JP2000123380A - Object lens driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress resonance caused by expansion and contraction of a wire in the longitudinal direction and to prevent a moving part from coming off the servo caused by the resonance at the time of moving the moving part in the direction of the track and focus with respect to an object lens driving device where a fixed part and a moving part mounted with an object lens are coupled to each other with plural wires. SOLUTION: A fixed part 12 is provided with damper members 14 and wires 3 are held with these damper members 14. Further, the fixed part 12 is provided with a projecting part 15 projecting on the opposite side of the moving part arranged on the fixed part 12, and an FPC substrate 16 is mounted on this projecting part 15, and the tip parts of the wires 3 are soldered on the FPC substrate 16. Thus, it is possible to hold the wires 3 with a damping characteristic and elasticity in the longitudinal direction, and it is possible to suppress resonance of the wires 3 and the moving part 2 caused by longitudinal expansion and contraction of the wires 3 when the moving part 2 moves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an objective lens driving device for driving an objective lens in a focus direction and a track direction.

[0002]

2. Description of the Related Art An example of an objective lens driving device used in an optical disk drive or the like is shown in FIGS.
2 will be described. The objective lens driving device includes a fixed portion 1 fixed to a base member (not shown), a movable portion 2
The fixed part 1 and the movable part 2 are connected by four wires 3. An objective lens 4, a track coil 5, and a focus coil 6 are attached to the movable section 2. Further, the movable portion 2 has an opening 7 into which a magnet (not shown) attached to the base member enters when the fixed portion 1 is fixed to the base member.
The magnet that has entered faces the coils 5 and 6.

In a state where the fixing section 1 is fixed to the base member, a rising mirror 8 is arranged below the objective lens 4. The rising mirror 8 guides the laser light emitted from the laser diode 9 and passing through the collimator lens 10 toward the objective lens 4. An optical pickup is constituted by the rising mirror 8, the laser diode 9, the objective lens driving device described above, and the like.

After the fixed portion 1 is fixed to the base member and the track coil 5 and the focus coil 6 are opposed to the magnets, the coils 5 and 6 are energized so that the gap between the coils 5 and 6 and the magnets is reduced. As a result, a thrust is generated, and the movable part 2 moves integrally with the objective lens 4 in the track direction or the focus direction by bending the wire 3. An arrow “F” indicates a thrust generated when the track coil 5 is energized.

[0005] In recent years, there has been an increasing need to mount an optical disk drive in a notebook personal computer, and there is a demand for a thinner optical disk drive. As the optical disk drive becomes thinner, the optical pickup is also required to be thinner. However, in an optical pickup using the objective lens driving device having the above-described structure, as shown in FIG.
The thickness dimension “H” becomes large, and it is impossible to meet the demand for thinning.

Therefore, in order to meet the demand for thinning, an objective lens driving device having the structure shown in FIGS. 13 and 14 has been widely used. The basic structure of this objective lens driving device is the same as that of the objective lens driving device shown in FIGS.
And a movable part 11. These fixed part 1 and movable part 1
1 are connected by four wires 3. The objective lens 4, the track coil 5, and the focus coil 6 are attached to the movable section 11. Further, the movable portion 11 has an opening 7 into which a magnet (not shown) attached to the base member enters when the fixed portion 1 is fixed to the base member.

The different points are the shape of the movable part 11 and the mounting positions of the track coil 5 and the focus coil 6. A concave portion is formed in the movable portion 11 below the objective lens 4, and a rising mirror 8 is arranged in the concave portion. The mounting positions of the track coil 5 and the focus coil 6 are biased to one side of the objective lens 4.

[0008]

In the objective lens driving device shown in FIGS. 13 and 14, since the mounting positions of the track coil 5 and the focus coil 6 are deviated to one side of the objective lens 4, the movable portion 11 and the objective Lens 4 and coil 5,
It is difficult to match the position of the center of gravity of the entire movable portion 11 including the position 6 with the position where the thrust is generated when the track coil 5 is energized. For example, as shown in FIG. 13A, the movable unit 11 including the objective lens 4 and the coils 5 and 6
The position of the center of gravity “G” as a whole and the position where the thrust “F” is generated when the track coil 5 is energized are shifted by “ΔL”.

