JP2007250109A - Optical disk device, tape type lens cleaner, and method for controlling optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique capable of cleaning an objective lens regardless of whether a recording medium exists inside an optical disk device or not. <P>SOLUTION: The cleaning tape 33 of a lens cleaning mechanism 30 includes holes 33a and an optical disk is irradiated with a laser beam from the objective lens 3 via the holes 33a. Accordingly, a mechanism for moving the objective lens 3 or a mechanism for moving the lens cleaning mechanism 30 itself is not required. That is, the laser beam is radiated from the objective lens 3 via the holes 33a when a signal is recorded or reproduced, and the cleaning tape 33 is transferred so as to allow a cleaning area 33b to contact the objective lens 3 when cleaning is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  An optical disc apparatus that performs at least one of recording a signal on a disc-shaped recording medium using light and reproducing the recorded signal, a tape-type cleaning device mounted on the optical disc apparatus, and control of the optical disc apparatus Regarding the method.

2. Description of the Related Art Conventionally, there is a tape-type lens cleaning machine that cleans an optical head lens of an optical disk device (for example, see Patent Document 1). The apparatus described in Patent Document 1 includes a pad (a pad wetting unit and a pad drying unit) that presses the cleaning tape against the optical head lens. The cleaning liquid is supplied from the tank to the pad wetting unit, and the optical head lens is cleaned by pressing the pad wetting unit against the optical head lens while rotating. Furthermore, the cleaning liquid and dust are removed by pressing the pad drying unit against the optical head lens while rotating.
JP-A-4-214240 (paragraph [0005], FIG. 1)

  However, the lens cleaning machine described in Patent Document 1 is considered to be a type of device that cleans by contacting the optical head lens when there is no optical disk in the optical disk device. If you try to clean the optical disk in the optical disk device, the lens cleaner moves in the optical disk device or the optical head lens cleans the lens until the pat of the lens cleaner contacts the optical head lens. The optical disk device must have a structure such as moving to a certain position.

  If the lens cleaner is a device that is removable with respect to the optical disk device, the lens cleaner need only be moved within the optical disk device, so there is no need to move the optical head lens. However, in that case, it is troublesome for an operator (or a user) to load or install the lens cleaner on the optical disk device each time cleaning is performed.

  In view of the circumstances as described above, an object of the present invention is to provide a tape-type lens cleaning device that can be cleaned regardless of whether the recording medium is in the optical disk device, an optical disk device having the tape-type lens cleaning device, and its An object of the present invention is to provide a method for controlling an optical disk device.

  In order to achieve the above object, an optical disc apparatus according to the present invention has a holding mechanism for holding a disc-shaped recording medium capable of recording signals, and an objective lens for collecting light on the recording medium held by the holding mechanism. And an optical pickup for recording or reproducing the signal, a cleaning tape having a hole and cleaning the objective lens in contact with the objective lens, and the objective through the hole at the time of recording or reproducing the signal. A lens cleaning mechanism having a tape transfer mechanism capable of disposing the cleaning tape with respect to the objective lens so that the lens and the recording medium face each other;

  In the present invention, since the cleaning tape has a hole and light is irradiated from the objective lens to the recording medium through the hole, a mechanism for moving the objective lens or a mechanism for moving the lens cleaning mechanism itself is not necessary. . That is, at the time of recording or reproduction, light is irradiated from the objective lens to the recording medium through the hole, and at the time of cleaning, the cleaning tape is transferred by the tape transfer mechanism to bring the cleaning tape into contact with the objective lens. Thus, it is possible to perform cleaning at the position where the objective lens is recorded or reproduced, regardless of whether or not the recording medium is in the optical disk apparatus. Further, for example, there is no need to take out the recording medium every time cleaning is performed, and the cleaning work becomes easy.

  In the present invention, a plurality of the holes are arranged in the transfer direction of the cleaning tape. As a result, when the cleaning tape is transferred, the cleaning area of the cleaning tape can be changed and cleaning can be performed many times, and the lens cleaning mechanism can be used over a long period of time.

  In the present invention, the optical disc apparatus further includes a sled mechanism that moves the holding mechanism in the radial direction of the recording medium when the signal is recorded or reproduced. The present invention is particularly effective in the case of a mechanism in which the recording medium and the holding mechanism move rather than the configuration in which the objective lens moves. This is because in the case of an optical disk device in which the objective lens is threaded, it is necessary to move the objective lens and the lens cleaning mechanism integrally so that the position of the hole does not shift with respect to the objective lens during cleaning.

  In the present invention, the lens cleaning mechanism includes a guide member that guides the transfer of the cleaning tape. Thereby, the cleaning tape can be smoothly transferred.

