JPH10239577A - Mobile operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a slide mechanism part without exciting it. SOLUTION: A shaft 1 is provided with a groove 1A and a groove 1B perpendicularly to the axial direction. The groove 1A and the groove 1B are formed into a V-shape on the first face 1a and the second face 1b, and the third face 1c and the fourth face 1d, respectively. The angle between the second face 1b and the axial direction of the shaft 1 is made smaller, than the angle between the first face 1a and the axial direction, and the angle between the third face 1c and the axial direction is made smaller than the angle between the fourth face 1d and the axial direction. This slide mechanism part 5 holds a spherical body 2 with a spherical body hold section 4, and it is moved along the shaft 1 while the spherical body 2 is pressed to the shaft 1 by a spring 3. When the spherical body 2 is coupled in the groove 1A or groove 1B, the slide mechanism part 5 is positioned and maintained at its position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a moving operation device for moving a moving body along a shaft.

[0002]

2. Description of the Related Art There has been provided a linear movement operation device comprising a shaft and a moving body moved along the shaft. This moving operation device moves a load to be moved to a predetermined position along a shaft while holding the load to be moved, and maintains the moving body at that position. As a driving source of such a moving operation device, a driving mechanism including a coil and a magnet is used. Here, in order to maintain the position of the moving body, one end of the moving body is pressed against a fixed stopper.

[0003]

However, the above-mentioned conventional mobile operation device has the following problems and has been required to be improved.

When the load reaches a predetermined position, the moving body holding the load is mechanically stopped by contacting the stopper. At the time of the stop, an impact is applied to the moving body and the stopper, so that the life of the moving body and the stopper is shortened.

Further, the position of the load is maintained by pressing the moving body holding the load against a stopper by a driving mechanism including a coil and a magnet. For this reason, it is necessary to continue energization as long as the position of the load is maintained, resulting in an increase in power consumption.

[0006] Further, when the current is continuously supplied to the coil, the coil generates heat. Accordingly, the heat generated from the coil is transmitted to the surroundings, causing the lens and the holding member to expand, thereby deteriorating the positional accuracy of the moving operation device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has been described in view of the fact that a moving body does not contact a stopper and does not require continuous energization to maintain a position. It is an object of the present invention to provide a moving operation device for positioning and holding a body.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a moving operation device according to the present invention has a high magnetic permeability having at least one groove formed in a direction substantially perpendicular to the axial direction. A shaft formed of a material, a yoke formed of a material having high magnetic permeability formed in a U-shape and having opposite ends joined to both ends of the shaft, and a yoke attached to the yoke. A magnetic circuit composed of a magnet, and a movable body that is movable along the shaft, and is supported by the shaft and has a drive coil attached thereto.
A sphere supported by the moving body and pressed against the shaft.

In the moving operation device, a lens is attached to the moving body, and the lens is moved.

Further, in the moving operation device, the groove may be
A first surface that forms a first angle with respect to the axial direction of the shaft, and a second surface that is smaller than the first angle with respect to the axial direction.
Is formed in a V-shape with the second surface having the angle of.

When the moving body is moved from the second surface side to the first surface side,
A stopper is provided for stopping the moving body by contacting the moving body with the sphere being on the first surface.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a moving operation device according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the moving operation device has a substantially cylindrical shaft 1 and a slide mechanism 5 movable along the shaft 1 and supported by the shaft 1. It is composed.

The shaft 1 is formed of a material having high magnetic permeability, and has a V-shaped first surface 1a and a second surface 1b in a direction substantially perpendicular to the axial direction of the shaft 1. 1A and a V-shaped second groove 1B composed of a third surface 1c and a fourth surface 1d. The first groove 1A and the second groove 1B are formed on one end and the other end of the shaft 1 in parallel with a distance L therebetween.

The first surface 1a is a slope forming a first angle with respect to the axial direction of the shaft 1. Here, the first angle is, for example, about 60 ° to 80 °.
The second surface 1b is a slope that forms a second angle with respect to the axial direction of the shaft 1. Here, the second angle is smaller than the first angle, for example, about 10 ° to 30 °, and 10 ° is illustrated in the drawing.

