JP2009230786A - Optical head device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical head device capable of preventing an obstacle to movement of a lens holder due to relaxation of a crossover connecting coils. <P>SOLUTION: In the optical head device having the lens holder 80 holding an objective lens, tracking drive coils 91 and 92 attached to the lens holder 80 and a crossover 91b connectedly coupling the tracking drive coils 91 and 92 in a mutually separated state thereof, the lens holder 80 has projections 84f and 84g forming a plurality of roots having different lengths for passing the crossover 91b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical head device used for reproducing or recording an optical recording disk such as a CD (Compact Disk) or a DVD (Digital Versatile Disk).

  As a conventional optical head device, it has a movable base as a lens holder for holding an objective lens, and a plurality of coils mounted on the movable base, and a wire rod that is a terminal of the coil is soldered to a relay substrate on the movable base. 2. Description of the Related Art An optical pickup is known in which a wire rod is hung on a latching portion of a movable base when attached, thereby preventing a deflection floating from the movable base from being easily formed on the wire rod (see, for example, Patent Document 1).

By the way, it is known that a slim optical head device mounted on a notebook personal computer uses four coils for driving the objective lens in the tracking direction (see, for example, Patent Document 2). .) In the case of a configuration in which four coils are used for driving in the tracking direction, there is not enough space to connect and use the four coils with solder or the like, or the four coils with solder or the like. When connected and used, the weight of the lens holder increases, and therefore, a quadruple coil in which four coils are connected in series is generally used.
JP-A-9-161287 JP 2004-265480 A

  However, in the conventional optical head device using the quadruple coil, the length of the connecting wire connecting the coils varies among individuals due to the variation of the coil winding jig or the like in the mass production of the quadruple coil. As a result, there is a problem that an individual with a long crossover line loosens and floats from the lens holder. In the optical head device, when the crossover line is lifted from the lens holder, the crossover line lifted from the lens holder may hit another member and cause the lens holder to move.

  Here, it is conceivable to apply the technique of Patent Document 1. However, since the technique of patent document 1 is a technique of the process of the terminal of a coil, it cannot be applied with respect to the crossover which connects between coils. That is, even if the length of the terminal is longer than the design, it can be adjusted without slackening by increasing the length of the straight portion on the front end side from the portion hung on the hooking portion. When the length of the crossover wire is longer than the design, the slack cannot be eliminated. Since the connecting wire connecting the coils has coils on both sides, when the connecting wire is longer than the design, if one coil side portion is stretched, the other coil side portion is loosened. Because.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide an optical head device capable of preventing a lens holder from moving due to slack of a connecting wire connecting between coils.

  An optical head device of the present invention includes a lens holder that holds an objective lens, a plurality of drive coils attached to the lens holder, and a crossover that connects the plurality of drive coils in a row while being separated from each other. And the lens holder has an adjustment section for taking looseness of the crossover.

  With this configuration, the optical head device of the present invention can prevent the movement of the lens holder from being obstructed by the looseness of the crossover.

  It is preferable that the adjustment unit of the optical head device of the present invention is configured by a convex part around which the crossover is entangled.

  With this configuration, the optical head device of the present invention can suppress the projection from projecting from the outer wall of the lens holder, and can achieve downsizing.

  It is preferable that the adjusting unit of the optical head device of the present invention is configured by different routes for passing the connecting wire formed in the planar direction of the outer wall of the lens holder.

  With this configuration, the optical head device according to the present invention only needs to be inserted in a suitable route as compared with a configuration in which the crossover is loosened by the crossover being entangled with the convex portion. The workability of the line arrangement can be improved.

  It is preferable that the route of the optical head device of the present invention is constituted by two or more route forming convex portions formed at different locations in the planar direction of the outer wall of the lens holder.

  The lens holder of the optical head device of the present invention has a groove portion opened on the outer wall side, and the groove portion is provided with a convex portion on which the crossover is entangled or the route forming convex portion. It is preferable that

  With this configuration, the optical head device of the present invention can suppress the projection from projecting from the outer wall of the lens holder, and can achieve downsizing.