  In the present invention, the guide member is provided between the two slits through which the cleaning tape passes and the two slits so as to be closed by the cleaning tape passing through the two slits, And an opening that is exposed to the medium. Thereby, the cleaning tape passes through the opening, and the objective lens can come into contact with the cleaning tape.

  In the present invention, the optical pickup includes an actuator that moves the objective lens, and the guide member is mounted on the actuator. As a result, the cleaning tape is not displaced with respect to the objective lens.

  In the present invention, the optical pickup includes an actuator that moves the objective lens, and the optical disc apparatus further includes a control unit that controls the operation of the actuator during cleaning by the lens cleaning mechanism. In the present invention, by controlling the operation of the actuator, the objective lens is moved and cleaned. Thus, cleaning can be realized with a simpler configuration than cleaning by, for example, cleaning tape being reciprocated in the transfer direction.

  In the present invention, the control means causes the objective lens and the cleaning tape to contact each other by causing the actuator to generate a force in a focusing direction by a focusing servo by the actuator. Thereby, the force which presses an objective lens to a cleaning tape can be generated with a simple configuration.

  In the present invention, the control means causes the objective lens and the cleaning tape to move relatively by causing the actuator to generate a force in the tracking direction by tracking servo on the objective lens. Thereby, the objective lens and the cleaning tape can be relatively moved and rubbed together. At this time, it is preferable that the cleaning is performed while the cleaning tape is transferred by a tape transfer mechanism, for example.

  In the present invention, the optical pickup includes a light source and the objective lens mounted on one side, and is configured to take light from the light source from a side opposite to the one side and guide the light to the objective lens. An actuator for moving the lens, and the tape transport mechanism transports the cleaning tape supplied from the reel on the one side, and a reel that the cleaning tape can supply. A folding roller that is folded and transferred on the opposite side and returned to the reel, and the cleaning tape has, as the hole, a first hole for facing the objective lens and the recording medium; A second hole that faces the first hole and allows light from the light source to pass through. Thereby, since the light emitted from the light source is not blocked by the cleaning tape, recording or reproduction is possible.

  In the present invention, the objective lens has a numerical aperture that exceeds 0.85 and is focused on the recording medium as near-field light. As described above, when the numerical aperture of the objective lens is high, recording or reproduction processing becomes impossible unless the objective lens is always kept clean. Even in view of such a viewpoint, the present invention is very advantageous because it can be frequently cleaned even if there is a recording medium in the optical disk apparatus.

  The tape-type lens cleaning device according to the present invention is a tape-type lens cleaning device for cleaning an objective lens that collects light on a disc-shaped recording medium capable of recording a signal, and has a hole and is in contact with the objective lens. A cleaning tape for cleaning the objective lens, and the cleaning tape is arranged with respect to the objective lens so that the objective lens and the recording medium face each other through the hole when the signal is recorded or reproduced. And a tape transport mechanism that can be operated.

  A method of controlling an optical disk device according to the present invention is a method of controlling an optical disk device including an objective lens that collects light on a disk-shaped recording medium capable of recording a signal, and a cleaning tape having a hole is formed in the objective lens. Cleaning the objective lens by bringing it into contact, disposing the cleaning tape relative to the objective lens so that the objective lens and the recording medium face each other through the hole; and And recording or reproducing the signal in a state where the objective lens and the recording medium face each other.

  As described above, according to the present invention, cleaning can be performed regardless of whether or not the recording medium is in the optical disc apparatus. Further, it is not necessary to take out the recording medium every time cleaning is performed, and the cleaning work becomes easy.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an optical disc apparatus according to an embodiment of the present invention.

  The optical disc apparatus 100 includes a disc clamper 19, a spindle motor 8, an optical pickup 6, a preamplifier 9, a biaxial actuator 7, and a servo control unit 17.

  The disc clamper 19 holds a disc-shaped recording medium (hereinafter referred to as “optical disc”) 2 such as a DVD ± R / RW, CD-R / RW, or BD (Blu-ray Disc (registered trademark)). It is. In addition to the above, the optical disk may be a medium recorded by near-field light. The spindle motor 8 rotates the optical disk 2 held by the disk clamper 19. The optical pickup 6 includes a laser light source 5, an objective lens 3 that condenses the laser light emitted from the laser light source 5 onto the optical disk 2, a photodetector (PD) 4 that detects reflected return light from the optical disk 2, and the like.

  As the laser light source 5, for example, a solid laser, particularly a laser diode (LD) is used, but is not limited thereto. For example, a laser light source that emits laser light having a wavelength of about 400 nm is used, but the design can be changed as appropriate according to the type of the optical disc 2.

