JP2006244591A - Objective lens driver, optical pickup device, and optical disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain high precision assembling of an objective lens holder and an elastic support, increase the joint area of the objective lens holder and the relay substrate to stabilize the connected attitude, and to increase the strength of the joint. <P>SOLUTION: The objective lens drive mechanism has an objective lens 12 to converge the light on the recording and reproducing surface of an optical disk, an objective lens holder 13 holding the objective lens, a drive coil 14 retained on the objective lens holder, elastic supports 21 to movably support the objective lens holder, a fixing section 2 to secure the elastic supports, and the relay substrate 15 retained by the objective lens holder to connect the objective lens holder side ends of the elastic supports and the ends of the drive coil. The surface 13a of the objective lens holder to support the relay substrate 15 is on the same plane as the surface 15a of the relay substrate to support the ends of the elastic supports. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an objective lens driving device used in an optical disc apparatus for recording and / or reproducing a disc by projecting laser light onto an optical disc, an optical pickup device including the objective lens driving device, and an optical pickup device. The present invention relates to an optical disc drive apparatus provided.

An optical disc drive apparatus that records and reproduces information by projecting laser light emitted from a laser light source onto a disk-shaped recording medium such as a CD or DVD projects a spot of the emitted laser light onto a recording surface of the recording medium. An optical head is provided.
The optical head includes, for example, a laser light source, a beam splitter, a quarter-wave plate, a lens, a mirror, a light receiving element, an objective lens, and the like. The objective lens is moved in a focusing direction, a tracking direction, and a tangential direction by an objective lens driving device. Drive towards.
The objective lens driving device includes a fixed portion fixed to the apparatus main body, and a movable portion that holds the objective lens and is supported by the fixed portion so as to be movable forward and backward. There are several types of configurations in which the fixed portion operably supports the movable portion. One of the methods that are mainly used at present is a method in which the movable portion is supported by an elastic support member. In particular, in the case of a moving coil system in which a drive coil is mounted on a movable part, by using a conductive material as an elastic support member, it is possible to achieve both the support of the movable part and the wiring to the drive coil, which is caused by the wiring. There is an advantage that unnecessary resonance can be prevented (Japanese Patent Laid-Open No. 2001-52357).
In addition, a structure with a relay substrate between the elastic support member and the drive coil for easy electrical connection between the elastic support member using the conductive material and the drive coil fixed to the movable part is easy to assemble. Therefore, it is widely used (for example, Japanese Patent Application No. 2004-230871).
An example of the configuration of the movable part of the objective lens driving device using this relay substrate will be described below. First, the objective lens holder has a relay board mounting surface for mounting the relay board, and the back surface of the relay board is fixed to the relay board mounting surface. On the surface of the relay substrate, there is an elastic support member mounting surface (land portion) for mounting the elastic support member. The elastic support member mounting surface (land portion) of the relay substrate and one end of the elastic support member on the objective lens side, Are electrically and mechanically connected by soldering. The drive coil fixed to the objective lens is electrically coupled to the drive coil mounting portion of the relay board. Accordingly, the objective lens holder and the elastic support member are mechanically coupled, and the drive coil and the elastic support member are electrically coupled.
However, in the configuration in which the relay substrate is interposed between the relay substrate mounting surface of the objective lens holder and the elastic support member as described above, when the thickness of the relay substrate varies, the elastic support member mounting portion ( Since the distance between the land portion) and the surface of the joint portion of the elastic support member varies, the assembling position accuracy is lowered, and the tilt and the like are adversely affected. In particular, when the distance between the relay board land portion and the surface of the joint portion of the elastic support member is large, a large amount of solder must be deposited on the land portion to fill this distance. Will be heavy and will adversely affect the sensitivity characteristics, and at the same time, the solder will be too close to the adjacent elastic support member mounting part of the relay board, and in the worst case it may be short-circuited, making assembly work easy It wasn't.
Japanese Patent Laid-Open No. 2001-052357 Japanese Patent Application No. 2004-230871