  The optical head device according to the present invention preferably includes a drive magnet disposed at a position facing the drive coil, and the adjustment portion is formed at a position facing the drive magnet. .

  Although the gap between the drive magnet and the lens holder is narrow, the optical head device of the present invention is capable of suppressing the looseness of the crossover line by the adjusting portion formed at a position facing the drive magnet, and thus faces the drive magnet. Even if the crossover is arranged at the position, it is possible to prevent the crossover from coming into contact with the drive magnet and causing the lens holder to move.

  ADVANTAGE OF THE INVENTION According to this invention, the optical head apparatus which can prevent the movement failure of a lens holder by the slack of the connecting wire which connects between coils can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  First, the configuration of the optical head device according to the present embodiment will be described.

  FIG. 1 is a perspective view of an optical head device 10 according to the present embodiment. FIG. 2 is an exploded perspective view of the optical head device 10. FIG. 3 is a perspective view of the optical head device 10 with some components removed.

  The optical head apparatus 10 shown in FIG. 1 reproduces information on an optical recording disk (not shown) such as a CD disk or a DVD disk by using a laser beam having a wavelength of 650 nm and a laser beam having a wavelength of 780 nm. And a two-wavelength optical head device capable of recording.

  As shown in FIGS. 1 to 3, the optical head device 10 includes a metal device frame 11 made of a die-cast product such as magnesium or zinc, and the device frame 11 disposed on the optical recording disk side with respect to the device frame 11. A laser light source device 21 as a laser light source including a metal cover 12 and a metal cover 13 covering the various components above, an AlGaInP-based semiconductor laser emitting a laser beam having a wavelength of 650 nm, and a laser having a wavelength of 780 nm A laser light source device 22 including an AlGaAs semiconductor laser that emits light, a laser light source device 21, a monitor light receiving element 23 for receiving laser light emitted by the laser light source device 22, and recording on an optical recording disk A signal detecting light receiving element 24 for receiving the laser light reflected by the surface, and a laser light source device 21; And an optical system 30 including an objective lens 31 for converging the laser light emitted by the laser light source device 22 on the recording surface of the optical recording disk, and an objective mounted on the apparatus frame 11 for servo-controlling the position of the objective lens 31. The lens driving mechanism 40 includes a laser light source device 21, a laser light source device 22, a monitor light receiving element 23, a signal detecting light receiving element 24, and a flexible circuit board 50 electrically connected to the objective lens driving mechanism 40. Yes.

  The apparatus frame 11 includes a bearing 11a and a bearing 11b that engage with a guide shaft and a feed screw shaft (not shown) for driving an optical recording disk, a positioning projection 11c for the metal cover 12, and a metal cover 12. And a claw 11d for fastening the head.

  The metal cover 12 includes a hole 12 a that fits into the protrusion 11 c of the device frame 11 and a groove 12 b that engages with the claw 11 d of the device frame 11.

  The metal cover 13 has a hole 13 a through which the laser light emitted from the objective lens 31 passes and covers the objective lens driving mechanism 40.

  The laser light source device 21, the laser light source device 22, and the monitor light receiving element 23 are mounted on the device frame 11 and covered with a metal cover 12.

  The optical system 30 transmits the laser light emitted from the laser light source device 21 and reflects the laser light emitted from the laser light source device 22, and an optical path combining polarizing prism 32, and between the laser light source device 21 and the polarizing prism 32. , A diffractive element 33 in which a half-wave plate is integrally formed, a diffractive element 34 and a relay lens 35 disposed between the laser light source device 22 and the polarizing prism 32, a monitor light receiving element 23 and a polarized light A half mirror 36 disposed between the prisms 32 to partially reflect the laser light emitted from the polarizing prism 32 and a phase difference of ¼ wavelength to the laser light emitted from the polarizing prism 32 and reflected by the half mirror 36. A quarter-wave plate 37 for generating a laser beam, and a collimating lens 38 for converting the laser light transmitted through the quarter-wave plate 37 into parallel light, And a raising mirror 39 to launch toward the optical recording disc, laser light which is collimated by Li formate lens 38.