When the movable portion 11 is moved in the track direction due to the shift of "ΔL", the movable portion 11 rotates in the direction of arrow "A", and the wire 3 moves in the longitudinal direction with the rotation. The resonance occurs in the wire 3 and the movable portion 11 due to the expansion and contraction. Then, due to the occurrence of the resonance, when the movable portion 11 is moved in the track direction, the servo is disengaged, and the data is damaged during recording and reproduction.

In the objective lens driving device shown in FIGS. 13 and 14, the position of the center of gravity "G" of the entire movable section 11 including the objective lens 4 and the coils 5 and 6 is determined when the focus coil 6 is energized. Is shifted from the thrust generation position, the wire 3 expands and contracts in the longitudinal direction even when the movable section 11 is moved in the focus direction, and resonance occurs due to the expansion and contraction.

Accordingly, the present invention is directed to a method for moving a movable portion, which is connected to a fixed portion with a plurality of wires and has an objective lens attached thereto, in a track direction or a focus direction in a longitudinal direction. It is an object of the present invention to provide an objective lens driving device capable of suppressing the resonance caused by the resonance and preventing the movable portion from being deviated from the servo due to the resonance.

[0012]

According to the first aspect of the present invention,
Having a fixed portion and a movable portion holding a coil facing the objective lens and the magnet, connecting the fixed portion and the movable portion with a plurality of wires, and energizing the coil via the wires. In the objective lens driving device, the objective lens is driven integrally with the movable portion in the focus direction and the track direction, a damper member is provided on the fixed portion, the wire is held by the damper member, and the fixed A protruding portion protruding to the side opposite to the side on which the movable portion was arranged was provided on the portion, an FPC board was attached to the protruding portion, and a tip of the wire was soldered to the FPC board.

Accordingly, one end of the wire on the fixed portion side is held with damping characteristics by a damper member provided on the fixed portion, and is also soldered to a flexible FPC board. Even if the movable part rotates when the part is moved in the track direction or focus direction,
The extension and contraction of the wire in the longitudinal direction due to the rotation and the resonance of the wire and the movable portion caused by the extension and contraction can be suppressed.

According to a second aspect of the present invention, in the objective lens driving device according to the first aspect, the FPC board includes:
A bending portion is provided between the soldering portion of the wire and the attachment portion to the protrusion, the bending portion being easily bent along the longitudinal direction of the wire.

Accordingly, the FPC board is more easily bent along the longitudinal direction of the wire, and is caused by the longitudinal expansion and contraction of the wire when the movable part is moved in the track direction or the focus direction. Resonance of the wire and the movable part is further suppressed.

According to a third aspect of the present invention, in the objective lens driving device according to the first or second aspect of the present invention, a damper sheet and a spring plate are joined to the FPC board in surface contact, and the spring plate is connected to the FPC board. A through hole through which the wire was inserted without contact was formed.

Accordingly, the damper sheet and the spring plate are joined to the FPC board in a surface contact state and attached to a fixed portion, and one end of a wire is soldered to the FPC board, so that the FPC board and the damper sheet are connected. The seat and the spring plate can hold the wire with damping characteristics and flexibility in the longitudinal direction of the wire. For this reason, the expansion and contraction of the wire in the longitudinal direction and the resonance of the wire and the movable portion caused by the expansion and contraction are effectively suppressed.
In addition, since the damper sheet and the spring plate function as a damper member, it is possible to omit the damper member provided on the fixing portion.