  In addition, the optical pickup 6 has an optical system (not shown) for guiding the laser light emitted from the laser light source 5 to the objective lens 3. The preamplifier 9 generates a focusing error signal, a tracking error signal, an RF signal, and the like based on various signals output from the PD 4 of the optical pickup 6. The biaxial actuator 7 moves the part of the objective lens 3 of the optical pickup 6 in the tracking direction and the focusing direction. The servo control unit 17 outputs various servo signals to the biaxial actuator 7 and the spindle motor 8 based on the focusing error signal, tracking error signal, and RF signal.

  The optical disc apparatus 100 also includes a sled mechanism 20 that moves the optical disc 2 held by the disc clamper 19 in the radial direction of the optical disc 2 during signal recording or reproduction. Specifically, the sled mechanism 20 has a sled motor 21, and the spindle motor 8 is moved by driving the sled motor, thereby moving the optical disc 2. The servo control unit 17 also outputs a servo signal to the spindle motor 8.

  An optical disc apparatus 100 includes a system controller 15, a laser control unit 16, a synchronization detection & A / D converter 10, a signal modulator / demodulator & ECC (Error Correction Code) unit 11, a buffer memory 12, a video / audio processing unit 13, and a D / A converter. 14. An interface 18 is provided.

  The system controller 15 inputs and outputs various signals and controls the entire optical disc apparatus 100 in an integrated manner. The laser control unit 16 receives the modulation signal 42 from the signal modulator / demodulator & ECC unit 11, modulates the laser power of the laser light source 5 in order to write a signal to the optical disc 2, and controls the laser power based on the RF signal. To do. The synchronization detection & A / D converter 10 further generates a clock based on the synchronization signal recorded at a predetermined interval on the optical disc 2 and converts the analog signal into a digital signal. The signal modulator / demodulator & ECC unit 11 performs signal modulation, demodulation, ECC addition, and error correction processing based on ECC. The buffer memory 12 temporarily stores data when processed by the signal modulator / demodulator & ECC unit 11. The video / audio processing unit 13 performs necessary video processing and audio processing, and outputs video and audio in analog form via the D / A converter 14. The interface 18 is an interface for connecting an external computer, a video / audio source, and the like (not shown).

  FIG. 2 is a perspective view showing the biaxial actuator 7. The biaxial actuator 7 may have a general configuration. For example, in the biaxial actuator 7, a wire support 79 that supports the wire 78 is placed on and fixed to the base member 75. A tracking coil 81 and a focusing coil 82 are wound in a predetermined direction and mounted on a bobbin 74, and an objective lens holder 73 that holds the objective lens 3 is mounted on the bobbin 74. The bobbin 74 is supported by the wire 78 and is movable in the tracking direction (Y-axis direction) and the focusing direction (gap direction) (Z direction). Magnets 77 and 77 are disposed at the front end and substantially the center of the base member 75, respectively, and these magnets 77 generate a magnetic field. The base member 75 is made of, for example, a magnetic material, and includes two attachment portions 75a to which the magnets 77 are attached, and two piece portions 75b that are erected so as to be inserted into holes 74a provided in the bobbin 74. Have. That is, the attachment portion 75 a and the piece portion 75 b are also made of a magnetic material, and the magnetic circuit is configured by these and the magnet 77. According to such a configuration of the biaxial actuator 7, the objective lens 3 can be positioned at a predetermined address on the signal recording surface of the optical disc 2 by applying a current to each of the coils 81 and 82. Become.

  Instead of the biaxial actuator 7, a triaxial actuator equipped with a tilt actuator for controlling the tilt between the objective lens 3 and the recording surface of the optical disc 2 may be used.

  FIG. 3 is a perspective view showing the objective lens 3. FIG. 4 is a side view showing the outer shape of the objective lens 3. The objective lens 3 is, for example, a SIL (Solid Immersion Lens) and has a shape of a part of a sphere having a radius of 0.4 to 0.5 mm, specifically about 0.45 mm, and the upper portion of the objective lens 3 is conical. It becomes. The apex of the cone is a small plane of, for example, several tens of μm, specifically about 40 μm, and this is the end surface 3 a of the objective lens 3 that faces the signal recording surface of the optical disc 2. The size of the objective lens 3 is not limited to the above numerical values.

  FIG. 5 is an enlarged plan view showing the end surface 3 a of the objective lens 3. In the optical disc apparatus 100 using near-field light, a signal is recorded or reproduced in a state where the distance (gap) between the end surface 3a and the signal recording surface of the optical disc 2 is several tens of nanometers.

