JPH10162390A - Objective lens driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an objective lens driving device in which assembling holding members is easy and stable operation is obtained. SOLUTION: An objective lens driving device has a holder 2 holding an objective lens 1, a printed coil integrally constituted with the objective lens 1, springs 6, 7 in which one part is fixed to the printed soil and the other part is fixed to a fixing member 5 constituting a fixed end. In this case, the printed coil and the fixed member 5 are integrally formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording and / or recording information on an optical recording medium such as a magneto-optical disk drive, a write-once disk drive, a phase change disk drive, a CD-ROM, a DVD, an optical card, and the like. The present invention also relates to an objective lens driving device used for an information recording / reproducing device for reproducing.

[0002]

2. Description of the Related Art Magneto-optical disk drives, write-once disk drives, phase change disk drives, CD-ROs
2. Description of the Related Art In an information recording / reproducing apparatus for recording and / or reproducing various types of information on an optical recording medium such as an M or DVD, an objective lens driving device is used. And Japanese Patent Laid-Open No. 7-105
No. 552 proposes an objective lens driving device shown in FIGS.

In the objective lens driving device shown in FIGS. 11 and 12, an objective lens 103 and a coil substrate (print coil) 108 are fixed to a lens holder 105.
The coil substrate 108 is formed by laminating four thin printed boards, and the focusing coil element 119 and the tracking coil element 120 are formed as a circuit pattern. One end of the parallel link 104 made of a conductive metal wire is connected to a power supply terminal 122 of the coil substrate 108.
, And the other end is soldered to the printed circuit board 113. The printed circuit board 113 is a biaxial holder 112
The holder 112 is fixed to the base substrate 102 on the two axes. A yoke 106 is formed on the base substrate 102, and a magnet 107 magnetized in two poles is fixed to the yoke 106.

In Japanese Patent Application No. 62-105384, as shown in FIG. 13, a lens holder 132 for holding an objective lens 130, a metal wire 131, a substrate 1
40, the tracking coil 135, the focusing coil, the terminal 137, and the strips 151 and 152 on which the lead wires are printed are integrally formed with the printed coil.

[0005]

However, in the objective lens driving device disclosed in Japanese Patent Application Laid-Open No. 7-105552, one end of the parallel link 104, which is a support member for the objective lens 103, is supplied with power from a coil substrate (print coil) 108. The other end is soldered to the printed circuit board 113. This coil substrate 108
And the printed circuit board 113 are completely different members and have many parts. Further, the parallel link 104 is connected to the coil substrate 10.
8. When soldering and fixing to the printed circuit board 113, since they are different from each other, it is necessary to position and fix them by a complicated assembly jig having a three-dimensional structure for holding them. For this reason, the assembling work for fixing the parallel link 104 is very difficult.

Similarly, in Japanese Patent Application No. 62-105384, the lens holder 132, the metal wire 131, and the substrate 140 are completely separate members, have a large number of parts, and require complicated assembly jigs and tools. In addition, a power supply member to the movable portion is formed by bands 151 and 152 different from the metal wire 131. However, in the print coil, it is necessary to form the tracking coil 135 and the focusing coil with a conductive pattern at the same time. Therefore, the thickness of the conductive pattern must be increased in order to obtain drive sensitivity. For this reason,
The rigidity of the belts 151 and 152 increases, and the lens holder 13
2 is obstructed and the operation becomes unstable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an objective lens driving device which can easily assemble a supporting member in the objective lens driving device and exhibits a stable operation. With the goal.

[0008]

According to the first aspect of the present invention,
A holding member for holding the objective lens, a print coil integrally formed with the objective lens, magnetic field generating means for applying a magnetic field to the print coil, and a part supporting the objective lens so as to be movable, and a part of the print lens. In an objective lens driving device having a coil and a support member partially fixed to a fixed member forming a fixed end, the print coil and the fixed member are integrally formed. .

According to a second aspect of the present invention, in the first aspect, the support member is soldered to the print coil and the fixing member.

According to a third aspect of the present invention, in the first aspect of the present invention, the support member is fixed to both sides of the print coil.