The present invention has been made in view of the above, and an object of the present invention is to perform highly accurate assembly of an objective lens holder and an elastic support member.
An object of the present invention is to increase the bonding area between the objective lens holder and the relay substrate, to stabilize the bonding posture and to enhance the bonding strength.
The object of claim 3 is achieved by assembling two elastic support members on the same axis that support the objective lens holder from both sides of the objective lens in the tangential direction by dividing the single elastic support member into two parts. The purpose is to simplify the assembly work and achieve high-precision assembly.
An object of the present invention is to provide an adhesive pool portion for bonding the objective lens holder and the relay substrate to improve the assembling workability between the objective lens holder and the relay substrate, and to improve the joint strength. It is in.
An object of the present invention is to provide an optical pickup device capable of obtaining a good signal.
An object of the present invention is to provide an optical disk drive device capable of reading and writing data satisfactorily.

In order to achieve the above object, the invention of claim 1 is directed to an objective lens for condensing light on a recording / reproducing surface of an optical disc, an objective lens holder for holding the objective lens, and a drive held by the objective lens holder. A coil, a plurality of elastic support members that operatively support the objective lens holder, a fixing portion that fixes the elastic support member, and the objective lens holder side of each elastic support member that is held by the objective lens holder A relay substrate for joining one end of each of the drive coils to each end point of the drive coil, a relay substrate mounting surface on which the objective lens holder supports the relay substrate, and the relay substrate includes the relay substrate The elastic member mounting surface for supporting the end portion of the elastic supporting member is on the same plane.
According to a second aspect of the present invention, in the first aspect, the plurality of elastic support members are arranged in parallel in the same plane substantially parallel to the optical disc surface, and the relay substrate has an optical axis of the objective lens. The relay substrate mounting surface of the objective lens holder is located symmetrically with respect to a plane parallel to the tangential direction, and extends outward in the tracking direction to a position beyond the elastic support member. To do.
According to a third aspect of the present invention, in the second aspect, a part of the relay substrate mounting surface of the objective lens holder is removed to form a through hole, and the opening width of the through hole includes an extension line of the elastic support member. It is characterized by being set to.
According to a fourth aspect of the present invention, in the second or third aspect, the position of the end of the objective lens holder that is farthest in the tracking direction with respect to the objective lens on the surface of the relay substrate, and the objective lens of the relay substrate In contrast, the position of the end portion farthest in the tracking direction is different.
An optical pickup device according to a fifth aspect of the invention includes a light source that emits a light beam, the objective lens driving device according to any one of claims 1 to 4, and the light beam in the objective lens driving device. An optical system that guides return light that has entered the lens, reflected by the recording / reproducing surface, and passed through the objective lens to a predetermined light receiving position; and a photodetector disposed at the light receiving position. To do.
An optical disk drive apparatus according to a sixth aspect of the present invention is the optical pickup apparatus according to the fifth aspect, a seek mechanism that moves the optical pickup apparatus in a radial direction of the optical disk, a spindle motor that rotates the optical disk, and the optical And a processing device that performs at least reproduction among recording, reproduction, and erasure of the information using an output signal of the pickup device.

