JP2014022024A - Optical pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach or detach a cable to or from a connector without detaching a cover from a housing.SOLUTION: An optical pickup device comprises: a first optical component including a laser diode and configured to guide a laser beam, emitted from the laser diode, to the signal recording side of an optical disk; a second optical component including a photo-detector and configured to guide the reflection light of the laser beam, reflected from the signal recording side of the optical disk, to the photoreceptor; a connector electrically connected with output from the photo-detector; a circuit substrate on which the connector is arranged; a housing in which the first optical component, second optical component, connector, and circuit substrate are placed; and a cover covering the housing with the first optical component, second optical component, connector, and circuit substrate placed therein. The connector has an operation piece operated when the cable is attached to or detached from the connector. The cover has a notch for exposing the connector so that the operation piece is operable.

Description

  The present invention relates to an optical pickup device.

  For example, it is configured to include a photodetector that is irradiated with laser light reflected by an optical disc, a housing on which a circuit board or the like on which the photodetector is disposed, and a cover that covers the housing. An optical pickup device is known (Patent Document 1).

JP 2009-37671 A

  Generally, a cable is attached to the optical pickup device in order to extract the output of the photodetector in the optical pickup device of Patent Document 1 to the outside. For example, the cable may be attached to the optical pickup device by fixing one end of the cable to a circuit board in the housing. In this case, when the cable is attached to the optical pickup device, it is necessary to remove the cover from the housing, and there is a possibility that the work of attaching the cable to the optical pickup device becomes complicated.

  The main present invention that solves the above-described problems includes a laser diode, a first optical component that guides laser light emitted from the laser diode to a signal recording surface of the optical disc, and a photodetector. A second optical component for guiding reflected light of the laser light reflected from the recording surface to the photodetector, a connector electrically connected to an output of the photodetector, and a circuit board on which the connector is disposed And a housing on which the first optical component, the second optical component, the connector, and the circuit board are placed, and the first optical component, the second optical component, the connector, and the circuit board are placed. And a cover that covers the housing in a state where the connector is in a state where the connector has an operation piece that is operated when a cable is attached to or detached from the connector. An optical pickup device characterized by having a notch the connector is exposed to serial operation piece becomes operational.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the present invention, the cable can be attached to and detached from the connector without removing the cover from the housing.

It is a figure which shows the structure of the optical system of the optical pick-up apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of a part of optical system of the optical pick-up apparatus which concerns on embodiment of this invention. 1 is a perspective view showing an optical pickup device according to an embodiment of the present invention. 1 is an exploded perspective view showing an optical pickup device according to an embodiment of the present invention. It is a perspective view which shows the housing in embodiment of this invention. It is a perspective view which shows the housing in the state to which the optical element and the 1st and 2nd heat sink in the embodiment of this invention were fixed. It is a perspective view which shows the laser light source in embodiment of this invention. It is a perspective view showing a housing in the state where a circuit board was fixed in an embodiment of the present invention. It is a figure which shows the circuit board and FPC of the state seen from the optical disk side in embodiment of this invention. It is a figure which shows the circuit board and FPC of the state seen from the opposite side to the optical disk side in embodiment of this invention. It is a figure which shows the connector of the state in which the lever in embodiment of this invention was rotated. It is a figure which shows the connector in embodiment of this invention. It is a perspective view which shows the cover in embodiment of this invention. It is a perspective view which shows the housing to which the optical element was fixed in the state seen from the opposite side to the side which opposes the optical disk in embodiment of this invention. It is a perspective view which shows the 1st and 2nd heat sink and circuit board in embodiment of this invention. It is a perspective view which shows the optical pick-up apparatus in the state in which the flexible cable was attached in embodiment of this invention.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== Optical System of Optical Pickup Device ===
Hereinafter, the optical system of the optical pickup device according to the present embodiment will be described with reference to FIGS. FIG. 1 is a diagram illustrating a configuration of an optical system of the optical pickup device according to the present embodiment. FIG. 2 is a diagram illustrating a partial configuration of an optical system of the optical pickup device according to the present embodiment.

  The optical pickup device 100 is a device that irradiates a rotating optical disc 5 (FIG. 3) with laser light and detects reflected light of the laser light reflected by the optical disc 5. The optical disc 5 on which information is recorded or reproduced by the optical pickup device 100 includes a DVD (Digital Versatile Disc) standard optical disc (hereinafter referred to as “first optical disc 5A”), a CD (Compact Disc) standard optical disc (hereinafter referred to as “Compact Disc” standard optical disc). (Referred to as “second optical disk 5B”). The optical pickup device 100 has an optical system along the optical path of the laser light applied to the first optical disc 5A and the second optical disc 5B.

  The optical system of the optical pickup device 100 is an optical system for DVD standard and CD standard, and includes a laser light source 11 (laser diode), a diffraction grating 12, a photodetector 13, a detection lens 14, a beam splitter 15, and a quarter wavelength. The plate 16, the collimating lens 17, the rising mirror 18, the front monitor diode 19, and the objective lens 611 (FIG. 2) (hereinafter also referred to as “optical element of the optical pickup device 100”).

  The laser light source 11 has a wavelength of, for example, 655 nm in the red wavelength band (645 nm to 675 nm) irradiated to the first optical disc 5A, and a wavelength of, for example, 785 nm in the infrared wavelength band (765 nm to 805 nm) irradiated to the second optical disc 5B. The laser beams of two different wavelengths are selectively emitted. The laser light source 11 includes a first laser diode 111 that emits laser light having a wavelength of 655 nm, for example, and a second laser diode 112 that emits laser light having a wavelength of 785 nm, for example.

  The diffraction grating 12 generates 0th order light, + 1st order diffracted light, and −1st order diffracted light from the laser light emitted from the laser light source 11.

