JP2007213631A - Objective lens driving device, optical pickup device and optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin type objective lens driving device for controlling the inclination to an optical disk of an objective lens, an optical pickup device and an optical disk device. <P>SOLUTION: The objective lens driving device 11 comprises a lens holder 2, a first focus coil 6a, a second focus coil 6b, a tracking coil 7, and a support member 3 having a set of first conductive members 3d for making a current flow to the first focus coil 6a, a set of second conductive members 3e for making a current flow to the second focus coil 6b and a set of third conductive members 3f for making a current flow to the tracking coil 7. The support member 3 is formed of the two-layer structure of an outer layer and an inner layer, and any one conductive member among a set of the first conductive members 3d, a set of the second conductive members 3e and a set of the third conductive members 3f constitutes the outer layer or the inner layer of the support member 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an objective lens driving device, an optical pickup device, and an optical disk device that are preferably mounted on an electronic device such as a personal computer.

  Conventionally, optical disc apparatuses have evolved from CD (Compact Disc) to DVD (Digital Versatile Disc), and BD (Blu-ray Disc) and HD DVD (High Definition DVD) have been developed as next-generation DVDs. On the other hand, the optical disc apparatus has evolved by adding a function of recording information to the optical disc in addition to a function of simply reproducing information recorded on the optical disc. An optical pickup device that is mounted on an optical disc device and records / reproduces information on / from the optical disc has also evolved in accordance with the above evolution.

  FIG. 16 is a diagram showing an objective lens driving device of a conventional optical pickup device capable of recording / reproducing with respect to a CD and a DVD. The objective lens 101 is a lens that condenses laser light emitted from a laser light source (not shown) so as to be focused on a recording surface of an optical disc (not shown). The objective lens 101 is fixed to the lens holder 102. The lens holder 102 also fixes the first focus coil 106a, the second focus coil 106b, and the tracking coil 107. The lens holder 102 fixes one end of the support member 103, and the other end of the support member 103 is fixed to the fixing member 104. Six support members 103 are arranged in three rows in one row at both ends of the lens holder 102. The gap between the uppermost and lowermost support members 103 to which the lens holder 102 is fixed is about 1.32 mm, and the gap between the middle and uppermost support members 103 and the gap between the middle and lowermost support members 103 are 0 respectively. About 62 mm. The fixing member 104 is fixed to a yoke 105, and the yoke 105 is fixed to a carriage (not shown) of the optical pickup device. Further, the yoke 105 fixes the magnet 108. The lens holder 102 on which the objective lens 101 is mounted is elastically supported by the support member 103 and can move in the focus direction and the tracking direction of the optical disc.

  The tracking coils 107 are electrically connected to each other and are connected to the ends of the pair of third conductive members 103c on the lens holder 102 side. In addition, the two focus coils 106 are independently the first focus coil 106a and the second focus coil 106b, respectively, and the ends of the pair of first conductive members 103a and the pair of second conductive members 103b on the lens holder 102 side. Connected. The end of the support member 103 on the fixed member 104 side is connected to a conductive wire (not shown) that allows current to flow through the focus coil 106 and the tracking coil 107. As described above, the six support members 103 also serve as conductive lines for passing current to the first focus coil 106a, the second focus coil 106b, and the tracking coil 107. The first focus coil 106a, the second focus coil 106b, the tracking coil 107, and the magnet 108 constitute a magnetic circuit. When the current flows through the first focus coil 106a, the second focus coil 106b, and the tracking coil 107, the lens holder 102 on which the objective lens 101 is mounted can be moved in the focus direction and the tracking direction of the optical disk by electromagnetic force. Has been placed.

  In the case of DVD recording, the tilt of the objective lens 101 in the tracking direction of the optical disk has a great influence on the characteristics. Therefore, the optical pickup device used for DVD recording can control the tilt of the objective lens 101. In order to control the tilt of the objective lens 101, the currents flowing through the first focus coil 106a and the second focus coil 106b are controlled independently, and the electromagnetic force generated by each focus coil 106 is controlled.

(Patent Document 1) further changes the magnetic circuit so that the objective lens driving device can be made thinner.
JP 2003-203373 A

  Optical disc devices have evolved in the direction of reducing their thickness, and the optical pickup device mounted thereon is also required to be thin. For this purpose, it is necessary to reduce the thickness of the objective lens driving device. However, if the objective lens driving device is made thinner, it is necessary to further narrow the gap between the uppermost and lowermost support members. However, since it is necessary to further reduce the distance between the support members, when the support member, the lens holder, and the fixing member are to be molded integrally, the thickness of the spacer inserted between the support members cannot be secured. The problem has occurred. Further, when trying to fix the support member to the terminal board provided on the lens holder with solder, there has been a problem that a space necessary for arranging the solder lands vertically on the terminal board cannot be secured. That is, it has become difficult to arrange support members having three stages at both ends of the lens holder in the thickness direction so that the gap between the uppermost and lowermost support members is further narrowed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a thin objective lens driving device, an optical pickup device, and an optical disc device that can control the tilt of an objective lens with respect to an optical disc.

  In order to achieve the above object, the present invention provides a lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and the lens holder. A second focus coil that moves the other end of the optical disc in the focus direction of the optical disc, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a pair of first conductive members that pass current through the first focus coil, A support member including a pair of second conductive members that cause current to flow through the second focus coil and a set of third conductive members that cause current to flow through the tracking coil. The support member includes an outer layer and an inner layer. The set of first conductive members, the set of second conductive members, and the set of third conductive portions. Any one conductive member of the objective lens driving device, characterized in that to constitute a either the outer or the inner layer of the support member.

  A lens holder that holds an objective lens that emits laser light to the optical disc; a first focus coil that moves both ends of the lens holder in the focus direction of the optical disc; and one end of the lens holder that moves in the focus direction of the optical disc. A second focus coil that moves the other end in the focus direction of the optical disk facing in the opposite direction, a tracking coil that moves the lens holder in the tracking direction of the optical disk, and a set of first conductive members that allow current to flow through the first focus coil And a support member comprising a set of second conductive members that cause current to flow through the second focus coil and a set of third conductive members that cause current to flow through the tracking coil. Formed in a two-layer structure with an inner layer, the set of first conductive members and the set of second conductive members Any one of the conductive members of said set of third conductive member may be an objective lens driving device, characterized in that to constitute a either the outer or the inner layer of the support member.

  Since the support members arranged at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, if the two layers are arranged in one row, the first focus coil and a pair of first conductive members, The second focus coil and the set of second conductive members can be connected to the tracking coil and the set of third conductive members, respectively. Further, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost and lowermost support members can be almost halved as compared with the case where the support members are arranged in three stages.

  In the objective lens driving device of the present invention, since the support members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, the conductive members combining the outer layer and the inner layer are arranged in two rows and one row. If arranged, the total is 8. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner.

  According to a first aspect of the present invention, a lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and the other end of the lens holder A second focus coil for moving in the focus direction of the optical disc, a tracking coil for moving the lens holder in the tracking direction of the optical disc, a pair of first conductive members for passing a current through the first focus coil, and a current through the second focus coil A support member having a pair of second conductive members that flow and a pair of third conductive members that cause a current to flow through the tracking coil. The support member is formed of a two-layer structure of an outer layer and an inner layer. Any one conductive member of the set of the first conductive member, the set of the second conductive member, and the set of the third conductive member is an outer layer or an inner layer of the support member. Is an objective lens driving device configured either.

  Since the supporting members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, a total of eight members are provided if the conductive members combining the outer layer and the inner layer are disposed in two rows and one row. Become. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner.

  According to a second aspect of the present invention, a lens holder that holds an objective lens that emits laser light to an optical disk, a first focus coil that moves both ends of the lens holder in the focus direction of the optical disk, and one end of the lens holder that is in the focus direction of the optical disk A second focus coil that moves the other end in the opposite direction of the focus direction of the optical disk, a tracking coil that moves the lens holder in the tracking direction of the optical disk, and a pair of first conductive currents that flow through the first focus coil And a support member comprising a pair of second conductive members for passing current through the member and the second focus coil, and a set of third conductive members for passing current through the tracking coil. The support member comprises an outer layer and an inner layer. Formed of a two-layer structure, and a set of first conductive members, a set of second conductive members, and a set of third conductive members. The single conductive member is an objective lens driving apparatus configured either the outer or inner layer of the support member.

  Since the supporting members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, a total of eight members are provided if the conductive members combining the outer layer and the inner layer are disposed in two rows and one row. Become. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner.

  A third aspect of the present invention is the objective lens driving device according to the first or second aspect of the present invention, wherein the support members are arranged in two rows and one row at both ends of the lens holder.

  Since the support members that are arranged at both ends of the lens holder and are formed in a double structure of the outer layer and the inner layer are arranged in two rows and one row, the total number of the conductive members including the outer layer and the inner layer is eight. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner.

  A fourth aspect of the present invention is the objective lens driving device according to the first or second aspect of the present invention, wherein an insulating member is disposed between the outer layer and the inner layer.

  Since the insulation between the outer layer and the inner layer is maintained, the reliability can be improved.

  A fifth aspect of the present invention is the objective lens driving device according to the fourth aspect of the present invention, wherein a coated conducting wire is constituted by an inner layer and an insulating member.

  Since the support member can be manufactured by inserting the coated conductor in the outer layer, it is easy to manufacture.