According to the first aspect of the present invention, the relay substrate mounting surface on which the objective lens holder supports the relay substrate and the elastic member mounting surface on which the relay substrate supports the end of the elastic support member are on the same plane. Since it comprised, the highly accurate assembly | attachment with an objective-lens holder and an elastic support member can be performed.
According to the second aspect of the present invention, the relay substrate mounting surface of the objective lens holder that supports the relay substrate (the protruding piece 13B ′ of the T-shaped protruding member 13B) has a part (tip portion) on the outer side in the tracking direction. Since it extends to the position beyond the elastic support member fixing portion, the bonding area between the objective lens holder and the relay substrate can be expanded, and the bonding posture can be stabilized and the bonding strength can be enhanced.
In the invention of claim 3, since the opening width of the through hole from which a part of the surface of the objective lens holder on which the relay substrate is attached is removed so as to include the extension line of the elastic support member, the objective lens is objectively viewed from both sides in the tangential direction. Assembly of two elastic support members on the same axis that support the lens holder can be achieved by dividing the elastic support member into two, thereby simplifying the assembly operation and achieving high-precision assembly. it can.
In the invention of claim 4, the position of the end portion farthest in the tracking direction with respect to the objective lens on the relay substrate mounting surface of the objective lens holder and the end portion farthest in the tracking direction with respect to the objective lens of the relay substrate The position is different. That is, the objective lens holder and the relay substrate are joined in the space formed between both ends by making the positions of the outer end of the relay substrate different from the positions of the outer end of the protruding member of the objective lens holder. It is possible to improve the assembling workability between the objective lens holder and the relay substrate by providing the adhesive reservoir portion of the adhesive, and to improve the joint strength.
According to the fifth aspect of the present invention, since the objective lens driving device of the present invention is used, an optical pickup device capable of obtaining a good signal can be provided.
According to the invention of claim 6, since the optical pickup device using the objective lens driving device according to the present invention is used, it is possible to provide an optical disk drive device capable of reading and writing data satisfactorily. .

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
FIGS. 1A and 1B are an external perspective view and a plan view of a movable part of the objective lens driving device according to the first embodiment of the present invention. The objective lens driving device 1 is mounted on the optical disk drive device main body. The fixed part 2 and the movable part 11 are fixed.
The rectangular parallelepiped block-shaped movable portion 11 includes an objective lens 12, an objective lens holder 13 that holds the objective lens 12 on the upper surface, a plurality of drive coils 14 that are held by the objective lens holder 13, end points of each drive coil 14, and a description thereof. The relay substrate 15 is configured to electrically connect one end (front end) of the elastic support member 21 on the objective lens side. In addition, the movable portion 11 includes an elastic support member 21 that supports the objective lens holder 13 in three directions (tracking, focusing, and tangential directions), and a fixed portion 2 that fixes the elastic support member 21 in the tangential direction. One side is supported. Further, the driving magnet 3 is disposed in the fixed portion 2 so as to face the driving coil 14, and serves also as the back yoke 4a disposed on the back surface of the driving magnet 3 and the base portion 4b of the objective lens driving device. There is a yoke base 4, and the yoke base 4 is fixed to the fixed portion 2. The relay substrate 15 is fixed to both sides of the objective lens holder 13 in the tracking direction, and is fixed to the relay substrate mounting surface 13 a of the objective lens holder 13.
As shown in FIG. 1A, one end (front end) of the plurality of elastic support members 21 made of a conductive material is fixed to the relay substrate 15 fixed to the movable portion 11, and the other end (rear end). Is fixed to the fixed portion 2 and elastically supports the movable portion 11.
The end point of each drive coil 14 and the relay substrate 15 and the relay substrate 15 and each elastic support member 21 are electrically connected to each other, and the drive coil 14 fixed to the movable portion 11 is externally connected. A current can be supplied. Then, the current flowing through the drive coil 14 and the magnetic flux generated by the drive magnet 3 disposed opposite to the drive coil 14 are combined to generate a Lorentz force in the drive coil 14, thereby making the movable part 11 an arbitrary It becomes possible to drive in the direction.