  The polarizing prism 32, the diffractive element 33, the diffractive element 34, the relay lens 35, the half mirror 36, the quarter wavelength plate 37, the collimating lens 38, and the rising mirror 39 are mounted on the apparatus frame 11. The polarizing prism 32, the diffraction element 33, the diffraction element 34, the relay lens 35, the half mirror 36, and the quarter wavelength plate 37 are covered with the metal cover 12. The collimating lens 38 and the raising mirror 39 are covered with an objective lens driving mechanism 40.

  The flexible circuit board 50 is electrically connected to an end portion (not shown) electrically connected to the laser light source device 21, an end portion 50 b electrically connected to the laser light source device 22, and the monitor light receiving element 23. An end portion 50c to be connected, an end portion 50d electrically connected to the signal detection light-receiving element 24, and an end portion (not shown) electrically connected to the objective lens driving mechanism 40; It is partially bent and mounted three-dimensionally on the apparatus frame 11 and covered with a metal cover 12.

  FIG. 4 is a perspective view of the objective lens driving mechanism 40. 5A and 5B are a plan view and a right side view of the objective lens driving mechanism 40, respectively. 6A to 6C are a front view, a rear view, and a bottom view of the objective lens driving mechanism 40, respectively. In FIG. 4 and FIG. 6A, illustration of a gel-like cushioning material to be described later is omitted.

  As shown in FIG. 4 to FIG. 6, the objective lens driving mechanism 40 is substantially symmetric in the tracking direction indicated by the arrow Tr, and thus description of one side is omitted. The objective lens drive mechanism 40 includes a magnetic yoke 60 fixed to the apparatus frame 11 (see FIG. 2), drive magnets 71 and 72 attached to the yoke 60, and a lens holder 80 that holds the objective lens 31. , Tracking drive coils 91 and 92 as drive coils constituting a magnetic circuit for driving in the tracking direction indicated by the arrow Tr together with the drive magnets 71 and 72 attached to the lens holder 80, and drive magnets attached to the lens holder 80. A focusing drive coil 93 that constitutes a magnetic circuit for driving in the focusing direction indicated by arrow Fo together with 71 and 72, and a magnetic circuit for driving in the tilt direction indicated by arrow Ti together with drive magnets 71 and 72 attached to the lens holder 80 The tilt drive 94, wires 101 to 103 connected to the lens holder 80, a tracking direction indicated by an arrow Tr, a focusing direction indicated by an arrow Fo, and an arrow Ti fixed to the yoke 60 through the wires 101 to 103. The holder support member 110 that is movably supported in the tilt direction shown in FIG. 2 and the end portions (not shown) of the flexible circuit board 50 (see FIG. 2) and the wires 101 to 103 are electrically connected to the holder support member 110. A fixed substrate 120 and a screw 130 for fixing the lens holder 80 and the substrate 120 to the yoke 60 are provided.

  FIG. 7A is a plan view of the yoke 60, the holder support member 110, and the substrate 120. FIG. 7B is a right side view of the yoke 60, the holder support member 110, and the substrate 120. 8A and 8B are a cross-sectional view taken along the line AA and a cross-sectional view taken along the line BB in FIG. 7A, respectively. In FIG. 8B, illustration of a gel-like cushioning material to be described later is omitted.

