JPH07107741B2 - Optical pickup device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel optical pickup device. More specifically, an optical pickup device that irradiates a recording surface of an optical disc with a beam of light for recording, or irradiates a recording surface of a recording with a beam of light and detects the return light to read the signal. In particular, it is necessary to provide an objective lens for converging the light beam on the recording surface of the optical disk so as to be movable in the optical axis direction of the optical disk, that is, the focusing direction and the direction orthogonal to the focusing direction, that is, the tracking direction. The present invention relates to a pickup device, and it is an object of the present invention to provide a novel optical pickup device that can reduce the size of the entire optical pickup device by devising the shape and mounting position of the objective lens holding member.

[0002]

2. Description of the Related Art Recording using an optical disc involves modulating a signal to be recorded into a digital signal by a combination of "0" and "1" and forming pits corresponding to the digital signal on the recording surface of the optical disc. The pits are formed in a "helical" continuous 1
It is formed by drawing a book track.

The reproduction of the signal recorded as described above is performed by irradiating the recording light track of the optical disk with a beam of light oscillated from a laser oscillator such as a semiconductor laser and detecting the returning light. It is performed by detecting the presence or absence.

Therefore, in a so-called laser disc player or the like for reproducing music or images recorded on an optical disc, an optical pickup device having an objective lens for converging beam light on the recording surface of the optical disc is provided. During reproduction, the optical disc is rotated and the objective lens is moved so that its optical axis follows the recording track.

Further, in order to detect the signal recorded on the optical disc with high accuracy, it is necessary that the light beam is focused on the recording surface with a spot having a predetermined diameter. For this purpose, the objective lens is used. The distance between the recording surface of the optical disc and the recording surface of the optical disc must always be kept constant. The accuracy required to keep this distance constant needs to be at least within the depth of the pit, that is, an error of about 0.1 micron or less. However, it is extremely difficult to process the recording surface of the optical disk with such accuracy, and the distance is remarkably changed depending on the accuracy of the spindle mechanism on which the optical disk is mounted. Become.

Therefore, in this type of optical pickup device, in order to be able to adjust the distance between the objective lens and the recording surface of the optical disc if it deviates from a predetermined value, the objective is adjusted. It is configured so that the lens can be moved in the optical axis direction.

As described above, in the optical pickup device, the objective lens is usually arranged in the optical axis direction of the objective lens, that is,
It is provided so as to be movable in the focusing direction and the direction orthogonal to the focusing direction, that is, the tracking direction.

FIG. 13 conceptually shows an example a of a conventional optical pickup device in which an objective lens is provided so as to be movable in a focusing direction and a tracking direction.

In the figure, b is a lens holding member, and an objective lens c is fixed to the lens holding member b. Reference numeral d denotes a sliding member supported by a supporting member (not shown) so as to be slidable in the direction along the optical axis of the objective lens c,
The sliding member d and the lens holding member b are made of a leaf spring material or the like that can bend in a direction orthogonal to the optical axis direction, and two parallel arms e extending parallel to each other,
connected by e.

Therefore, the objective lens c is supported so as to be movable in the focusing direction and the tracking direction orthogonal thereto.

[0011]

However, in the above-mentioned conventional optical pickup device a, the two parallel arms e, e made of a metal material are provided with the end portions of the parallel arms e, e on both ends thereof. Since the resin molded parts b and d are formed so as to be connected to each other, the length of the movable body including the sliding member d, the parallel arms e and e, and the lens holding member b is increased, and the optical pickup device a is downsized. There was a problem that it could not be achieved.

Further, although the lens holding member is not shown in the figure, the focusing coil and / or the tracking coil are usually provided on the side surface of the lens holding member, so that the lens holding member needs to have a certain length. It had grown up.

[0013]

In order to solve the above-mentioned problems, the optical pickup device of the present invention has a mounting portion for the objective lens at one end and is substantially parallel and identical from both sides of the mounting portion. An objective lens holding member having an arm portion projecting in a direction, the outer surface of the arm portion being a coil arrangement portion, and the objective lens holding member arranged between the two arm portions, and the objective lens holding member is provided in a focusing direction and a tracking direction. A supporting member that movably supports the object, a focusing coil that is attached to the coil placement portion and is wound in a rectangular shape with tracking coils attached to the surfaces, and an objective according to the drive current flowing through the focusing coil or the tracking coil. Magnets provided to the focusing coil and the tracking coil in order to give a moving force to the lens. It is obtained by a circuit.