  As the numerical aperture (NA) of the objective lens, a numerical aperture corresponding to the wavelength of the laser light emitted from the used laser light source 5 is adopted. For example, when the recording medium is a BD, NA is 0.85. . In the case of an optical disc recorded by near-field light, the NA is 0.85 or more, specifically about 1.8.

  The optical disc apparatus 100 includes a lens cleaning mechanism 30 that cleans the objective lens 3. FIG. 6 is a schematic view showing the lens cleaning mechanism 30, and FIG. 7 is a perspective view showing a main part of the lens cleaning mechanism 30. The lens cleaning mechanism 30 includes a cleaning tape 33, a supply reel 31 that supplies the cleaning tape 33 by rotating, a recovery reel 32 that recovers the cleaning tape 33 by rotating, and a guide member that guides the cleaning tape to be transferred. 35. The supply reel 31 or the collection reel 32 is connected to a motor (not shown) for rotating them. The lens cleaning mechanism 30 includes an appropriate tension roller 34 for applying tension to the cleaning tape. Note that the tension roller 34 is not necessarily required, or is not limited to two as shown in FIG. 6, but may be one, or may be three or more. The supply reel 31, the recovery reel 32, etc. constitute a tape transfer mechanism.

  FIG. 8 is a perspective view showing the cleaning tape 33. Thus, the cleaning tape 33 has a plurality of holes 33a in the transfer direction. As shown in FIG. 9, the hole 33 a is sized so that the objective lens 3 is exposed through the hole 33 a and the laser light is collected on the optical disc 2.

  FIG. 10 is an enlarged sectional view showing the guide member 35. The guide member 35 is mounted on the biaxial actuator 7 and is formed in a cover shape that covers the biaxial actuator 7. The guide member 35 has two slits 36 on both side surfaces, and the cleaning tape 33 passes through the slits 36. An upper surface 37 provided between both side surfaces of the guide member 35 is provided with an opening 37a, and a guide portion 38 that guides the cleaning tape 33 passing through the slit below the upper surface 37 so as to be supported from below. Is provided. The guide portion 38 is provided with an internal opening 38a that faces the opening 37a. The cleaning tape 33 passed through the slit 36 is transferred so as to close the opening 37a and the internal opening 38a, and when the position of the hole 33a of the cleaning tape 33 coincides with the position of the opening 37a and the internal opening 38a, the opening 37a. The objective lens 3 is exposed to the optical disc 2 through the internal opening 38a and the hole 33a. A member denoted by reference numeral 40 is a support member that supports the biaxial actuator 7.

  The size of the opening 37 a is formed larger than the size of the hole 33 a of the cleaning tape 33. The size of the internal opening 38a is smaller than the hole 33a. However, the relationship among the sizes of the opening 37a, the internal opening 38a, and the hole 33a is not limited to such a relationship. In short, the objective lens 3 may be exposed to the optical disc 2 through the openings 37a, 38a and the hole 33a when the position of the hole 33a of the cleaning tape 33 coincides with the position of the opening 37a and the internal opening 38a. Needless to say, the shapes of the holes 33a and the openings 37a and 38a are not limited to the illustrated shapes.

  Next, the operation of the lens cleaning mechanism 30 configured as described above will be described. FIG. 11 is a flowchart showing the operation. 12 and 13 are diagrams for explaining the operation. In the present embodiment, a mode in which the optical disc 2 is loaded in the optical disc apparatus 100 and cleaned while a signal is recorded or reproduced will be described.

  In step 1101, it is assumed that a signal is recorded or reproduced. In this state, as shown in FIG. 7 and FIG. 12A, the lens cleaning mechanism 30 has the holes 33a-1 of the cleaning tape 33 aligned with the positions of the openings 37a and 38a, and the holes 33a, 37a and The objective lens 3 is exposed to the optical disc 2 from 38a. Next, when there is a cleaning command from the system controller 15 (step 1102), the optical pickup 6 interrupts signal recording or reproduction (step 1103). When the recording or reproduction is interrupted, the supply reel 31 and the like rotate by a predetermined angle, so that the region (cleaning region) 33b other than the hole 33a of the cleaning tape 33 becomes the objective lens as shown in FIG. The cleaning tape 33 is transferred until it faces 3 (step 1104). When the cleaning tape 33 is transferred, a driving force in the focusing direction is applied so that the objective lens 3 approaches the optical disc 2 by driving the biaxial actuator 7 based on the control signal of the servo control unit 17. Accordingly, as shown in FIG. 12C, the objective lens 3 comes into contact with the cleaning region 33b of the cleaning tape 33 (step 1105). FIG. 14 is a perspective view showing a state when the objective lens 3 comes into contact with the cleaning region 33b.