  As shown in FIGS. 7 and 8, the yoke 60 includes a wall portion 61 to which the drive magnet 71 is fixed, a wall portion 62 that is arranged in parallel with the wall portion 61 and to which the drive magnet 72 is fixed, and a wall portion 61. And the wall part 62 is connected, the installation part 63 installed in the apparatus frame 11 (refer FIG. 2), and it is raised from the installation part 63, and is inserted in the focusing drive coil 93 (refer FIG. 5A). An insertion portion 64, a wall portion 65 arranged in parallel to the wall portion 62 on the opposite side of the wall portion 61 with respect to the wall portion 62, and the wall portion 62 and the wall portion 65 are connected to the wall portion 62. And a support portion 66 that supports the wall portion 65. The wall 61 includes cylindrical projections 61a and 61b used for positioning in the tracking direction indicated by an arrow Tr (see FIG. 5A) of the drive magnet 71, and an arrow Fo (FIG. 5B of the drive magnet 71). And a cylindrical projection 61c used for positioning in the focusing direction shown in FIG. The wall portion 62 includes cylindrical protrusions 62a and 62b used for positioning in the tracking direction indicated by the arrow Tr of the drive magnet 72, and cylindrical protrusions used for positioning in the focusing direction indicated by the arrow Fo of the drive magnet 72. 62c. The wall portion 65 has a screw hole 65a into which the screw 130 is screwed, and a hole 65b (see FIG. 4) that is opened on both sides of the screw hole 65a and used for positioning the holder support member 110. .

  The drive magnets 71 and 72 have an N pole on the insertion portion 64 side of the yoke 60.

  FIG. 9 is a perspective view of the lens holder 80 as viewed from the front side. FIG. 10 is an exploded perspective view of the lens holder 80.

  As shown in FIGS. 9 and 10, the lens holder 80 electrically connects the tracking drive coils 91 and 92, the focusing drive coil 93 and the tilt drive coil 94 to the wires 101 to 103 (see FIG. 4). The relay substrate 81 and a protective member 82 for preventing the optical recording disk and the objective lens 31 from coming into contact with each other by being disposed closer to the optical recording disk than the objective lens 31 (see FIG. 4) are adhered by an adhesive. It is attached.

  The relay substrate 81 includes lands 81a, 81b, and 81c to which wires 101, 102, and 103 are connected by solder, and a land 81d that is electrically connected to the land 81a and to which a focusing drive coil 93 is connected by solder, A land 81e electrically connected to the land 81b and connected to the tracking drive coil 91 by solder; and a land 81f electrically connected to the land 81c and connected to the tilt drive coil 94 by solder. ing.

  The protection member 82 is provided at both ends opposite to the arc-shaped portion 82a and an arc-shaped portion 82a that engages the outer side of the arc-shaped protrusion 83a provided on the lens holder 80 for fixing the objective lens 31. And an L-shaped notch 82b. Here, the lens holder 80 is provided with a protrusion 83b at a position corresponding to the notch 82b of the protection member 82. After the protective member 82 is placed on the upper surface 83c of the lens holder 80 in a state where a slight amount of anaerobic UV adhesive or volatile adhesive is applied to the upper surface 83c of the lens holder 80, and temporarily fixed by the adhesive, A hardened adhesive such as an ultraviolet curable epoxy is applied to the gap between the notch 82b and the projection 83b of the lens holder 80 so that the lens holder 80 is firmly fixed. The protection member 82 is prevented from falling to the protrusion 83 b side due to the presence of the protrusion 83 b of the lens holder 80.

  11A and 11B are a front view and a top view of the tracking drive coils 91 and 92, respectively.

  As shown in FIG. 11, the tracking drive coils 91 and 92 constitute a quadruple coil in which four coils are connected in series. From the tracking drive coils 91 arranged at both ends of the quadruple coils, lead wires 91a as terminals are provided. From the tracking drive coil 91 and the tracking drive coil 92, there is a connecting wire 91b that continuously connects the tracking drive coil 91 and the tracking drive coil 92 in a state of being separated from each other. From the two tracking drive coils 92, there is a connecting wire 92a that connects the two tracking drive coils 92 in a continuous manner in a state of being separated from each other.