[0014]

Therefore, according to the optical pickup device of the present invention, the arm portions are provided so as to project from both sides of the objective lens holding member.
Since the focusing coil and the tracking coil are respectively arranged on the outer surfaces of the one arm, and the supporting member for movably supporting the objective lens holding member in the focusing direction and the tracking direction is arranged between the two arms, It is possible to reduce the size of the movable member formed by coupling the objective lens holding member and the supporting member in the extending direction of the supporting member, and to downsize the optical pickup device.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the optical pickup device of the present invention will be described below with reference to the respective embodiments shown in the accompanying drawings.

1 to 4 show a first embodiment 1 of the optical pickup device of the present invention.

Reference numeral 2 denotes a base substrate of the optical pickup device 1. The base substrate 2 is in the front-back direction, that is, the left-right direction in FIG. 1 (the leftward direction in FIG. 1 is the front side, and the rightward direction is the rear side). In addition, the upward direction in the figure is the left side, and the downward direction is the right side. In the following description, the direction is based on this direction. It is formed into a plate-like shape in which the parts are cut off obliquely, and the other three corners are thickly formed, and the mounting long holes 3, 3 are formed in the thickly formed portions. 3 is formed.

Reference numeral 4 denotes an opening formed in the center of the base substrate 2 in the left-right direction so as to extend along the front-rear direction, and its width is approximately half the length of the base substrate 2 in the left-right direction. The front end portion is formed to have a semicircular shape.

Reference numeral 5 denotes a mounting base portion projecting between the rear edge of the upper surface of the base substrate 2 and the rear end of the opening 4, and the left and right ends are formed slightly higher than the other portions. At the same time, screw holes 6, 6 are formed in the upper surfaces of the left and right ends.

Reference numerals 7, 7 ′ and 8, 8 ′ are yokes formed upright from the upper surface of the base substrate 2. Of these yokes 7, 7 ′ and 8, 8 ′, the inner ones 7, 7 ′ rise from the part of the upper surface of the base substrate 2 along the substantially central part in the front-rear direction of the side edge of the opening 4. Which are formed on the outside 8
Reference numeral 8'is formed in a state of extending in parallel with the inner yokes 7 and 7'from portions of the upper surface of the base substrate 2 along both left and right edges. And these yokes 7, 7'and 8, 8 '
Is formed in a plate shape that is a substantially rectangular shape that is long in the vertical direction.

The base substrate 2 is fixed on an optical block, not shown. And, in the optical block,
For example, a semiconductor laser that oscillates a laser beam, a collimator lens that guides the laser beam oscillated from the semiconductor laser to an objective lens described later, and a quarter-wave plate, and a laser beam oscillated from the semiconductor laser and an optical disk are reflected. Optical system components such as a polarization beam splitter that separates the return light and a photodetector that detects the return light, and further calculates a focus error signal and a tracking error signal from the return light detected by the photodetector. Moreover, a control circuit and the like for supplying a correction current to a focusing coil and a tracking coil described later according to the error signal are provided.

The laser beam oscillated from the semiconductor laser provided in the optical block is in the state of parallel light flux as shown by the two-dot chain line arrow in FIG. The light is emitted upward through the front end of the.

Reference numerals 9 and 9'indicate magnets. The magnets 9 and 9'are formed in substantially the same shape as the yokes 7, 7'and 8, 8 ', and face the inner yokes 7 and 7'of the outer yokes 8 and 8', respectively. It is fixed to the surface on the side to be fixed by a fixing means such as adhesion.

Thus, a magnetic path is formed between the inner yokes 7 and 7 ', the magnets 9 and 9', and the outer yokes 8 and 8'in which the magnetic lines of force extend in the horizontal direction.

A coil, which will be described later, is positioned in the magnetic path thus formed.

Reference numeral 10 denotes a support arm that supports an objective lens holding member described later so as to be movable in the vertical direction, that is, the focusing direction and the horizontal direction, that is, the tracking direction. The support arm 10 is mounted on the base substrate 2. The fixed base, the parallel link, and the hinge member are integrally formed of synthetic resin.

Reference numeral 11 denotes a base portion of the support arm 10. The base portion 11 is formed in a planar shape and has substantially the same shape as the mounting base portion 5 formed on the base substrate 2, and the left and right ends thereof are vertically arranged. Insertion holes 12 and 12 extending along are formed.