  The beam splitter 15 is, for example, a flat beam splitter that reflects P-polarized laser light and transmits S-polarized laser light. The beam splitter 15 reflects the P-polarized laser light incident from the diffraction grating 12 in the direction of the quarter-wave plate 16. At this time, the beam splitter 15 transmits a part of the laser light in the direction of the front monitor diode 19 in order to adjust the intensity of the laser light. The front monitor diode 19 is an optical component for adjusting the intensity of the laser beam based on the intensity of a part of the laser beam incident from the beam splitter 15. The reflected light of the laser light incident from the quarter wavelength plate 16 is reflected by, for example, the first optical disk 5A or the second optical disk 5B to become S-polarized laser light. Therefore, the beam splitter 15 transmits the reflected light of the laser light in the direction of the detection lens 14.

The quarter wave plate 16 converts the laser light incident from the beam splitter 15 from linearly polarized light to circularly polarized light. The quarter-wave plate 16 converts the reflected light of the laser light incident from the collimating lens 17 from circularly polarized light to linearly polarized light.
The collimating lens 17 converts the laser light incident from the quarter wavelength plate 16 into parallel light.

  The rising mirror 18 reflects the laser light incident from the collimating lens 17 in a direction perpendicular to the signal recording surface of the first optical disc 5A or the second optical disc 5B. The rising mirror 18 reflects the reflected light of the laser light incident from the objective lens 611 in the direction of the collimating lens 17.

  The objective lens 611 focuses the laser light incident from the rising mirror 18 on the signal recording layer on the signal recording surface of the first optical disc 5A or the second optical disc 5B.

  The reflected light of the laser light reflected by the signal recording layer of the first optical disk 5A or the second optical disk 5B is converted into parallel light by the objective lens 611, and then is ¼ wavelength via the rising mirror 18 and the collimating lens 17. The light enters the plate 16 and is converted from circularly polarized light to linearly polarized light by the quarter-wave plate 16. The reflected light of the laser light that has become linearly polarized light enters the detection lens 14 via the beam splitter 15.

  The detection lens 14 collects the reflected light of the laser light incident from the beam splitter 15 on the photodetector 13 and generates astigmatism in the reflected light of the laser light to generate a focus error signal. The focus error signal is, for example, a signal used when the lens holder 300 (FIG. 4) is displaced in the optical axis direction of the objective lens 611 (Z axis in FIG. 4).

  The photodetector 13 photoelectrically converts the reflected light of the laser beam incident from the detection lens 14 and outputs an electrical signal. The laser light source 11, the diffraction grating 12, the beam splitter 15, the quarter wavelength plate 16, the collimating lens 17, the rising mirror 18, and the objective lens 611 correspond to the first optical component. The photodetector 13, the detection lens 14, the beam splitter 15, the quarter wavelength plate 16, the collimator lens 17, the rising mirror 18, and the objective lens 611 correspond to the second optical component.

=== Optical Pickup Device ===
The optical pickup device according to this embodiment will be described below with reference to FIGS. FIG. 3 is a perspective view showing the optical pickup device according to the present embodiment. A rotating shaft 50 of a spindle motor (not shown) for rotating the optical disc 5 is indicated by a one-dot chain line for convenience of explanation. The optical disk 5 is indicated by a dotted line with a part thereof omitted. Furthermore, a line 50A connecting the tip of the protruding portion 891 and the tip of the protruding portion 892 is indicated by an alternate long and short dash line for convenience of explanation. FIG. 4 is an exploded perspective view showing the optical pickup device according to the present embodiment.

  In the present embodiment, the Z-axis is an axis along the longitudinal direction (focus direction, vertical direction) of the rotation shaft 50 of the spindle motor that rotates the optical disc 5, and the direction from the optical pickup device 100 toward the optical disc 5 (upper side). The direction from the optical disk 5 toward the optical pickup device 100 (downward) is the −Z direction. Of the first optical disc 5A and the second optical disc 5B, the optical disc rotated by the spindle motor is referred to as the optical disc 5 for convenience of explanation. The X axis is an axis along the direction in which the optical pickup device 100 moves in the radial direction (tracking direction, radial direction) of the optical disc 5, and the direction in which the optical pickup device 100 moves away from the rotating shaft 50 is defined as the + X direction. A direction in which 100 approaches the rotation axis 50 is defined as a −X direction. The Y axis is an axis along the tangential direction of the optical disc 5, and the direction from one side surface 21 to the other side surface 22 in the housing 2 is the + Y direction, and the other side surface 22 in the housing 2 is directed to the one side surface 21. Let the direction be the -Y direction.

  The optical pickup device 100 (FIG. 4) includes a housing 2, an optical element of the optical pickup device 100, an actuator 3, a first heat radiating plate 41, a second heat radiating plate 42, a circuit board 6, and a flexible printed circuit (FPC). 7 and 700 and a cover 8.

  The actuator 3 is a device that displaces the lens holder 300 in the focus direction and the tracking direction. The circuit board 6 and the FPCs 7 and 700 are boards for controlling the optical pickup device 100. The first heat radiating plate 41 is a metal plate for radiating heat generated by the laser light source 11. The second heat radiating plate 42 is a metal plate for radiating heat generated by the driver IC 61 (FIG. 10). The cover 8 is a metal lid that covers the housing 2. The optical element of the optical pickup device 100 and the actuator 3 are placed on the housing 2.

=== Housing ===
Hereinafter, the housing in the present embodiment will be described with reference to FIGS. 4 and 5. FIG. 5 is a perspective view showing a housing in the present embodiment. A rotating shaft 50 of a spindle motor for rotating the optical disc 5 is indicated by a one-dot chain line for convenience of explanation.

  The housing 2 is, for example, a resin housing on which the optical element of the optical pickup device 100 and the actuator 3 are placed. Furthermore, a first heat radiating plate 41, a second heat radiating plate 42, a circuit board 6, FPCs 7 and 700, and a cover 8 are attached to the housing 2.

  The housing 2 has a shape extending in the tangential direction (Y-axis direction). The end (23) on the side close to the rotation axis 50 in the tracking direction (-X) has, for example, a shape bent with a predetermined curvature so as to avoid a spindle motor (not shown). The width in the tangential direction of the end portion 24 (+ X) far from the rotation shaft 50 in the tracking direction becomes shorter as the distance from the rotation shaft 50 increases, for example, in order to reduce the size of the housing 2.