  12A, 12B, and 12C are a front view, a bottom view, and a rear view of the lens holder 80, respectively. 13A, 13B, and 13C are a top view, a left side view, and a right side view of the lens holder 80, respectively. FIG. 14 is a perspective view of the lens holder 80 as viewed from the back side. FIG. 15 is a cross-sectional perspective view of the lens holder 80. FIG. 16A is a rear view of the lens holder 80 and is a diagram in a wiring state different from that in FIG. FIG. 16B is a rear view of the lens holder 80, and is a diagram in a wiring state different from FIGS. 12C and 16A.

  As shown in FIGS. 12 to 15, the tracking drive coil 91 is disposed in a groove portion 84 a provided on the outer wall on the front side of the lens holder 80 in order to prevent the tracking drive coil 91 from greatly protruding from the outer wall of the lens holder 80. The tracking drive coil 92 is disposed in a groove portion 84 b provided on the outer wall on the back side of the lens holder 80 in order to prevent the tracking drive coil 92 from greatly protruding from the outer wall of the lens holder 80. The lead wire 91a coming out of the tracking drive coil 91 is hooked on a protrusion 84c protruding to the side surface of the lens holder 80 and connected to the land 81e of the relay substrate 81 by solder. The crossover wire 91b coming out of the tracking drive coil 91 is hooked on the projection 84c of the lens holder 80, passes through the gap between the relay substrate 81 and the tilt drive coil 94, and is at the corner on the back side of the lens holder 80. Through the gap between the protrusion 84d protruding to the bottom side and the tilt drive coil 94, the bottom is provided on the back side of the lens holder 80, the bottom is formed on the outer wall side from the groove 84b, and is formed shallower than the groove 84b. The groove 84e is hooked by a convex portion 84f as a route forming convex portion provided at the bottom of the groove portion 84e and protruding to a position where the tip is flush with the outer wall, and is connected to the tracking drive coil 92. Yes. The groove portion 84e of the lens holder 80 is provided with a convex portion 84g as a route forming convex portion similar to the convex portion 84f. The crossover line 91b includes the longest route hooked on the convex portion 84f as shown in FIG. 12C, the second longest route hooked on the convex portion 84g as shown in FIG. 16A, and FIG. As shown in (b), it is possible to pass the route according to the length among the shortest routes that are not caught by either the convex portion 84f or the convex portion 84g. Here, the convex portions 84f and 84g constitute an adjusting portion that forms a plurality of routes having different lengths for passing the crossover wire 91b. The connecting wire 92a that connects the two tracking drive coils 92 is provided on the back side of the lens holder 80 and passes through the groove 84h having the same depth as the groove 84b. The lead wire 91a, the crossover wire 91b, and the crossover wire 92a are arranged so as not to float from the lens holder 80 after the tracking drive coils 91 and 92 are fixed to the lens holder 80.

  As shown in FIGS. 4 to 6, the tracking drive coil 91 is disposed between the drive magnet 71 and the insertion portion 64 of the yoke 60, one of the two sides extending in the focusing direction indicated by the arrow Fo. ing. Here, a magnetic field is generated between the drive magnet 71 and the insertion portion 64 of the yoke 60 in the direction indicated by the arrow 10a perpendicular to both the focusing direction indicated by the arrow Fo and the tracking direction indicated by the arrow Tr. ing. Therefore, the tracking drive coil 91 receives the electromagnetic force in the tracking direction indicated by the arrow Tr when the current is passed, and moves the objective lens 31 fixed to the lens holder 80 in the tracking direction indicated by the arrow Tr. Although the positional relationship between the tracking drive coil 91 and the drive magnet 71 and the insertion portion 64 of the yoke 60 has been described, the positional relationship between the tracking drive coil 92 and the drive magnet 72 and the insertion portion 64 of the yoke 60 is the same. . The tracking drive coils 91 and 92 are wired only in the tracking direction indicated by the arrow Tr by the objective lens 31 due to the electromagnetic force generated in the tracking drive coils 91 and 92 when a current is passed through the tracking drive coils 91 and 92. Properly set to move.