Reference numerals 13 and 13 are parallel links. The parallel links 13, 13 have a substantially rectangular shape that is long in the front-rear direction when viewed from above, and are formed in a plate shape that has a substantially trapezoidal shape that is long in the front-rear direction when viewed from the left-right direction. The rear end edges of the parallel links 13 and 13 and the front end portions of the upper and lower end surfaces of the base portion 11 are connected to each other through the extremely thin flexible portions 14 and 14.

Reference numeral 15 is a hinge member. The hinge member 1
Reference numeral 5 denotes two hinge pieces 15a, 15b positioned so as to face each other in the front-rear direction, and these hinge pieces 15a,
By being integrally formed with the flexible portion 15c that connects the respective central portions of 15b, the flexible portion 15c is formed so as to form a substantially H shape when viewed from above. That is, the hinge pieces 15a and 15b are formed in a plate shape that is a substantially square shape when viewed from the front-rear direction, and the height thereof is substantially the same as the height of the base portion 11. The central portions of the mutually facing surfaces of 15a and 15b are connected by a flexible portion 15c having an outer shape such that two arcs circumscribe each other in the left-right direction when viewed from above. That is, the central portion of the flexible portion 15c is formed to be extremely thin, and the thinned portion serves as the axis of the hinge member 15, that is, the hinge axis.

The rear end portion 15b of the rear side of the two hinge pieces 15a, 15b and the rear end portions of the upper and lower end surfaces and the front end edges of the parallel links 13, 13 are extremely thin flexible portions 1
They are connected via 6, 16.

Further, the support arm 1 thus formed
0 means that the hinge 11 is placed on the mount 5 formed on the base substrate 2 in a direction in which the hinge member 15 is located above the substantially central portion of the opening 4 formed on the base substrate 2. At the same time, the lower portions of the bolts 17, 17 that are inserted through the insertion holes 12, 12 are screwed into the screw holes 6, 6 formed in the mounting base portion 5 to be mounted on the base substrate 2. 18 and 18 are base 11 and bolts 17 and 1.
It is a washer that is inserted between the head and the head of 7.

Therefore, the hinge member 15 is the parallel link 1
It will be supported by the base substrate 2 via 3, 13 and the base 11.

Therefore, when a moving force in the focusing direction is applied to the hinge member 15, the hinge member 15 is
The parallel links 13, 13 are rotated in parallel with each other while facing each other, so that the hinge pieces 15 are always rotated.
The a and 15b are moved in the focusing direction while maintaining the posture in which they extend in the vertical direction.

Further, the hinge piece 1 on the front side of the hinge member 15
When a moving force in the tracking direction is applied to 5a, the hinge piece 15a is rotated in the tracking direction around the hinge axis.

Reference numeral 19 denotes an objective lens holding member provided with an objective lens described later.

The height of the objective lens holding member 19 is substantially the same as the height of the hinge member 15, and the outer shape viewed from above is slightly smaller than the opening 4 formed in the base substrate 2. A lens mounting portion 19a having a similar shape and having a large-diameter lens mounting hole 20 whose axis extends in the up-down direction, and the left and right end portions of the lens mounting portion 19a extend rearward in parallel to each other. Arms 19b, 19
and b are integrally formed.

The hinge member 15 is provided at a portion between the rear end surface of the lens mounting portion 19a and the lens mounting hole 20.
The hinge attachment grooves 21, 21 extending in the vertical direction are formed so as to face each other with a width substantially equal to the thickness of the hinge piece 15a.

Also, the rear ends of the arms 19b, 19b have mounting holes 22, 2 located on the same axis extending in the left-right direction.
2 is formed.

Further, an annular protrusion 20a is formed at a substantially central portion in the vertical direction of the lens mounting hole 20 formed in the lens mounting portion 19a.

In the thus-formed objective lens holding member 19, both side end portions of the hinge piece 15a on the front side of the hinge member 15 of the support arm 10 are engaged with the hinge mounting grooves 21, 21 thereof. And the hinge piece 15a
Is adhered to the rear surface of the lens attachment portion 19a, so that it is supported by the support arm 10 via the hinge member 15.

Thus, the objective lens holding member 19 is supported by the parallel links 13 of the support arm 10 so as to be movable in the focusing direction, and is hinged by the hinge member 15 so as to be rotatable in the tracking direction. Will be supported.

Reference numeral 23 is an objective lens. The objective lens 2
3 is supported and fixed to a lens holder 24 formed in a substantially cylindrical shape, and a lower portion of the lens holder 24 is press-fitted into an upper portion of a lens mounting hole 20 formed in a lens mounting portion 19a of the objective lens holding member 19. It is provided at the front end of the objective lens holding member 19 in a state where its optical axis extends in the up-down direction.