  The housing 2 includes depressions 231 to 233, a plurality of protrusions 251 to 253, claws 261 to 264, holes 265, grooves 255 to 258, bearings 210, 220, and 221 and a female screw 25.

  The actuator 3 is placed in the recess 233. The depression 233 is provided on the side close to the rotation axis 50 in the tracking direction (−X) and on the side surface 22 side in the tangential direction (+ Y).

  The second heat radiating plate 42 is placed in the recess 232. The depression 232 is provided on the side (+ X) farther from the rotation shaft 50 than the depression 233 in the tracking direction. The recess 232 has a shape extending along the tangential direction. The depth of one side (−Y) of the depression 232 in the tangential direction is deeper than the depth of the other side (+ Y) of the depression 232. Accordingly, the recess 232 has a shape such that the bottom of the recess 232 is along the lower (−Z) surface of the second heat radiating plate 42.

  The laser light source 11 is placed in the recess 231. The laser light source 11 will be described later. The depression 231 is provided on the side farther from the rotation shaft 50 than the depression 233 in the tracking direction and on the −Y side of the depression 232 in the tangential direction. A hole 25 </ b> A is provided at the bottom on the + X side in the recess 231. The hole 25 </ b> A is formed so that the terminals 111 to 113 of the laser light source 11 placed on the bottom of the recess 231 are exposed on the side (−Z) opposite to the side facing the optical disk 5.

  The plurality of protrusions 251 to 253 are used for positioning the circuit board 6 with respect to the housing 2. The protrusion 253 is used to position the second heat radiating plate 42 with respect to the housing 2. The protrusion 253 is provided at a position facing the hole 421 (FIG. 4) of the second heat radiating plate 42 when the second heat radiating plate 42 is fixed to the housing 2. The protrusions 251 to 253 are provided at positions facing the holes 651 to 653 (FIG. 10) of the circuit board 6 when the circuit board 6 is fixed to the housing 2.

  An adhesive is applied to the grooves 255 to 258 when the laser light source 11 is fixed to the housing 2. The fixing of the laser light source 11 to the housing 2 will be described later. The grooves 255 to 258 are formed at positions facing the four corners of the metal plate 114 (FIG. 7) of the laser light source 11 when the laser light source 11 is placed on the bottom of the recess 231.

  The claw 262 is a member for fixing the first heat radiating plate 41 to the housing 2. The claw 262 is provided at a position facing the hole 411 of the first heat radiating plate 41 when the first heat radiating plate 41 is fixed to the housing 2. The claw 262 has a shape that is inserted into the hole 411 and engages with the first heat radiating plate 41.

  The claws 263 and 264 are a pair of members for fixing the circuit board 6 to the housing 2. The claw 263 is provided on the wall body 215 that faces one end (−Y) of the circuit board 6 when the circuit board 6 is fixed to the housing 2. The claw 264 is provided on the wall body 225 that faces the other end (+ Y) of the circuit board 6 when the circuit board 6 is fixed to the housing 2. In the claw 263, the distance in the tangential direction between the inner (+ Y) surface of the wall body 215 and the + Y side surface of the claw 263 becomes longer as it goes from the upper side (+ Z) to the lower side (−Z). It exhibits such a shape. That is, the claw 263 has a shape in which the + Y side surface of the claw 263 is inclined toward the + Y side and the lower side. The claw 264 has a shape such that the distance in the tangential direction between the inner (−Y) surface of the wall body 225 and the −Y side surface of the claw 264 increases from the upper side to the lower side. . That is, the claw 264 has a shape in which the surface on the −Y side of the claw 264 is inclined toward the −Y side and the lower side. For example, when the circuit board 6 is attached to the housing 2, one end and the other end of the circuit board 6 are along the + Y side surface of the claw 263 and the −Y side surface of the claw 264, respectively. The claw 263, 264 is moved from the upper side to the lower side of the claw 263, 264. The claws 263 and 264 are bottom plates of the housing 2 in the focus (Z-axis) direction when the ends of the circuit board 6 are disposed below the claws 263 and 264, respectively. It is assumed that it is provided at a position so as to be sandwiched between the upper surface and the claws 263 and 264. At this time, the movement of the circuit board 6 in the focus direction is restricted and fixed to the housing 2.

  The claw 261 and the hole 265 are used to fix the cover 8 to the housing 2. The claw 261 and the hole 265 are provided at positions facing the attachment piece 81 and the attachment piece 82 of the cover 8 (FIG. 13), respectively, when the cover 8 is fixed to the housing 2. The claw 261 has a shape that is inserted into the hole 81 </ b> A of the attachment piece 81 and engages with the attachment piece 81. An engagement portion is formed in the hole 265 so as to engage with the mounting piece 82 inserted into the hole 265. Further, a claw similar to the claw 261 (hereinafter referred to as “claw of the end portion 23”) is provided on the end portion 23 (−X) near the rotation shaft 50 in the housing 2. The claw of the end 23 is provided at a position facing the attachment piece 83 of the cover 8 when the cover 8 is fixed to the housing 2. The claw of the end portion 23 has a shape that is inserted into the hole 83 </ b> A of the attachment piece 83 and engages with the attachment piece 83.

  A male screw 101 (FIG. 4) for fixing the cover 8 to the housing 2 is screwed into the female screw 25. The female screw 25 is provided at a position facing the hole 84 </ b> A of the attachment piece 84 of the cover 8 when the cover 8 is fixed to the housing 2.

  The bearings 210, 220, and 221 are members for supporting a pair of shafts (not shown) for moving the optical pickup device 100 in the radial direction (X axis). The bearing 210 is provided on one side surface 21. U-groove 21A for supporting the shaft is formed in bearing 210. The bearings 220 and 221 are provided on the other side surface 22. The bearings 220 and 221 are respectively formed with holes 22A and 22B for supporting the shaft.

=== First heat sink, second heat sink ===
Hereinafter, the 1st heat sink and the 2nd heat sink in this embodiment are demonstrated with reference to FIG. 4, FIG. FIG. 6 is a perspective view showing the housing in a state where the optical element and the first and second heat radiating plates are fixed in the present embodiment. A rotating shaft 50 of a spindle motor for rotating the optical disc 5 is indicated by a one-dot chain line for convenience of explanation.