According to the first aspect of the present invention, since the print coil and the fixing member in the objective lens driving device are integrally formed, two components including the print coil and the fixing member can be simply configured. Also, the support member can be easily attached to the print coil and the fixing member.

According to the second aspect of the present invention, since the support member is soldered to the print coil and the fixing member, the power supply member is simplified, wiring is facilitated, and assembly is facilitated. .

According to the third aspect of the present invention, since the support member is fixed to both sides of the print coil, the print coil and the objective lens can be supported using a plurality of support members.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 (Configuration) Embodiment 1 of the present invention with reference to FIGS.
Will be described in detail. FIG. 1 is a perspective view of an objective lens driving device of an information recording / reproducing device using a magneto-optical disk according to a first embodiment of the present invention as a recording medium, FIG. 2 is a partially enlarged perspective view of the objective lens driving device, and FIG. FIG. 4 is an enlarged perspective view of a base of the objective lens driving device, and FIG. 4 is a sectional view of the objective lens driving device.

Incidentally, among the coordinate axes shown in FIGS.
The direction is the tracking direction (the normal direction of the recording track, the access direction), the Y direction is the tangential direction (the tangential direction of the recording track), and the Z direction is the focusing direction (the direction perpendicular to the recording medium surface, the optical axis direction of the objective lens). Is shown.

In the first embodiment, the print coil is a coil formed by a conductive pattern of copper, aluminum, or the like formed by etching or electroforming, and the periphery thereof is formed of epoxy resin, polyimide resin, or the like. This indicates that the insulator is filled or adhered and the shape of the conductive pattern is maintained thereby, and does not mean a coil formed by winding.

An assembling process of the objective lens driving device according to the first embodiment will be described. The print coil sheet 12 shown enlarged in FIG. 2 is formed by combining two thin printed boards. The focusing coil 3 is shown in FIG.
Is formed of copper as a circuit pattern like the tracking coil element 120 of FIG. This circuit pattern is formed by etching or electroforming. The periphery of the circuit pattern is solidified with a highly rigid resin such as an epoxy resin or the like, and is formed into a highly rigid sheet as a whole. In the first embodiment, the printed coil sheet 12 forms a circuit pattern, and after being hardened with resin, is formed by arranging a plurality of two components of the holder 2 and the holding member 5 by pressing (for example, ten sets are arranged in one row). I have.

That is, the focusing coil 3, the holder 2 as a holding member including the focusing coil 3, and the fixing member 5 are simultaneously formed by the print coil sheet 12. As shown in FIG. 2, the two parts of the holder 2 and the fixing member 5 are integrally connected to the printed coil sheet 12 by connecting portions 13 respectively. The printed coil sheet 12 is provided with pilot holes 12a corresponding to the set of holders 2 and the fixing members 5, respectively.
2 is used as a reference for positioning the jig. The printed coil sheet 12 and the fixing member have the same thickness.

The holder 2 has a central hole 2 through which a light beam passes.
The b is formed, and focusing coils 3 are formed in two layers as a circuit pattern in a square shape around the b, and these are mutually connected using through holes. Terminals 2a are formed on both sides of the holder 2 on the right (X (+)) side in FIG. These two terminals 2a on both sides
Are connected to both ends of the focusing coil 3.

In FIG. 2, the left side of the fixing member 5 (X
Terminals 5a are formed on both sides of the (−)) side. In FIG. 2, a terminal 5 is provided on the upper surface on the right (X (+)) side.
Two c are formed. Each terminal 5a on both surfaces is connected to a terminal 5c.

The spring sheet 20 shown in FIG. 2 is formed by etching or pressing a conductive roll or sheet-like metal foil such as beryllium copper, copper nickel alloy, and stainless steel. The plurality of springs 6 are connected to the spring sheet 20 by connecting portions 20b and arranged in a row.
The spring sheet 21 disposed below the print coil sheet 12 is also formed by connecting the springs 7 similar to the spring sheet 20 by the connecting portions 21b. The connecting portions 20b and 21b are shifted in the X direction so as not to overlap when viewed from the Z direction. Thus, when the connecting portions 20b and 21b are cut, they can be cut without disturbing each other.