25 and 26 are the objective lens holding members 1
It is a balancer attached to 9. These balancers 2
Reference numerals 5 and 26 are provided so that a portion of the objective lens holding member 19 that is located in front of and behind the hinge axis of the hinge member 15 and a portion that is located above and below it are weight-balanced.

The front one 25 of the balancers 25 and 26 is formed in a substantially cylindrical shape that is short in the axial direction, and has an annular projection in the lens mounting hole 20 formed in the lens mounting portion 19a of the objective lens holding member 19. The objective lens holding member 19 is fixed to the front end portion of the objective lens holding member 19 by being fixed so as to be fitted into the lower portion from the strip 20a.

The balancer 26 on the rear side is formed in a substantially columnar shape, and the projections 26a, 26 are formed on the left and right end surfaces thereof.
a is formed, and these projections 26a, 26a are fitted into the mounting holes 22, 22 formed in the arms 19b, 19b of the objective lens holding member 19, so that the rear end portion of the objective lens holding member 19 is formed. It is attached.

Therefore, the center of gravity of the objective lens holding member 19 is located at the same position as the hinge axis of the hinge member 15 of the support arm 10. More specifically, the hinge axis of the hinge member 15 is located so as to pass through the center of gravity of the objective lens holding member 19.

Therefore, in order to rotate the objective lens holding member 19 in the tracking direction, the objective lens holding member 19 is moved from the center of gravity of the objective lens holding member 19 to the objective lens 23 side or the opposite lens 23 side. On the other hand, it is necessary to apply a moving force from the tracking direction.

Reference numerals 27 and 27 'denote drive coils attached to the outer surfaces (hereinafter, referred to as "coil disposing portions") 19c and 19c of the arms 19b and 19b of the objective lens holding member 19.

The drive coils 27, 27 'are formed into a rectangular tubular shape having a substantially rectangular shape which is long in the front-rear direction when viewed from above.
Coil bases 28, 28 'and second coil bases 29 fixed to the opposite side surfaces of the first coil bases 28, 28' and formed in a substantially square plate shape. , 29, 29 ′, 29 ′, focusing coils 30, 30 ′ are provided on the outer periphery of the first coil bases 28, 28 ′, and second coil bases 29, 29, 29 ′, 29. Tracking coil (3
1) and (31) (those formed on the second coil bases 29, 29 on the left side in the drawing are not shown) 31 ', 31' are provided.

These coils 30, 30 'and 31, 3
1, 31 'and 31' are attached to the coil placement portions 19c and 19c of the arms 19b and 19b, respectively.
9c is a direction in which the parallel links 13, 13 extend, that is,
Since it can be formed relatively long in the front-rear direction, the coils 30, 30 'and 31, 31, 31', 31 'can be made relatively large, and the driving force can be increased.

Then, these drive coils 27, 27 '
Is fixed to the left and right side surfaces of the objective lens holding member 19 by adhesion or the like with the first coil bases 28 and 28 'positioned inside the inner yokes 7 and 7'in a loosely fitted state. It is fixed by means.

Therefore, the drive coils 27, 27 'have the above-mentioned magnetic paths, that is, the inner yokes 7, 7'and the magnets 9,
It will be located in the magnetic path formed by 9'and the outer yokes 8, 8 '.

Therefore, the driving coils 27 and 27 'are urged to move vertically by supplying a current to the focusing coil 30 or 30', and the tracking coils (31) and (31) are also urged. , Or 31 ', 3
By supplying the current to 1 ', the moving force in the left-right direction is urged.

Therefore, focusing by the optical pickup device 1 configured as described above, that is, control for keeping the distance between the objective lens 23 and the recording surface of the optical disk (not shown) constant, and tracking, that is,
The control for positioning the optical axis of the objective lens 23 at the center of the recording track on the optical disk is performed as follows.

That is, the light beam applied to the optical disc through the objective lens 23 is reflected on the recording surface of the optical disc, and a part of the light beam returns to the optical block side through the objective lens 23. Then, the control circuit provided inside the optical block reads the focus error signal and the tracking error signal from the return light detected by the photodetector, and at the same time, outputs the correction current having a value corresponding to the amount of the error to the focusing coils 30 and 30. ′ And to the tracking coils 31, 31, 31 ′, 31 ′, respectively.