The first surface 1a holds the sphere 2 so that the sphere 2 fitted in the first groove 1A does not move to one end side from the first surface 1a. The second surface 1b is the first surface
The ball 2 fitted in the groove 1A is held so as not to move toward the center of the shaft 1, but when a force exceeding a threshold value is applied, the ball 2 rides over the second surface 1b and
Move to the center side of. Conversely, the sphere 2 has a groove portion 1M.
To the left of the figure along the second surface 1b.
It is dropped until it touches a. And the sphere 2
Is held in contact with both the first surface 1a and the second surface 1b. The sphere 2 held in this way
Are accurately positioned.

As described above, the first groove 1A composed of the first surface 1a and the second surface 1b is connected to the slide mechanism 5
By combining with the spherical body 2, the function of the positioning part and the holding part is exhibited. That is, the first groove 1A holds the slide mechanism 5 so as not to move to one end, and determines whether or not the force applied to the center of the slide mechanism 5 exceeds a threshold value. The slide mechanism 5 is held in a state where it can be selected whether or not to move it to the center. As shown in FIG. 2, this first groove 1
The bottom of the cross section of A is straight. In addition, FIG.
FIG. 1 is a cross-sectional view indicated by a dashed line in FIG.

The third surface 1c is a slope that forms a second angle with respect to the axial direction of the shaft 1. Here, as described above, the second angle is smaller than the first angle described below, for example, about 10 ° to 30 °, and 20 ° is illustrated in the drawing. The fourth surface 1d is a slope that forms a first angle with respect to the axial direction of the shaft 1.
Here, the first angle is, for example, about 60 ° to 80 °, and 70 ° is illustrated in the drawing.

The third surface 1c holds the sphere 2 fitted in the second groove 1B so as not to move toward the center of the shaft 1. When a force exceeding a threshold value is applied, the sphere 2 becomes the third surface. And moves toward the center of the shaft 1. The fourth surface 1d holds the sphere 2 so that the sphere 2 fitted into the second groove 1B does not move to the other end side from the fourth surface 1d. Conversely, the sphere 2 is dropped from the inter-groove portion 1M along the third surface 1c to the other end until it comes into contact with the fourth surface 1d. The sphere 2 is connected to the third surface 1
It is held by contacting both the c and the fourth surface 1d. The sphere 2 thus held is positioned with high accuracy.

As described above, the second groove 1B composed of the third surface 1c and the fourth surface 1d is connected to the slide mechanism 5
By combining with the spherical body 2, the function of the positioning part and the holding part is exhibited. That is, the second groove 1B holds the slide mechanism 5 so as not to move to the other end side of the shaft 1, and determines whether the force applied to the slide mechanism 5 to the center of the shaft 1 exceeds the threshold value. Depending on whether or not the slide mechanism 5 is moved toward the center, the slide mechanism 5 is held in a selectable state.

The slide mechanism 5 includes the shaft 1
A sphere 2, a spring 3 for pressing the sphere 2 against the shaft 1, and a sphere holding part 4 for holding the sphere 2 are provided. The slide mechanism 5 slides along the shaft 1 from the first groove 1A to the second groove 1B along the groove 1M, and is attached to the slide mechanism 5. The load can be moved. As described above, in the first groove 1A and the second groove 1B, the positioning of the load and the holding of the position can be performed accurately.

The sphere 2 is provided with the first groove 1A and the second groove 1A.
Of the groove 1B is about the same as the depth of the groove 1B or several times. When the slide mechanism 5 moves, the sphere 2 moves while being pressed against the shaft 1 by the spring 3. The sphere 2 has the first groove 1A and the second groove 1B.
In the above, the parts function as positioning parts and holding parts by being fitted into these grooves.

The spring 3 presses the sphere 2 against the shaft 1. The sphere holding unit 4 holds the spring 3 therein and holds the sphere 2.

As described above, in this moving operation device including the shaft 1 and the slide mechanism 5 having the sphere 2 pressed by the shaft 1, the slide mechanism 5 is provided with the first groove. 1A and the first groove 1A
1M between the second groove 1B and the second groove 1B separated by a distance L
Move while pressing the sphere 2 against the shaft 1,
The slide mechanism 5 is positioned by fitting the spherical body 2 into these grooves by the groove 1A and the second groove 1B, and this position is maintained.