Here, the objective lens holder 13 and the elastic support member 21 are assembled via the plate-shaped relay substrate 15, but the relay substrate is attached to the junction surface between the objective lens holder 13 and each relay substrate 15. By setting the surface 13a and the elastic support member mounting surface (land portion) 15a of the relay substrate 15 that supports the front end portion of each elastic support member 21 to coincide with each other, the relay substrate mounting surface 13a of the objective lens holder The elastic support member mounting surface (land portion) 15a of the relay board is located on the same plane, and as long as the relay board support member mounting surface 15a is a flat surface, there is a difference in the thickness of the relay board. Also, the structure does not affect the assembly accuracy (FIG. 1B). For this reason, the objective lens holder 13 and the elastic support member 21 can be assembled with high accuracy.
That is, according to the present embodiment, not only can the objective lens holder 13 and the elastic support member 21 be assembled with high accuracy, but also the bonding area between the objective lens holder 13 and the relay substrate 15 is increased. In addition, the bonding posture can be stabilized and the bonding strength can be enhanced.

Next, a second embodiment of the present invention will be described based on FIGS. FIGS. 2A and 2B are an external perspective view and a front view (side view in the tangential direction) of the objective lens driving device according to the second embodiment, and FIGS. 3A, 3B, and 3C. FIG. 4 is a perspective view, a movable part plan view, and a movable part front view (side view in the tangential direction) showing a structural example of a partially deformed movable part, and FIGS. 4A and 4B are partially deformed movable parts. FIG. 6 is a front view of a part (tangential direction side view) and a movable part front view (tangential direction side view) according to still another modification.
The movable part 11 of the objective lens driving device 1 according to the embodiment of FIG. 2 includes an objective lens 12, an objective lens holder 13 that holds the objective lens 12, and drive coils that are held by the front and rear surfaces of the objective lens holder 13, respectively. 14 and a relay substrate 15 that electrically connects an end point of each drive coil 14 and one end of the elastic support member 21 on the objective lens side.
The movable unit 11 includes an elastic support member 21 that operably supports the objective lens holder 13 in each direction (tracking, focusing, and tangential directions), and a fixing unit 2 that fixes the other end of the elastic support member 21. Are supported from both sides (front and rear) of the tangential direction.
Each fixed portion 2 is provided with a driving magnet 3 opposite to each driving coil 14 and serves as a back yoke 4a on the back of each driving magnet 3 and a base portion 4b of the objective lens driving device. A yoke base 4 is provided, and the yoke base 4 a is fixed to the fixing portion 2.
The relay substrate 15 exists on both side surfaces of the objective lens holder 13 in the tracking direction, and is fixed to the relay substrate mounting surface 13b of the objective lens holder 13, respectively. In this example, a relay board mounting surface 13b is provided on the lower surface of a plate-like projecting member 13B that projects horizontally from both side surfaces of the objective lens holder 13 in the tracking direction. Both the relay board mounting surfaces 13b are flat surfaces and are configured to have the same height level.
The plurality of elastic support members 21 (eight in this example) made of a conductive material are stretched and supported in parallel so that all the heights are at the same level and are substantially in the same plane. As described above, one end is fixed to the relay substrate 15 fixed to the movable portion 11, and the other end is fixed to each fixed portion 2 to elastically support the movable portion 11. In this example, four elastic support members 21 located on both the left and right sides with the movable portion 11 interposed therebetween are arranged symmetrically.
Between the end point of each drive coil 14 and the relay substrate 15 and between the relay substrate 15 and the elastic support member 21 are electrically connected to each drive coil 14 fixed to the movable portion 11. Current can be supplied from the outside. Then, the current flowing through the drive coil 14 and the magnetic flux generated by the drive magnet 3 disposed opposite to the drive coil 14 are combined to generate a Lorentz force in the drive coil, so that the movable part 11 can be arbitrarily set. It becomes possible to drive in this direction.