According to a fourth aspect of the present invention, there is provided a fixed portion and a movable portion holding a coil facing the objective lens and the magnet, wherein the fixed portion and the movable portion are connected by a plurality of wires, In an objective lens driving device configured to drive the objective lens integrally with the movable portion in the focus direction and the track direction by energizing the coil through the wire, a through hole is formed in the fixed portion, A cylindrical damper member is inserted into the through hole, the wire is inserted into the cylindrical damper member, and a gel damper member is injected, and the tip of the wire on the side through which the cylindrical damper member is inserted is FPC. Solder to the board, this FP
The back surface of the C substrate was brought into contact with the end of the cylindrical damper member.

Accordingly, one end of the wire on the fixed portion side is held with a damping characteristic by the cylindrical damper member and the gel damper member provided on the fixed portion, and is attached to the flexible FPC board. Because it is soldered,
Even if the movable part rotates when the movable part is moved in the track direction or the focus direction, the extension and contraction of the wire in the longitudinal direction due to the rotation and the resonance of the wire and the movable part due to the extension and contraction are suppressed. Can be. Further, since the attachment of the FPC board to the fixed portion is performed by bringing the back surface of the FPC board into contact with the end of the cylindrical damper member,
The extension and contraction of the wire in the longitudinal direction due to the rotation of the movable portion and the resonance of the wire and the movable portion caused by the extension and contraction can be further suppressed.

According to a fifth aspect of the present invention, in the objective lens driving device of the fourth aspect, a concave groove is formed in at least one of an inner peripheral portion of the through hole and an outer peripheral portion of the cylindrical damper member. A gel damper member was injected into the groove.

Accordingly, the gel damper member injected into the concave groove has an adhesive effect, and a positional displacement between the cylindrical damper member and the fixed portion and a chatter vibration between the cylindrical damper member and the fixed portion. Is prevented.

According to a sixth aspect of the present invention, there is provided a fixed portion, and a movable portion holding a coil facing the objective lens and the magnet, wherein the fixed portion and the movable portion are connected by a plurality of wires, In the objective lens driving device configured to drive the objective lens in the focus direction and the track direction integrally with the movable portion by energizing the coil through the wire, the movable portion is disposed on the fixed portion. Attach a damper member protruding to the opposite side to the opposite side, attach a hard type PC board to this damper member, form an insertion hole through which the wire is inserted in the fixed part, and attach a gel-like damper member to this insertion hole. The tip of the wire that had been injected and passed through the insertion hole was soldered to the PC board.

Accordingly, one end of the wire on the fixed portion side is held with a damping characteristic by the gel damper member injected into the insertion hole of the fixed portion, and held by the flexible damper member. Since the movable part is rotated when the movable part is moved in the track direction or the focus direction since the movable part is moved to the track direction or the focus direction, the wire expands and contracts in the longitudinal direction due to the rotation. Resonance of the wire and the movable part due to expansion and contraction can be suppressed. Further, by using a hard type PC board, the workability when attaching the PC board to the damper member and when soldering the wires is improved.

[0024]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. 11 to FIG.
4, the same parts as those described in FIG.
The description is also omitted (the same applies hereinafter). This objective lens driving device has the same basic structure as the objective lens driving device shown in FIGS. 13 and 14, and has a fixed portion 12 fixed to a base member (not shown) and a movable portion 11. These fixed part 12 and movable part 11 are connected by four wires 3. The objective lens 4, the track coil 5, and the focus coil 6 are attached to the movable section 11. Further, the movable portion 11 has an opening 7 into which a magnet (not shown) attached to the base member enters when the fixed portion 1 is fixed to the base member.

The fixing portion 12 is formed with four insertion holes 13, and the wires 3 are inserted into these insertion holes 13. These wires 3 are gel-like dampers which are damper members injected into the insertion holes 13. Member 14 is held by, for example, silicon.

Further, the fixing portion 12 is integrally formed with a projection 15 projecting to the side opposite to the side on which the movable portion 11 is arranged, and an FPC board 16 is fixed to the projection 15 by screws 17. The distal end of the wire 3 inserted into the insertion hole 13 and held by the gel damper member 14 is soldered to the FPC board 16, and the wire 3 is positioned by the soldering.