  A sixth aspect of the invention is the objective lens driving device according to the fifth aspect of the invention, wherein the inner layer forms at least one of a first focus coil, a second focus coil, or a tracking coil.

  Since the covered conductive wire on which the first focus coil, the second focus coil, or the tracking coil is formed is used as an inner layer as it is, a space necessary for connection between these coils and the inner layer becomes unnecessary. Therefore, it is easy to make the objective lens driving device small.

  A seventh aspect of the invention is the objective lens driving device according to the fourth aspect of the invention, wherein the support member is a coaxial cable.

  Since the coaxial cable is inexpensive, the objective lens driving device can be manufactured at low cost.

  The invention according to claim 8 is the objective lens drive according to claim 1 or 2, wherein the support member includes a fourth conductive member that is not connected to any of the first focus coil, the second focus coil, and the tracking coil. Device.

  By providing the fourth conductive member, the support member can be arranged symmetrically in the vertical and horizontal directions, and the lens holder can be elastically supported in a well-balanced manner.

  A ninth aspect of the invention is the objective lens driving device according to the first aspect of the invention, wherein the number of outer layers and inner layers constituting the first conductive member is the same as the number of outer layers and inner layers constituting the second conductive member. .

  Even if the electric resistances of the outer layer and the inner layer are different, the electric resistances of the first conductive member and the second conductive member can be made substantially equal, so that the drive currents flowing through the first focus coil and the second focus coil can be made substantially the same. . For this reason, the sensitivity of the first focus coil and the second focus coil are substantially the same, so that the tilt control of the objective lens with respect to the optical disk can be easily performed.

  According to a tenth aspect of the present invention, in the first or second aspect of the present invention, the flat portion for fixing the fixing member, the arm portions extending from both ends of the flat portion in substantially the same direction, and the both arm portions A first standing yoke portion bent at a substantially right angle between the flat portion and the two arm portions bent inward at a substantially right angle on the same side as the first standing yoke portion with a fold in an oblique direction. An objective lens driving device including a yoke having a second standing yoke portion bent so that a distal end portion of an arm portion faces the first standing yoke portion.

  Since the required space is small, the optical pickup device can be easily downsized.

  An eleventh aspect of the present invention is the objective lens driving device according to the third aspect of the present invention, wherein the support member is arranged in two stages on the lens holder and the gap is 1 mm or less.

  The thickness of the objective lens driving device can be reduced.

  According to a twelfth aspect of the present invention, there is provided a lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and the other end of the lens holder that focuses the optical disc. A second focus coil that moves in the direction, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a pair of first conductive members that pass current through the first focus coil, and a pair that passes current through the second focus coil A support member having a second conductive member and a pair of third conductive members for passing a current through the tracking coil, and the support member is formed of a two-layer structure of an outer layer and an inner layer, Any one conductive member of one conductive member, one set of second conductive member, and one set of third conductive member is either the outer layer or the inner layer of the support member. Or an optical pickup apparatus having the objective lens driving device configured to.

  Since the supporting members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, a total of eight members are provided if the conductive members combining the outer layer and the inner layer are disposed in two rows and one row. Become. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner. Therefore, the optical pickup device provided with this objective lens driving device can also be reduced in thickness.

  According to a thirteenth aspect of the present invention, there is provided a lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves both ends of the lens holder in the focus direction of the optical disc, and one end of the lens holder that is in the focus direction of the optical disc. A second focus coil that moves the other end in the opposite direction of the focus direction of the optical disk, a tracking coil that moves the lens holder in the tracking direction of the optical disk, and a pair of first conductive currents that flow through the first focus coil And a support member comprising a pair of second conductive members for passing current through the member and the second focus coil, and a set of third conductive members for passing current through the tracking coil. The support member comprises an outer layer and an inner layer. Of a pair of first conductive members, a pair of second conductive members, and a set of third conductive members. One conductive member at will is an optical pickup apparatus having the objective lens driving device configured to either outer or inner layer of the support member.

  Since the supporting members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, a total of eight members are provided if the conductive members combining the outer layer and the inner layer are disposed in two rows and one row. Become. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner. Therefore, the optical pickup device provided with this objective lens driving device can also be reduced in thickness.

  According to a fourteenth aspect of the present invention, there is provided a lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and the other end of the lens holder that focuses the optical disc. A second focus coil that moves in the direction, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a pair of first conductive members that pass current through the first focus coil, and a pair that passes current through the second focus coil A support member having a second conductive member and a pair of third conductive members for passing a current through the tracking coil, and the support member is formed of a two-layer structure of an outer layer and an inner layer, Any one conductive member of one conductive member, one set of second conductive member, and one set of third conductive member is either the outer layer or the inner layer of the support member. Or an optical disk apparatus provided with the objective lens driving device configured to.

  Since the supporting members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, a total of eight members are provided if the conductive members combining the outer layer and the inner layer are disposed in two rows and one row. Become. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner. Therefore, the optical disk device provided with this objective lens driving device can also be made thinner.

  According to a fifteenth aspect of the present invention, a lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves both ends of the lens holder in the focus direction of the optical disc, and one end of the lens holder that is in the focus direction of the optical disc A second focus coil that moves the other end in the opposite direction of the focus direction of the optical disk, a tracking coil that moves the lens holder in the tracking direction of the optical disk, and a pair of first conductive currents that flow through the first focus coil And a support member comprising a pair of second conductive members for passing current through the member and the second focus coil, and a set of third conductive members for passing current through the tracking coil. The support member comprises an outer layer and an inner layer. Of a pair of first conductive members, a pair of second conductive members, and a set of third conductive members. One conductive member at will is a disc apparatus having the objective lens driving device configured to either outer or inner layer of the support member.

  Since the supporting members disposed at both ends of the lens holder are formed in a double structure of the outer layer and the inner layer, a total of eight members are provided if the conductive members combining the outer layer and the inner layer are disposed in two rows and one row. Become. Therefore, the first focus coil and the set of first conductive members, the second focus coil and the set of second conductive members, and the tracking coil and the set of third conductive members can be connected. As described above, since current can flow independently to the first focus coil, the second focus coil, and the tracking coil, tilt control of the objective lens with respect to the optical disk can be performed. In addition, even in the gap between the support members equivalent to the conventional one, the gap between the uppermost support member and the lowermost support member can be almost halved as compared with the case where the support members are arranged in three stages. Can be made thinner. Therefore, the optical disk device provided with this objective lens driving device can also be made thinner.

(Embodiment 1)
The first embodiment will be described with reference to the drawings. FIG. 1 is a configuration diagram of the objective lens driving device according to the first embodiment. In the first embodiment, in the objective lens driving device 11, the objective lens 1, the focus coil 6, and the tracking coil 7 are fixed at predetermined positions of the lens holder 2. A fixing member 4 is fixed to a yoke 5 to which a magnet 8 is fixed, and this is called an apparatus main body. One end of the support member 3 is fixed to the terminal plates 2 d at both ends of the lens holder 2, and the other end is fixed to the fixing portion 4. The lens holder 2 is elastically supported by the support member 3. The support member 3 is arranged in two stages on both ends of the lens holder 2. The arrangement of the support member 3 is referred to as the upper stage on the side closer to the optical disc and the lower stage on the far side.

  In the first embodiment, the gap between the upper and lower support members 3 is 0.6 mm. If it is 1 mm or less, the thickness of the objective lens driving device 11 can be sufficiently reduced as compared with the conventional configuration. If it is 0.8 mm, the space for the solder land 2f for fixing the supporting member 3 on the terminal board 2d can be secured with a margin. Moreover, if it is 0.6 mm, it is substantially equivalent to the gap | interval between each support member of a conventional structure, and the space for the solder land 2f can be ensured to the last. The thickness of the objective lens driving device 11 can be made as thin as possible. In the case of 0.6 mm, the distance between the uppermost support member 3 and the lowermost support member 3 can be almost halved.

  2A is a configuration diagram of the lens holder according to the first embodiment, FIG. 2B is an arrangement and wiring diagram of solder lands on the left terminal board of FIG. 2A, and FIG. FIG. 3 is an arrangement and wiring diagram of solder lands on the right terminal board of FIG. The lens holder 2 is provided with a first through hole 2a at the center portion to which the objective lens 1 is fixed. Moreover, the 2nd through-hole 2b to which the focus coil 6 is fixed is provided in the both sides of the 1st through-hole 2a. The second through holes 2b are arranged substantially in the tracking direction of the optical disc. Moreover, the notch part 2c was provided in the outer edge part so that the 2nd through-hole 2b might be pinched | interposed. The tracking coil 7 is fixed to the notch 2c. Further, a terminal plate 2d for holding the support member 3 is provided on the side surfaces of both end portions of the lens holder 2 in the substantially tracking direction of the optical disk. The terminal board 2d is attached to the lens holder 2 body with an adhesive. As shown in FIGS. 2B and 2C, the terminal board 2d is a printed circuit board and includes solder lands 2e, 2f, and 2g. The solder land 2e is preliminarily wired in the solder land 2f or the solder land 2g and the terminal board 2d and is electrically connected. The arrangement and wiring of the solder lands 2e, 2f, and 2g are set by design. The lens holder 2 is formed of a liquid crystal polymer containing a glass filler. Since the support members 3 are arranged in two stages, ie, an upper stage and a lower stage, on the solder lands 2f of the terminal plate 2d on the side surfaces of both ends of the lens holder 2, the solder lands 2f are arranged in two stages.