  The first heat radiating plate 41 is a metal plate for radiating heat generated by the laser light source 11. When the first heat radiating plate 41 is fixed to the housing 2, the first heat radiating plate 41 has a shape that is curled so as to avoid the depression 231 (FIG. 5). An end portion 412 on the front side (+ X) of the first heat radiating plate 41 (FIG. 4) extends along an edge on the front side (+ X) of the housing 2 when the first heat radiating plate 41 is fixed to the housing 2. It exhibits a shape bent toward the lower side (-Z). A hole 411 through which the claw 262 is inserted is provided at a position facing the claw 262 of the housing 2 at the end 412. When the claw 262 is inserted into the hole 411 and the claw 262 and the first heat radiating plate 41 are engaged, the first heat radiating plate 41 is fixed to the housing 2.

  The second heat radiating plate 42 is a metal plate for radiating heat generated by the driver IC 61. The second heat radiating plate 42 has a shape extending along the tangential direction (Y-axis) so as to be disposed in the recess 232 of the housing 2. When the second heat radiating plate 42 is disposed in the recess 232, the second heat radiating plate 42 has a shape bent along the bottom of the recess 232.

The second heat radiation plate 42 is provided with holes 421 and 422. The holes 421 and 422 are respectively provided at positions facing the protrusion 253 and the female screw 25 when the second heat radiating plate 42 is disposed in the recess 232. The second heat radiating plate 42 is positioned with respect to the housing 2 by disposing the second heat radiating plate 42 in the recess 232 so that the protrusion 253 is inserted into the hole 421. Furthermore, the second heat sink 42 is fixed to the housing 2 by screwing the male screw 101 into the female screw 25 through the hole 422.

=== Laser light source ===
Hereinafter, the laser light source in the present embodiment will be described with reference to FIG. FIG. 7 is a perspective view showing a laser light source in the present embodiment.

  The laser light source 11 includes terminals 111 to 113, a metal plate 114, a wall body 115, a support member 116, and a housing body 117.

  The housing 117 houses the first laser diode 111 and the second laser diode 112 so that the laser light can be emitted in the −X direction. The container 117 is fixed to one (−Z) surface of the metal plate 114 via an attachment member (not shown).

  The metal plate 114 is a flat plate on which the container 117 is mounted. The metal plate 114 also functions as a heat radiating plate for radiating heat generated by the first laser diode 111 and the second laser diode 112.

  The wall body 115 is an insulating frame for protecting the housing body 117. The wall body 115 is provided on one surface of the metal plate 114 to which the housing body 117 is attached. The wall body 115 is provided so as to surround the periphery of the housing body 117 except for a part in the direction (−X) in which the laser light around the housing body 117 is emitted.

  The support member 116 is an insulating member that supports the wall body 115 so that the wall body 115 is fixed to the metal plate 114. The support member 116 is continuously formed from the + X side end of the wall 115 to the other (+ Z) surface of the metal plate 114. The support member 116 is formed integrally with the wall body 115. A part of the upper side of the laser light source 11 is raised by the thickness of the support member 116. The support member 116 and the wall 115 and the metal plate 114 are fixed using, for example, an adhesive.

  The terminals 111 to 113 protrude in the + X direction from the side (+ X) opposite to the direction in which the laser beam of the support member 116 is emitted. For example, the anode of the first laser diode 111 and the anode of the second laser diode 112 are connected to the terminals 111 and 113, respectively. For example, the cathode of the first laser diode 111 and the cathode of the second laser diode 112 are commonly connected to the terminal 112.

=== Circuit board, FPC ===
Hereinafter, the circuit board and the FPC in the present embodiment will be described with reference to FIGS. FIG. 8 is a perspective view showing the housing in a state where the circuit board is fixed in the present embodiment. A rotating shaft 50 of a spindle motor for rotating the optical disc 5 is indicated by a one-dot chain line for convenience of explanation. FIG. 9 is a diagram showing the circuit board and the FPC as viewed from the optical disk side in the present embodiment. FIG. 10 is a diagram illustrating the circuit board and the FPC as viewed from the side opposite to the optical disk side in the present embodiment.

  The circuit board 6 is, for example, a rigid board for controlling the optical pickup device 100. The circuit board 6 is attached to the housing 2 from the upper side (+ Z) of the housing 2. The circuit board 6 has a shape extending in the tangential direction (Y axis) so as to cover the depressions 231 and 232 provided in the housing 2. The length of the circuit board 6 in the tangential direction is such that the wall body 215 and the wall body 225 in the tangential direction are arranged so that the circuit board 6 is disposed between the wall bodies 215 and 225 (FIG. 5) of the housing 2. It is set shorter than the distance between.

  On the circuit board 6, a connector 66, holes 651 to 653, 655, 65, terminals 621 to 623, and a driver IC 61 are arranged.

  The holes 651 to 653 (FIG. 10) are used for positioning the circuit board 6 with respect to the housing 2. The holes 651 to 653 are respectively provided at positions facing the protrusions 251 to 253 of the housing 2 when the circuit board 6 is fixed to the housing 2.

  The hole 65 is provided at a position facing the female screw 25 when the circuit board 6 is fixed to the housing 2.

  The hole 655 is provided to prevent the support member 116 of the laser light source 11 and the circuit board 6 from interfering when the circuit board 6 is fixed to the housing 2. The hole 655 is provided at a position facing a part of the recess 231 of the housing 2. The hole 655 is provided at a position facing the support member 116 of the laser light source 11 fixed to the housing 2. The size of the hole 655 is set such that the support member 116 is disposed in the hole 655.

  Terminals 621 to 623 are terminals to which a drive current for emitting laser light from the laser light source 11 output from the driver IC 61 is supplied. The terminals 621 to 623 are electrically connected to the terminals 111 to 113 of the laser light source 11, respectively. The terminals 621 to 623 are provided on the surface (−Z) of the circuit board 6 facing the housing 2. The terminals 621 to 623 are provided at positions facing the terminals 111 to 113 of the laser light source 11 fixed to the housing 2, respectively.