Further, the second surface 1b of the first groove 1A
And the third surface 1c of the second groove 1B is connected to the first groove 1B.
When a force exceeding a threshold is applied to the center of the shaft 1 on the slide mechanism 5 held in the A and the second groove 1B, the angle is such that the slide mechanism 5 can move over these surfaces.

Next, a magnetic circuit for generating a driving force for moving the slide mechanism 5 in a linear direction along the shaft 1 will be described.

As shown in FIGS. 3 and 4, the magnetic circuit includes a shaft 1 formed of a material having high magnetic permeability having at least one groove formed in a direction substantially perpendicular to the axial direction. A yoke 11a formed of a material having high magnetic permeability and formed in a U-shape and having both ends joined to both ends of the shaft, and a linear drive magnet 13 attached to the yoke 11a. Consists of

The yoke 11a is formed in a substantially U-shape from a material having a high magnetic permeability, and both ends are respectively joined to both ends of the shaft 1, and are attached to the inner side surface of the yoke 11a. The magnetic flux generated from the linear drive magnet 13 is guided around.

The linear drive magnet 13 has a substantially rectangular parallelepiped shape, is magnetized in a direction substantially perpendicular to the main surface, and is attached to the surface of the yoke 11a facing the shaft 1.

The linear drive coil 12 is attached to the slide mechanism 5. The linear drive coil 12 is disposed so that the coil rotates around the shaft 1, and generates a magnetic field according to a drive current. And
The linear drive coil 12 is combined with the magnetic circuit to constitute a linear motor that drives the slide mechanism 5 in a linear direction.

Here, in FIG. 4, when the shortest distance between the linear drive magnet 13 and the shaft 1 is Lg and the radius of the shaft 1 is RY, the gap length Lgg is calculated by the following equation in consideration of the flow of magnetic flux. The calculated values agree well with the measured values.

Lg + RY / 2 = Lgg Here, the slide mechanism 5 of the moving operation device is moved rightward from one end to the other end along the shaft 1 to measure the thrust required for the movement. The results obtained are shown below.
This measurement was performed in the range from the position of the sphere 2 of the slide mechanism 5 to the position of the first groove 1A to the fourth surface 1d of the second groove 1B.

First, the result of measuring the thrust required for moving the slide mechanism 5 under the first condition will be described.

Here, as shown in FIG. 5A, the shaft 1 has a first groove 1A composed of a first surface 1a and a second surface 1b, and a third surface 1c and a third groove 1A. It has a second groove 1B composed of a fourth surface 1d. The second surface 1b
The angle between the third surface 1c and the axial direction of the shaft 1 is 20 degrees.

The spring 3 has a free length of 1.5 mm when no load is applied and a spring constant of 5.1 gf / mm. When the sphere 2 is located in the first groove 1A or the second groove 1B, the spring length is 1.441 mm, and the pressure for pressing the sphere 2 against the shaft 11 is 3.0 gf. When the sphere 2 is located at the inter-groove portion 1M of the shaft 1, the spring length is 1.18 mm and the pressure is 1
It is 6.6 gf.

As shown in FIG. 5 (b), the thrust for pushing the spherical body 2 on the second slope 1b of the first groove 1A is about 15 gf at the maximum, but the first thrust is about 15 gf. The thrust to be moved in the inter-groove portion 1M between the groove 1A and the second groove 1B is substantially constant and is about 5 gf. Although the thrust required to push down the ball 1 along the third surface 1c of the second groove 1B is a negative value, the thrust required to push up the fourth surface 1d is 45 gf even if friction is ignored. A certain degree of thrust is required.

Next, the slide mechanism 5 is connected to the shaft 1
Shows the result of measuring the thrust required to move the right side in the figure along the line under the second condition.

The shape of the shaft 1 and the constant of the spring 3 are equal to those in the above first condition. That is, the shaft 1
As shown in FIG. 6A, a first groove 1A composed of a first surface 1a and a second surface 1b, and the third surface 1c
And a second groove 1B composed of a fourth surface 1d, and the angle between the second surface 1b and the third surface 1c and the axial direction of the shaft 1 is 20 degrees. The spring 3 has a free length of 1.5 mm when no load is applied and a spring constant of 5.1 gf.
/ Mm.