  FIG. 3 is a configuration diagram of the support member according to the first embodiment. The support member 3 is formed in a two-layer structure of an outer layer and an inner layer, and the outer layer is constituted by an outer layer conductive member 3a and the inner layer is constituted by an inner layer conductive member 3b. That is, a hollow conductive outer layer conductive member 3a and an inner layer conductive member 3b arranged insulated from the outer layer conductive member 3a in a hollow portion of the outer layer conductive member 3a, the outer layer conductive member 3a and the inner layer conductive member 3b An insulating member 3c is disposed between them. In the first embodiment, the support member 3 has a configuration in which a covered conductive wire including an inner layer conductive member 3b and an insulating member 3c is disposed in a hollow portion of a tubular outer layer conductive member 3a. Since the support member 3 can be manufactured by inserting the covered conductive wire into the outer conductive member 3a, it is easy to manufacture. The outer layer conductive member 3a has a substantially annular cross section, and the inner layer conductive member 3b has a substantially circular cross section. The outer layer conductive member 3a is fixed to the solder lands 2f of the terminal plate 2d and plays the most part of the role of elastically supporting the lens holder 2. Therefore, the outer layer conductive member 3a is made of an elastic conductive material such as a copper alloy (for example, copper-beryllium alloy), the inner layer conductive member 3b is made of a conductive material such as copper, and the insulating member 3c is made of a resin such as polyurethane. From the viewpoint of elastic characteristics, mechanical strength, and electrical resistance, the outer layer conductive member 3a has an outer diameter of 0.10 mm to 0.15 mm, an inner diameter of 0.05 mm to 0.12 mm, and the inner layer conductive member 3b has a diameter of 0.03 mm to 0. It is preferable to select within a range of about 10 mm. In Embodiment 1, the outer layer conductive member 3a has an outer diameter of 0.10 mm, an inner diameter of 0.07 mm, and the inner layer conductive member 3b has a diameter of 0.05 mm. Further, by disposing the insulating member 3c, the outer conductive member 3a and the inner conductive member 3b can be reliably insulated, and the reliability can be improved.

  Further, in the first embodiment, the support member 3 has a configuration in which a covered conductive wire including the inner layer conductive member 3b and the insulating member 3c is disposed in the hollow portion of the tubular outer layer conductive member 3a. However, the configuration is not limited to this, and a so-called coaxial cable may be used in which a net-like outer layer conductive member 3a is disposed around the inner layer conductive member 3b, which is a single central conductor. At this time, the inner layer conductive member 3 b is fixed to the solder land 2 f, and the inner layer conductive member 3 b plays most of the role of elastically supporting the lens holder 2. In addition, in the normal coaxial cable, the outer conductive member 3a, the inner conductive member 3b, and the insulating member 3c are arranged in the hollow portion of the tubular insulating member 3c. Since the coaxial cable is inexpensive, the objective lens driving device 11 can be manufactured at a low cost.

  4A is a configuration diagram of the fixing member according to the first embodiment, and FIG. 4B is a configuration diagram of the fixing member to which the FPC is attached. The fixing member 4 is formed of a liquid crystal polymer containing glass filler which is an insulating material. The fixing member 4 includes a holding portion 4a for holding an FPC (flexible printed circuit board) 9, a through hole 4b through which the support member 3 provided on the holding portion 4a passes, and an opening 4c. The through-hole 4b and the opening 4c are filled with a damping gel 10. The through-holes 4b are not sized to pass through the support members 3 one by one, but are sized to pass two. As a result, the structure of the lens holder 2 can be simplified, and a large movable range of the support member 3 that elastically supports the lens holder 2 can be secured.

  The FPC 9 is attached to the fixing member 4 with an adhesive. The FPC 9 includes a solder land 9a having a through hole 9b through which the support member 3 passes and a solder land 9c having no through hole. The through hole 4b of the fixing member 4 and the through hole 9b of the FPC 9 are aligned so as to be continuous.

  FIG. 5A is a configuration diagram of a yoke in which the magnet according to the first embodiment is arranged, and FIG. 5B is a configuration diagram of another example. The yoke 5 is made of a magnetic material such as an iron alloy. As shown in FIG. 5 (a), the yoke 5 has a configuration in which the arm portion 5b extends in substantially the same direction from both ends toward the side where the lens holder 2 is disposed from the flat portion 5a to which the fixing member 4 is fixed. Yes. The yoke 5 is provided with two first standing yoke portions 5c and two second standing yoke portions 5d bent on the same side, side standing portions 5e and 5f, and standing portions 5g and 5h. Yes. The first standing yoke portion 5c is bent at a substantially right angle from a flat portion 5a immediately inside where the arm portion 5b extends. The second standing yoke portion 5d is formed by bending the arm portion 5b so that the arm portion 5b is bent inward so as to face each other at a substantially right angle, and further bending the arm portion 5b so as to face the first standing yoke portion 5c. The side standing portions 5e and 5f are bent so that the side portions of the flat portion 5a face each other. The standing portion 5g is formed by bending the inner portion of the arm portion 5b between the first standing yoke portion 5c and the second standing yoke portion 5d so as to face each other. The standing portion 5h is formed by bending the central portion of the flat portion 5a in the same direction as the first standing yoke portion 5c. In the first embodiment, there are two first erecting yoke portions 5c, but one or three or more may be used depending on the design.

  Further, in FIG. 5B, the second standing yoke portion 5d bends the arm portion 5b so that it rises at a substantially right angle with a fold in the oblique direction, and further has its tip portion opposed to the first standing yoke portion 5c. It is formed by bending. This structure requires less space. Therefore, it is easy to reduce the size of the optical pickup device. Moreover, the arm part 5b is good also as a structure bent into the L shape inside, and bending the bent part at right angle. Although there is an advantage that the number of bent portions is one, the space shown in FIGS. 5A and 5B requires less space.

  The magnet 8 is a permanent magnet. The magnet 8 is joined to the opposing surfaces of the first standing yoke portion 5c and the second standing yoke portion 5d by an anaerobic curable adhesive, an ultraviolet curable adhesive, a thermosetting adhesive, or the like. The magnet 8 is disposed so as to face the tracking coil 7 at a position shifted.

  FIG. 6A is a view seen from the side opposite to the fixed member showing the connection between the focus coil and tracking coil of the first embodiment and the support member, and FIG. 6B is a view seen from the fixed member side. . The focus coil 6 is covered with a coated conductive wire made of copper or a copper alloy. The focus coil 6 includes a first focus coil 6a and a second focus coil 6b. The first focus coil 6a and the second focus coil 6b are respectively fixed around the lower surface side of the second through hole 2b of the lens holder 2 with a thermosetting adhesive or an ultraviolet curable adhesive. In the first embodiment, both end portions of the lead wire 6c drawn out from the first focus coil 6a are soldered and fixed by the solder lands 2e of the terminal plate 2d on the same side. Further, both end portions of the lead wire 6d led out from the second focus coil 6b are fixed by being soldered with the solder lands 2e on the same side. On the other hand, the tracking coil 7 is wound with a coated conductive wire made of copper or a copper alloy. In the tracking coil 7 of the first embodiment, four windings are formed by the same conductive wire, and are one coil. The tracking coil 7 is fixed with a thermosetting adhesive, an ultraviolet curable adhesive, or the like in each of the cutout portions 2 c of the lens holder 2. Each tracking coil 7 arranged in each notch 2c is connected by a lead wire 7a, and both ends of the lead wire 7a of the tracking coil 7 are fixed by soldering with a solder land 2e.

  The support member 3 is fixed by soldering the outer layer conductive members 3a on both ends of the lens holder 2 one by one to the solder lands 2f arranged on the upper and lower two stages of the terminal board 2d. That is, the support members 3 are arranged in two rows and one row at both ends of the lens holder 2. Further, one of the inner layer conductive members 3b at both ends of the lens holder 2 is fixed by being soldered by the solder lands 2g of the terminal board 2d. Since the solder land 2e is electrically connected to the solder land 2f or the solder land 2g in the terminal plate 2d, the first focus coil 6a, the second focus coil 6b, and the tracking coil 7 are provided with four support members 3. It is electrically connected to any two conductive members of the four outer layer conductive members 3a or the two inner layer conductive members 3b. A set of two conductive members connected to the first focus coil 6a is connected to the first conductive member 3d, and a set of two conductive members connected to the second focus coil 6b is connected to the second conductive member 3e and the tracking coil 7. The set of two conductive members to be performed is referred to as a third conductive member 3f. In the first embodiment, the first conductive member 3d is the two left outer conductive members 3a in FIG. 6A, the second conductive member 3e is the two right outer conductive members 3a, and the third conductive member 3f is Two inner-layer conductive members 3b on the lower side of both sides were obtained. The conductive member includes a fourth conductive member 3g that is not connected to any of the first focus coil 6a, the second focus coil 6b, and the tracking coil 7. In the first embodiment, the fourth conductive member 3g is the two inner layer conductive members 3b on the upper stage on both sides that are not connected to the solder land 2g. The combination of the first conductive member 3d, the second conductive member 3e, the third conductive member 3f, the fourth conductive member 3g, the outer layer conductive member 3a, and the inner layer conductive member 3b is not limited to this, and may be determined by design. The number of the support members 3 is four, the support members 3 can be arranged symmetrically in the vertical and horizontal directions, and the lens holder 2 can be elastically supported with a good balance. In addition, the number of conductive members that can flow the combined current of the outer conductive member 3a and the inner conductive member 3b including the fourth conductive member 3g is eight, and the first focus coil 6a, the second focus coil 6b, Six of the conductive members necessary for connection to all of the tracking coils 7 can be secured.