In order to assemble such an objective lens driving device, first, as shown in FIG. 2, a positioning pin 31 provided upright on a jig 30 is provided with a hole 21 provided in the spring sheet 21.
Insert and position a. The printed coil sheet 12 is positioned and mounted thereon based on the pilot hole 12a. Cream solder is applied in advance to the terminals 2a, 5a on both surfaces of the printed coil sheet 12 and the terminals 5c on the upper surface by printing.

The spring sheet 20 is positioned and mounted on the jig 31 on the printed coil sheet 12 with reference to the pilot hole 20a. Both ends of the spring 6 are located on the upper terminals 2a and 5a, and these are joined by cream solder. Both ends of the spring 7 are located on the lower terminals 2a and 5a, and these are also joined by cream solder.

Next, the terminal 5c of the fixing member 5 is
As shown in (2), the ends of the flexible printed circuit board 10 are brought into contact with each other, and then the terminals 2a, 5a are brought into close contact with the springs 6, 7 so as to sandwich the spring sheet 20 and the spring sheet 21. To do it.

As shown in FIG. 2, small holes 6b and 7b are drilled in the portions where the springs 6 and 7 are to be soldered.
From here, the solder is slightly raised to facilitate soldering and to firmly adhere. This is passed through reflow or the solder is melted by laser soldering or the like, and both ends of the springs 6 and 7 are soldered and fixed on the terminals 2a and 5a, and the terminal 5c and the flexible printed circuit board 10 are soldered.

Next, two holes 6 drilled in the middle of the spring 6
The thermosetting silicone gel 24 shown in FIGS. 1 and 4 is injected from a in FIG. 1 by a dispenser, and filled between the springs 6 and 7. Then, these are put in a high-temperature tank to cure the thermosetting silicone gel 24.

Next, the objective lens 1 is positioned and adhered to the holder 2 so that the lower step 1a is fitted into the hole 2b of the holder 2.

Next, the connecting portion 20 of the spring sheets 20 and 21
b, 21b and the connecting portion 13 of the printed coil sheet 12
Is cut by a press, a nipper cutter, or the like, to obtain a spring assembly 22 including the objective lens 1, the holder 2 (including the focusing coil 3), the springs 6, 7, the fixing member 5, and the flexible printed board 10. Also,
The movable part 23 is constituted by the objective lens 1 and the holder 2.

The base 8 shown in FIG. 3 is formed by press-forming an iron plate and plating the surface with nickel. A magnet 9 is fixed to a yoke portion 8a bent on both sides in the Y direction of the base 8. As shown in FIG. 1, the magnet 9 is magnetized such that the N poles face each other with the objective lens 1 interposed therebetween. A mounting portion 8 bent 45 degrees downward is provided on the left end of the base 8 in FIG.
c is formed, and the mirror 11 is adhered here as shown in FIG. In addition, the right end in FIG. 3 is bent upward to form two projections 8b at the tip.

The spring assembly 22 holds V-grooves 5d formed on both sides in the Y direction of the fixing member 5 with a jig (not shown), and fits two holes 5b formed in the center of the fixing member 5 into two holes 5b. The projection 8b of the base 8 is fitted and held hollow. Then, the fixing member 5 is rotated around the Y axis and the X axis by a jig with the nodal point of the objective lens 1 as the center of rotation, and the optical axis of the objective lens 1 is adjusted. Thereafter, while the position is held by the jig, the terminal formed in advance in the hole 5b of the fixing member 5 and the projection 8b are fixed by soldering.

(Operation) According to the first embodiment, when a current is applied to the focusing coil 3 via the flexible printed circuit board 10 and the springs 6 and 7, the magnet of the focusing coil 3 cooperates with the magnetic field generated by the magnet 9. 9
A driving force in the focus direction is generated on the side approaching to, and the springs 6 and 7 bend and move the movable portion 23 in the focus direction (Z direction). At this time, damping is performed by the thermosetting silicone gel 24 filled between the two springs 6 and 7.

