting motor for driving the lifting base on which the traverse mechanism is mounted is required separately. However, there have been problems such as an increase in the number of parts due to an increase in cost and an increase in the complexity of the mechanism, and an increase in the number of assembly steps.

The present invention has been made to solve the above-mentioned problem, and the drive force of the spindle motor of the traverse mechanism can be taken out, for example, as a drive source of an optical disk loading mechanism, in addition to the rotational drive of the optical disk, thereby reducing the cost. It is intended to realize a reduction in the number of parts, the number of parts, and the number of assembly steps.

[0005]

In order to solve the above-mentioned problems, an optical disk drive according to the present invention is characterized in that when the optical pickup moves to the innermost or outermost position of the optical disk by driving a feed motor, the position of the optical pickup is changed. At the same time, the drive of the feed motor is stopped by the detecting means for detecting the movement of the optical pickup, that is, the moving operation of the optical pickup is stopped. It is configured to be in a meshing position with the formed gear portion.

The engagement between the coupling gear and the gear portion of the turntable is performed at a position where the laser beam position of the optical pickup reaches an inner periphery from a lead-in area or an outer periphery from a lead-out area of the optical disk. The position of the detection means and the displacement timing of the operating member are set.

[0007] Further, in accordance with the operation of the detecting means by the optical pickup, the voltage applied to the spindle motor for driving the turntable to rotate can be switched.

[0008]

An optical disk drive according to a first aspect of the present invention includes a detecting means for detecting the innermost or outermost position of the optical disk of the optical pickup, and contacting the optical pickup immediately before the detection position. And a connecting gear disposed on the operating member, wherein the movement of the optical pickup is stopped by the operation of the detecting means, and at the same time the displacement of the operating member accompanying the moving operation of the optical pickup. The coupling gear is configured to be in a meshing position with a gear portion integrally formed on a turntable, and the driving force of the spindle motor that rotationally drives the optical disc by the above-described configuration is reduced by the turning force. The gear is formed integrally with the table and the coupling gear is engaged with the gear, and the gear is taken out. It has the effect that used in the purpose.

In the optical disk drive according to the second aspect of the present invention, the engagement between the coupling gear and the gear portion of the turntable is such that the position of the laser beam of the optical pickup is more than the inner circumference or the lead-out area of the optical disk from the lead-in area. The position of the detection means and the displacement timing of the operating member are set so as to be performed at a position reaching the outer periphery, and the above-described configuration affects normal optical disk reading and writing operations. This has the effect of realizing a mechanism with high operation reliability.

According to a third aspect of the present invention, there is provided an optical disk drive device wherein a voltage applied to a spindle motor for rotating and driving a turntable can be switched in accordance with an operation of a detecting means. With the above configuration, when the driving force of the spindle motor is used for a purpose other than the rotation operation of the optical disk, the driving force can be set to a driving force according to the purpose of use.

The optical disk drive of the present invention is a mechanism configured as described above, wherein the mechanism that uses the driving force of the spindle motor for purposes other than the rotation of the optical disk is configured with a very small number of parts. In addition, it is possible to provide a mechanism that realizes low cost, reduction in the number of assembly steps, high operation reliability, and easy implementation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. (Embodiment) FIGS. 1 to 4 show a normal operation of an optical disk drive according to an embodiment of the present invention.
FIG. 2 is a plan view showing a state where the optical pickup is located in an inner periphery lead-in area of the optical disk, FIG. 2 is a partial side view thereof, FIG. 3 is a plan view showing a state where the optical pickup is located in an outer periphery lead-out area of the optical disk, and FIG. It is the partial side view.