Here, the objective lens holder 13 and the elastic support member 21 are assembled via the flat relay substrate 15, but the junction between each elastic support member 21 and the relay substrate 15 is connected to each relay substrate. By setting the same surface 15b, the relay substrate mounting surface 13b of the objective lens holder and the elastic support member mounting surface (land portion) 15b of the relay substrate are located on the same plane, and the thickness of the relay substrate is increased in thickness. Even if there is a difference, the assembly accuracy is not affected (FIG. 2B). For this reason, the objective lens holder 13 and the elastic support member 21 can be assembled with high accuracy.
That is, according to the present embodiment, not only can the objective lens holder 13 and the elastic support member 21 be assembled with high accuracy, but also the bonding area between the objective lens holder 13 and the relay substrate 15 is increased. In addition, the bonding posture can be stabilized and the bonding strength can be enhanced.
3A, 3B, and 3C, a part of the relay substrate mounting surface 13b of the objective lens holder extends to the outer position beyond the elastic support member 21 in the tracking direction. By forming each protruding member 13B in a T shape so as to exist, the bonding area between the relay substrate mounting surface 13b of the objective lens holder and the upper surface 15b of the relay substrate 15 is enlarged, the bonding posture is stabilized, and the bonding is performed. Strength is improved and reliable assembly is possible.

4 (a) and 4 (b) is a modification of the embodiment of FIG. 3, and the end portion of the relay board mounting surface 13b of the objective lens holder 13 and the relay board 15 are provided. By providing a step without aligning the ends, it is possible to provide an adhesive pool portion of the adhesive 30 for joining the objective lens holder and the relay substrate, and assembling workability between the objective lens holder and the relay substrate. As well as improving the bonding strength, it is possible to assemble with high reliability. That is, the projecting member 13B is formed in a T shape, and the position of the tip of the projecting piece 13B ′ having a narrow center and the position of the tip of the relay board 15 are made different from each other. The space is filled with the adhesive 30.
That is, in the present embodiment, the position of the end portion farthest in the tracking direction with respect to the objective lens of the relay substrate mounting surface 13b of the objective lens holder and the end portion farthest in the tracking direction with respect to the objective lens of the relay substrate The configuration is different from the position of.
In the configuration example of FIG. 4A, the position of the outer end portion of the relay board 15 is made longer than the position of the outer end portion of the protruding piece 13B ′ having a narrow width in the tracking direction of the T-shaped protruding member 13B. As a result, an adhesive reservoir portion made of the adhesive 30 is formed in a space between the end surface of the outer end portion of the protruding piece 13B ′ and the upper end surface of the relay substrate 15.
In the example of FIG. 4B, contrary to the above, the position of the outer end portion of the protruding piece 13B ′ of the T-shaped protruding member 13B is made longer than the position of the outer end portion of the relay board 15. An adhesive reservoir portion made of the adhesive 30 is formed in a space between the lower surface of the outer end portion of the protruding piece 13B ′ and the end surface of the end portion of the relay substrate 15.

Next, a third embodiment of the present invention will be described with reference to FIGS. 5 to 7 (the same parts as those of the second embodiment are denoted by the same reference numerals). 5A and 5B are an external perspective view and an enlarged view of the main part of the movable part according to the third embodiment, and FIGS. 6A and 6B are views of the movable part of FIG. It is a top view and a front view (tangential direction side view). Further, FIGS. 7A and 7B are front views (side views in the tangential direction) showing modified examples of the third embodiment, respectively. Note that the overall configuration of the objective lens driving device 1 is also referred to FIG.
In the second embodiment, when assembling the eight elastic support members that support the objective lens holder from both sides in the tangential direction of the objective lens, the individual ones must be individually disposed and assembled. This point is inconvenient.
Therefore, in the present embodiment, a part of the lower surface of the objective lens holder 13 having the relay substrate mounting surface 13b on the lower surface is cut out to form a through hole 13B ″, and the opening width of the through hole 13B ″ is set to the relay substrate 15. The opening width is set so as to include the tangential extension line of the fixed portion of each elastic support member end.
In this embodiment, when the eight elastic support members 21 are stretched between the fixed portions 2 and the relay substrate 15, work using four long elastic support members is possible. Can be reduced. That is, through the through holes 13B ", the fixing portions 2 positioned on both sides of the tangential direction in FIG. 2A are passed and fixed so that both ends of the four long elastic support members are hooked. After joining the appropriate portions of the middle portion of the elastic support member to the relay substrate 15 in two places, the central portion of the elastic support member 21 is cut over the required length (the portion located substantially in the through hole 13B ″). Remove. As a result, the two elastic support members 21 finally assembled on the same axis can be assembled at a time using one long elastic support member, so that the assembling work can be simplified. At the same time, since a long span can be taken when the elastic support member is assembled, highly accurate assembly is possible.