  The driver IC 61 is an integrated circuit for controlling the laser light source 11. The driver IC 61 is fixed to the surface of the circuit board 6 facing the housing 2 by soldering. When the circuit board 6 is fixed to the housing 2, the second heat radiating plate 42 is formed in the recess 232 of the housing 2. It is arranged at a position where it comes into contact with. Further, the driver IC 61 is electrically connected to a control device configured by a circuit board on which a control circuit of the optical pickup device 100 of the optical disk device on which the optical pickup device 100 is mounted is formed via the connector 66. For example, the wiring of the circuit board 6 is electrically connected with solder or the like. It is assumed that the wiring of the circuit board 6 is electrically connected to the terminal of the connector 66 so as to be electrically connected to the control device of the optical pickup device 100 via the connector 66.

  The connector 66 is used to electrically connect the optical pickup device 100 and a control device (not shown) that controls the optical pickup device 100 (hereinafter referred to as “control device of the optical pickup device 100”). The connector 66 is provided on the upper (+ Z) side surface of the end portion 6A on the side (+ X) far from the rotation shaft 50 in the tracking direction (X axis). The connector 66 will be described later.

Furthermore, electronic components 191 (FIG. 9) such as a chip resistor and a capacitor are disposed on the circuit board 6.
The laser light source 11, the driver IC 61, and the electronic component 191 correspond to predetermined components.

  The front monitor diode 19 and the photodetector 13 are fixed to the FPC 7 (FIG. 4) by soldering, and the front monitor diode 19, the photodetector 13 and the control device of the optical pickup device 100 are electrically connected. The FPC 7 is fixed to one end (-Y) of the circuit board 6 by soldering. Thereby, the wiring of the FPC 7 is electrically connected to the wiring of the circuit board 6, and the front monitor diode 19 and the photodetector 13 are electrically connected to the control device of the optical pickup device 100 through the connector 66. It is assumed that the wiring of the circuit board 6 is electrically connected to the terminal of the connector 66 so as to be electrically connected to the control device of the optical pickup device 100 via the connector 66. That is, the terminal of the connector 66 is electrically connected to the output of the photodetector 13.

  The actuator 3 is electrically connected to the FPC 700. The actuator 3 is electrically connected to the wiring of the FPC 700 using, for example, solder so that the actuator 3 and the control device of the optical pickup device 100 are electrically connected. The FPC 700 is fixed to the other end (+ Y) of the circuit board 6 by soldering, and the FPC 700 is wired so that the actuator 3 is electrically connected to the control device of the optical pickup device 100 via the connector 66. Are electrically connected to the wiring of the circuit board 6. It is assumed that the wiring of the circuit board 6 is electrically connected to the terminal of the connector 66 so as to be electrically connected to the control device of the optical pickup device 100 via the connector 66.

=== Connector ===
Hereinafter, the connector according to this embodiment will be described with reference to FIGS. 8, 11, and 12.

  FIG. 11 is a diagram illustrating the connector in a state in which the lever is rotated in the present embodiment. FIG. 12 is a diagram showing a connector in the present embodiment. 11 and 12, the metal piece 664, a part of the metal piece 665, and a part of the lever 662 are invisible, but are shown by dotted lines for convenience of explanation. 11 and 12 show the cover 8, the circuit board 6, and the connector 66 as seen from the C1-C2 cross section in FIG.

  The connector 66 attaches / detaches the flexible cable 102 to / from the connector 66 by rotating a lever 662 (operation piece) provided on the side opposite to the insertion port 661 into which the flexible cable 102 (cable) is inserted. This is a back lock type connector. The fixing of the flexible cable 102 to the connector 66 will be described later. The connector 66 (FIG. 8) is disposed on the circuit board 6 in order to electrically connect the optical pickup device 100 and the control device of the optical pickup device 100. The connector 66 is provided at an end 6A on the side (+ X) far from the rotation shaft 50 on the upper (+ Z) surface of the circuit board 6. The connector 66 has a long shape extending along the tangential direction (Y axis). The connector 66 (FIG. 11) includes a case 660, a lever 662, and metal pieces 664 and 665.

  The case 660 is an insulating container for housing the metal pieces 664 and 665. The case 660 has a substantially rectangular column shape, for example. The case 660 has a distance from the upper surface of the circuit board 6 to the upper surface of the case 660 in the vertical direction (Z-axis), and a distance from the upper surface of the circuit board 6 to the upper surface of the cover 8. However, it is assumed that the height is set to a similar distance.

  The metal pieces 664 and 665 are terminals that are electrically connected to a terminal provided at the tip of the flexible cable 102. One end of the flexible cable 102 is provided with a terminal electrically connected to the terminal of the connector 66, and the other end of the flexible cable 102 is electrically connected to a control device for controlling the optical pickup device 100. It is assumed that The metal pieces 664 and 665 have a shape extending along the X axis. One end (−X) of the metal piece 665 is electrically connected to the wiring of the circuit board 6. The other end (+ X) of the metal piece 665 extends toward the insertion port 661 (+ X). One end 668 of the metal piece 664 has a shape such that the lever 662 contacts the end 663 of the lever 662 when the lever 662 rotates about the rotation shaft 667 in the A2 direction (FIG. 12). The rotation of the lever 662 will be described later. The other end of the metal piece 664 extends toward the insertion port 661 (+ X). The metal piece 664 is attached to the metal piece 665 so that the metal piece 664 can be rotated around a rotation axis 666 along the Y axis. The metal piece 664 is attached in a state of being biased by using, for example, a spring or the like (not shown) so that the metal piece 664 rotates in the B1 direction around the rotation shaft 666. Note that the metal piece 664 is electrically connected to the metal piece 665.

  The lever 662 is an insulating lever operated to rotate the metal piece 664 in the B1 direction or the B2 direction around the rotation shaft 666. The lever 662 is attached to the case 660 so that the lever 662 can rotate around a rotation shaft 667 along the Y axis. The end portion 663 of the lever 662 has a shape that abuts the end portion 668 of the metal piece 664 when the lever 662 is rotated in the A2 direction around the rotation shaft 667.