Further, light emitted from a light source (not shown) is reflected by the mirror 11 and a hole 7a provided in the spring 7 is provided.
Is focused to an appropriate luminous flux diameter and is incident on the objective lens 1,
The light is incident on the optical disk 25, and a light spot is connected to the information recording surface to record and reproduce information.

(Effects) According to the first embodiment, the following effects can be obtained. The focusing coil 3, the holder 2, and the fixing member 5 are integrated with the print coil sheet 12,
And since they are molded at the same time, they are obtained at the same time, and mass productivity is high. A plurality of sets of spring assemblies 22 can be assembled at the same time in a state where the plurality of holders 2, the fixing member 5, and the springs 6, 7 as support members are each in a sheet shape,
Therefore, it is excellent in mass productivity. The terminals 2a and 5a are formed on the holder 2 and the fixing member 5 integrated with the print coil sheet 12, and the springs 6 and 7 as the supporting members are directly soldered and fixed. Therefore, the printed coil sheet 12 has the spring 6,
Forming a hole for inserting the 7 and inserting a spring in this hole, or fixing the printed coil sheet 12 to another member such as another plastic molded body, and positioning and fixing the support member to this another member. Is unnecessary and mass productivity is excellent.

Further, the printed coil sheet 12
The holder 2 and the fixing member 5 are formed at the same time, and one end of each of the springs 6 and 7 serving as a support member is attached to the holder 2 before separating each part.
In addition, since the other end is fixed to the fixing member 5 by soldering, it is not necessary to position the holder 2 and the fixing member 5 with a jig or the like to obtain relative positional accuracy, thereby facilitating assembly. Since the holder 2 and the fixing member 5 are formed in a sheet shape, handling is easy. Since the springs 6 and 7, which are support members, are fixed to both surfaces of the printed coil sheet 12, the support members having an interval can be easily arranged.

Since the objective lens 1 is positioned and fixed directly on the print coil sheet 12, a holding member for holding the objective lens 1 is not required, the structure is simplified, and the movable portion 23 is provided.
And the drive sensitivity is increased. Further, the objective lens driving device itself becomes lightweight. Since the hole 7a functioning as a stop (entrance pupil) of the objective lens 1 is formed in the spring 7, no other stop member is required and the configuration is simplified. In addition, since the springs 6 and 7 serving as support members also serve as power supply members,
Another power supply member is not required. Since the holder 2 is a thin printed coil, the movable portion 23 is very thin and lightweight. Further, since there is no opening in which the magnetic member enters the movable section 23, the rigidity of the movable section 23 can be increased, and the resonance frequency of the movable section 23 can be increased.

(Modifications of First Embodiment) The following examples can be given as modifications of the first embodiment. Print coil sheet 12 and spring sheets 20 and 21
Although the components are arranged in one line, a plurality of components may be arranged two-dimensionally. In addition, the objective lens 1 may be formed with a hole in the spring 6 instead of the printed coil sheet 12 and positioned and fixed there. The springs 6 and 7 are not sheet-shaped, but may be separated springs or linear wires having a circular cross section may be fixed to the sheet-shaped printed coil sheet 12. The springs 6 and 7 may be soldered after being bonded and fixed to the print coil sheet 12 in advance. Although the springs 6 and 7 are cantilevered, the springs 6 and 7 may be supported at both ends by fixing both ends to the fixing member 5 and fixing the middle to the holder 2.

Second Embodiment (Configuration) Next, a second embodiment of the present invention will be described in detail with reference to FIGS. FIGS. 5 and 6 show Embodiment 2 of the present invention, and show an objective lens driving device of an information recording / reproducing device using a magneto-optical disk as a recording medium. The same functional parts as in the first embodiment are given the same numbers,
Except for the explanation part, all (including effects and modified examples) are the same as in the first embodiment.

In the second embodiment, the objective lens 1
In the tracking (X) direction in addition to the focusing (Z) direction.

That is, the linear spring 6 formed on the spring sheet 20 (see Embodiment 1) is provided on both surfaces of the holder 2 and the fixing member 5 formed on the print coil sheet 12 (see Embodiment 1). Are soldered and fixed using the terminals 2a and 5a. A total of four springs 6 extend in the Y direction. The printed coil sheet 12 and the fixing member 5 are formed to have the same thickness.