  As shown in FIGS. 12 and 13, the focusing drive coil 93 constitutes a double coil in which two coils are connected in series. From the two focusing drive coils 93, a lead wire 93a that is a terminal and a connecting wire 93b that connects the two focusing drive coils 93 in a continuous manner in a state of being separated from each other are provided.

  The focusing drive coil 93 is housed in a hole 85a that is open to the front side of the lens holder 80. The focusing drive coil 93 is accommodated in the hole 85 a from the front side of the lens holder 80 before the tracking drive coil 91 is fixed to the lens holder 80. The lead wire 93a coming out of the focusing drive coil 93 is connected to the land 81d of the relay substrate 81 by solder through a hole 85b formed in the side surface of the lens holder 80 on the back surface of the tracking drive coil 91. A connecting wire 93 b connecting the two focusing drive coils 93 is passed through the front side of the lens holder 80. The lead wire 93a and the connecting wire 93b are arranged so as not to float from the lens holder 80 after the focusing drive coil 93 is fixed to the lens holder 80.

  As shown in FIGS. 4 to 6, the focusing drive coil 93 is disposed between the drive magnet 71 and the insertion portion 64 of the yoke 60, one of the two sides extending in the tracking direction indicated by the arrow Tr. The remaining one side is disposed between the drive magnet 72 and the insertion portion 64 of the yoke 60. Here, a magnetic field is generated between the drive magnet 71 and the insertion portion 64 of the yoke 60 and between the drive magnet 72 and the insertion portion 64 of the yoke 60 in the direction indicated by the arrow 10a and opposite to each other. Yes. Accordingly, the focusing drive coil 93 receives an electromagnetic force in the focusing direction indicated by the arrow Fo when an electric current flows, and moves the objective lens 31 fixed to the lens holder 80 in the focusing direction indicated by the arrow Fo.

  As shown in FIGS. 12 and 13, the tilt drive coil 94 constitutes a double coil in which two coils are connected in series. From the two tilt drive coils 94, a lead wire 94a which is a terminal and a connecting wire 94b which connects the two tilt drive coils 94 in a state of being separated from each other are provided.

  The tilt drive coil 94 is housed in a hole 86 a that is open on the bottom surface side of the lens holder 80. The lead line 94a that is output from the tilt drive coil 94 passes through a gap between the relay board 81 and the tilt drive coil 94 and is connected to the land 81f of the relay board 81 by solder. A connecting wire 94 b connecting the two tilt drive coils 94 is passed through the back side of the lens holder 80. The lead wire 94 a and the crossover wire 94 b are arranged so as not to float from the lens holder 80 after the tilt drive coil 94 is fixed to the lens holder 80.

  As shown in FIGS. 4 to 6, the tilt drive coil 94 is disposed between the drive magnet 71 and the insertion portion 64 of the yoke 60, one of the two sides extending in the tracking direction indicated by the arrow Tr. The remaining one side is disposed between the drive magnet 72 and the insertion portion 64 of the yoke 60. Here, a magnetic field is generated between the drive magnet 71 and the insertion portion 64 of the yoke 60 and between the drive magnet 72 and the insertion portion 64 of the yoke 60 in the direction indicated by the arrow 10a and opposite to each other. Yes. Therefore, the two tilt drive coils 94 receive the electromagnetic force in the focusing direction indicated by the arrow Fo when an electric current is passed, and each of the two tilt drive coils 94 receives the opposite electromagnetic force, and moves the objective lens 31 fixed to the lens holder 80 to the arrow. It is moved in the tilt direction indicated by Ti.