However, the pressure at which the spring 3 presses the sphere 2 against the shaft 1 is different from the above. That is, the sphere 2
When it is located in the first groove 1A or the second groove 1B, the spring length is 1.341 mm, and the pressure for pressing the sphere 2 against the shaft 1 is 8.1 gf. When the sphere 2 is located in the groove 1M of the shaft 1, the spring length is 1.08 mm and the pressure is 21.4.
gf.

As shown in FIG. 6B, the thrust for pushing the spherical body 2 on the second slope 1b of the first groove 1A is about 17 gf at the maximum, but the thrust is about 17 gf. The thrust to be moved in the inter-groove portion 1M between the groove 1A and the second groove 1B is substantially constant and is about 6 gf. In order to push up the sphere 2 on the fourth surface 1d, 59 g is applied even if friction is ignored.
A thrust of about f is required.

Next, the slide mechanism 5 is connected to the shaft 1.
The result of measuring the thrust required for the movement under the third condition by moving along the direction is shown.

The shape of the shaft 1 and the constant of the spring 3 are equal to those in the above-described first and second conditions. That is, as shown in (a) of FIG.
a first groove 1 </ b> A composed of a
And a second groove 1B consisting of a fourth surface 1d and a fourth surface 1d, and the angle between the second surface 1b and the third surface 1c and the axial direction of the shaft 1 is both 20 degrees. . Spring 3
Has a free length of 1.5 mm when no load is applied and a spring constant of 5.1 gf / mm.

However, the spring 3 moves the sphere 2 to the shaft 1
Is different from the above first and second conditions. That is, when the sphere 2 is located in the first groove 1A or the second groove 1B, the spring length is 1.2.
The pressure for pressing the sphere 2 against the shaft 1 is 13.2 gf. When the sphere 2 is located in the groove 1M of the shaft 1, the spring length is 0.98m.
m, the pressure is 26.5 gf. Here, 0.2 mm of the above-mentioned spring length is the length of the spacer.

As shown in FIG. 7 (b), the thrust for pushing the spherical body 2 on the second slope 1b of the first groove 1A is about 17 gf at the maximum, but the thrust is about 17 gf. The thrust to be moved in the inter-groove portion 1M between the groove 1A and the second groove 1B is substantially constant and is about 6 gf. The sphere 2 is moved to the fourth
73gf even if friction is ignored to push up the surface 1d
A certain degree of thrust is required.

Next, the slide mechanism 5 is connected to the shaft 1.
The result of measuring the thrust required for the movement under the fourth condition by moving the robot along is shown.

Here, the shape of the shaft 1 is different from the above, and as shown in FIG.
A first groove 1A composed of the first surface 1b, and a second groove 1B composed of the third surface 1c and the fourth surface 1d.
The angle between the surface 1b and the axial direction of the shaft 1 is 20 degrees, while the angle between the third surface 1c and the axial direction of the shaft 1 is 10 degrees. The angle between the fourth surface 1d and the axial direction is 80 degrees.

As described above, the difference between the angle of the second surface 1b and the angle of the third surface 1c with respect to the axial direction of the shaft 1 is that the first groove 1A has a high precision when the slide mechanism 5 is held. The angle between the second surface 1b and the shaft 1 is set to 20 °, and the angle between the third surface 1c and the shaft 1 that does not require precision in holding the slide mechanism 5 is assured. The angle is larger than 10 °.

The situation where the required accuracy differs depending on the position where the slide mechanism 5 is held is as follows.
For example, in a lens holder, accuracy is required when a lens is inserted into an optical system and set, but accuracy is not required when the lens is simply removed from the optical system and held.

In the measurement under the fourth condition, the spring 3
When the sphere 2 is located in the first groove 1A, the spring length is 1.341 mm, and the pressure for pressing the sphere 2 against the shaft 1 is 8.1 gf. When the sphere 2 is located at the inter-groove portion 1M, the spring length is 1.08 mm and the pressure is 26.5 gf.

As shown in FIG. 8 (b), the thrust for pushing the spherical body 2 on the second slope 1b of the first groove 1A is approximately 15 gf, but the thrust of the first groove 1A is approximately 15 gf. The thrust to be moved in the inter-groove portion 1M between the groove 1A and the second groove 1B is substantially constant and is about 6 gf. The sphere 2 is connected to the second groove 1
The thrust required to move rightward in the figure along the third surface 1c of B is approximately 1 gf, and 130 to 140 gf is required to push up the fourth surface 1d.