  Prior to step 1105, the objective lens 3 does not necessarily have to be separated from the cleaning region 33b, and the objective lens 3 may be in light contact with the cleaning region 33b. In this case, when a driving force in the focusing direction is applied to the objective lens 3 in step 1105, the pressing force of the objective lens 3 against the cleaning region 33b further increases.

  When the objective lens 3 comes into contact with the cleaning region 33b, the objective lens 3 is driven in the tracking direction while the driving force in the focusing direction is applied by the driving of the biaxial actuator 7 based on the control signal of the servo control unit 17. Is added. Thereby, the end surface 3a (see FIGS. 3 to 5) of the objective lens 3 is rubbed against the cleaning region 33b and cleaned (step 1106). In this case, as shown in FIG. 13, it is preferable that the objective lens 3 is reciprocated in the Y direction which is the tracking direction while the cleaning tape 33 is transferred in the X direction. As a result, the center of the objective lens 3 follows a locus as shown in FIG.

  In this way, cleaning is achieved with a simple configuration by cleaning at least the objective lens 3 by moving in the focusing direction and the tracking direction.

  The cleaning time can be set as appropriate. For example, since the time during which the cleaning region 33b is in contact with the objective lens 3 varies according to the transfer speed of the cleaning tape 33, the cleaning time also varies. Alternatively, the cleaning tape 33 is not only transferred in a certain direction, but is also reciprocated in the X direction so that the cleaning region 33b is in contact with the objective lens 3 for a predetermined time. It may be controlled as follows.

  Note that steps 1105 and 1106 may be performed in reverse order or simultaneously.

  During the cleaning, the cleaning tape 33 is transferred, and the driving force in the focusing direction and the tracking direction by the biaxial actuator 7 is released before the next hole 33a-2 moves onto the objective lens 3. As a result, the objective lens 3 and the cleaning tape 33 are separated from each other, and the cleaning is completed (step 1107).

  After the cleaning is completed, the cleaning tape 33 is continuously transferred to the recovery reel 32 and when the objective lens 3 is exposed from the next hole 33a-2 and the openings 37a and 38a, the cleaning tape is stopped from being transferred ( Step 1108). Specifically, the transfer of the cleaning tape may be stopped when the center of the hole 33a-2 substantially coincides with the optical axis of the objective lens 3. Thereafter, signal recording or reproduction is resumed (step 1109).

  As described above, in the lens cleaning mechanism 30 according to the present embodiment, the cleaning tape 33 has the hole 33a, and laser light is irradiated from the objective lens 3 to the optical disc 2 through the hole 33a. This eliminates the need for a mechanism for moving the objective lens 3 or a mechanism for moving the lens cleaning mechanism 30 itself. That is, at the time of signal recording or reproduction, laser light is irradiated from the objective lens 3 through the hole 33a, and at the time of cleaning, the cleaning tape 33 is transferred and the cleaning region 33b comes into contact with the objective lens 3. Thereby, whether or not the optical disk 2 is in the optical disk apparatus 100, the cleaning can be executed at the position where the objective lens 3 is recorded or reproduced.

  Further, for example, there is no need to take out the optical disk 2 every time cleaning is performed, and the cleaning work becomes easy. Thereby, the cleaning time is also shortened.

  Since the cleaning tape 33 has a plurality of holes arranged in the transfer direction, the cleaning area 33b can be changed by transferring the cleaning tape 33, and the cleaning can be repeated many times. Can be used. In addition, since cleaning can always be performed in a new cleaning area, re-contamination of the objective lens 3 due to dust adhering to the cleaning tape can be prevented.

  A form in which the cleaning tape 33 or the lens cleaning mechanism 30 is replaceable is also conceivable.

  In the present embodiment, since the transfer of the cleaning tape 33 is guided by the guide member 35, the transfer of the cleaning tape 33 becomes smooth and can be reliably cleaned. In particular, the cleaning tape 33 is passed through two slits 36 so that the objective lens 3 is pressed by the driving force in the focusing direction by the biaxial actuator 7. As a result, the objective lens 3 and the cleaning region 33b come into contact with each other with a sufficient force and can be reliably cleaned. Moreover, since the objective lens 3 can be exposed by providing the opening 37a and the like, it does not hinder signal recording or reproduction.

  In the present embodiment, since the guide member 35 is mounted on the biaxial actuator 7, the cleaning tape 33 is not displaced with respect to the objective lens 3.