  The wires 101 to 103 are wires having a predetermined spring constant and extend in the direction indicated by the arrow 10a, respectively, along the focusing direction indicated by the arrow Fo on both sides of the lens holder 80 in the tracking direction indicated by the arrow Tr. Arranged. The wires 101 to 103 are electrically connected to the focusing drive coil 93, the tracking drive coil 91, and the tilt drive coil 94 through the relay substrate 81 on the lens holder 80 at the end on the lens holder 80 side, respectively. The end portion on the 120 side is electrically connected to the substrate 120.

  The holder support member 110 includes a center hole (not shown) formed in the center and through which the screw 130 is passed, a protrusion 111 formed on both sides of the center hole and inserted into the hole 65b of the yoke 60 for positioning, and a center hole The projections 112 formed on both sides of the substrate 120 and used for positioning of the substrate 120 are formed on the opposite side of the center hole with respect to the projection 111 and opened to the lens holder 80 side, and the wires 101 to 103 are inserted. It has a gel pot 113 and holes 114, 115, 116 that communicate with the gel pot 113 and open to the substrate 120 side and into which wires 101, 102, 103 are inserted, respectively. The gel pot 113 of the holder support member 110 is filled with a gel-like cushioning material in which the wires 101 to 103 are embedded. The gel-like buffer material suppresses a resonance phenomenon that tends to occur in the lens holder 80 fixed to the wires 101 to 103 when the wires 101 to 103 are embedded.

  The substrate 120 is formed in the center and has a center hole (not shown) through which the screw 130 passes, a hole 121 formed on both sides of the center hole and into which the protrusion 112 of the holder support member 110 is inserted for positioning, and a hole 121. On the other hand, there are through holes 122 to 124 that are formed on the opposite side of the central hole and into which the wires 101 to 103 are inserted, respectively.

  As described above, in the optical head device 10, the route through which the crossover line 91 b passes is changed according to the degree of looseness of the crossover line 91 b between the tracking drive coil 91 and the tracking drive coil 92. Therefore, even if there is a variation in the length of the connecting wire 91b due to the variation between individuals in mass production, a sufficient tension is applied to the connecting wire 91b, and the movable obstacle of the lens holder 80 due to the looseness of the connecting wire 91b. Can be prevented. Further, since the optical head device 10 can suppress the looseness of the crossover line 91b only by changing the route through the crossover line 91b, the processing work of the crossover line 91b can be made easier than before.

  Further, since the optical head device 10 has the convex portions 84f and 84g constituting the adjustment portion in the groove portion 84e opened on the outer wall side of the lens holder 80, the convex portions 84f and 84g protrude from the outer wall of the lens holder 80. Can be suppressed, and downsizing can be realized.

  Although the gap between the drive magnet 72 and the lens holder 80 is narrow, the optical head device 10 is formed between the tracking drive coil 91 and the tracking drive coil 92 by the convex portions 84f and 84g formed at positions facing the drive magnet 72. Since the looseness of the connecting wire 91b can be suppressed, even if the connecting wire 91b is arranged at a position facing the driving magnet 72, the connecting wire 91b contacts the driving magnet 72 and the movable failure of the lens holder 80 is caused. Occurrence can be prevented.

  In the present embodiment, the optical head device 10 has an adjustment unit on the route of the crossover 91b between the tracking drive coil 91 and the tracking drive coil 92, but according to the present invention, You may have an adjustment part on the route of another crossover.

  Further, in the present embodiment, the optical head device 10 has the two convex portions 84f and 84g as the adjusting portion. However, according to the present invention, the optical head device 10 has a number of convex portions other than two as the adjusting portion. You may do it.

  In the optical head device 10, the adjustment unit forms a plurality of routes having different lengths for passing through the connecting wire 91 b, so that the connecting wire 91 b is loosened by the connecting wire 91 b being entangled with the convex portion. Compared with the configuration to be taken, it is only necessary to insert the crossover line 91b in a suitable route, and the workability of the arrangement of the crossover line 91b can be improved. Further, in the optical head device 10, the depth of the root groove 84e is slightly larger than the wire diameter of the crossover wire 91b as compared with the configuration in which the crossover wire 91b is entangled with the convex portion and the crossover wire 91b is loosened. Space efficiency can be improved because the depth is sufficient.