Further, as shown in FIGS. 7A and 7B, the objective lens holder and the relay substrate are formed by providing a step without aligning the outer end portion of the relay substrate mounting surface 13b of the objective lens holder and the outer end portion of the relay substrate. In addition to improving the assembling workability between the objective lens holder and the relay substrate, the bonding strength of the objective lens holder and the relay substrate is improved, and the assembling with high reliability is made possible.
That is, in the present embodiment, the position of the end portion farthest in the tracking direction with respect to the objective lens of the relay substrate mounting surface 13b of the objective lens holder and the end portion farthest in the tracking direction with respect to the objective lens of the relay substrate The configuration is different from the position of.
In the configuration example of FIG. 7A, the position of the outer end of the relay board 15 is made longer than the position of the outer end of the protruding piece 13B ′ of the T-shaped protruding member 13B. An adhesive reservoir portion made of the adhesive 30 is formed in the space between the end surface of the outer end portion of the relay substrate 15 and the upper surface of the end portion of the relay substrate 15.
In the example of FIG. 7B, contrary to the above, the position of the outer end portion of the protruding piece 13B ′ of the T-shaped protruding member 13B is made longer than the position of the outer end portion of the relay board 15. An adhesive reservoir portion made of the adhesive 30 is formed in a space between the lower surface of the outer end portion of the protruding piece 13B ′ and the end surface of the end portion of the relay substrate 15.

Next, based on FIG. 8, a configuration example of an optical pickup device provided in an optical disk drive device including the objective lens driving device of the present invention will be described.
Laser light emitted from a light source 41 mounted on the optical pickup device 40 sequentially passes through a coupling lens 42 and a beam splitter 43 and is bent by a rising mirror 44. The light bent by the rising mirror 44 is incident on an objective lens of an objective lens driving device (not shown) mounted on the optical pickup, and forms a spot on a recording / reproducing surface of an optical disc (not shown). The return light (reflected light from the spot) reflected by the recording / reproducing surface and passing through the objective lens is converted into a direction different from the direction at the time of incidence by the beam splitter 43, and the detection lens 45, the cylindrical lens 46, etc. After passing through the optical system, the light enters a light receiver 47 as a photodetector. Information on the optical disk can be obtained by driving the focusing coil and tracking coil of the objective lens driving device based on the signal obtained by the light receiver 47 to follow the objective lens with respect to the optical disk. Here, the objective lens driving device 1 mounted on the optical pickup has the configuration described in the first to third embodiments. Thereby, it is possible to provide an optical pickup device capable of obtaining a good signal.

Next, a configuration example of an optical disk drive device provided with the optical pickup device of the present invention will be described based on FIG.
A pickup module 51 is installed in the optical disk drive device 50. A spindle motor 53 that rotates the optical disk 52 is fixed to the pickup module 51. An optical pickup device 40 is mounted on a seek rail (seek mechanism) 54 attached to the pickup module 51 so as to freely advance and retract. The optical pickup device 40 can move on the seek rail 54 in the radial direction of the optical disk 52. Here, the optical pickup device 40 mounted on the optical disk drive device 50 relates to the embodiment of FIG. Furthermore, a processing device for performing at least reproduction of information recording, reproduction and erasure using an output signal of the optical pickup device is provided. As a result, it is possible to provide an optical disk drive device that can read and write data satisfactorily.
That is, the optical disc drive device 50 of the present invention includes an optical pickup device 40, a seek rail 54 as a seek mechanism for moving the optical pickup device 40 in the radial direction of the optical disc 52, a spindle motor 53 for rotating the optical disc, And a processing device that performs at least reproduction of information recording, reproduction, and erasure using an output signal of the pickup device.
In the present invention, the optical disk is a concept including CD, DVD, and other disk-shaped recording media.