  In the present embodiment, in particular, since the objective lens 3 has a numerical aperture (about 1.8) until it exceeds 0.85 and is condensed on the optical disc 2 as near-field light, the objective lens 3 is always clean. If it is not maintained, recording or reproduction processing becomes impossible. Therefore, even if the optical disc 2 is in the optical disc apparatus 100, it can be frequently cleaned, which is very advantageous.

  FIG. 15A is an enlarged photograph of the end surface 3a of the objective lens 3 before cleaning. In FIG. 15A, black granular dust adheres. FIG. 15B is an enlarged photograph of the end surface 3a of the objective lens 3 after being cleaned by the lens cleaning mechanism 30 according to the present embodiment. Comparing the two shows that the dust has been removed.

  FIG. 16 is a perspective view showing a main part of a lens cleaning mechanism according to another embodiment of the present invention.

  The lens cleaning mechanism 50 according to the present embodiment includes a folding roller 39 for folding the cleaning tape 33 supplied from the supply reel 31 and returning it to the collection reel 32. The cleaning tape 33 folded back by the roller 39 is configured to pass through a lower portion opposite to the biaxial actuator 7. An optical path (hole) (not shown) for guiding laser light supplied from an optical system (not shown) is provided in a support member 40 provided below the biaxial actuator. An optical path (hole) (not shown) is also formed in the base member 75 (see FIG. 2) of the biaxial actuator 7 so that the laser light is guided to the objective lens 3.

  Therefore, in the lens cleaning mechanism 50, the hole 33a-4 provided in the cleaning tape 33 folded back by the roller 39 is positioned so as not to block the laser beam during signal recording or reproduction. That is, the pitch of the holes 33a is such that the holes 33a-3 provided in the cleaning tape 33 positioned on the objective lens 3 and the holes 33a-4 face each other with the biaxial actuator 7 interposed therebetween during recording or reproduction. Is set. In FIG. 16, the vertical one-dot chain line A is the optical axis.

  The optical axis A does not have to be a straight line and may be broken in the middle. Anyway, it is sufficient that the cleaning tape 33 does not block the laser beam. Further, the supply reel 31 and the collection reel 32 may be the same one reel.

  The optical disc device 100 and the lens cleaning mechanism 30 or 50 described above can be applied to an optical disc device as described below, for example.

  FIG. 17 is a perspective view showing an optical disc apparatus according to an embodiment of the present invention. FIG. 18 is a perspective view showing the internal structure of the optical disc apparatus 100 shown in FIG. In FIG. 18, the electric circuit board, wiring, and other mechanisms not related to the present invention are not shown.

  As shown in FIG. 17, the optical disc apparatus 100 includes a housing 55 and a recording / reproducing unit 65 arranged in the housing 55. As shown in FIG. 18, the housing 55 is configured such that a front panel 52 and a back panel 53 are erected on a base plate 51 provided at the bottom, and the interior is covered by an external cover 54. A disk tray 92 on which an optical disk is mounted protrudes from the front panel 52. That is, the disc tray 92 can transport the optical disc 2 between a position where the recording is performed by the biaxial actuator 7 in the housing 55 and a location where the user outside the housing 55 can exchange the optical disc 2. It is provided as follows.

  The front panel 52 of the housing 55 is provided with an opening 59 for inserting / removing the disc tray 92. The opening 59 rotates in a range of about 90 degrees in conjunction with the insertion / removal of the disc tray 92. Is opened / closed by. In FIG. 18, the disk tray 92 is not shown. A tray panel 108 having an opening 108 a through which the disc tray 92 is inserted and removed is disposed so as to face the opening 59 of the front panel 52.

  As shown in FIG. 17, for example, a type of disk accommodated in a disk cartridge 99 is used as the optical disk 2. In FIG. 18, the cartridge 99 is not shown, and only the optical disk 2 is shown. However, the disk cartridge 99 is not necessarily required and may be a bare type.

  On the surface of the disc tray 92, a disc mounting recess 92a that conforms to the outer shape of the cartridge 99 is formed. The disc tray 92 is set with the optical disc 2 in the disc mounting recess 92a so that its signal recording surface E faces downward. It is conveyed in the state where it was done.

  The recording / reproducing unit 65 includes the disk clamper 19, the spindle motor 8, and the optical pickup 6. The optical pickup 6 includes a biaxial actuator 7 and an optical system 1 on which a light source 5, a photodetector 4, a lens system, and the like are mounted. The optical system 1 is covered with a cover member 69, and detailed illustration is omitted here. The spindle motor 8 is held by, for example, a motor holder 117. The disk clamper 19 holds the optical disk 2 by, for example, holding the periphery of the center hole of the optical disk 2 with a magnet or the like. The disc mounting recess 92 a of the disc tray 92 is provided with a hole (not shown) for allowing a part of the disc clamper 19 to be inserted from the back side of the disc tray 92. Of course, the disc cartridge 99 is also provided with a hole (not shown) that is opened and closed by a shutter for the objective lens 3 of the biaxial actuator 7 to access.