  The adjustment unit of the optical head device 10 may have a configuration in which the crossover line 91b is loosened by the crossover line 91b being entangled with the convex part. According to this configuration, the slackness of the connecting wire 91b can be adjusted by the number of times that the connecting wire 91b is entangled with the convex portion.

1 is a perspective view of an optical head device according to an embodiment of the present invention. It is a disassembled perspective view of the optical head apparatus shown in FIG. FIG. 2 is a perspective view of the optical head device shown in FIG. 1 with some components removed. FIG. 2 is a perspective view of the objective lens driving mechanism shown in FIG. 1, in which the gel-like cushioning material is not shown. (A) It is a top view of the objective lens drive mechanism shown in FIG. (B) It is a right view of the objective lens drive mechanism shown in FIG. (A) It is a front view of the objective-lens drive mechanism shown in FIG. 1, Comprising: It is the figure which abbreviate | omitted illustration of the gel-like buffer material. (B) It is a rear view of the objective lens drive mechanism shown in FIG. (C) It is a bottom view of the objective lens drive mechanism shown in FIG. (A) It is a top view of the yoke shown in FIG. 2, a holder support member, and a board | substrate. (B) It is a right view of the yoke shown in FIG. 2, a holder support member, and a board | substrate. (A) It is AA arrow sectional drawing of Fig.7 (a). (B) It is BB arrow sectional drawing of Fig.7 (a), Comprising: It is the figure which abbreviate | omitted illustration of the gel-like buffer material. It is the perspective view seen from the front side of the lens holder shown in FIG. It is a disassembled perspective view of the lens holder shown in FIG. (A) It is a front view of the tracking drive coil shown in FIG. (B) It is a top view of the tracking drive coil shown in FIG. (A) It is a front view of the lens holder shown in FIG. (B) It is a bottom view of the lens holder shown in FIG. (C) It is a rear view of the lens holder shown in FIG. (A) It is a top view of the lens holder shown in FIG. (B) It is a left view of the lens holder shown in FIG. (C) It is a right view of the lens holder shown in FIG. It is the perspective view seen from the back side of the lens holder shown in FIG. It is a cross-sectional perspective view of the lens holder shown in FIG. (A) It is a rear view of the lens holder shown in FIG. 1, Comprising: It is a figure in the wiring condition different from FIG.12 (c). (B) It is a back view of the lens holder shown in FIG. 1, Comprising: It is a figure in the wiring condition different from FIG.12 (c) and FIG.16 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical head apparatus 31 Objective lens 72 Drive magnet 80 Lens holder 84e Groove part 84f, 84g Convex part (convex part for route formation)
91, 92 Tracking drive coil (drive coil)
91b Crossover

Claims (6)

A lens holder for holding the objective lens, a plurality of drive coils mounted on the lens holder, and a crossover that connects the plurality of drive coils in a continuous manner in a state of being separated from each other,
2. The optical head device according to claim 1, wherein the lens holder has an adjustment unit for removing the looseness of the crossover.   The optical head device according to claim 1, wherein the adjustment unit is configured by a convex portion around which the crossover is entangled.   2. The optical head device according to claim 1, wherein the adjustment unit is configured by different routes for passing the connecting wire formed in a planar direction of an outer wall of the lens holder.   4. The optical head device according to claim 3, wherein the route is constituted by two or more route forming convex portions formed at different locations in the planar direction of the outer wall of the lens holder.   3. The lens holder according to claim 2, wherein the lens holder has a groove portion opened on an outer wall side, and a convex portion or the route forming convex portion on which the connecting wire is entangled is provided in the groove portion. Item 4. The optical head device according to Item 3. A drive magnet disposed at a position facing the drive coil;
6. The optical head device according to claim 1, wherein the adjustment unit is formed at a position facing the drive magnet.

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