  The fourth conductive member 3g may be eliminated, and the tracking coil 7 may be connected to two sets of third conductive members 3f. The solder lands 2g are increased by one on the terminal plates 2d at both ends, and connected to the solder lands 2e connected to the tracking coil 7 in the terminal plate 2d. The remaining inner layer conductive member 3b may be fixed by soldering with the newly provided solder land 2g. By using two sets of the third conductive member 3f, the electrical resistance of the third conductive member 3f can be halved. Therefore, a large drive current can be passed through the tracking coil 7 and the sensitivity of the objective lens drive device 11 can be increased. In the case of the first embodiment, it is not preferable to use two sets of conductive members connected to either the first focus coil 6a or the second focus coil 6b because the balance is lost. However, when three or more support members 3 are arranged at both ends of the lens holder 2, the first conductive member 3d and the second conductive member 3e may be set in two sets.

  When the outer layer conductive member 3a and the inner layer conductive member 3b have different electrical resistances, the number of outer layer conductive members 3a constituting the first conductive member 3d and the number of inner layer conductive members 3b and the second conductive member 3e are constituted. It is desirable that the number of outer layer conductive members 3a and the number of inner layer conductive members 3b be the same. Even if the electric resistances of the outer conductive member 3a and the inner conductive member 3b are different, the electric resistances of the first conductive member 3d and the second conductive member 3e can be made substantially equal. Therefore, the first focus coil 6a and the second focus coil The drive current flowing through 6b can be made substantially the same. For this reason, the sensitivity of the first focus coil 6a and the second focus coil 6b is substantially the same, so that the tilt control of the objective lens 1 with respect to the optical disk can be easily performed.

  The elastic characteristic of the support member 3 is a combination of the elastic characteristics of the outer layer conductive member 3a, the inner layer conductive member 3b, and the insulating member 3c, but the influence of the outer layer conductive member 3a directly fixed to the lens holder 2 is greatest.

  The first focus coil 6a and the second focus coil 6b of the first embodiment use single windings, but are not limited thereto. A coil in which a plurality of windings are formed by a single coated conductive wire, such as the tracking coil 6, may be used. Moreover, it is good also as a coil which connected several winding. In addition, although the tracking coil 7 is made of one coil with four windings, it is not limited to this. Another number of tracking coils may be used.

  In the first embodiment, the two focus coils 6 are used in combination with the first focus coil 6 a and the second focus coil 6 b, but the support member 3 in the first embodiment is combined with the tracking coil 7. Since up to four coils can be connected, three focus coils 6 or two tracking coils 7 may be used.

  Thus, the focus coil 6 and the tracking coil 7 are connected to the support member 3 on the outer surface of the terminal plate 2d. For this reason, a space for connection work is secured, so that the manufacturing is easy and the manufacturing cost can be reduced.

  FIG. 7 is a diagram illustrating the connection between the support member and the conductive wire on the fixing member side according to the first embodiment. The support member 3 passes through the through hole 4b of the fixing member 4 and the through hole 9b of the FPC 9 fixed to the fixing member 4, and the outer conductive member 3a is soldered by the solder land 9a of the FPC 9 on the opposite side of the fixing member 4. Attached and fixed. In other words, the fixing member 4 elastically supports the lens holder 2 via the support member 3 so as to be displaceable. The inner layer conductive member 3b soldered to the solder land 2g of the terminal board 2d is soldered and fixed to the solder land 9c. The fixing member 4 is fixed to the yoke 5. Since the surface to be soldered of the FPC 9 is provided on the side opposite to the lens holder 2 of the fixing member 4, a space for connection work is ensured and manufacturing is easy, and manufacturing cost can be suppressed low. As described above, when the fourth conductive member 3g is abolished and the tracking coil 7 is connected to two sets of the third conductive members 3f, the solder lands 9c on both sides are increased one by one, and the FPC 9 The solder land 9c on the side is made conductive. The inner layer conductive member 3b that is not connected to the solder land 9c may be soldered and fixed with the solder land 9c that is increased.

  Further, the opening 4 c of the fixing member 4 is filled with the damping gel 10, and the support member 3 is covered with the damping gel 10 at that portion. The damping gel 10 is a silicon resin or an acrylic resin, and softens vibrations and impacts transmitted from the fixing member 4 to the lens holder 2.

  In the first embodiment, the support members 3 are arranged in two steps and one row at both ends of the lens holder 2. However, when it is necessary to increase the support members 3 to six or more, two steps, two rows, etc. The number of columns may be increased and arranged in a plurality of columns. Further, increasing the number of steps is not preferable because it increases the thickness of the objective lens driving device 11. However, if the thickness of the objective lens driving device 11 is not restricted, the number of steps may be increased to three or more. When the number of support members 3 is increased to six or more, for example, the number of focus coils 6 or tracking coils 7 may be increased to improve the accuracy of focus control or tracking control. In some cases, a cooling device is mounted on the lens holder 2 in order to suppress temperature rise due to heat generation of the focus coil 6 and the tracking coil 7.

  Next, a manufacturing method will be described. FIG. 8A is a completed diagram of a terminal holder and a lens holder to which a focus coil and a tracking coil are attached, and FIG. 8B is an FPC attached thereto, illustrating the method of manufacturing the objective lens driving device according to the first embodiment. FIG. 8 (c) is a completed drawing of the supporting member, FIG. 8 (d) is a completed drawing of the assembly of the supporting member, the lens holder and the fixing member, and FIG. 8 (e) is a completed mounting of the objective lens. FIG. 8 (f) is a completed view of attaching the yoke on which the magnet is arranged, and FIG. 8 (g) is a completed view of the objective lens driving device into which the damping gel is injected.

  First, the terminal plate 2d, the focus coil 6 and the tracking coil 7 are fixed to the lens holder 2 molded as shown in FIG. Fixing is performed using an ultraviolet curable adhesive, a thermosetting adhesive, an anaerobic adhesive, or the like. Further, the lead wires 6c, 6d, 7a are soldered to the solder lands 2e of the terminal board 2d.

  Further, the FPC 9 is fixed to the fixing member 4 as shown in FIG. At that time, the through hole 4b of the fixing member 4 and the through hole 9b of the FPC 9 are aligned. Fixing is performed using an adhesive, an ultraviolet curable adhesive, a thermosetting adhesive, an anaerobic adhesive, or the like. A screw or the like may be used.

  Further, as shown in FIG. 8C, the supporting member 3 is manufactured in advance as a covered conductor in which an insulating member 3c is arranged around a hollow outer layer conductive member 3a and an inner layer conductive member 3b. The outer conductive member 3a is manufactured by stretching a tubular member having a large diameter. The plate-like member may be rounded into a tubular shape.

  Next, as shown in FIG. 8D, the support member 3, the lens holder 2, and the fixing member 4 are assembled. One end of the support member 3 is passed through the through hole 4b and the through hole 9b, and the other end is disposed at the solder land 2f of the terminal board 2d. The outer layer conductive member 3a, the solder land 2f and the solder land 9a are soldered and fixed. Further, the inner conductive member 3b, the solder land 2g and the solder land 9c are soldered and fixed.

  Next, as shown in FIG. 8E, the objective lens 1 is fixed to the upper part of the first through hole 2 a of the lens holder 2. Fixing is performed using an ultraviolet curable adhesive, a thermosetting adhesive, an anaerobic adhesive, or the like.

  Next, as shown in FIG. 8 (f), the fixing member 4 is attached to the flat portion 5a of the yoke 5 in which the magnet 8 is fixed to the first standing yoke portion 5c and the second standing yoke portion 5d of the yoke 5 in advance. Fix it. At that time, the yoke 5 is combined so that the standing portion 5g of the yoke 5 penetrates the second through hole 2b of the lens holder 2. The magnet 8 is fixed to the yoke 5 using an ultraviolet curable adhesive, a thermosetting adhesive, an anaerobic adhesive, or the like. The fixing member 4 is fixed to the yoke 5 using an ultraviolet curable adhesive, a thermosetting adhesive, an anaerobic adhesive, or the like. Any fixing may be used in combination with the above adhesive. In this step, it is desirable to adjust the posture of the objective lens 1 with respect to the yoke 5 to an appropriate one. This is because the objective lens driving device 11 is fixed to the optical pickup device main body by the yoke 5, so that the posture of the objective lens 1 can be made appropriate with respect to the optical pickup device main body.

  Finally, as shown in FIG. 8G, the damping gel 10 is injected into the opening 4c of the fixing member 4 to cover the periphery of the support member 3, and is cured by irradiating with ultraviolet rays to complete.

  When it is not necessary to adjust the posture of the objective lens 1 with respect to the yoke 5 to an appropriate one, the manufacturing method described above may not be used. For example, first, the terminal plate 2d, the focus coil 6 and the tracking coil 7 are fixed to the lens holder 2. Further, the lead wires 6c, 6d, 7a are soldered to the solder lands 2e of the terminal board 2d. Further, the FPC 9 is fixed to the fixing member 4. Moreover, the support member 3 is manufactured. Next, the fixing member 4 is fixed to the yoke 5 on which the magnet 8 is fixed in advance. Next, the support member 3 and the lens holder 2 are attached, and the outer layer conductive member 3a and the inner layer conductive member 3b are soldered. Next, the objective lens 1 is fixed to the lens holder 2. Finally, the damping gel 10 is injected and cured to complete. With such a manufacturing method, since the support member 3 and the lens holder 2 are attached in a state where the fixing member 4 is fixed to the yoke 5, handling is easy.

