JPH042415Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an optical pickup device that adjusts the tangential skew and optical axis misalignment of CD and LD players.

[Technical background of the invention]

In an optical pick-up device, a pick-up is moved at regular intervals to the information recording surface of the disk, and the light emitted from the pick-up is directed to the information recording surface of the disk at a predetermined angle (angle in the radial direction and angle in the tangential direction of the disk). Must hit.

However, since the pick-up output optical axis has some variation with respect to the reference plane of the pick-up, more accurate information reading is performed by adjusting the irradiation angle.

Further, in the case of a three-beam tracking method, etc., it is necessary to adjust the positional relationship between the disk and the output optical axis in the direction perpendicular to the output optical axis direction and the feeding direction.

A conventional optical pickup device is shown in FIG. 4 and below. Figure 4 is a plan view, Figure 5 is a front view,
FIG. 6 is a left side view of FIG. 4, and FIG. 7 is an exploded perspective view of the moving table and pickup portion.

4 to 7, a spindle motor 1 is attached to a frame 3 by screws and wave washers 8. As shown in FIGS. A turntable 9 is attached to this spindle motor 1. A disk 10 is placed on a turntable 9.

On the other hand, 5a and 5b indicate a pair of shafts. Along this pair of shafts 5a, 5b, the moving platform 4
is fixed to the frame 3 so as to move parallel to the disk 10.

On the plane perpendicular to the moving direction of this moving table 4,
As is clear from the figure, the pick-up 2 is attached with screws and wave washers 7. At this time, a surface parallel to the output optical axis 2a of the pickup 2 is in close contact with a surface perpendicular to the moving direction of the moving table 4, and is positioned by the pin 6. Although not shown in the figure, the movable table 4 is driven by a drive mechanism.
It is adapted to move along shafts 5a and 5b.

Next, the operation will be explained. pick up 2
Since the moving table 4 can be fixed at any angle around the pin 6, the light emitted from the pick-up 2 is directed to the disk 1.
0 at a predetermined track tangent angle.

Further, since the spindle motor 1 can be displaced along the elongated hole of the frame 3, axial misalignment can be adjusted.
The pickup 2 moves together with the movable table 4 from the innermost circumference of the disk 10 to the outermost circumference while maintaining a constant distance from the disk 10.

[Problems with background technology]

However, in the above-mentioned conventional optical pickup device, the movable table 4 that supports the pickup 2 needs to have high precision and sufficient strength, which has the disadvantage that the movable parts are large.

Further, in order to adjust the inclination of the output optical axis 2a in the pick-up feeding direction (the inclination in the radial direction of the disk 10), a more complicated moving table is required, resulting in a large and expensive pick-up device.

[Purpose of invention]

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and to provide an optical pickup device that does not require a moving table, is small and inexpensive, and has a simple structure. With the goal.

[Summary of the idea]

In the optical pickup device of this invention, the carriage means is movable while maintaining a constant distance from the disk, and the carriage means is integrated with the spindle motor or a motor frame having a surface parallel to the axis of rotation is attached to the spindle motor. A sub-panel is attached to a fixed surface perpendicular to the pick-up feeding direction so as to be movable in a direction perpendicular to the feeding direction and the output optical axis of the pick-up, and this sub-panel is brought into contact with the motor frame to connect the output optical axis of the pick-up and the spindle. The rotation axis of the motor is adjusted to a predetermined angle.

[Example of idea]

Embodiments of the optical pickup device of this invention will be described below with reference to the drawings. FIG. 1 is a plan view of one embodiment, FIG. 2 is a front view, and FIG. 3 is an exploded perspective view of essential parts. In FIGS. 1 to 3, the same parts as in FIGS. 4 to 7 will be described with the same reference numerals.

The spindle motor 1 is attached to a motor frame 12, and the two together form a motor section. As is clear from FIG. 3, the motor frame 12 is formed in an "L" shape, and its vertical portion 12V has a plurality of pin holes 12a ₁ to 1.
2a ₃ is formed.

Corresponding to the pin holes 12a ₁ to 12a ₃ , pin holes 4a ₁ to 4a ₃ are formed in the sub-panel 4A, and guide pin holes 4b ₁ and 4b ₂ are formed near both ends of the sub-panel 4A. It is formed.

These guide pin holes 4b ₁ and 4b ₂ are for inserting the guide pin 11 shown in FIG. 2, and are elongated holes extending in the direction perpendicular to the pick-up moving direction and the output optical axis.

The motor frame 12 and the sub-panel 4A are positioned using pins 6.
That is, after inserting the pin 6 into the pin hole 12a ₁ of the motor frame 12 and the pin hole 4a ₁ of the sub-panel 4A and positioning them, the pin hole 4 of the sub-panel 4A is inserted with the screw and the wave washer 7.
a ₂ , 4a ₃ and the pin hole 12a ₂ of the motor frame 12,
12a ₃ has been concluded.

Further, as is clear from FIGS. 1 and 2, the pair of shafts 5a and 5b are fixed to the frame 3 constituting the carriage mechanism at a predetermined distance. A pair of guide pins 11 are attached to the front surface of the frame 3, that is, to a surface parallel to the axes of the shafts 5a and 5b.