Next, the slide mechanism 5 is connected to the shaft 1.
To the right in the figure along with
The results measured under the following conditions are shown.

Here, the shape of the shaft 1 is different from the above, and as shown in FIG. 9A, a first groove 1A comprising a first surface 1a and a second surface 1b, Third face 1
c and a fourth groove 1B composed of a fourth surface 1d. The depth of each of the first groove 1A and the second groove 1B is 0.9.
mm. The angle between the second surface 1b and the axial direction of the shaft 1 is 10 degrees, while the angle between the third surface 1c and the axial direction is 20 degrees. The angle between the fourth surface 1d and the direction is 70 degrees.

As described above, the angle between the axis 1 of the second inclined surface 1b of the first groove 1A and the third inclined surface 1c of the second groove 1B is changed. The slide mechanism 5 includes:
The shaft 1 is accurately held by the second groove 1B having the third surface 1c whose angle with the axial direction is 20 °.

When the spherical body 2 is located in the first groove 1A, the spring 3 has a spring length of 1.402 mm,
The pressure for pressing the ball 2 against the shaft 1 is 5.0 gf.
When the ball 2 is located in the inter-groove portion 1M of the shaft 1, the spring length is 1.08 mm and the pressure is 18.3 gf.
It is.

As shown in FIG. 9B, the thrust for pushing the spherical body 2 on the second slope 1b of the first groove 1A is approximately 13 gf, but the thrust of the first groove 1A is approximately 13 gf. The thrust to be moved in the inter-groove portion 1M between the first groove 1A and the second groove 1B is substantially constant and is about 7 gf. The sphere 2 is placed on the fourth surface 1
Approximately 70 gf is required to push up d.

Next, an example of an embodiment in which a stopper is provided in the moving operation device will be described.

As shown in FIG. 10, the moving operation device comprises a shaft 1 having a first groove 1A composed of a first slope 1a and a second slope 1b, a sphere 2, a spring 3, and a sphere holder 4. And a stopper 6. Here, as described above, the second slope 1b
Of the first surface 1a is smaller than a corresponding first angle θ1 of the first surface 1a.

The stopper 6 is connected to the slide mechanism 5
Has a function of mechanically stopping the slide mechanism 5 so as not to move to one end side when the sphere 2 provided in the slide mechanism 5 rides on the first surface 1a due to a strong force applied to the first surface 1a. .

Therefore, the distance x between the center of the sphere 2 of the slide mechanism 5 and the left end of the slide mechanism 5 is greater than the distance a between the left end of the first surface 1a and the right end of the stopper 6, The distance b between the lowermost part of the first groove 1A and the right end of the stopper 6 is larger than the distance x. That is, the following magnitude relationship exists between the distance a, the distance b, and the distance x.

A <x <b Since the sphere 2 is in contact with both the first surface 1a and the second surface 1b of the first groove 1A in a state where no force is applied, a sliding mechanism is provided. 5 strikes the stopper 6 when a strong force is applied to the left end side in the figure and the vehicle 5 runs on the first surface 1a.

By disposing the stopper 6, the slide mechanism 5 can be securely held so as not to move to one end side from the first groove 1A. Further, since the slide mechanism 5 does not collide with the stopper 6 at the time of positioning, the life of the slide mechanism 5 and the like is not shortened by the impact.

Next, the overall structure of the optical pickup device provided with the moving operation device according to the present invention will be described.

As shown in FIGS. 11, 12, and 13, this optical pickup device includes an auxiliary lens switching actuator unit 10 for switching an auxiliary lens that absorbs a difference in aberration due to a difference in the type of a medium, and an objective lens. It comprises a biaxial actuator section 20 driven in the axial direction, and an optical system 30 having a light source and a photodetector.

The biaxial actuator section 20 includes a biaxial fixing section 21 fixed to a housing provided with the optical pickup device, a movement in the direction of the axis 28 with respect to the biaxial fixing section 21, And a two-axis movable portion 22 driven with two degrees of freedom.