  When the lever 662 is rotated in the A1 direction (FIG. 11) around the rotation shaft 667, the end 663 of the lever 662 is separated from the end 668 of the metal piece 664. The metal piece 664 rotates in the B1 direction about the rotation shaft 666 by an inferior force such as a spring, for example. At this time, a gap is formed between the other (+ X) end of the metal piece 664 and the other end of the metal piece 665 so that the flexible cable 102 can be inserted between the metal pieces 664 and 665. Shall be. Then, the tip of the flexible cable 102 can be inserted between the metal pieces 665 and 664 through the insertion port 661. That is, when the lever 662 is rotated in the A1 direction around the rotation shaft 667, the flexible cable 102 can be attached to and detached from the connector 66.

  When the lever 662 is rotated in the A2 direction (FIG. 12) about the rotation shaft 667, the end 663 of the lever 662 contacts the end 668 of the metal piece 664 from the lower side (−Z). The end portion 668 of the metal piece 664 is pushed up from the lower side to the upper side (+ Z) by the end portion 663 of the lever 662. The metal piece 664 is rotated about the rotation shaft 666 in the B2 direction against an urging force such as a spring. At this time, the other end of the metal piece 664 is inserted so that the flexible cable 102 inserted between the metal pieces 665 and 664 is sandwiched between the other end of the metal piece 664 and the other end of the metal piece 665. The gap between this end and the other end of the metal piece 665 is relatively narrow. Further, when the flexible cable 102 is not inserted between the metal pieces 665 and 664, when the lever 662 is rotated in the A2 direction around the rotation shaft 667, the other end of the metal piece 664, Since the gap between the other end of the metal piece 665 is relatively narrow, the end of the flexible cable 102 cannot be inserted between the metal pieces 665 and 664. That is, when the lever 662 is rotated in the A2 direction around the rotation shaft 667, the flexible cable 102 cannot be attached to or detached from the connector 66.

=== Cover ===
Hereinafter, the cover in the present embodiment will be described with reference to FIG.
FIG. 13 is a perspective view showing a cover in the present embodiment.
The cover 8 is a metal lid that covers the housing 2 from the upper side (+ Z). For example, the cover 8 is formed by bending a single metal plate made of stainless steel. The cover 8 includes mounting pieces 81 to 84, a recess 860, a hole 870, contact pieces 861, 862, 871, 872, a first cutout 851, and a second cutout 852.

  The attachment pieces 81 to 84 are members for fixing the cover 8 to the housing 2. The attachment pieces 81 to 84 are provided at positions facing the claw 261, the hole 265, the claw of the end 23, and the female screw 25 of the housing 2, respectively. The mounting pieces 81 to 83 have a bent shape from the cover 8 toward the side (−Z) opposite to the optical disk 5 (FIG. 3) side. The mounting piece 84 was bent from the cover 8 toward the side opposite to the optical disk 5 side, and then bent toward the + X side so as to be parallel to the surface of the housing 2 where the female screw 25 is provided. Presents a shape. The attachment piece 81 is provided with a hole 81A. The claw 261 is inserted into the hole 81 </ b> A so that the attachment piece 81 is fixed to the claw 261. And the attachment piece 81 and the nail | claw 261 will be engaged. The attachment piece 82 has, for example, a substantially U shape so as to be inserted into the hole 265 and fixed to the housing 2. When the attachment piece 82 is inserted into the hole 265, the attachment piece 82 and the engaging portion in the hole 265 are engaged. The attachment piece 83 is provided with a hole 83A. The claw of the end portion 23 is inserted into the hole 83A so that the attachment piece 83 is fixed to the claw of the end portion 23. And the attachment piece 83 and the nail | claw of the edge part 23 will be engaged. The attachment piece 84 is provided with a hole 84A through which the male screw 101 is inserted. The attachment piece 84 is fixed to a part of the housing 2 where the female screw 25 is formed by the male screw 101.

  The hole 870 is formed at a position facing the lens holder 300 so that the objective lens 611 (FIG. 4) is exposed when the cover 8 is fixed to the housing 2.

  The contact pieces 871 and 872 are provided at positions facing the frame portions 351 and 352 of the actuator 3 when the cover 8 is fixed to the housing 2, respectively. The contact pieces 871 and 872 have a shape that is bent toward the lower side (−Z) so that the tips of the contact pieces 871 and 872 are in contact with the portions 351 and 352 of the actuator 3.

  The recess 860 is formed at a position where the second notch 852 and the hole 863 are provided on the upper surface of the cover 8. The hole 863 will be described later. A seal 881 (FIG. 16) is attached to the bottom of the recess 860 to close a part of the second notch 852 and the hole 863 from the upper side (+ Z) side. The depression 860 is depressed by the thickness of the seal 881.

  The contact pieces 861 and 862 are provided at positions facing the heat radiating gel 552 applied to the circuit board 6 when the cover 8 is fixed to the housing 2. The heat dissipating gel 552 will be described later. The contact pieces 861 and 862 have a shape that is bent downward so that the tips of the contact pieces 861 and 862 are in contact with the heat radiating gel 552. The contact pieces 861 and 862 are bent so that the tips of the contact pieces 861 and 862 face each other in the tangential direction. Therefore, a hole 863 is formed in a part of the cover 8 where the contact pieces 861 and 862 are provided.

  The first cutout 851 is provided at the + X side end of the cover 8 so that the connector 66 is exposed when the cover 8 is fixed to the housing 2. The first cutout 851 is formed at a position facing the connector 66 when the cover 8 is fixed to the housing 2. That is, the first cutout 851 is cut out so that the flexible cable 102 can be attached to and detached from the connector 66. Then, on both sides of the position where the first notch 851 of the cover 8 is provided in the tangential direction, protruding portions 891 and 892 pointed toward the + X side are formed. The first notch 851 has a shape such that parts other than the connector 66 on the circuit board 6 are covered by the cover 8. For example, the connector 66 (FIG. 3) is arranged on the line 50A where the + X side end of the connector 66 provided with the insertion port 661 connects the tip of the protruding portion 891 and the tip of the protruding portion 892. As described above, the circuit board 6 is provided. The length D4 of the first notch 851 in the tangential direction is set to be longer than the length D1 (FIG. 9) of the connector 66 in the tangential direction. Further, the length D3 of the first notch 851 in the tracking direction is set longer than the length D2 (FIG. 12) of the connector 66 in the tracking direction when the lever 662 is rotated in the A2 direction. Therefore, when the lever 662 of the connector 66 is rotated in the A1 direction or the A2 direction, the lever 662 and the cover 8 do not interfere with each other.