  In order to move the objective lens 1 mounted on the lens holder 2 in the focus direction of the optical disc, a current is supplied to at least one of the first focus coil 6a and the second focus coil 6b. In the case of the first focus coil 6a, the path is a path through which the drive current passes through the FPC 9, flows from the first conductive member 3d to the first focus coil 6a, and returns from the first conductive member 3d on the opposite side to the FPC 9. In the case of the second focus coil 6b, the drive current passes through the FPC 9, flows from the second conductive member 3e to the second focus coil 6b, and further returns from the opposite second conductive member 3e to the FPC 9. Then, electromagnetic force is generated between the magnetic field of the magnet 8 according to the current flowing through the first focus coil 6a or the second focus coil 6b, and the objective lens 1 moves in the focus direction. When the drive current passed through the first focus coil 6a and the drive current passed through the second focus coil 6b are changed, the electromagnetic force generated in each coil is different, so the amount of movement in the focus direction is also changed, and the attitude of the objective lens 1 is changed. be able to. Further, in order to move the objective lens 1 in the tracking direction of the optical disc, the drive current flows from the FPC 9 and the third conductive member 3f to the tracking coil 7, and further returns to the third conductive member 3f and the FPC 9 on the opposite side. Then, an electromagnetic force is generated between the magnet 8 and the magnetic field according to the current flowing through the tracking coil 7, and the objective lens 1 moves in the tracking direction.

  The objective lens driving device 11 according to the first embodiment configured and manufactured as described above has two stages of support members 3 arranged at both ends of the lens holder 2 and formed in a double structure of an outer layer and an inner layer. Since they are arranged in one row, there are a total of eight conductive members including the outer conductive member 3a and the inner conductive member 3b. Therefore, the first focus coil 6a and the set of first conductive members 3d, the second focus coil 6b and the set of second conductive members 3e, and the tracking coil 7 and the set of third conductive members 3f can be connected. As described above, since the current can flow independently to the first focus coil 6a, the second focus coil 6b, and the tracking coil 7, the tilt control of the objective lens 1 with respect to the optical disk can be performed. In addition, even in the gaps between the support members 3 equivalent to the conventional ones, the gap between the uppermost and lowermost support members 3 can be almost halved as compared with the case where the support members 3 are arranged in three stages. The lens driving device 11 can be thinned.

(Embodiment 2)
The second embodiment will be described with reference to the drawings. The second embodiment is an objective lens driving device in which the configuration of the first focus coil and the second focus coil is different from that of the objective lens driving device of the first embodiment. Except for the configuration of the first focus coil and the second focus coil and the connection with the support member, the description is the same as the description of the objective lens driving device and the manufacturing method thereof according to the first embodiment. FIG. 9 is a diagram showing the winding directions of the first focus coil and the second focus coil according to the second embodiment, and FIG. 10A shows the connection between the focus coil, the tracking coil, and the support member according to the second embodiment. FIG. 10B is a diagram viewed from the side opposite to the fixing member shown, and FIG. 10B is a diagram viewed from the side of the fixing member. As in the first embodiment, the focus coil 12 includes a first focus coil 12a and a second focus coil 12b.

  In FIG. 9, the first focus coil 12a is a coil in which two windings wound in the same direction are formed by one lead wire 12c. Two windings wound in the same direction may be connected by the lead wire 12c. The second focus coil 12b is a coil in which two windings wound in opposite directions are formed by a single lead wire 12d. Two windings wound in opposite directions may be connected by the lead wire 12d. When fixing to the lens holder 2, one winding of the first focus coil 12a and one winding of the second focus coil 12b are overlapped in one second through hole 2b, and the other second through hole 2b is overlapped. Is arranged by overlapping the other winding of the first focus coil 12a and the other winding of the second focus coil 12b.

  In FIG. 10, the support members 3 are arranged in two rows and one row on the terminal plates 2 d at both ends of the lens holder 2. The arrangement and wiring of the solder lands 2e, 2f, 2g of the terminal board 2d are as shown in FIGS. 2 (b) and 2 (c). The outer layer conductive member 3a of the support member 3 is soldered by the solder lands 2f of the terminal plate 2d, and one of the inner layer conductive members 3b at both ends is soldered by the solder lands 2g of the terminal plate 2d. The ends of the lead wire 12c of the first focus coil 12a, the lead wire 12d of the second focus coil 12b, and the lead wire 7a of the tracking coil 7 are soldered by solder lands 2e disposed on the terminal plate 2d. The solder land 2e is connected in advance to the solder land 2f or the solder land 2g in the terminal board 2d. Therefore, the two lead wires 12c of the first focus coil 12a, the two lead wires 12d of the second focus coil 12b, and the two lead wires 7a of the tracking coil 7 are the outer layer conductive member 3a or the inner layer conductive member of the support member 3, respectively. Any two of the members 3b are connected to the conductive member. The conductive member connected to the two lead wires 12c of the first focus coil 12a is referred to as a first conductive member 3d. The conductive member connected to the lead wire 12d of the second focus coil 12b is referred to as a second conductive member 3e. The conductive member connected to the lead wire 7a of the tracking coil 7 is referred to as a third conductive member 3f. A conductive member that is not connected to any coil is referred to as a fourth conductive member 3g. In the second embodiment, the first conductive member 3d is the upper outer conductive member 3a on both sides in FIGS. 10A and 10B, the second conductive member 3e is the lower outer conductive member 3a on the both sides, and the third conductive member 3e. The conductive member 3f is the lower inner conductive member 3b on both sides, and the fourth conductive member 3g is the upper inner conductive member 3b on both sides. However, the combination is not limited to this, and may be determined by design.

  A driving current flows from the first conductive member 3d to the first focus coil 12a and returns to the first conductive member 3d. A driving current flows from the second conductive member 3e to the second focus coil 12b and returns to the second conductive member 3e. When a driving current is passed through the first focus coil 12a, electromagnetic forces in the same direction are generated in the two windings of the first focus coil 12a, and both ends of the lens holder 2 are maintained in a parallel posture of the lens holder 2. Move in the focus direction of the optical disc. That is, when a drive current is passed through the first focus coil 12a, the entire objective lens 1 can be moved in the focus direction of the optical disc. On the other hand, when a drive current is passed through the second focus coil 12b, the directions of the windings are reversed, and electromagnetic forces in opposite directions are generated in the two windings of the second focus coil 12b. Therefore, one end of the lens holder 2 moves in the focus direction of the optical disc, and the other end moves in the opposite focus direction. Therefore, when a drive current is passed through the second focus coil 12b, tilt control of the objective lens 1 with respect to the optical disk can be performed.

  The fourth conductive member 3g is abolished, and the first focus coil 12a is connected to the two sets of first conductive members 3d, the second focus coil 12b is connected to the two sets of second conductive members 3e, or tracking. Any one of connecting the coil 7 to the two third conductive members 3f may be selected. In the case of the second embodiment, the first focus coil 12a has a function of moving the entire objective lens 1 in the focus direction, and the second focus coil 12b has a function of tilt control of the objective lens 1. Can work. Therefore, the first focus coil 12a can be connected to two sets of first conductive members 3d, and the second focus coil 12b can be connected to two sets of second conductive members 3e. By using two sets of conductive members, the electrical resistance of the conductive members can be reduced. Since a large amount of driving current can flow through the coils connected to the two sets of conductive members, the sensitivity of the objective lens driving device 11 can be increased. When three or more support members 3 are disposed at both ends of the lens holder 2, the first conductive member 3d, the second conductive member 3e, and the third conductive member 3f may be set in two sets.

  The objective lens driving device 11 of the second embodiment configured and manufactured as described above has two stages of support members 3 arranged at both ends of the lens holder 2 and formed of a double structure of an outer layer and an inner layer. Since they are arranged in one row, there are a total of eight conductive members including the outer conductive member 3a and the inner conductive member 3b. Therefore, the first focus coil 12a and the set of first conductive members 3d, the second focus coil 12b and the set of second conductive members 3e, and the tracking coil 7 and the set of third conductive members 3f can be connected. As described above, since current can flow independently through the first focus coil 12a, the second focus coil 12b, and the tracking coil 7, the tilt control of the objective lens 1 with respect to the optical disk can be performed. In addition, even in the gaps between the support members 3 equivalent to the conventional ones, the gap between the uppermost and lowermost support members 3 can be almost halved as compared with the case where the support members 3 are arranged in three stages. The lens driving device 11 can be thinned.

(Embodiment 3)
The third embodiment will be described with reference to the drawings. The third embodiment is an objective lens driving device in which a coated conducting wire on which at least one of a first focus coil, a second focus coil, or a tracking coil is formed is used as an inner layer conductive member as it is. Since the configuration excluding the connection between the inner layer conductive member, the focus coil and the tracking coil, and the terminal plate is the same as that in the first embodiment or the second embodiment, the description thereof is incorporated.

  FIG. 11A is a view seen from the side opposite to the fixed member showing the connection between the focus coil and tracking coil and the support member of the third embodiment, and FIG. 11B is a view seen from the fixed member side. . As in the first and second embodiments, the focus coil 13 includes a first focus coil 13a and a second focus coil 13b.