The objective lens 2 is positioned and fixed in a hole 2b of the holder 2. A focusing coil 3 is formed on the holder 2. Two tracking coils 32 are formed on the tracking coil sheet 31 which is a print coil sheet. The tracking coil sheet 31 is also formed into a highly rigid sheet like the holder 2.

The lower portion of the tracking coil sheet 31 is fitted into a concave portion 2d formed on both sides in the Y direction of the holder 2, and the terminals 31a of the tracking coil sheet 31 and the terminals 2c of the holder 2 are soldered and fixed vertically, and tracking is performed. The coil sheet 31 and the holder 2 are electrically connected. The terminals of the tracking coil sheet 32 are connected to two terminals out of a total of four terminals 2 a formed on both surfaces of the holder 2 through wires formed on the holder 2. The terminals of the focusing coil 3 are connected to two of a total of four terminals 2 a formed on both surfaces of the holder 2 through wires formed on the holder 2. The tracking coil sheet 32 and the focusing coil 3 are supplied with power through the spring 6.

(Function) Flexible printed circuit board 10
When an electric current is applied to the focusing coil 3 via the spring 6 and the holder 2, a driving force in the focusing direction is generated on the side of the focusing coil 3 close to the magnet 9 in cooperation with the magnetic field generated by the magnet 9, and the spring 6 is bent. Movable part 2
3 is moved in the focus direction (Z direction).

The flexible printed board 10, the spring 6,
Via the holder 2 and the tracking coil sheet 31,
When a current is applied to the tracking coil 32, the magnet 9
The driving force in the tracking direction is generated on the side 32a of the tracking coil 32 close to the magnet 9 in cooperation with the generated magnetic field, and the spring 6 bends to move the movable portion 23 in the tracking direction (X direction).

(Effects) According to the second embodiment, the following effects can be obtained. A print coil on which a tracking coil was directly formed was fixed by soldering to a print coil (holder) 2 on which a focusing coil 3 was formed. For this reason, a relay board or the like for connecting a plurality of coils is unnecessary, the configuration is simplified, and the size and weight are reduced. Terminals 2c are formed on both surfaces of the holder 2, and a printed coil sheet 31 is soldered to the terminals 2c. For this reason, other members for electrically connecting the holder 5 and the print coil or between the print coil and the spring 6 serving as a power supply member are not required, and the configuration is simplified, and the size and the weight are reduced.

Third Embodiment (Configuration) Next, a third embodiment of the present invention will be described in detail with reference to FIGS. The third embodiment shown in FIGS. 7 to 10 shows an objective lens driving device of an information recording / reproducing device using a magneto-optical disk as a recording medium, as in the first embodiment. 7 to 10, the same functional parts as those in the first embodiment are denoted by the same reference numerals, and all parts (including effects and modified examples) other than the explanation part are the same as in the first embodiment.

In the third embodiment, the objective lens 1 can be supported and driven in the tracking (X) direction in addition to the focusing (Z) direction.

That is, the print coil 42 formed on the print coil sheet 12 (refer to the first embodiment) and the one side of the fixing member 5 are provided with the linear spring 6 formed on the spring sheet 20 (refer to the first embodiment). Both ends are fixed by soldering using the terminals 42a and 5a. The printed coil sheet 12
And the fixing member 5 are formed to have the same thickness.

The conductive sheet 45 is provided on the spring sheet 20.
And one end of the conducting wire 45 is connected to the terminal 42.
b. Thereafter, the spring 6 and the conducting wire 45 are separated from the spring sheet 20 at the connecting portion 20b, and the printed coil 42 and the fixing member 5 are separated from the printed coil sheet 12 at the connecting portion 20b to obtain an assembly 45 as shown in FIG. .

That is, one print coil 42 has two layers, and two focusing coils 3 are formed in the layer on the spring 6 side in the Z direction. One tracking coil 32 is formed in a layer below it. The objective lens 1 is positioned and fixed in a hole of a holder 44 made of plastic.