The two-axis fixed part 21 is fixed to a housing provided with the optical pickup device, and the two-axis movable part 22
And an auxiliary lens actuator fixing portion 11
Is fixed. The two-axis fixed part 21 is combined with the tracking drive coil 23 to generate a driving force for rotating the two-axis movable part 22 about an axis 28.
5 is a focus driving magnet 26 that generates a driving force to move the biaxial movable part 22 in the direction of the axis 28 in combination with
And the axis 28 serving as an axis of fine movement of the two-axis movable section 22 in the tracking direction and the focus direction.

The two-axis movable part 22 has an objective lens 27 for condensing and irradiating a laser beam onto the optical recording medium, and is combined with a tracking drive magnet 24 so that the two-axis movable part 22 A tracking drive coil 23 for generating a driving force for rotating the motor 22 and a focus driving coil 25 for generating a driving force for moving the two-axis movable portion 22 in the direction of the axis 28 in combination with the focus driving magnet 26. .

The auxiliary lens switching actuator section 10 includes an auxiliary lens switching actuator fixing section 11 fixed to the biaxial fixing section 21 and a sliding mechanism section 5.
, A yoke 11 a for guiding magnetic flux, a linear drive coil 12, a linear drive magnet 13, a slide mechanism 5, and an auxiliary lens 14.
And an auxiliary lens holder 15.

The tracking drive coil 23 is attached to substantially the end of the biaxial movable portion 22 by the tracking fixed portion 21.
The tracking drive magnet 24 is disposed to face the tracking drive magnet 24, generates a magnetic field according to the drive current, and is combined with the tracking drive magnet 24 to rotate the biaxial movable portion 22 about an axis 28. To generate a driving force.

The tracking drive magnet 24 is
It is formed of a so-called permanent magnet having a large coercive force, and is disposed substantially at the end of the biaxial fixed portion 21 and provided in the biaxial movable portion 22 so as to face the tracking drive coil 23. In combination with the coil 23, a driving force for rotating the biaxial movable portion 22 about the shaft 28 is generated.

The focus driving coil 25 is disposed substantially in a cylindrical shape on the back side of the main surface of the biaxial movable portion 22 so as to surround the shaft 28 of the biaxial fixing portion 21, and generates a magnetic field according to a driving current. The focus drive magnet 2
6 generates a driving force for moving the biaxial movable portion 22 in the direction of the axis 28.

The focus driving magnet 26 is formed of a permanent magnet having a large coercive force.
1 is disposed at a substantially central portion so as to face the focus driving coil 25 of the biaxial movable portion 22 which is disposed in a substantially cylindrical shape surrounding the shaft 28,
5 and the two-axis movable part 22
Is generated in the direction of the axis 28.

Here, the tracking drive coil 23
The axial movement of the biaxial movable portion 22 driven by the tracking drive magnet 24 corresponds to the movement in the tracking direction substantially perpendicular to the recording track on the optical recording medium. The driving of the focus driving coil 25 and the focus driving magnet 26 in the direction of the axis 28 corresponds to the driving of the objective lens 27 in the focusing direction of the optical axis.

The objective lens 27 is connected to the biaxial movable section 2.
2 through an auxiliary lens 14 provided on the slide mechanism section 5 of the auxiliary lens actuator section 10 provided opposite to the optical recording medium 101 and without the auxiliary lens 14. The laser beam supplied from the optical system 30 is focused on the optical recording medium 101. Further, it receives the reflected light of the laser light from the optical recording medium 101 and gives it to the optical system 30 as a light beam.

The shaft 28 has a columnar shape and is disposed substantially vertically at the center of the bottom of the biaxial fixed part 21, penetrates the center of the biaxial movable part 22, and Reach 22 main faces. The shaft 28 rotates the biaxial movable portion 22 with respect to the shaft 28 and supports the translation in the direction of the shaft 28. As described above, the rotation corresponds to the movement in the tracking direction, and the translation corresponds to the movement in the focus direction.

The auxiliary lens actuator fixing section 11
Is a frame having a substantially rectangular parallelepiped outer periphery,
Fixed to This auxiliary lens actuator fixing part 1
Reference numeral 1 denotes a magnetic circuit integrally formed with the shaft 1 that is formed of a material having a high magnetic permeability and supports the slide mechanism 5 disposed substantially at the center of the auxiliary lens actuator fixing portion 11. , This auxiliary actuator fixing part 11
The magnetic flux generated from the linear drive magnet 13 attached to the inner side surface of the wire is guided around.