  In the third embodiment, the lead wire 14a of the tracking coil 14 is used as it is as the inner conductive member 3h. The winding of the focus coil 13 is the same as that of the first embodiment. Each terminal board 2h includes two solder lands 2e and two solder lands 2f. In other words, the terminal board 2h is obtained by eliminating the solder lands 2g of the terminal board 2d shown in FIGS. 2B and 2C and the solder lands 2e connected to the solder lands 2g. Lead wires 13c at both ends of the first focus coil 13a are soldered to the solder lands 2e of one terminal board 2h. The lead wires 13d at both ends of the second focus coil 13b are soldered to the solder lands 2e of the other terminal plate 2h. Further, the outer layer conductive member 3a of the support member 3 is soldered to each solder land 2f.

  Similarly to the first and second embodiments, the solder lands 2e and the solder lands 2f are preliminarily connected on the terminal board 2h, and a set of the solder lands 2e and the solder lands 2f is a terminal board. Two pairs are formed in 2h. The lead wire 14a on which the tracking coil 14 is formed is a coated conductor, and is directly passed through the hollow portion of the outer conductive member 3a as the inner conductive member 3h covered with the insulating member 3i, and further directly soldered to the solder land 9c of the FPC 9 Is done. In the third embodiment, the first conductive member 3d is the two left outer conductive members 3a in FIG. 11A, the second conductive member 3e is the two right outer conductive members 3a, and the third conductive member 3f is The two lower inner conductive members 3h and the fourth conductive member 3g on both sides are the two upper inner conductive members 3h on both sides. The two inner layer conductive members 3h constituting the third conductive member 3f form a tracking coil 14.

  In the third embodiment, the total number of solder lands 2e and solder lands 2f of one terminal board 2h is equal to the number of solder lands 2e and solder lands of one terminal board 2d in the first and second embodiments. Two less than the total number of 2f and solder land 2g. That is, the size of the terminal plate 2h can be made smaller than that of the terminal plate 2d, or the distance between the solder land 2e and the solder land 2f can be increased to facilitate the manufacture.

  In the third embodiment, the winding of the focus coil 13 is the same as that of the first embodiment, and both ends of the tracking coil 14 are the inner layer conductive members 3h. However, it is not limited to that. One end of the first focus coil 13a and one end of the second focus coil 13b may be used as the inner conductive member 3h. If two inner layer conductive members 3h on one side are used, both ends of the first focus coil 13a and the second focus coil 13b can be used as the inner layer conductive member 3h. At this time, one of the two outer layer conductive members 3 a on one side does not need to be connected to any of the focus coil 13 and the tracking coil 14. However, a total of four sets of the focus coil 13 and the tracking coil 14 may be used, and all of the outer layer conductive member 3a and the inner layer conductive member 3h on each side may be used. Since the necessary solder lands 2e remain two on one side, the focus coil 13 and the tracking coil 14 can be driven in total four sets while the size of the terminal plate 2h is kept small.

  The same is true if the winding of the focus coil 13 is the same as that of the second embodiment. In this case, any two of the first focus coil 13a, the second focus coil 13b, and the tracking coil 14 can be formed by the inner conductive member 3h.

  As described above, the objective lens driving device 11 according to the third embodiment uses the covered conductive wire on which the first focus coil 13a, the second focus coil 13b, or the tracking coil 14 is formed as it is as the inner conductive member 3h. And the space required for connection between the inner-layer conductive member 3h becomes unnecessary. Therefore, it is easy to make the objective lens driving device small.

(Embodiment 4)
The fourth embodiment will be described with reference to the drawings. The fourth embodiment is an optical pickup device using the objective lens driving device described in the first embodiment, the second embodiment, or the third embodiment. FIG. 12 is a configuration diagram of an optical system of the optical pickup device according to the fourth embodiment, and FIG. 13 is a configuration diagram from the top surface of the optical pickup device according to the fourth embodiment. In the optical pickup device 35 according to the fourth embodiment, the objective lens driving device 11 on which the objective lens 1 is mounted is fixed to the base 34. Further, the laser light source 21, the diffraction element 22, the beam splitter 23, the mirror 24, the collimating lens 25, the wave plate 26, the angle conversion prism 27, the rising prism 28, the astigmatism lens 30, the light receiving sensor 31, the filter 32, the front light. The monitor 33 is fixed to the base 34 directly or via an attachment member.

  First, the configuration will be described. Since the objective lens 1 and the objective lens driving device 11 are the same as those described in the first embodiment, the second embodiment, or the third embodiment, the description thereof is incorporated.

  The laser light source 21 is a so-called two-wavelength semiconductor laser that is a light source provided with a plurality of light emitting sources close to each other. The two-wavelength semiconductor laser has a light emitting source that emits laser light having a wavelength λ1 (about 650 nm) used for DVD and a light emitting source that emits laser light having a wavelength λ2 (about 780 nm) used for CD. The distance between both light sources is about 110 μm. The two-wavelength semiconductor laser has a so-called monolithic type two-wavelength semiconductor laser in which light sources having a plurality of wavelengths are integrated on one semiconductor substrate, and a so-called hybrid in which a plurality of laser elements having different wavelengths are arranged adjacent to each other in one package. There is a type 2 wavelength semiconductor laser. In the fourth embodiment, the former is used. The laser light source 21 is preferably a so-called frame laser in which a laser element is fixed to a frame via a submount from the viewpoint of making the optical pickup device 35 thinner. The laser light having the wavelength λ1 and the laser light having the wavelength λ2 emitted from the laser light source 21 are P-polarized light.

  The diffractive element 22 diffracts laser light having a wavelength λ1 into a transparent substrate such as optical glass, separates it into zero-order light and ± first-order light, and transmits the laser light having a wavelength λ2 as it is and a laser light having a wavelength λ1 And a diffraction grating that diffracts laser light having a wavelength λ2 and separates it into zero-order light and ± first-order light.

  As such a diffractive element 22, only concaves and convexes are formed on both surfaces of a transparent substrate, and the used wavelength, refractive index, grating depth, and diffraction efficiency are examined, and a diffraction grating that diffracts only laser light with wavelength λ 1 and laser with wavelength λ 2 A diffraction grating that only diffracts light may be provided. Also, a diffraction grating may be formed by using two materials, anomalous dispersion phenomenon may be caused by one material, and the refractive indexes of the two materials may be made equal at one wavelength and different at the other wavelength. .

  The beam splitter 23 is made of optical glass or optical plastic, and has an inclined surface 23a inside. A polarization separation film is formed on the inclined surface 23a. The polarization separation film transmits most of the P-polarized laser light and reflects a part thereof, and totally reflects the S-polarized laser light.

  The mirror 24 is for bending the optical path in order to make the optical system compact. A total reflection film is formed on the surface of the mirror 24.

  The collimating lens 25 is a lens for making laser light emitted from the laser light source 21 and diverging light substantially parallel. The collimating lens 25 is made of optical glass or optical plastic.

  The wave plate 26 converts the polarization of the laser light emitted from the laser light source 21 that is P-polarized light into circularly polarized light, and converts the laser light that is circularly polarized light reflected by the optical disk 29 into S-polarized light. The wave plate 26 is set to have a refractive index and a thickness so as to act on both the laser beam having the wavelength λ1 and the laser beam having the wavelength λ2.

  The angle conversion prism 27 optimizes the angle of the laser beam incident on the rising prism 28 and reduces the thickness of the rising prism 28 as much as possible. An angle is given in a direction perpendicular to the optical disk 29.

  The rising prism 28 is disposed immediately below the objective lens 1 and is a prism for raising the laser beam in a direction perpendicular to the optical disk 29.

  The optical disk 29 is a CD, a CD-ROM, a CD-R / RW, a DVD-ROM, a DVD ± R / RW, a DVD-RAM, etc., except for a read-only medium for CD and DVD. All can be recorded and played back. In the fourth embodiment, the CD and the DVD are used, but not only the combination thereof but also the combination with a so-called BD, HD DVD or the like does not lose its generality.

  The astigmatism lens 30 is a lens for giving astigmatism to the laser light reflected by the optical disk 29 in order to perform focus control by the astigmatism method. The astigmatism lens 30 is made of optical glass or optical plastic.

  The light receiving sensor 31 receives the laser light emitted from the laser light source 21 and reflected by the optical disk 29, converts the laser light into an electrical signal such as a tracking control signal, a focus control signal, and an RF signal and outputs the electrical signal.

  The filter 32 is used to make the light quantity of the laser light separated by the beam splitter 23 and incident on the front light monitor 33 into an appropriate value range. A light absorbing film may be provided on the side surface of the beam splitter 23 and used as the filter 32.

  The front light monitor 33 receives the laser light emitted from the laser light source 21 and reflected and separated by the beam splitter 23, converts the light amount into an electric signal, and outputs the electric signal. The electric signal is used to control the amount of laser light emitted from the laser light source 21.

  The base 34 forms a skeleton of the optical pickup device 35, and is formed of an alloy material such as a Zn alloy or an Mg alloy, or a hard resin material.

  In the objective lens driving device 11 equipped with the objective lens 1, the yoke 5 is bonded to the base 34. The laser light source 21, the diffraction element 22, the beam splitter 23, and the light receiving sensor 31 to which the astigmatism lens 30 is attached are attached to a common attachment member, and the attachment member is attached to the base 34. The mirror 24, the collimating lens 25, the wave plate 26, the angle conversion prism 27, and the rising prism 28 are attached to the base 34. A filter 32 and a front light monitor 33 are also attached to the base 34.