1 to 4, 1 is a traverse chassis, 2 is an optical pickup, 3 is a drive shaft, 4 is a drive gear, 5 is a thrust spring, 6 is a nut plate, and the drive shaft 3 is an optical pickup 2 Bearings 2a, 2
b, one end 3a is rotatably held in a bearing hole 1a formed on the traverse chassis 1, and the other end 3b is press-fitted into the drive gear 4 to hold the drive gear 4. The portion 4a is rotatably held by a bearing portion 1b on the traverse chassis 1. The guide 2c of the optical pickup 2 is engaged with the sub shaft 1c on the traverse chassis 1 and is slidable in the direction of the arrow AB. Also,
The thrust spring 5 is a fixed part 1d on the traverse chassis 1.
And the front end 4b of the drive gear 4 and the shaft 4
a, and presses the drive shaft 3 through the drive gear 4 in the directions of arrows A and D. The nut plate 6 is fixed to the optical pickup 2, and the protrusion 6 a is engaged with the worm 3 c of the drive shaft 3. Reference numeral 7 denotes a traverse motor, and 8 denotes a motor gear. The traverse motor 7 is fixed on the traverse chassis 1, and its rotating shaft 7 a is pressed into the motor gear 8 to hold the motor gear 8.
The motor gear 8 is meshed with the drive gear 4 and transmits the torque of the traverse motor 7 to the drive shaft 3. Reference numeral 9 denotes a spindle motor, and 10 denotes a turntable. The spindle motor 9 is fixed on the traverse chassis 1, and its rotary shaft 9a is pressed into the turntable 10 on which the optical disk 11 is mounted, and holds the turntable 10. .

In such a configuration, when the traverse motor 7 is rotated clockwise or counterclockwise, the rotational force is transmitted to the optical pickup 2 via the drive gear 4, the drive shaft 3, and the nut plate 6, and the optical pickup 2 is rotated. Indicates the direction of arrow A or the direction of arrow B,
In the radial direction, the inner circumferential position shown in FIGS.
It moves between the outer peripheral positions shown in FIG. Further, when the spindle motor 9 is rotated in a certain direction, the optical disk 11 mounted on the turntable 10 also rotates integrally. The rotation of the optical disk 11 and the movement of the optical pickup 2 are performed as described above. When the optical disc 11 is placed on the turntable 10 and the spindle motor 9 is rotated, an attracting action of a magnet (not shown) is used to hold the optical disc 11 and the turntable 10 so as not to cause a slip. Clamped.

Incidentally, 12 is an operating member, 13 is a spring, 14 is a connecting gear, and 15 is a relay gear. The operating member 12 is slidable in the thrust direction, that is, in the direction of arrow CD with the rotation shaft 9a of the spindle motor 9 as a support shaft, and is always urged by the spring 13 in the direction of arrow D.
The stopper portion 12a is held in a state of being in contact with the upper surface of the traverse chassis 1. The shaft portion 12b of the operating member 12 penetrates through the guide hole 1e of the traverse chassis 1 to prevent the operating member 12 from rotating around the rotating shaft 9a of the spindle motor 9. Also, the operating member 1
Reference numeral 2 has an inclined portion 12c which engages with the engaging portion 2d of the optical pickup 2 when the optical pickup 2 moves from the lead-in area of the optical disk 11 to the inner periphery. Connecting gear 1
4 is rotatably held on a rotating shaft 12d formed on the operating member 12, and when the operating member 12 moves in the direction of arrow C, a gear portion 14a is formed integrally with the turntable 10. They are in a position where they can be engaged. The relay gear 15 is rotatably held by a rotating shaft 1f formed on the traverse chassis 1, and the gear portion 15a is always meshed with the gear portion 14b of the connection gear 14.

In the traverse mechanism configured as described above, the driving force of the spindle motor 9 will be described below.
A mechanism for taking out for a purpose other than the rotation drive 1 will be described. FIGS. 5 to 7 are diagrams showing an operation of extracting the driving force of the spindle motor 9 of the optical disk drive according to the embodiment of the present invention. FIG. 5 shows a state where the optical pickup 2 is moving from the optical disk lead-in area to the inner circumference. FIG. 6 is a plan view showing a meshing state between the gear portion 10a of the turntable 10 and the connecting gear 14, and FIG. 7 is a partial side view thereof.