The shaft 1 is formed of a material having a high magnetic permeability in a cylindrical shape, has at least one groove that is substantially perpendicular in the axial direction, and has a substantially central portion of the auxiliary lens drive actuator fixing portion 11. It is disposed in a direction substantially perpendicular to the biaxial fixing portion 21. The shaft 1 guides a magnetic flux generated from the linear drive magnet 13 and serves as a shaft that supports the slide mechanism 5 so as to be movable in a linear direction.

The shaft 1 has a first surface 1a and a second surface 1b on the optical recording medium 101 side with respect to the central axis of the shaft 1 and in a direction substantially perpendicular to the axial direction. It has one groove 1A. The angle between the second surface 1b and the axial direction of the shaft 1 is smaller than the angle between the first surface 1a and the axial direction. As described above, the first surface 1a is connected to the slide mechanism 5
Is held so as not to get over the first surface 1a. The second surface 1b holds the sphere 2 so as not to get over the second surface 1b. However, when a force greater than a threshold is applied, the sphere 2 gets over the second surface 1b. .

The slide mechanism 5 includes an auxiliary lens 14
Holder 15 and linear drive coil 12 for supporting
And is disposed so as to be movable in the linear direction along the shaft 1 integrally with the shaft 1. The slide mechanism 5 has a sphere 2 against which the shaft is pressed, and moves while pressing the sphere 2 against the shaft 1. The slide mechanism 5 is provided with a driving force in the linear direction by the linear drive coil 12. Then, positioning and holding are performed by fitting the sphere 2 into a first groove 1A or the like formed in the shaft 1.

The yoke 11a forms a part of the auxiliary lens fixing portion 11, is made of a material having high magnetic permeability, has a substantially rectangular parallelepiped outer edge, is joined to the shaft 1, and is connected to the linear The magnetic flux generated from the drive magnet 13 is guided around.

The linear drive coil 12 is provided on the slide mechanism 5 and is wound around the shaft 1 so as to be movable in a linear direction. This linear drive coil 12
A driving force in the linear direction is generated in combination with the magnetic flux generated from the linear drive magnet 13 to move the auxiliary lens holder 15 including the auxiliary lens 14 in the linear direction.

The linear drive magnet 13 has a substantially rectangular parallelepiped shape, is formed of a material having a large coercive force and magnetized in the main surface direction, and is attached to the inner side surface of the yoke 11a. The magnetic flux generated by the linear drive magnet 13 generates a driving force in a linear direction together with the linear drive coil 12.

The auxiliary lens 14 is supported by the lens holder 15 and corrects aberrations depending on the type of the optical recording medium 101. If necessary, the auxiliary mechanism 14 is moved together with the lens holder 15 by the slide mechanism 5. It is moved in the linear direction and inserted into the optical path immediately below the objective lens 27.

The lens holder 15 is a flat rectangular parallelepiped plate formed integrally with the slide mechanism 5, and has an auxiliary lens 14 at the center of the main surface.

The optical system 30 includes a light source 31, a photodetector 32, a half mirror 33, and a collimator lens.

The light generated by the laser diode or the like of the light source 31 is turned by 90 degrees by the half mirror 33, converted into a parallel light beam by the collimator lens 34, and passed through the objective lens 27 or The light is condensed and irradiated onto the recording medium 101 via the auxiliary lens 27 and the auxiliary lens 14.

The reflected light from the recording medium 101 is obtained via the objective lens 27 or via the objective lens 27 and the auxiliary lens 14, and is output from the collimator lens 34.
And is incident on the photodetector 32 via the half mirror 33.

In this embodiment, the shaft 1 has a cylindrical shape, but is not limited to this shape.

Further, in this embodiment, a helical spring is used as the spring 3 for pressing the sphere 2 against the shaft 1, but the present invention is not limited to this. For example, as shown in FIG. 14, a leaf spring can be used. That is,
The slide mechanism 4 in FIG. 14 uses a leaf spring 61 instead of the spring 3 of the slide mechanism 5 described above, and the leaf spring 61 is held and fixed by a leaf spring holding section 62.