  The second notch 852 is provided at the end 893 on the + X side of the cover 8 that is scooped by the first notch 851. A gap 852A (FIG. 3) for operating the lever 662 is formed between the lever 662 and the cover 8 by the second notch 852. The second notch 852 is further notched from the first notch 851 at a position where the distance from the connector 66 is farther than the first notch 851. For example, the second notch 852 is provided on the −Y side from the substantial center of the end 893 so that the components on the circuit board 6 are not exposed. Then, the lever 662 can be operated from the gap 852A so that the lever 662 rotates in the A1 or A2 direction.

  Further, the first notch 851 and the second notch 852 are provided so as to avoid a position facing a predetermined part. That is, the predetermined part is covered with the cover 8 and reliably protected.

=== Assembling the optical pickup device ===
Hereinafter, the assembly of the optical pickup device according to the present embodiment will be described with reference to FIGS. 4, 6, 8, and 14 to 16. FIG. 14 is a perspective view showing the housing to which the optical element is fixed, as viewed from the side opposite to the side facing the optical disc in the present embodiment. FIG. 15 is a perspective view showing the first and second heat radiating plates and the circuit board in the present embodiment. FIG. 16 is a perspective view showing the optical pickup device with the flexible cable attached in the present embodiment.

  The optical element of the optical pickup device 100 is placed on the housing 2 (FIG. 6). That is, the first optical component and the second optical component are placed. The optical element of the optical pickup device 100 is fixed to the housing 2 using, for example, an adhesive. The laser light source 11 is fixed to the housing 2 by an adhesive applied to the grooves 255 to 258.

  The first heat radiating plate 41 and the second heat radiating plate 42 are positioned with respect to the housing 2. The first heat radiating plate 41 is fixed to the housing 2 by inserting the claw 262 into the hole 411 and engaging the claw 262 with the first heat radiating plate 41.

  A circuit board 6 (FIG. 8) is positioned with respect to the housing 2. Further, the circuit board 6 is fixed (temporarily fixed) to the housing 2 by the claws 263 and 264 of the housing 2. That is, the circuit board 6 and the connector 66 are placed on the housing 2. Here, since the hole 655 is formed in the circuit board 6, the circuit board 6 is fixed to the housing 2 without interference between the circuit board 6 and the support member 116 (FIG. 7) of the laser light source 11. The Rukoto. Thereafter, the FPCs 7 and 700 are fixed to the circuit board 6. The terminals 111 to 113 of the laser light source 11 are electrically connected to the terminals 621 to 623 of the circuit board 6 from the back side (-Z) of the housing 2 (FIG. 14) through the hole 25A, for example, using solder or the like. Is done. Further, the terminals 111 to 113 (FIG. 15) are connected to the first heat radiating plate 41 via, for example, a heat radiating gel 553. The heat dissipation gel 553 is an insulating gel that prevents the terminals 111 to 113 and the first heat dissipation plate 41 from being electrically connected. Further, the heat radiating gel 553 is a gel having a relatively high thermal conductivity such that heat generated by the laser light source 11 is transmitted to the first heat radiating plate 41 through the heat radiating gel 553. Further, heat radiation gels 551 and 552 similar to the heat radiation gel 553 are applied to the upper surface (FIG. 8) of the circuit board 6. For example, the heat radiating gel 551 is applied so as to come into contact with the cover 8 when the cover 8 is fixed to the housing 2. The heat dissipating gel 552 is applied at a position facing the opening 863 so that the tips of the contact pieces 861 and 862 (FIG. 13) come into contact when the cover 8 is fixed to the housing 2.

  The actuator 3 is placed on the housing 2 (FIG. 4). The actuator 3 is fixed to the housing 2 using, for example, an adhesive.

  A cover 8 is fixed to the housing 2. For example, the attachment pieces 81 to 83 of the cover 8 are engaged with the housing 2. That is, the housing 2 on which the first optical component, the second optical component, the connector 66, and the circuit board 6 are placed is covered with the cover 8. Further, the circuit board 6 is sandwiched between the housing 2 and the cover 8. Thereafter, the male screw 101 is screwed into the female screw 25 of the housing 2 through the hole 84 </ b> A of the cover 8, the hole 65 of the circuit board 6, and the hole 422 of the second heat radiating plate 42. The optical element of the optical pickup device 100, the actuator 3, the first heat radiating plate 41, the second heat radiating plate 42, the circuit board 6, the FPCs 7 and 700, and the cover 8 are fixed to the housing 2.

  A seal 881 (FIG. 16) is formed in advance on the upper surface (+ Z) of the cover 8, for example, on the back surface of the seal 881 so as to close the hole 863 (FIG. 13) and the second notch 852 of the cover 8. Affixed with an agent layer or the like. Then, the second notch 852 is blocked by the seal 881, and the lever 662 cannot be operated, and the optical pickup device 100 is assembled.

=== Attaching / detaching flexible cable ===
Hereinafter, with reference to FIGS. 3, 11, and 12, attachment / detachment of the flexible cable 102 to / from the connector 66 in this embodiment will be described.
For example, the case where the flexible cable 102 is fixed to the connector 66 and the case where the flexible cable 102 is removed from the connector 66 will be described separately.