  Next, the optical path will be described. As shown in FIG. 12, the laser beams having wavelengths λ 1 and λ 2 emitted from the laser light source 21 are diffracted by the diffraction element 22, separated into zero-order light and ± first-order light, and enter the beam splitter 23. When the separated laser light is incident on the light receiving sensor 31, it is converted into an electrical signal for tracking control. A part of the laser light is reflected by the polarization separation film on the inclined surface 23 a of the beam splitter 23, passes through the filter 32, enters the front light monitor 33, and is converted into an electric signal for light amount control. Most of the transmitted laser light is reflected by the mirror 24 and enters the collimating lens 25. The collimating lens 25 converts the divergent light into substantially parallel light and enters the wave plate 26. The laser light incident on the wave plate 26 is converted from P-polarized linearly polarized light to circularly polarized light, enters the angle converting prism 27, changes its optical path slightly, and enters the rising prism 28. The laser beam incident on the rising prism 28 is changed in the direction substantially perpendicular to the optical disk 29 and incident on the objective lens 1, and the objective lens 1 is converted from substantially parallel light to focused light and incident on the optical disk 29. To do. The laser light incident on the optical disk 29 is focused on the recording surface of the optical disk 29.

  The laser beam reflected by the recording surface of the optical disk 29 passes through the objective lens 1, the rising prism 28, the angle conversion prism 27, the wave plate 26, and the collimator lens 25, is reflected by the mirror 24, and enters the beam splitter 23. The objective lens 1 converts the divergent light into substantially parallel light. The wave plate 26 converts the circularly polarized light into the linearly polarized light that is perpendicular to the forward polarized light, that is, S-polarized light. The collimating lens 25 converts the substantially parallel light into focused light. The laser light incident on the beam splitter 23 is totally reflected by the polarization separation film and enters the astigmatism lens 30. The laser beam given astigmatism by the astigmatism lens 30 enters the light receiving sensor 31, and is converted into an electric signal for focus control. Further, the light quantity of at least a part of the laser light incident on the light receiving sensor 31 is converted into an electrical signal for RF signal.

  The focus control signal and tracking control signal generated by the light receiving sensor 31 are sent to the optical disc apparatus main body. Then, a driving current is sent to the FPC 9 of the objective lens driving device 11, and the driving current flows from the FPC 9 to the first focus coil 6 a or 12 a, the second focus coil 6 b or 12 b, and the tracking coil 7 via the support member 3. Will occur. Thus, the objective lens 1 moves in the focus direction and the tracking direction with respect to the optical disk 29.

  As described above, the objective lens driving device 11 mounted on the optical pickup device 35 according to the fourth embodiment has two supporting members 3 which are arranged at both ends of the lens holder 2 and are formed in a double structure of the outer layer and the inner layer. Since they are arranged in one row, the total number of conductive members including the outer layer conductive member 3a and the inner layer conductive member 3b is eight. Therefore, the first focus coil 6a and the set of first conductive members 3d, the second focus coil 6b and the set of second conductive members 3e, and the tracking coil 7 and the set of third conductive members 3f can be connected. As described above, since the current can flow independently to the first focus coil 6a, the second focus coil 6b, and the tracking coil 7, the tilt control of the objective lens 1 with respect to the optical disk can be performed. In addition, even in the gaps between the support members 3 equivalent to the conventional ones, the gap between the uppermost and lowermost support members 3 can be almost halved as compared with the case where the support members 3 are arranged in three stages. The lens driving device 11 can be thinned. Therefore, the optical pickup device 35 of the fourth embodiment is thin and can handle all recording and reproduction of CDs and DVDs.

(Embodiment 5)
The fifth embodiment will be described with reference to the drawings. FIG. 14A is a top view of the configuration of the optical pickup module of the fifth embodiment, and FIG. 14B is a bottom view. FIG. 15 is a block diagram of the optical disk apparatus according to the fifth embodiment. The fifth embodiment is an optical disk device including the objective lens driving device described in the first, second, or third embodiment.

  In FIG. 14, the drive mechanism of the optical disk device 50 including a rotation drive unit that rotates the optical disk and a moving unit that moves the optical pickup device 35 closer to or away from the rotation drive unit is referred to as an optical pickup module 40. The base 41 forms a framework of the optical pickup module 40, and the optical pickup module 40 is configured by arranging each component directly or indirectly on the base 41.

  The rotation drive unit includes a spindle motor 42 having a turntable 42a on which an optical disk is placed. The spindle motor 42 is fixed to the base 41. The spindle motor 42 generates a rotational driving force that rotates the optical disk.

  The moving unit includes a feed motor 43, a screw shaft 44, and guide shafts 45 and 46. The feed motor 43 is fixed to the base 41. The feed motor 43 generates a rotational driving force necessary for the optical pickup device 35 to move between the inner periphery and the outer periphery of the optical disc. A stepping motor, a DC motor, or the like is used as the feed motor 43. The screw shaft 44 has a groove formed in a spiral shape, and is connected to the feed motor 43 directly or through several stages of gears. In the fifth embodiment, the feed motor 43 is connected via a gear. The guide shafts 45 and 46 are fixed to the base 41 via holding members at both ends. The guide shafts 45 and 46 support the optical pickup device 35 movably. The optical pickup device 35 includes a rack 47 having guide teeth that mesh with the grooves of the screw shaft 44. Since the rack 47 converts the rotational driving force of the feed motor 43 transmitted to the screw shaft 44 into a linear driving force, the optical pickup device 35 can move between the inner periphery and the outer periphery of the optical disc.

  Note that the rotation driving unit is not limited to the configuration described in the fifth embodiment as long as it can rotate the optical disk at a predetermined rotation speed. The moving unit is not limited to the configuration described in the fifth embodiment as long as it can move the optical pickup device 35 to a predetermined position between the inner periphery and the outer periphery of the optical disc.

  The optical pickup device 35 has a cover attached to the configuration of FIG. 13, and includes the objective lens driving device 11 including the objective lens 1 described in the first, second, or third embodiment. . Therefore, the optical pickup device 35 is thin and can handle all recording and reproduction of CDs and DVDs. The optical pickup device 35 performs at least one of recording and reproduction of information with respect to the optical disc, and for this purpose, emits laser light from the objective lens 1 toward the optical disc. The inclinations of the guide shafts 45 and 46 are adjusted by an adjustment mechanism that constitutes a holding member so that the laser light emitted from the objective lens 1 of the optical pickup device 35 enters the optical disk at a right angle.

  The FPC 48 electrically connects the optical pickup device 35 and the main body of the optical disk device 50. The FPC 48 is a conductive wire for supplying electric power to the optical pickup device 35 from the main body side of the optical disk device 50 and sending an electric signal, and for sending an electric signal from the optical pickup device 35 to the main body side of the optical disk device 50. It is also a conductive wire. A current also flows to the FPC 9 via the FPC 48.

  The cover 49 has an opening and exposes at least a part of the objective lens driving device 11 including the objective lens 1 of the optical pickup device 35 and the turntable 42 a of the spindle motor 42. Furthermore, in the case of the fifth embodiment, the feed motor 43 and the guide shaft 46 are also exposed so that the thickness of the optical pickup module 40 is reduced by the thickness of the cover 49.

  In FIG. 15, the casing 51 is configured by combining an upper casing 51a and a lower casing 51b and fixing them together using screws or the like. The tray 52 is provided in the casing 51 so as to freely appear and disappear. The tray 52 arranges the optical pickup module 40 from the lower surface side. The tray 52 has an opening and exposes at least a part of the objective lens driving device 11 including the objective lens 1, the turntable 42 a of the spindle motor 42, and at least a part of the cover 49. The bezel 53 is provided on the front end surface of the tray 52, and is configured to close the entrance / exit of the tray 52 when the tray 52 is stored in the housing 51. The bezel 53 is provided with an eject switch 54, and when the eject switch 54 is pressed, the engagement between the housing 51 and the tray 52 is released, and the tray 52 can be brought into and out of the housing 51. The rails 55 are slidably attached to both sides of the tray 52 and the casing 51, respectively. A circuit board (not shown) is provided inside the casing 51 and the tray 52, and a signal processing system IC, a power supply circuit, and the like are mounted thereon. The external connector 56 is connected to a power / signal line provided in an electronic device such as a computer. Then, power is supplied into the optical disc apparatus 50 via the external connector 56, an external electric signal is guided into the optical disc apparatus 50, or an electric signal generated by the optical disc apparatus 50 is sent to an electronic device or the like. To do.

  As described above, the objective lens driving device 11 mounted on the optical disk device 50 according to the fifth embodiment has two stages of support members 3 arranged at both ends of the lens holder 2 and formed in a double structure of the outer layer and the inner layer. Since they are arranged in one row, there are a total of eight conductive members including the outer conductive member 3a and the inner conductive member 3b. Therefore, the first focus coil 6a and the set of first conductive members 3d, the second focus coil 6b and the set of second conductive members 3e, and the tracking coil 7 and the set of third conductive members 3f can be connected. As described above, since the current can flow independently to the first focus coil 6a, the second focus coil 6b, and the tracking coil 7, the tilt control of the objective lens 1 with respect to the optical disk can be performed. In addition, even in the gaps between the support members 3 equivalent to the conventional ones, the gap between the uppermost and lowermost support members 3 can be almost halved as compared with the case where the support members 3 are arranged in three stages. The lens driving device 11 can be thinned. Therefore, the optical disk device 50 according to the fifth embodiment is thin and can support all recording and reproduction of CDs and DVDs.