  FIG. 19 is a perspective view showing the optical disc apparatus 100 in a state where the front panel 52, the back panel 53, the tray panel 108, and the like of the housing are removed from the state shown in FIG. Of the recording / reproducing unit 65, the disc clamper 19, the spindle motor 8, and the like are mounted on a movable base 98 that advances and retreats in the Y-axis direction along the guide shaft 66. The tray panel 108 (see FIG. 18) is also connected to the movable base 98 so as to move integrally with the movable base 98. On the other hand, the optical pickup 6 is fixed on the base plate 51 or is fixed to a member such as a frame fixed to the base plate 51. The movable base 98 is connected to the movable shaft 21a of the thread motor 21 via an appropriate member 21b, and is configured to be movable in the Y-axis direction. The sled motor 21 has a potentiometer (not shown) that measures the amount of movement in the Y-axis direction, and thereby detects the position of the optical disc 2 by a sled operation during recording or 90 playback. By such a sled mechanism 20, the movable base 98, the spindle motor 8, the disc clamper 19, and the tray panel 108 move integrally.

  A loading mechanism (not shown) for transporting the disc tray 92 is provided in the housing 55 between the disc clamper 19 and a position where the user outside the housing 55 can exchange the optical disc 2. The loading mechanism guides the conveyance of the disc tray 22 in the Y-axis direction along a pair of loading guides 91 provided in the housing 55 so as to face each other. That is, the disc tray 92 is configured to be movable relative to the movable base 98, the spindle motor 8, the disc clamper 19, and the tray panel 108 that move integrally. When the optical disc 2 is inserted and ejected, the movable base 98 is located closest to the front panel 52, and when recording or reproducing signals, the disc tray 92 is arranged at a position closest to the disc clamper 19. Yes.

  A motor guide plate 62 is disposed in the housing 55 so as to face both sides of the motor holder 117. In FIG. 18 and FIG. 19, only one motor guide plate 62 is shown. The motor guide plate 62 is provided with a guide groove 62a for engaging and guiding a guide pin 109 protruding from the motor holder 117. A part of the guide groove 62a is formed obliquely on the front panel 52 side in the Y-axis direction. As a result, the guide pin 109 is guided along the guide groove 62a, whereby the motor holder 117 is moved up and down (moved obliquely) on the front panel 52 side. By the vertical movement of the motor holder 117, the optical disc 2 is passed from the disc clamper 19 to the disc tray 92, and the optical disc 2 is passed from the disc tray 92 to the disc clamper 19. That is, since the disc tray 92 is fixed in the Z-axis direction, when the optical disc 2 is carried in, the optical holder 2 is pushed up by the disc clamper 19 by raising the motor holder 117 by driving the sled motor 21. Thus, the optical disk 2 is transferred to the disk clamper 19. Conversely, when the optical disk 2 is ejected, the motor holder 117 is lowered by driving the sled motor 21, so that the optical disk 2 is transferred from the disk clamper 19 to the disk tray 92.

  As described above, the lens according to the above embodiment is added to the optical disc apparatus 100 configured such that the optical pickup 6 does not move and the optical disc 2 is moved by the sled motor 21 of the sled mechanism 20 to record or reproduce signals. It is preferable that the cleaning mechanism 30 or 50 is mounted. 17 to 19, the lens cleaning mechanism 30 or 50 is not shown.

  However, it is not always necessary to mount the lens cleaning mechanism 30 or 50 on such an optical disc apparatus 100. The lens cleaning mechanism 30 or 50 may be mounted on the optical disc apparatus 100 in which the optical pickup 6 is threaded to record signals. However, in this case, in the case of an optical disk device in which the objective lens is threaded, the objective lens 3 and the lens cleaning mechanism 30 (or 50) are arranged so that the position of the hole 33a of the cleaning tape 33 does not shift with respect to the objective lens 3 during cleaning. Must be moved together.

  The present invention is not limited to the embodiment described above, and various modifications are possible.

  In the flowchart shown in FIG. 11, the signal was recorded or reproduced in an interrupted state. However, even if there is no optical disc 2 in the optical disc apparatus 100, cleaning by the lens cleaning mechanism 30 is naturally possible.

  In the above embodiment, the guide member 35 is provided. However, the guide member 35 is not necessarily required as long as the objective lens 3 can contact the cleaning tape with a necessary and sufficient pressing force. Various shapes and structures of the guide member 35 can be considered. Further, the guide member 35 may not be mounted on the biaxial actuator 7 and may be connected or supported at another place.