In such a configuration, when the movable part 11 is moved in the track direction or the focus direction by energizing the track coil 5 and the focus coil 6, the entire movable part 11 including the coils 5, 6 and the objective lens 4 is moved. And the thrust “F” at the coils 5 and 6
The movable portion 11 rotates when the position where the occurrence of the error occurs is displaced. This rotation causes the wire 3 to expand and contract in the longitudinal direction.

However, one end of the wire 3 on the fixed portion 1 side is held with a damping effect by the gel damper member 14 injected into the insertion hole 13 of the fixed portion 1, and
The distal end of the wire 3 is soldered to a flexible FPC board 16. For this reason, even if the movable part 11 rotates, expansion and contraction of the wire 3 in the longitudinal direction accompanying the rotation and resonance of the wire 3 and the movable part 11 due to the expansion and contraction are suppressed.

Accordingly, it is possible to prevent the movable portion 11 from rotating largely due to the resonance of the wire 3 and the movable portion 11, thereby causing the movable portion 11 to deviate from the servo. Can be prevented.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. The objective lens driving device according to the present embodiment has the same basic structure as the objective lens driving device shown in FIGS. 1 and 2, and the shape of the FPC board 18 is different. The FPC board 18 has a bent portion 19 formed between the soldered portion of the wire 3 and the portion attached to the protrusion 15 so as to be easily bent along the longitudinal direction of the wire 3. The bending portion 19 is formed by forming a part of the FPC board 18 into a thin band along the wiring pattern.

In such a configuration, the FPC board 18
Is easily bent along the longitudinal direction of the wire 3. For this reason, when the movable part 2 is moved in the track direction or the focus direction, the expansion and contraction of the wire 3 in the longitudinal direction and the resonance of the wire 3 and the movable part 2 due to the expansion and contraction are further suppressed.

Next, a modification of the second embodiment of the present invention will be described with reference to FIG. In this embodiment, the FPC
The dimension between the soldering portion of the wire 3 and the portion attached to the protrusion 15 is increased by making the bending portion 19a formed on the substrate 18 U-shaped.

Thus, the bending portion 19a is connected to the wire 3
Are more easily bent along the longitudinal direction, and the expansion and contraction of the wire 3 in the longitudinal direction and the resonance of the wire 3 and the movable portion 2 caused by the expansion and contraction are further suppressed.

Next, another modified example of the second embodiment of the present invention will be described with reference to FIG. In the present embodiment, F
The PC board 18 is formed with a bent portion 19b bent like a leaf spring.

As a result, the bent portion 19b is connected to the wire 3
Are more easily bent along the longitudinal direction, and the expansion and contraction of the wire 3 in the longitudinal direction and the resonance of the wire 3 and the movable portion 2 caused by the expansion and contraction are further suppressed.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. The objective lens driving device according to the present embodiment includes a damper sheet 20 and a spring plate 2 formed in substantially the same shape as the FPC board 18 with respect to the FPC board 18.
1 are superposed and joined in a surface contact state, and this joined product is screwed to the projection 15 (see FIG. 1) of the fixing portion 12. The spring plate 21 has a through hole 22 through which the wire 4 is inserted without contact. The tip of the wire 4 is soldered to the FPC board 18.

In such a configuration, the FPC board 18
The damper sheet 20 and the spring plate 21 are superposed and joined to each other in a surface contact state, and attached to the fixed portion 12 to expand and contract the wire 3 in the longitudinal direction and to cause resonance of the wire 3 and the movable portion 2 due to the expansion and contraction. Is effectively suppressed.

Since the damper sheet 20 and the spring plate 21 function as a damper member, the gel-like damper member 14 injected into the insertion hole 13 of the fixing portion 1 is used.
Can be omitted. By omitting the gel damper member 14, the assembling work of the objective lens driving device is simplified.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the objective lens driving device of the present embodiment, four through-holes 23 are formed in the fixed part 12, and a cylindrical vibration-proof rubber 24, which is a cylindrical damper member, is inserted into these through-holes 23. Wire 3 in anti-vibration rubber
Is inserted. Further, a large-diameter concave portion 25 is formed at one end side in the cylindrical vibration-isolating rubber 24, and a gel-like damper member 26 such as silicon is injected into the concave portion 25.