(A) And (b) is an external appearance perspective view of the objective-lens drive device which concerns on the 1st Embodiment of this invention, and the top view of a movable part. (A) And (b) is an external appearance perspective view of an objective lens drive device concerning a 2nd embodiment, and a front view (tangential direction side view). (A) (b) And (c) is the perspective view which shows the structural example of the movable part which deform | transformed partially, a movable part top view, and a movable part front view (tangential direction side view). (A) And (b) is a movable part front view (tangential direction side view) partially deformed, and a movable part front view (tangential direction side view) according to still another modification. (A) And (b) is the external appearance perspective view of the movable part which concerns on 3rd Embodiment, and the principal part enlarged view. (A) And (b) is a top view of a movable part of Drawing 5, and a front view (tangential direction side view). (A) And (b) is a front view (tangential direction side view) which shows the modification structural example of 3rd Embodiment, respectively. The figure which shows the structural example of the optical pick-up with which the optical disk drive device provided with the objective lens drive device of this invention is equipped. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a configuration example of an optical disk drive device including an optical pickup device of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Objective lens drive device, 2 Fixed part, 4 Yoke base, 11 Movable part, 12 Objective lens, 13 Objective lens holder, 13a Relay board mounting surface, 13B Protruding member, 13B 'Protruding member, 13B "Through hole, 14 Driving coil 15 Relay substrate, 15a Relay substrate support member mounting surface, 21 Elastic support member, 30 Adhesive, 40 Optical pickup device, 50 Optical disk drive device.

Claims (6)

An objective lens that collects light on the recording / reproducing surface of the optical disc, an objective lens holder that holds the objective lens, a drive coil that is held by the objective lens holder, and a plurality that operably supports the objective lens holder An elastic support member, a fixing portion for fixing the elastic support member, and one end of each elastic support member on the objective lens holder side and each end point of the drive coil. An objective lens driving device comprising:
A relay board mounting surface on which the objective lens holder supports the relay board and an elastic member mounting surface on which the relay board supports an end of the elastic support member are arranged on the same plane. Objective lens drive.   The plurality of elastic support members are arranged in parallel in the same plane substantially parallel to the optical disk surface, and the relay substrate is in a plane parallel to the tangential direction including the optical axis of the objective lens. 2. The objective lens driving device according to claim 1, wherein the relay lens mounting surface of the objective lens holder extends to a position beyond the elastic support member toward an outer side in a tracking direction.   3. The objective lens holder according to claim 2, wherein a part of the relay substrate mounting surface of the objective lens holder is removed to form a through hole, and an opening width of the through hole is set so as to include an extension line of the elastic support member. Objective lens drive device.   The position of the end of the objective lens holder that is farthest in the tracking direction with respect to the objective lens on the surface of the relay substrate, and the position of the end of the relay substrate that is farthest in the tracking direction with respect to the objective lens The objective lens driving device according to claim 2, wherein the objective lens driving devices are different from each other.   A light source that emits a light beam, the objective lens driving device according to claim 1, and the light beam is incident on the objective lens in the objective lens driving device and is reflected by the recording / reproducing surface. An optical pickup apparatus comprising: an optical system that guides return light that has passed through the objective lens to a predetermined light receiving position; and a photodetector disposed at the light receiving position. 6. The information pickup using the optical pickup device according to claim 5, a seek mechanism for moving the optical pickup device in a radial direction of the optical disc, a spindle motor for rotating the optical disc, and an output signal of the optical pickup device. An optical disk drive device comprising: a processing device that performs at least reproduction among reproduction and erasure.

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