<When Flexible Cable 102 is Fixed to Connector 66>
The lever 662 is operated from the gap 852A (FIG. 3) between the connector 66 and the cover 8 so that the lever 662 rotates about the rotation shaft 667 in the A1 direction (FIG. 11). At this time, the flexible cable 102 can be attached to and detached from the connector 66 as described above. The distal end of the flexible cable 102 is inserted between the metal pieces 664 and 665 from the insertion port 661. Thereafter, the lever 662 is operated from the gap 852A so that the lever 662 rotates about the rotation shaft 667 in the A2 direction (FIG. 12). At this time, as described above, the tip of the flexible cable 102 is sandwiched between the metal pieces 664 and 665 and fixed to the connector 66.

<When Flexible Cable 102 is Removed from Connector 66>
The lever 662 is operated from the gap 852A so that the lever 662 rotates about the rotation shaft 667 in the A1 direction (FIG. 11). At this time, the flexible cable 102 can be attached to and detached from the connector 66 as described above. The flexible cable 102 is removed from the connector 66.

  As described above, the first optical component including the laser light source 11 guides the laser light emitted from the laser light source 11 to the signal recording surface of the optical disc 5. The second optical component including the light detector 13 guides the reflected light of the laser light reflected from the signal recording surface of the optical disk 5 to the light detector 13. The connector 66 is electrically connected to the output of the photodetector 13. A connector 66 is disposed on the circuit board 6. A first optical component, a second optical component, a connector 66, and a circuit board 6 are placed on the housing 2. The cover 8 covers the housing 2 on which the first optical component, the second optical component, the connector 66, and the circuit board 6 are placed. The connector 66 has a lever 662 that is operated when the flexible cable 102 is attached to or detached from the connector 66. The cover 8 is provided with a first notch 851 and a second notch 852 that expose the connector 66 so that the lever 66 can be operated. Therefore, the flexible cable 102 can be attached to and detached from the connector 66 without removing the cover 8 from the housing 2. Therefore, the optical pickup device 100 that is easy to use can be provided. Further, by attaching the flexible cable 102 to the connector 66, the output of the photodetector 13 and the control device of the optical pickup device 100 connected to the flexible cable 102 are electrically connected. Therefore, it is possible to provide the optical pickup device 100 with high versatility.

  The first cutout 851 is cut out so that the flexible cable 102 can be attached to and detached from the connector 66. The second notch 852 is further notched from the first notch 851 at a position where the distance from the connector 66 is farther than the first notch 851. Therefore, the first cutout 851 has a function of enabling the operation of the lever 662 and a function of enabling the flexible cable 102 to be attached to and detached from the connector 66. For example, the flexible cable 102 can be easily attached to and detached from the connector 66 by providing the second notch 851 at a position where the operability of the lever 662 is improved. Therefore, the usability of the optical pickup device 100 can be improved.

  In addition, predetermined components are arranged on the circuit board 6. The 1st notch 851 and the 2nd notch 852 are provided so that the position which opposes a predetermined component may be avoided. Therefore, the predetermined component arranged on the circuit board 6 is surely protected by the cover 8. Therefore, for example, it is possible to prevent the optical pickup device 100 from being damaged due to contact of a predetermined component arranged on the circuit board 6 with a component outside the optical pickup device 100. That is, a highly durable optical pickup device 100 can be provided. In addition, since the predetermined component arranged on the circuit board 6 is covered with the metal cover 8, for example, when the ESD test based on the electrical stress due to static electricity is performed, the predetermined component is destroyed. Can be prevented.

  The circuit board 6 is a rigid board sandwiched between the housing 2 and the cover 8. The connector 66 is disposed at the end 6A of the circuit board 6 on the side far from the rotation shaft 50 in the tracking direction. Therefore, for example, the flexible cable 102 can be easily attached to and detached from the connector 66 without interfering with the spindle motor or the like on the rotating shaft 50 side. Therefore, the usability of the optical pickup device 100 can be further improved.

  The seal 881 is attached to the cover 8 so as to cover the second notch 852 when the flexible cable 102 is attached to the connector 66. Therefore, for example, dust can be prevented from entering the housing 2 through the second notch 852. Therefore, it is possible to prevent the optical pickup device 100 from being damaged by the dust. Therefore, it is possible to provide the optical pickup device 100 with high durability.

  The present embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

2 Housing 3 Actuator 5 Optical disk 6 Circuit board 7, 700 FPC
8 Cover 11 Laser light source 12 Diffraction grating 13 Photo detector 14 Detection lens 15 Beam splitter 16 1/4 wavelength plate 17 Collimating lens 18 Rising mirror 19 Front monitor diode 50 Rotating shaft 61 Driver IC
66 connector 100 optical pickup device 102 flexible cable 191 electronic component 300 lens holder 611 objective lens 660 case 661 insertion slot 662 lever 851 first notch 852 second notches 861, 862, 871, 872 contact piece 881 seal

Claims (5)

A first optical component that includes a laser diode and guides laser light emitted from the laser diode to a signal recording surface of an optical disc;
A second optical component that includes a photodetector and guides the reflected light of the laser beam reflected from the signal recording surface of the optical disc to the photodetector;
A connector electrically connected to the output of the photodetector;
A circuit board on which the connector is disposed;
A housing on which the first optical component, the second optical component, the connector, and the circuit board are placed;
A cover for covering the housing on which the first optical component, the second optical component, the connector, and the circuit board are placed;
With
The connector has an operation piece that is operated when a cable is attached to and detached from the connector.
The optical pickup apparatus, wherein the cover has a notch that exposes the connector so that the operation piece can be operated. The notch is
A first notch that is notched so that the cable is detachable from the connector;
2. The second notch further cut away from the first notch at a position away from the first notch at a distance from the connector. 2. The optical pickup device described. The circuit board is further arranged with a predetermined component of the first optical component and the second optical component,
The optical pickup device according to claim 2, wherein the first cutout and the second cutout are provided so as to avoid a position facing the predetermined component. The circuit board is a rigid board sandwiched between the housing and the cover,
The optical pickup device according to claim 3, wherein the connector is disposed at an end of the circuit board on a side far from a rotation axis for rotating the optical disc in the tracking direction of the optical disc. The optical pickup device according to claim 4, further comprising a seal attached to the cover so as to cover the second notch when the cable is attached to the connector.

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