The distal end of the wire 3 into which the cylindrical vibration-isolating rubber 24 has been inserted is soldered to the FPC board 16, and the rear surface of the FPC board 16 has the rear surface protruding from the through hole 23.
4 is in contact with the end.

In such a configuration, the end of the wire 3 on the side of the fixing portion 12 is held with a damping characteristic by the cylindrical vibration-isolating rubber 24 and the gel-like damper member 26, and the tip of the wire 3 is flexible. Since the movable portion 11 is rotated when the movable portion 11 is moved in the track direction or the focus direction because the flexible portion is soldered to the flexible FPC board 16, the longitudinal direction of the wire 3 accompanying the rotation is changed. To the wire 3 and the movable portion 11
Can be suppressed.

Further, the mounting of the FPC board 16 to the fixing portion 12 is performed by attaching the rear surface of the FPC board 16 to the cylindrical vibration isolating rubber 24.
Of the FP
The C substrate 16 is easily bent along the longitudinal direction of the wire 3. For this reason, when the movable part 2 is moved in the track direction or the focus direction, the expansion and contraction of the wire 3 in the longitudinal direction and the resonance of the wire 3 and the movable part 2 due to the expansion and contraction are further suppressed.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
It will be described based on. The basic structure of the objective lens driving device of the present embodiment is the same as that of the objective lens driving device described with reference to FIG. The difference is that a ring-shaped concave groove 27 is formed on the inner peripheral portion of the through hole 23, a ring-shaped concave groove 28 is formed on the outer peripheral portion of the cylindrical vibration-isolating rubber 24, and the cylindrical vibration-proof groove is formed on the through-hole 23. The point is that when the rubber 24 is inserted, the groove 27 and the groove 28 are opposed to each other, and a gel-like damper member 29 such as silicon is injected into the grooves 27 and 28.

In such a configuration, the grooves 27, 28
Due to the adhesive effect of the gel damper member 29 injected into the inside, the positional displacement of the cylindrical anti-vibration rubber 24 along the longitudinal direction of the wire 3 is prevented. Chatter vibration between them is prevented. Accordingly, the reliability when moving the movable section 2 in the track direction or the focus direction is further improved.

Next, a sixth embodiment of the present invention will be described with reference to FIG.
A description will be given based on FIG. In the objective lens driving device of the present embodiment, a concave portion 30 is formed on the fixed portion 12 on the side opposite to the side on which the movable portion 2 is arranged.
Is fitted with an H-shaped anti-vibration rubber 31 which is a damper member. The H-shaped anti-vibration rubber 31 is integrally formed with a projection 32, and the projection 32 is formed of a hard-type PC board 3.
3 is fitted in the fitting hole 34 formed.

Further, the fixing portion 12 has four insertion holes 13.
Are formed, and the wires 3 are inserted through these insertion holes 13, and these wires 3 are held by a gel-like damper member 14 such as silicon injected into the insertion holes 13. The distal end of the wire 3 inserted into the insertion hole 13 and held by the gel damper member 14 is soldered to the PC board 33.

In such a configuration, one end of the wire 3 on the fixed portion 12 side is held with damping characteristics by the gel damper member 14 injected into the insertion hole 13 of the fixed portion 12, and Since it is soldered to the hard type PC board 33 attached to the flexible H-shaped anti-vibration rubber 31 fitted to 30, when the movable part 2 is moved in the track direction or the focus direction Even if the movable part 2 rotates, the extension and contraction of the wire 3 in the longitudinal direction due to the rotation and the resonance of the wire 3 and the movable part 2 due to the extension and contraction can be suppressed. Further, by using the hard type PC board 33,
The workability when attaching the PC board 33 to the H-shaped anti-vibration rubber 31 and when soldering the wire 3 is improved, so that the manufacturing cost is reduced and the durability is improved.