Further, in this embodiment, the angle formed by the surface of the groove formed in the shaft 1 with respect to the axial direction of the shaft 1 is shown. However, this angle is merely an example. Not limited.

[0090]

As described above, in the moving operation device according to the present invention, the positioning of the slide mechanism is performed by fitting the sphere of the slide mechanism into the groove formed in the shaft. There is no need to directly contact the slide mechanism with the stopper. For this reason, no impact occurs and the life of the slide mechanism can be extended.

Further, in the above positioning, it is not necessary to always bring the slide mechanism into contact with the stopper by the drive mechanism including the coil and the magnet, so that there is no need to energize the coil. Therefore, a decrease in accuracy due to deformation due to expansion of the holding member or the like due to heat generation of the coil does not occur, and
Power consumption can be reduced.

Further, since the holding of the moving operation device is performed by fitting a sphere with a groove formed in the shaft, the positional accuracy is high. Therefore, it is suitable as a moving operation device for an optical element such as a lens that requires positional accuracy.

Further, the groove formed in the shaft of this moving operation device has a V-shape between the movable side surface and the stop side surface, and the angle formed by the movable side surface with respect to the axial direction of the shaft is as follows. The angle on the stop side surface is smaller than the angle formed by the axial direction. Thus, the movable side can select whether to hold or move the slide mechanism depending on whether or not the thrust exceeds the threshold, and the stop side can reliably hold.

The moving operation device has a stopper for stopping the slide mechanism in a state where the sphere is positioned on the slope on the stop side. Therefore, even when a strong force is applied to the slide mechanism portion on the stop side, the mechanical operation device is not moved. Hold can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a movement operation device.

FIG. 2 is a longitudinal sectional view of the moving operation device.

FIG. 3 is a plan view of a magnetic circuit.

FIG. 4 is a left side view of the magnetic circuit.

FIG. 5 is a graph of a shape of a first shaft and a thrust for sliding a slide mechanism along the shaft.

FIG. 6 is a graph of a shape of a second shaft and a thrust for sliding a slide mechanism along the shaft.

FIG. 7 is a graph of a shape of a third shaft and a thrust for sliding a slide mechanism along the shaft.

FIG. 8 is a graph of thrust for sliding a fourth shaft shape and a slide mechanism along a shaft.

FIG. 9 is a graph of the shape of a fifth shaft and a thrust for sliding a slide mechanism along the shaft.

FIG. 10 is a sectional view of a moving operation device having a stopper.

FIG. 11 is a plan view of the optical pickup device.

FIG. 12 is a cross-sectional view of the optical pickup device.

FIG. 13 is a longitudinal sectional view of the optical pickup device.

FIG. 14 is a sectional view of a moving operation device using a leaf spring.

[Explanation of symbols]

1 shaft, 1A first groove, 1B second groove, 2
Spherical body, 3 springs, 5 slide mechanism section, 10 auxiliary lens switching actuator section, 11a yoke, 12 linear drive coil, 13 linear drive magnet, 20 biaxial actuator section, 30 optical system

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Michiko Yamazaki Inventor, Sony Corporation 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo

Claims (4)

[Claims] 1. A shaft formed of a material having high magnetic permeability having at least one groove formed in a direction substantially perpendicular to the axial direction, and a U-shaped shaft having both ends on both ends of the shaft. A magnetic circuit composed of a yoke formed of a material having a high magnetic permeability joined to the portion, and a magnet attached to the yoke; and a magnetic circuit configured to be movable along the shaft. A moving operation device comprising: a moving body supported by a shaft and having a driving coil attached thereto; and a sphere supported by the moving body and pressed against the shaft. 2. The moving operation device according to claim 1, wherein a lens is attached to the moving body, and the lens is moved. 3. The groove has a first surface forming a first angle with respect to an axial direction of the shaft, and a second surface forming a second angle smaller than the first angle with respect to the axial direction. 2. A V-shape is formed by the surfaces of
The moving operation device according to the above. 4. When the moving body is moved from the second surface side to the first surface side, the moving body contacts the moving body while the sphere is on the first surface. The moving operation device according to claim 3, further comprising a stopper for stopping the operation.