As a result, the focusing coil 3
Since the moving force in the focusing direction is generated due to the relationship between the direction of the current flowing through 0 and 30 'and the direction of the magnetic flux of the magnetic path, the objective lens holding member 19 is moved in the focusing direction to perform the focusing. become. Also, similarly to this, the tracking coil (3
In 1), (31), 31 ', 31', a moving force in the tracking direction is generated due to the relationship between the direction of the current flowing therethrough and the direction of the magnetic flux of the magnetic path.
9 is rotated in the tracking direction around the hinge shaft of the hinge member 15 as a rotation center, whereby the objective lens 23 is rotated.
Will be tracked.

FIGS. 5 to 8 show a second embodiment 1A of the optical pickup device of the present invention.

The difference between the second embodiment and that shown in the first embodiment is that the parallel links are made of a leaf spring material and are separated from other members. Only the points formed.

Therefore, only the portions different from the first embodiment will be described, and the portions not different from the first embodiment will be designated by the same reference numerals as those used in the first embodiment, and the description thereof will be omitted. Note that the relationship between the use of the reference signs and the omission of the description is the same in the third embodiment described later.

In the figure, 32 is a support arm. Three
Reference numerals 3 and 33 are parallel links formed of a leaf spring material, and the front ends of the parallel links 33 and 33 are separately bonded and fixed to the upper and lower end surfaces of the hinge piece 15b on the rear side of the hinge member 15, respectively. The rear end is the base 1 of the support arm 32.
The upper and lower end surfaces of 1 are separately fixed by adhesion.

As a result, most of the parallel links 33, 33 of the support arm 32 have two arms 19 of the movable body 19.
It is located between b and 19b.

34 is a washer.

Since the objective lens holding member 19 is supported by the base substrate 2 via the hinge member 15, the parallel links 33, 33, and the base 11, the parallel link 3 is held.
Due to the flexibility of 3, 33, it is supported so as to be movable in the focusing direction, and also supported by the hinge member 15 so as to be rotatable in the tracking direction.

9 to 12 show a third embodiment 1B of the optical pickup device of the present invention.

The main difference between the third embodiment and the first embodiment is that one hinge piece of the hinge member is fixed to the base board and the parallel link is used. The base end portion of is fixed to the other hinge piece of the above-mentioned hinge member, and the end portion of the objective lens holding member on the opposite lens side is supported by the tip end portion of the parallel link.

Reference numeral 35 denotes a circular opening formed at a position approximately in the middle between the central portion of the base substrate 2 and the front edge thereof, and 36 denotes a position on the upper surface of the base substrate 2 which is located slightly behind the opening 35. It is a hinge mounting plate formed in a rising shape.

The hinge piece 15a on the front side of the hinge member 15 is fixed to the rear surface of the hinge mounting plate 36 by fixing means such as adhesion.

Reference numeral 37 is an objective lens holding member. The objective lens holding member 37 has a front end portion (hereinafter referred to as "lens mounting portion") 37a formed in substantially the same shape as the lens mounting portion 19a of the objective lens holding member 19 shown in the first embodiment. The lens mounting portion 37a, arms 37b and 37b extending rearward from both left and right ends of the lens mounting portion 37a in parallel with each other, and a rear end coupling connecting the rear ends of the arms 37b and 37b. It is formed integrally with the piece 38, and the connecting piece 38 is formed to be considerably thicker than other portions.

Then, the focusing coils 30 and 3
0'and tracking coils 29, 29, 29 ', 2
9'is attached to the outer side surfaces (hereinafter, referred to as "coil disposing portions") 37c, 37c of the arms 37b, 37b of the objective lens holding member 37 as in the first embodiment.

Reference numerals 39 and 39 are parallel links formed of a leaf spring material, and the front end portions thereof are separately bonded and fixed to the upper and lower end surfaces of the hinge piece 15b on the rear side of the hinge member 15,
Further, the rear end portions thereof are separately adhered and fixed to the upper and lower end surfaces of the rear end connecting piece 38 of the objective lens holding member 37.

As a result, most of the parallel links 39, 39 have two arms 37b, 37b of the objective lens holding member 37.
Located in between.

Thus, in the objective lens holding member 37, the optical axis of the objective lens 23 provided in the lens mounting portion 37a of the objective lens holding member 37 is positioned on the axial center of the opening 35 formed in the base substrate 2, and It is supported by the base substrate 2 via the parallel links 39, 39 and the hinge member 15.