Each of the pair of guide pins 11 is inserted into guide pin holes 4b ₁ and 4b ₂ of the sub-panel 4A to position the sub-panel 4A.

Due to this positioning, the sub-panel 4A to which the spindle motor 1 and motor frame 12 are attached is positioned perpendicularly to the axial direction of the shafts 5a and 5b, and the sub-panel 4A is fastened to the frame 3 by screws and wave washers 8. .

A pick-up 2 is supported by a pair of shafts 5a and 5b via bearings. pick up 2
The shafts 5a, 5 are driven by a drive mechanism (not shown).
It is designed to move in parallel along b.

Further, a turntable 9 is attached to the shaft of the spindle motor 1. On this turntable 9 is a disk 10 on which optical information is recorded.
is starting to be placed.

In addition, the sub-panel 4A includes figures 2 and 3.
As is clear from the figure, hole 4 for eccentric drive
c ₁ and 4c ₂ are formed.

Next, the operation of the optical pickup device of this invention constructed as described above will be explained. Since the motor frame 12 is fastened to the sub-panel 4A at an arbitrary angle around the pin 6, the hole 4 for the eccentric driver can be
The angle can be adjusted through c ₁ and 4c ₂ .

Furthermore, the sub-panel 4A has a pair of guide pins 11.
Because it can be linearly displaced in the left and right direction with respect to the frame 3, by using an eccentric driver etc.
The position of the sub-panel 4A with respect to the frame 3, that is, the position of the rotation axis of the disk 10, can be finely adjusted.

Thereby, by adjusting the angle between the motor frame 12 and the sub-panel 4A, the irradiation angle of the pick-up emitted light in the tangential direction of the disk 10 can be adjusted.

Furthermore, by adjusting the positional deviation (axis deviation) between the sub-panel 4A and the frame 3, the positional deviation between the disk rotation axis (that is, the axis of the spindle motor 1) and the output optical axis of the pickup 2 can be adjusted.

Further, the pickup 2 is moved from the innermost circumference to the outermost circumference of the disk 10 while maintaining a constant distance from the disk 10.

In addition, in the above embodiment, as is clear from FIG. 3, the spindle motor 1 and the motor frame 12
Although exemplified is a separate body, this need not be a separate body, and the spindle motor 1 itself may have a surface parallel to the rotation axis.

In addition, if the above-mentioned axis misalignment adjustment is not necessary, either completely fix the sub-panel 4A to the frame 3 (use two positioning pins for the guide pins, that is, make the elongated hole a round hole), or 4A
What is necessary is to integrate the frame 3 with the frame 3.

Furthermore, the pickup 2 may be provided with a mechanism for adjusting the inclination of the disk 10 in the radial direction without providing a bearing. In this case as well, the optical pickup device of this invention can be used as is.

[Effect of idea]

As described above, according to the optical pick-up device of this invention, the pick-up can be moved while maintaining a constant distance with respect to the disk by the carriage means, and the pick-up can be integrated with the spindle motor or has a surface parallel to the rotation axis of the spindle motor. A sub-panel is attached to a fixed surface perpendicular to the pick-up feeding direction of the carriage means so as to be movable in a direction perpendicular to this feeding direction and an output optical axis of the pick-up, and this sub-panel is brought into contact with the motor frame. Since the output optical axis of the pickup and the rotation axis of the spindle motor are adjusted to a predetermined angle, a movable table having an adjustment mechanism on the side of the pickup, which is a movable part, is not required, and the device can be made small and inexpensive.

Furthermore, even if a radial tilt adjustment mechanism is required, the structure is simple because the pickup only needs to be tilted in one direction.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the optical pick-up device of this invention, Fig. 2 is a front view of the same optical pick-up device, and Fig. 3 is an exploded view of the motor frame and sub-panel of the same optical pick-up device. 4 is a plan view of a conventional optical pickup device, FIG. 5 is a front view of a conventional optical pickup device, FIG. 6 is a left side view of FIG. 4, and FIG. 7 is a conventional optical pickup device. FIG. 2 is an exploded perspective view of the movable table and the pickup in the pickup device. 1...Spindle motor, 2...Pickup, 3...Frame, 4...Sub panel, 5a,
5b...Shaft, 6...Pin, 7, 8...Screw and wave washer, 9...Turntable, 1
0...Disc, 11...Guide pin, 12...
motor frame.

Claims (1)

[Scope of utility model registration request] A spindle motor that rotates a disk on which optical information is recorded, a pick-up that reads the information recorded on this disk, a carriage means that moves this pick-up while maintaining a constant distance with respect to the disk, and a spindle motor that is integrated with or integrated with the spindle motor. A motor frame fixed to the spindle motor and having a surface parallel to the rotational axis of the spindle motor and a fixed surface perpendicular to the feed direction of the pick-up of the carriage means move in a direction perpendicular to the feed direction and the output optical axis of the pick-up. An optical pick-up device comprising a support member that is mounted in contact with the motor frame while being guided so as to be able to adjust the output optical axis of the pick-up and the rotation axis of the spindle motor to a predetermined angle.