The assembly 45 has a hole 42c of the print coil 42 and a boss 44 on the side of the holder 44 shown in FIG.
a. Positioning and bonding. In addition, the hole 5e of the fixing member 5 is fitted into the boss 41a on the side surface of the base 41 shown in FIG. Then, the holder 44 and the base 41 are sandwiched by both sets of spring assemblies 45 from both sides in the X direction.

The free end 45c of the conducting wire 45a of the right print coil 42 in the X direction shown in FIG. 10 is bent in the X direction, and the lower terminal 42 of the left print coil 42 in the X direction is bent.
e, and similarly, the free end 45d of the conducting wire 45b of the print coil 42 on the left side in the X direction is bent in the X direction and soldered to the upper terminal 42f of the print coil 42 on the right side in the X direction. The tracking coils are electrically connected to each other between the focusing coils 3 formed on the two print coils 42 by the two conductors 45a.

The two yokes 43 are connected to the print coil 42
, And is fixed to a carriage (not shown). A magnet 9 is provided inside the yoke 43 bent in a U-shape.
Has been fixed. The magnet 9 is positioned so as to face the inner side 3a of the two focusing coils 3 with a space therebetween.

Current is supplied to a total of four focusing coils 3 and two tracking coils 32 through four springs 6.

(Operation) FIG. 9 shows a magnetic field acting on the focusing coil 3. When a current is applied to the focusing coil 3, the inner side 3 a of the focusing coil 3 near the magnet 9 cooperates with the magnetic field generated by the magnet 9.
Then, a driving force Ff in the focus direction is generated, and the spring 6 bends to move the movable portion 23 in the focus direction (Z direction).

FIG. 8 shows a partial cross section in the Z direction of the tracking coil 32 on the left side in the X direction shown in FIG.
The print coil 42 is sandwiched between the side portions 43a on both sides of the yoke 43 from the Y direction. The magnetic flux generated from the magnet 9 goes in the X direction near the center of the magnet 8 as shown in FIG. 8, while the magnetic flux near the side portion 43a goes in the Y direction so as to go to the side portion 43a. Therefore, the side 32a of the tracking coil 32 located in the Y direction
A force in the direction Ft as shown in FIG. 8 is generated, and the resultant force is X
Turn in the direction.

Therefore, when a current is applied to the tracking coil 32 via the spring 6, a driving force in the tracking direction is generated on the side 32a of the tracking coil 3 close to the magnet 9 in cooperation with the magnetic field generated by the magnet 9, and 6
Moves the movable portion 23 in the tracking direction (X direction).

(Effect) According to the third embodiment, since the focusing coil 3 and the tracking coil 32 are formed in the same print coil, the configuration is simplified. Also,
The objective lens 1 is a holder 2 separate from the print coil.
, The degree of freedom for fixing the objective lens 1 is increased.

Further, since the magnetic flux from the magnet 9 is bent in the Y direction by the side portion 43a, the tracking coil 32 is arranged in the X direction of the movable portion 23,
Further, the magnet 9 can also be arranged in the X direction of the tracking coil 32. Therefore, the printed coil on which the tracking coil 32 and the focusing coil 3 are formed is referred to as YZ.
The spring 6 can be fixed to the surface of the print coil so as to extend in the Y direction (a direction parallel to the surface of the print coil).

(Modification of Each of the Above Embodiments) The support member may be another member such as a wire, and the number thereof may be one or more. Further, the objective lens 1 may be a hologram. The objective lens 1 and the holder 2 may be formed integrally. Further, a light source such as a laser may be integrally formed with the movable portion.

The present invention includes the following configuration. 1. A holding member for holding the objective lens, a print coil integrally formed with the objective lens, a magnetic field generating means acting on the print coil, and a part supporting and movably supporting the objective lens. An objective lens driving device comprising a support member having a portion fixed to a fixing member, wherein the print coil and the fixing member are integrally formed. With this configuration, since the fixing member of the print coil and the support member is integrally formed, it is easy to obtain a component, and the effect that the support member is easily fixed to both the print coil and the fixing member. Can be obtained.