  As described above, the objective lens driving device, the optical pickup device, and the optical disc device of the present invention can control the tilt of the objective lens with respect to the optical disc, and are thin, particularly preferred for electronic devices such as a thin notebook personal computer. Installed.

Configuration diagram of the objective lens driving device of the first embodiment (A) Configuration diagram of the lens holder of the first embodiment, (b) Arrangement and wiring diagram of the soldering land of the left terminal board of (a), (c) For soldering of the right terminal board of (a) Land layout and wiring diagram Configuration diagram of support member of Embodiment 1 (A) Configuration diagram of the fixing member of the first embodiment, (b) Configuration diagram of the fixing member to which the FPC is attached (A) The block diagram of the yoke which has arrange | positioned the magnet of this Embodiment 1, (b) The block diagram of another example (A) The figure seen from the fixed member side which shows the connection of the focus coil of this Embodiment 1, a tracking coil, and a support member, (b) The figure seen from the fixed member side The figure which shows the connection of the supporting member and conductive wire in the fixing member side of this Embodiment 1. (A) Terminal board of a diagram showing a manufacturing method of the objective lens driving device of the first embodiment, a completed drawing of a lens holder to which a focus coil and a tracking coil are attached, (b) a completed drawing of a fixing member to which an FPC is attached, (C) Completion drawing of support member, (d) Completion drawing of assembly of support member, lens holder and fixing member, (e) Completion drawing of attachment of objective lens, (f) Completion drawing of attachment of yoke on which magnet is arranged (G) Completion drawing of objective lens driving device injected with damping gel The figure which shows the winding direction of the 1st focus coil of this Embodiment 2, and a 2nd focus coil (A) The figure seen from the fixed member side which shows the connection of the focus coil of this Embodiment 2, a tracking coil, and a supporting member, (b) The figure seen from the fixing member side (A) The figure seen from the fixing member side which shows the connection of the focus coil of this Embodiment 3, a tracking coil, and a supporting member, (b) The figure seen from the fixing member side Configuration diagram of optical system of optical pickup device according to Embodiment 4 Configuration diagram from the top surface of the optical pickup device of the fourth embodiment (A) Top view of the configuration of the optical pickup module of the fifth embodiment, (b) Bottom view Configuration diagram of optical disk apparatus according to Embodiment 5 The figure which shows the objective-lens drive device of the conventional optical pick-up apparatus which can record and reproduce with respect to CD and DVD

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Objective lens 2 Lens holder 2a 1st through-hole 2b 2nd through-hole 2c Notch 2d, 2h Terminal board 2e, 2f, 2g Solder land 3 Support member 3a Outer-layer conductive member 3b, 3h Inner-layer conductive member 3c, 3i Insulation Member 3d First conductive member 3e Second conductive member 3f Third conductive member 3g Fourth conductive member 4 Fixing member 4a Holding portion 4b Through hole 4c Opening 5 Yoke 5a Flat portion 5b Arm portion 5c First standing yoke portion 5d Second Standing yoke part 5e, 5f Side standing part 5g, 5h Standing part 6 Focus coil 6a First focus coil 6b Second focus coil 6c, 6d Lead wire 7 Tracking coil 7a Lead wire 8 Magnet 9 FPC
9a, 9c Solder land 9b Through hole 10 Damping gel 11 Objective lens driving device 12, 13 Focus coil 12a, 13a First focus coil 12b, 13b Second focus coil 12c, 12d, 13c, 13d Lead wire 14 Tracking coil 14a Lead Line 21 Laser light source 22 Diffraction element 23 Beam splitter 23a Inclined surface 24 Mirror 25 Collimating lens 26 Wave plate 27 Angle conversion prism 28 Rising prism 29 Optical disk 30 Astigmatism lens 31 Light receiving sensor 32 Filter 33 Front light monitor 34 Base 35 Light Pickup device 40 Optical pickup module 41 Base 42 Spindle motor 42a Turntable 43 Feed motor 44 Screw shaft 45, 46 Guide shaft 7 rack 48 FPC
49 Cover 50 Optical Disk Device 51 Housing 51a Upper Housing 51b Lower Housing 52 Tray 53 Bezel 54 Eject Switch 55 Rail 56 External Connector

Claims (15)

A lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and a first holder that moves the other end of the lens holder in the focus direction of the optical disc. A two-focus coil, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a set of first conductive members that cause current to flow through the first focus coil, and a set of first that causes current to flow through the second focus coil A support member comprising a pair of conductive members and a pair of third conductive members for passing a current through the tracking coil, the support member being formed in a two-layer structure of an outer layer and an inner layer, Any one conductive member of the first conductive member, the set of second conductive members, and the set of third conductive members is the support portion. An objective lens driving device, characterized in the outer layer or that constitute one of the inner layer. A lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves both ends of the lens holder in the focus direction of the optical disc, and one end of the lens holder that moves in the focus direction of the optical disc A second focus coil that moves the lens holder in the opposite direction of the focus direction of the optical disc, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a pair of first conductive members that cause current to flow through the first focus coil, and A support member including a pair of second conductive members that cause current to flow through the second focus coil and a set of third conductive members that cause current to flow through the tracking coil. The support member includes an outer layer and an inner layer. The pair of first conductive members, the pair of second conductive members, and the pair An objective lens driving device set of third conductive any one of the conductive members of the member, characterized by being configured to either the outer or the inner layer of the support member. 3. The objective lens driving device according to claim 1, wherein the support members are arranged in two rows and one row at both ends of the lens holder. The objective lens driving device according to claim 1, wherein an insulating member is disposed between the outer layer and the inner layer. The objective lens driving device according to claim 4, wherein a coated conducting wire is constituted by the inner layer and the insulating member. 6. The objective lens driving device according to claim 5, wherein the inner layer forms at least one of the first focus coil, the second focus coil, or the tracking coil. The objective lens driving device according to claim 4, wherein the support member is a coaxial cable. 3. The objective lens driving device according to claim 1, wherein the support member includes a fourth conductive member that is not connected to any of the first focus coil, the second focus coil, and the tracking coil. 2. The objective lens driving device according to claim 1, wherein the number of outer layers and the number of inner layers constituting the first conductive member is the same as the number of outer layers and the number of inner layers constituting the second conductive member. . A flat part for fixing the fixing member; an arm part extending in substantially the same direction from both ends of the flat part; and a first standing yoke part bent at a substantially right angle between the flat part between the two arm parts; The both arm portions are folded inward at an oblique crease at a substantially right angle on the same side as the first standing yoke portion so that the tip portions of the both arm portions are opposed to the first standing yoke portion. The objective lens driving device according to claim 1, further comprising a yoke having a bent second standing yoke portion. The objective lens driving device according to claim 3, wherein a gap in which the support member is arranged in two stages on the lens holder is 1 mm or less. A lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and a first holder that moves the other end of the lens holder in the focus direction of the optical disc. A two-focus coil, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a set of first conductive members that cause current to flow through the first focus coil, and a set of first that causes current to flow through the second focus coil A support member comprising a pair of conductive members and a pair of third conductive members for passing a current through the tracking coil, the support member being formed in a two-layer structure of an outer layer and an inner layer, Any one conductive member of the first conductive member, the set of second conductive members, and the set of third conductive members is the support portion. Optical pickup apparatus comprising the objective lens driving device configured to either the outer or the inner layer. A lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves both ends of the lens holder in the focus direction of the optical disc, and one end of the lens holder that moves in the focus direction of the optical disc A second focus coil that moves the lens holder in the opposite direction of the focus direction of the optical disk, a tracking coil that moves the lens holder in the tracking direction of the optical disk, a pair of first conductive members that cause current to flow through the first focus coil, and A support member including a pair of second conductive members that cause current to flow through the second focus coil and a set of third conductive members that cause current to flow through the tracking coil. The support member includes an outer layer and an inner layer. The pair of first conductive members, the pair of second conductive members, and the pair The optical pickup device can be any one of the conductive member, characterized in that it includes an objective lens driving device configured to either the outer or the inner layer of the support member of the set of the third conductive member. A lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves one end of the lens holder in the focus direction of the optical disc, and a second holder that moves the other end of the lens holder in the focus direction of the optical disc. A two-focus coil, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a set of first conductive members that cause current to flow through the first focus coil, and a set of first that causes current to flow through the second focus coil A support member comprising a pair of conductive members and a pair of third conductive members for passing a current through the tracking coil, the support member being formed in a two-layer structure of an outer layer and an inner layer, Any one conductive member of the first conductive member, the set of second conductive members, and the set of third conductive members is the support portion. Optical disk apparatus comprising the objective lens driving device configured to either of the outer or the inner layer. A lens holder that holds an objective lens that emits laser light to an optical disc, a first focus coil that moves both ends of the lens holder in the focus direction of the optical disc, and one end of the lens holder that moves in the focus direction of the optical disc A second focus coil that moves the lens holder in the opposite direction of the focus direction of the optical disc, a tracking coil that moves the lens holder in the tracking direction of the optical disc, a pair of first conductive members that cause current to flow through the first focus coil, and A support member including a pair of second conductive members that cause current to flow through the second focus coil and a set of third conductive members that cause current to flow through the tracking coil. The support member includes an outer layer and an inner layer. The pair of first conductive members, the pair of second conductive members, and the pair Optical disc device set of third conductive any one of the conductive members of the member, characterized in that it includes an objective lens driving device configured to either the outer or the inner layer of the support member.

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