[0048]

According to the first aspect of the present invention, one end of the wire supporting the movable portion holding the objective lens is held by the damper member provided on the fixed portion, and is attached to the projection of the fixed portion. By soldering to the FPC board
The wire can be held with damping properties and flexibility in the longitudinal direction of the wire. Therefore, even if the movable part rotates when the movable part is moved in the track direction or the focus direction, the wire expands and contracts in the longitudinal direction due to the rotation, and resonance of the wire and the movable part due to the expansion and contraction occurs. Can be suppressed, and the servo can be prevented from coming off the movable portion due to resonance, and the reliability of moving the movable portion in the track direction or the focus direction can be improved.

According to the second aspect of the present invention, in the first aspect of the present invention, the FPC board is disposed between the soldering portion of the FPC board and the attaching portion to the protrusion in the longitudinal direction of the wire. Since the flexible portion has a flexure portion that is easily flexed along, it is possible to further suppress the expansion and contraction of the wire in the longitudinal direction when the movable portion is moved in the track direction or the focus direction and the resonance of the wire and the movable portion due to the extension and contraction, The reliability when moving the movable section in the track direction or the focus direction can be further improved.

According to the third aspect of the present invention, in the first or second aspect of the invention, the damper sheet and the spring plate are joined to the FPC board in a surface contact state, so that the wire does not contact the spring plate. Is formed, the wire can be held with the damping characteristic and the flexibility in the longitudinal direction of the wire by the FPC board, the damper sheet and the spring plate. For this reason, the expansion and contraction of the wire in the longitudinal direction and the resonance of the wire and the movable part caused by the expansion and contraction can be effectively suppressed, and the reliability of moving the movable part in the track direction or the focus direction can be increased. In addition, since the damper sheet and the spring plate function as a damper member, it is possible to omit the damper member provided on the fixing portion, and it is possible to simplify the structure.

According to the fourth aspect of the present invention, one end of the wire on the fixed portion side is held with a damping characteristic by the cylindrical damper member and the gel damper member provided on the fixed portion, and is flexible. Since the movable part is rotated when the movable part is moved in the track direction or the focus direction because of the soldering to the FPC board having the Therefore, the resonance of the wire and the movable portion due to the resonance can be suppressed, the servo can be prevented from being removed from the movable portion due to the resonance, and the reliability of moving the movable portion in the track direction or the focus direction can be improved. Further, since the attachment of the FPC board to the fixed portion is performed by bringing the back surface of the FPC board into contact with the end of the cylindrical damper member,
The extension and contraction of the wire in the longitudinal direction due to the rotation of the movable portion and the resonance of the wire and the movable portion caused by the extension and contraction can be further suppressed.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, a concave groove is formed in at least one of an inner peripheral portion of the through hole and an outer peripheral portion of the cylindrical damper member. Since the gel-like damper member is injected into the inside, the gel-like damper member injected into the concave groove has an adhesive effect, a displacement between the cylindrical damper member and the fixing portion, and a gap between the cylindrical damper member and the fixing portion. I can prevent chatter vibration,
The reliability when moving the movable section in the track direction or the focus direction can be improved.

According to the sixth aspect of the present invention, one end of the wire on the fixed portion side is held with a damping characteristic by the gel damper member injected into the insertion hole of the fixed portion, and the wire is flexible. Since it is soldered to a hard type PC board held by a member, even if the movable part rotates when the movable part is moved in the track direction or the focus direction, the longitudinal direction of the wire accompanying the rotation To reduce the resonance of the wire and the movable part caused by the expansion and contraction, prevent the servo from deviating from the movable part due to the resonance, and improve the reliability when moving the movable part in the track direction or the focus direction. Can be increased. Furthermore, by using a hard type PC board, when attaching this PC board to a damper member,
Workability at the time of soldering the wire can be improved.