When the normal optical disk reading and writing operations are completed, the optical pickup 2 moves to the inner peripheral lead-in area and enters a standby state. In this state, the traverse motor 7 is driven by, for example, turning on a loading switch to move the optical pickup 2 further inward than the lead-in area of the optical disk 11. When the optical pickup 2 moves in the inner circumferential direction, as shown in FIG.
Abuts against the inclined portion 12c of the operating member 12, and presses the operating member 12 about the rotation shaft 9a of the spindle motor 9 as a support shaft, and starts moving in the direction of arrow C against the urging force of the spring 13. When the optical pickup 2 further moves in the inner circumferential direction, the contact portion 2e of the optical pickup 2 engages with the detection switch 16 fixed on the traverse chassis 1, and
When the detection switch 16 detects a change from the open state to the closed state, the supply of the voltage to the traverse motor 7 is stopped. That is, the moving operation of the optical pickup 2 is stopped. At this time, the operating member 12 is connected to the connecting gear 1 as shown in FIGS.
4 is the gear portion 10a of the turntable 10.
It has moved to the position where it is in mesh with. If the spindle motor 9 is driven in this state, the driving force of the relay gear 1 is always in mesh with the turntable 10, the connecting gear 14, and the connecting gear 14 regardless of the position of the connecting gear 14.
5 is transmitted. By arranging the rack 17 connected to the gear portion 15b of the relay gear 15 on the traverse chassis 1, the rotational force of the spindle motor 9 in the clockwise direction is indicated by the arrow E, and the rotational force in the counterclockwise direction is indicated by the arrow F. Can be converted to linear motion in the direction. Here, by connecting the rack 17 to a tray (not shown) on which the optical disk 11 is placed, a reciprocating operation between the discharge position of the optical disk 11 and the playing position can be performed. The above series of operations is an operation in which the position of the optical pickup 2 is performed on the inner periphery of the lead-in area of the optical disk 11 as described above, and therefore does not affect the normal optical disk reading operation or writing operation at all. Further, by switching the applied voltage of the spindle motor 9 in conjunction with the operation of the detection switch 16, the driving force required for the loading operation can be set to an optimum value.

[0018]

The optical disk drive of the present invention is a mechanism configured as described above, wherein the mechanism that uses the driving force of the spindle motor for purposes other than the rotation of the optical disk is configured with a very small number of components. As a result, it is possible to provide a mechanism that realizes a reduction in cost and a reduction in the number of assembly steps, has a high operation reliability, and is easy to realize.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state where an optical pickup is located in an inner circumference lead-in area of an optical disc in an embodiment of the present invention.

FIG. 2 is a partial side view showing a state where the optical pickup is located in an inner circumference lead-in area of the optical disc.

FIG. 3 is a plan view showing a state in which the optical pickup is located in an optical disk outer peripheral lead-out area.

FIG. 4 is a partial side view showing a state where the optical pickup is located in an optical disk outer peripheral lead-out area.

FIG. 5 is a partial side view showing a state in which the optical pickup is moving from the optical disk lead-in area to the inner circumference.

FIG. 6 is a plan view showing a meshing state of a gear portion and a connection gear of the turntable.

FIG. 7 is a partial side view showing a meshing state of a gear portion and a connection gear of the turntable.

[Explanation of symbols]

 Reference Signs List 2 optical pickup 2e contact part 9 spindle motor 10 turntable 10a gear part 11 optical disk 12 operating member 14 connecting gear 16 detection switch

Claims (3)

[Claims] A detecting means for detecting the innermost or outermost position of the optical disk of the optical pickup; an operating member which is displaced by coming into contact with the optical pickup immediately before the detecting position; and a connection disposed on the operating member. A gear, wherein the movement of the optical pickup is stopped by the operation of the detecting means, and at the same time, the connecting gear meshes with a gear unit integrally formed on the turntable due to the displacement of the operating member accompanying the movement of the optical pickup. An optical disk drive characterized in that the optical disk drive is configured to be located at a position. 2. The position of the detecting means such that the engagement of the coupling gear and the gear portion of the turntable is performed at a position where the laser beam position of the optical pickup reaches the inner periphery from the lead-in area or the outer periphery from the lead-out area of the optical disk. 2. The optical disk drive according to claim 1, wherein a displacement timing of the operating member is set. 3. The optical disk drive according to claim 1, wherein a voltage applied to a spindle motor for rotating and driving the turntable can be switched in accordance with an operation of the detection means.