In the objective lens holding member 37, the objective lens 23 and the balancer 25 are attached to the lens mounting portion 37a, and the rear end connecting piece 38 is formed to be considerably thick, so that the objective lens holding member 37 is substantially in the front-rear direction. The weight balance of the central portion, that is, the portion located in the front and rear with the hinge shaft of the hinge member 15 passing through is sandwiched.

Therefore, when a shock or the like is applied to the optical pickup device 1B in the tracking direction, a moving force in the tracking direction is applied to the objective lens holding member 37, but at the center of rotation of the objective lens holding member 37. Since a certain hinge axis is located so as to pass through the position of the center of gravity of the objective lens holding member 37, there is no moment that causes the objective lens holding member 37 to shift the position of the objective lens 23, and therefore the objective lens 23 is not moved in the tracking direction.

[0075]

As is apparent from the above description, in the optical pickup device of the present invention, the objective lens for converging the beam light on the recording surface of the optical disk has a focusing direction and a tracking direction orthogonal to the focusing direction. In the optical pickup device provided so as to be movable to, the objective lens mounting portion is provided at one end, and the arm portions projecting in substantially the same direction from both side portions of the mounting portion are provided. An objective lens holding member in which the outer surface of the arm portion is a coil placement portion, a support member that is placed between the two arm portions and that supports the objective lens holding member so as to be movable in the focusing direction and the tracking direction, The focusing coil is attached to the coil placement part and tracking coils are attached to the surface and wound in a rectangular shape. And Le, characterized by comprising a magnetic circuit provided for focusing and tracking coils for imparting a moving force to the objective lens in response to the drive current flowing through the focusing coil or tracking coil.

Therefore, according to the optical pickup device of the present invention, the arm portions are provided on both sides of the objective lens holding member, and the focusing coil and the tracking coil are arranged on the outer surfaces of the two arm portions, respectively, and Since the support member for movably supporting the objective lens holding member in the focusing direction and the tracking direction is arranged between the two arm portions, the support member of the movable body formed by connecting the objective lens holding member and the supporting member extends. The size in the direction can be reduced, and the optical pickup device can be downsized.

It should be noted that the specific shapes and structures shown in the above embodiments are merely examples of the implementation in implementing the optical pickup device of the present invention, and the technical scope of the present invention is thereby provided. It should not be construed as limiting.

[Brief description of drawings]

FIG. 1 shows a first embodiment of an optical pickup device of the present invention, together with FIGS. 2 to 4, and is a plan view.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged perspective view.

FIG. 4 is an exploded perspective view.

FIG. 5 shows a second embodiment of the optical pickup device of the present invention together with FIGS. 6 to 8, and is a plan view.

6 is a cross-sectional view taken along line VI-VI in FIG.

FIG. 7 is an enlarged perspective view.

FIG. 8 is an enlarged perspective view showing an exploded main part.

FIG. 9 shows a third embodiment of the optical pickup device of the present invention together with FIGS. 10 to 12, and is a plan view.

10 is a sectional view taken along line XX in FIG.

FIG. 11 is an enlarged perspective view.

FIG. 12 is a perspective view showing an exploded main part.

FIG. 13 is a schematic perspective view of a main part showing an example of a conventional optical pickup device.

[Explanation of symbols]

 1 Optical Pickup Device 7, 8, 9 Magnetic Circuit 10 Support Arm (Support Member) 19 Objective Lens Holding Member 19a Lens Mounting Part 19b Arm 19c Coil Arrangement Section 23 Objective Lens 30, 30 'Focusing Coil 31 31' Tracking Coil 1A Optical Pickup Device 32 Support arm (support member) 1B Optical pickup device 37 Objective lens holding member 37a Lens mounting part 37b Arm 37c Coil placement part 15, 39 Support member

Claims (1)

[Claims] 1. An optical pickup device provided with an objective lens for converging a light beam on a recording surface of an optical disk so as to be movable in a focusing direction and a tracking direction orthogonal to the focusing direction. An objective lens holding member having a mounting portion for the objective lens and arm portions that are substantially parallel to each other and project in the same direction from both side portions of the mounting portion, the outer surface of the arm portion being a coil disposition portion; A support member that is disposed between the two arm portions and that supports the objective lens holding member so as to be movable in the focusing direction and the tracking direction; Focusing coil that is formed and drive that flows through the focusing coil or tracking coil The optical pickup apparatus characterized by comprising a magnetic circuit provided for focusing and tracking coils for imparting a moving force to the objective lens in accordance with the flow.