[0061] 2. 2. The objective lens driving device according to the item 1, wherein the support member is soldered to the print coil and the fixing member. With this configuration, since the support member is soldered to the print coil and the fixing member, a separate member for wiring from the print coil to the support member, which is a power supply member, is not required, so that the assembly is easy, the configuration is simplified, and the size is reduced. , Weight reduction becomes possible. In addition, since a highly rigid print coil is not used as a power supply member from the fixed portion to the movable portion, an effect is obtained that the movement of the movable portion is not hindered.

3. 2. The objective lens driving device according to the item 1, wherein the support member is fixed to both surfaces of the print coil. With this configuration, it is possible to obtain an effect that the plurality of support members can be easily arranged to be spaced apart from each other without using other members.

4. 2. The objective lens driving device according to claim 1, wherein the support member separates the print coil from the print coil sheet after fixing the plurality of support members to the print coil sheet on which the print coil is formed. With this configuration, when the support member is fixed to the print coil, the print coil has a sheet-like shape, so that the plurality of print coils can be easily positioned and the support member is easily fixed.

5. A holding member for holding the objective lens, a print coil integrally formed with the objective lens, a magnetic field generating means acting on the print coil, a part of the print coil that movably supports the objective lens,
An objective lens driving device comprising a support member partially fixed to a fixing member, wherein the objective lens is directly fixed to the print coil. With this configuration, since the member for fixing the objective lens and the print coil are also used, the number of parts is reduced,
It becomes smaller and lighter. Further, since the positional accuracy of the objective lens with respect to the print coil is good, an effect that accurate driving can be performed can be obtained.

6. An objective lens driving device having a holding member for holding the objective lens, a print coil integrally formed with the objective lens, a magnetic field generating means acting on the print coil, and a support member movably supporting the objective lens , Wherein the holding member is the print coil. With this configuration, by using a printed coil as the holding member, it is possible to obtain an effect that the number of components is small and the movable portion is reduced in size and weight.

7. In an objective lens driving device having a holding member for holding the objective lens, a coil integrally formed with the objective lens, a magnetic field generating means acting on the coil, and a support member movably supporting the objective lens, An objective lens driving device, wherein an aperture of the objective lens is formed in a part of the support member. With this configuration, since the aperture is formed on the support member, an effect is obtained in that the movable section can be reduced in size and weight because other members forming the aperture are unnecessary.

8. An objective having a holding member for holding the objective lens, at least two print coils integrally formed with the objective lens, magnetic field generating means acting on the print coil, and a support member for movably supporting the objective lens; An objective lens driving device, wherein the at least two print coils are directly soldered to each other. According to this configuration, by directly soldering a plurality of print coils, a power distribution member for electrically connecting the print coils is not required, and the mechanical fixing of the print coils and the electrical connection can be performed at the same time, so that the movable portion is provided. Can be simplified, the assembly is easy, and the movable portion can be reduced in size and weight.

9. An objective lens driving device having a holding member for holding the objective lens, a print coil integrally formed with the objective lens, a magnetic field generating means acting on the print coil, and a support member movably supporting the objective lens 3. The objective lens driving device according to claim 1, wherein the print coil is soldered to a terminal formed on a surface of the holding member. This configuration eliminates the need for a power distribution member that is electrically connected to the print coil, enables mechanical fixation and electrical connection of the print coil at the same time, simplifies the configuration of the movable section, facilitates assembly, and reduces the movable section. The effect of being small and lightweight can be obtained.

10. A holding member for holding the objective lens,
A print coil integrally formed with the objective lens,
An objective lens driving device comprising: a magnetic field generating means for applying a magnetic field to the print coil; and a support member having one end fixed to the print coil and the other end fixed to a fixed member forming a fixed end. The objective lens driving device, wherein the member is formed of the same material and is disposed on the same virtual plane parallel to the extending direction of the support member.

(Effect) The mass productivity of the print coil and the fixing member is improved, and the number of assembling steps of the objective lens driving device can be simplified.

11. A holding member for holding the objective lens,
A print coil integrally formed with the objective lens,
An objective lens driving device comprising: a magnetic field generating means for applying a magnetic field to the print coil; and a support member having one end fixed to the print coil and the other end fixed to a fixed member forming a fixed end. The objective lens driving device, wherein the member is formed of the same material and is disposed on the same virtual plane parallel to the extending direction of the support member.