[Brief description of the drawings]

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

FIG. 2 is a perspective view thereof.

FIG. 3 is an exploded perspective view showing an objective lens driving device according to a second embodiment of the present invention.

FIG. 4 is a front view showing an FPC board according to the modification.

FIG. 5 is a perspective view showing an FPC board according to another modification.

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

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

FIG. 8 is an enlarged sectional view showing a part of an objective lens driving device according to a fifth embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a part of an objective lens driving device according to a sixth embodiment of the present invention.

FIG. 10 is a sectional view of the same.

FIG. 11 shows a conventional objective lens driving device.
(A) is a plan view and (b) is a side view.

FIG. 12 is a perspective view of the same.

13A and 13B show another conventional objective lens driving device, wherein FIG. 13A is a plan view and FIG. 13B is a side view.

FIG. 14 is a perspective view thereof.

[Explanation of symbols]

 2 Movable part 3 Wire 4 Objective lens 5, 6 Coil 12 Fixed part 14 Damper member, Gel damper member 15 Projection part 16 FPC board 19, 19a, 19b Flexure part 20 Damper sheet 21 Spring plate 22 Through hole 23 Through hole 24 Tube Damper member 26 Gel damper member 27, 28 Groove 29 Gel damper member 31 Damper member 33 PC board of hard type

Claims (6)

[Claims] A fixed part, a movable part holding a coil opposed to an objective lens and a magnet, wherein the fixed part and the movable part are connected by a plurality of wires, and In an objective lens driving device configured to drive the objective lens in the focus direction and the track direction integrally with the movable portion by energizing a coil, a damper member is provided in the fixed portion, and the wire is used by the damper member. Holding, the fixed portion is provided with a protruding portion protruding to the side opposite to the side on which the movable portion is arranged, an FPC board is attached to this protruding portion, and the tip of the wire is soldered to the FPC board. Characteristic objective lens driving device. 2. The FPC board according to claim 1, further comprising a flexible portion between the soldered portion of the wire and a portion attached to the protrusion, the flexible portion being easily bent along a longitudinal direction of the wire. 2. The objective lens driving device according to 1. 3. A damper sheet and a spring plate are joined to the FPC board in a surface contact state, and a through hole is formed in the spring plate so that the wire is inserted without contacting the wire. Item 3. The objective lens driving device according to Item 1 or 2. 4. A fixed part, and a movable part holding a coil facing the objective lens and the magnet, wherein the fixed part and the movable part are connected by a plurality of wires, and the movable part is connected to the movable part through the wires. An objective lens driving device configured to drive the objective lens integrally with the movable portion in the focus direction and the track direction by energizing a coil, wherein a through hole is formed in the fixed portion, and a cylindrical shape is formed in the through hole. Inserting a damper member, inserting the wire into the tubular damper member and injecting a gel-like damper member, soldering the tip end of the wire on the side where the tubular damper member was inserted to an FPC board, An objective lens driving device wherein the back surface of the FPC board is in contact with an end of the cylindrical damper member. 5. A groove is formed in at least one of an inner peripheral portion of the through hole and an outer peripheral portion of the cylindrical damper member, and a gel-like damper member is injected into the concave groove. The objective lens driving device according to claim 4. 6. A fixed part and a movable part holding a coil facing an objective lens and a magnet, wherein the fixed part and the movable part are connected by a plurality of wires, and the movable part is connected to the movable part via the wires. In an objective lens driving device configured to drive the objective lens in the focus direction and the track direction integrally with the movable portion by energizing a coil, the objective lens driving device moves to a side opposite to a side on which the movable portion is disposed in the fixed portion. A protruding damper member is attached, a hard type PC board is attached to the damper member, an insertion hole through which the wire is inserted is formed in the fixing portion, and a gel damper member is injected into the insertion hole, and the insertion hole is inserted. An objective lens driving device, wherein a distal end of the wire through which the wire is inserted is soldered to the PC board.