(Effect) The mass productivity of the print coil and the fixing member is improved, and the number of assembling steps of the objective lens driving device can be simplified.

12. A holding member for holding the objective lens,
A print coil integrally formed with the objective lens,
An objective lens driving device comprising: a magnetic field generating means for applying a magnetic field to the print coil; and a support member having one end fixed to the print coil and the other end fixed to a fixed member forming a fixed end. The objective lens driving device, wherein the members are formed of the same material and have the same thickness.

(Effect) The fixing of the support member is facilitated, and the number of assembling steps is simplified.

13. A holding member for holding the objective lens,
A print coil integrally formed with the objective lens,
An objective lens driving device comprising: a magnetic field generating means for applying a magnetic field to the print coil; and a support member having one end fixed to the print coil and the other end fixed to a fixed member forming a fixed end. The member is
An objective lens driving device characterized by being formed of the same material and having the same thickness.

(Effect) The fixing of the support member is facilitated, and the number of assembling steps is simplified.

14. A holding member for holding the objective lens,
A print coil integrally formed with the objective lens,
An objective lens driving device comprising: a magnetic field generating means for applying a magnetic field to the print coil; and a support member having one end fixed to the print coil and the other end fixed to a fixed member forming a fixed end. The objective lens driving device, wherein the members are formed of the same material and have the same thickness.

(Effect) The fixing of the support member is facilitated, and the number of assembling steps is simplified.

[0079]

According to the present invention described above, the following effects can be obtained. According to the first aspect of the present invention, the print coil and the fixing member of the support member are integrally formed. Therefore, it becomes easy to obtain parts.

According to the second aspect of the present invention, since the support member is soldered to the print coil and the fixing member, there is no need for a separate member for wiring from the print coil to the support member which is a power supply member. Therefore, easy assembly, simple configuration, small size,
lightweight. Further, since the rigid pudding and the coil are not used as the power supply member from the fixed portion to the movable portion, the movement of the movable portion is not hindered.

According to the third aspect of the present invention, the support member is fixed to both sides of the print coil. Therefore, it is easy to arrange the plurality of support members apart from each other without using other members.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an objective lens driving device according to a first embodiment of the present invention.

FIG. 2 is an exploded enlarged perspective view of the objective lens driving device according to the first embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a base in the objective lens driving device according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of the objective lens driving device according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing an objective lens driving device according to a second embodiment of the present invention.

FIG. 6 is an exploded perspective view of the objective lens driving device according to the second embodiment of the present invention.

FIG. 7 is a perspective view showing an objective lens driving device according to a third embodiment of the present invention.

FIG. 8 is a sectional view of an objective lens driving device according to a third embodiment of the present invention.

FIG. 9 is a diagram illustrating a state of a magnetic field acting on a focusing coil according to a third embodiment of the present invention.

FIG. 10 is an exploded perspective view of an objective lens driving device according to a third embodiment of the present invention.

FIG. 11 is a perspective view of a conventional objective lens driving device.

FIG. 12 is a plan view showing a coil element of a conventional objective lens driving device.

FIG. 13 is a perspective view showing another example of the conventional objective lens driving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Objective lens 2 Holder 3 Focusing coil 5 Holding member 6 Spring 7 Spring 8 Base 9 Magnet 10 Flexible printed board 11 Mirror 12 Print coil sheet 20 Spring sheet 21 Spring sheet 22 Spring assembly 23 Movable part 25 Optical disk

Claims (3)

[Claims] 1. A holding member for holding an objective lens, a print coil integrated with the objective lens, magnetic field generating means for applying a magnetic field to the print coil, and a movable support for the objective lens, In an objective lens driving device having a part fixed to the print coil and a part fixed to a fixed member forming a fixed end, the print coil and the fixed member are integrally formed. Objective lens driving device. 2. The objective lens driving device according to claim 1, wherein the support member is soldered to the print coil and the fixing member. 3. The objective lens driving device according to claim 1, wherein the support member is fixed to both surfaces of the print coil.