1 is a block diagram showing a configuration of an optical disc apparatus according to an embodiment of the present invention. It is a perspective view which shows a biaxial actuator. It is a perspective view which shows an objective lens. It is a side view which shows the external shape of an objective lens. It is a plane enlarged photograph which shows the end surface of an objective lens. It is a schematic diagram which shows the lens cleaning mechanism which concerns on one embodiment of this invention. It is a perspective view which shows the principal part of the lens cleaning mechanism. It is a perspective view which shows a cleaning tape. It is a perspective view which shows a mode that the objective lens was exposed from the hole of the cooling tape. It is an expanded sectional view which shows the guide member of a cleaning tape. It is a flowchart which shows operation | movement of a lens cleaning mechanism. It is a figure for demonstrating the operation | movement. It is a figure for demonstrating the operation | movement similarly, and is a top view which shows a mode that an objective lens contacts a cleaning tape and is cleaned. It is a perspective view which shows a mode when an objective lens contacts the cleaning area | region. FIG. 15A is an enlarged photograph of the end surface of the objective lens before cleaning. FIG. 15B is an enlarged photograph of the end surface of the objective lens after being cleaned by the lens cleaning mechanism. It is a perspective view which shows the principal part of the lens cleaning mechanism which concerns on other embodiment of this invention. 1 is a perspective view showing an optical disc apparatus according to an embodiment of the present invention. FIG. 18 is a perspective view showing an internal structure of the optical disc apparatus shown in FIG. 17. FIG. 19 is a perspective view showing the optical disc apparatus in a state where a front panel, a back panel, a tray panel and the like of the housing are removed from the state shown in FIG. 18.

Explanation of symbols

2. Recording medium (optical disc)
DESCRIPTION OF SYMBOLS 3 ... Objective lens 3a ... End surface 5 ... Laser light source 6 ... Optical pick-up 7 ... Biaxial actuator 8 ... Spindle motor 19 ... Disc clamper 20 ... Thread mechanism 30, 50 ... Lens cleaning mechanism 31 ... Supply reel 32 ... Collection reel 33 ... Cleaning Tape 33a ... Hole 33b ... Cleaning area 35 ... Guide member 36 ... Slit 37a, 38a ... Opening 39 ... Folding roller 100 ... Optical disk apparatus

Claims (13)

A holding mechanism for holding a disc-shaped recording medium capable of recording a signal;
An optical pickup that has an objective lens for collecting light on the recording medium held by the holding mechanism, and records or reproduces the signal;
A cleaning tape having a hole and cleaning the objective lens in contact with the objective lens, and the objective lens and the recording medium face each other through the hole at the time of recording or reproducing the signal; An optical disc apparatus comprising: a lens cleaning mechanism having a tape transfer mechanism capable of disposing the cleaning tape with respect to the objective lens. The optical disc apparatus according to claim 1,
2. An optical disk apparatus according to claim 1, wherein a plurality of the holes are arranged in the transfer direction of the cleaning tape. The optical disc apparatus according to claim 1,
An optical disc apparatus further comprising a sled mechanism that moves the holding mechanism in a radial direction of the recording medium when the signal is recorded or reproduced. The optical disc apparatus according to claim 1,
The optical disk apparatus, wherein the lens cleaning mechanism has a guide member for guiding the transfer of the cleaning tape. The optical disk device according to claim 4,
The guide member is
Two slits for passing the cleaning tape;
An optical disc apparatus comprising: an opening provided between the two slits so as to be blocked by the cleaning tape passing through the two slits and exposing the objective lens to the recording medium. The optical disk device according to claim 4,
The optical pickup has an actuator for moving the objective lens,
The optical disk apparatus, wherein the guide member is mounted on the actuator. The optical disc apparatus according to claim 1,
The optical pickup has an actuator for moving the objective lens,
The optical disc apparatus is
An optical disc apparatus further comprising control means for controlling the operation of the actuator during cleaning by the lens cleaning mechanism. The optical disk device according to claim 7,
The optical disk apparatus according to claim 1, wherein the control means causes the objective lens and the cleaning tape to contact each other by causing the actuator to generate a force in a focusing direction by a focusing servo on the objective lens. The optical disk device according to claim 7,
The optical disc apparatus, wherein the control means causes the objective lens and the cleaning tape to move relatively by causing the actuator to generate a force in a tracking direction by tracking servo on the objective lens. The optical disc device according to claim 2,
The optical pickup is
A light source;
The objective lens is mounted on one side, configured to take light from the light source from the side opposite to the one side and guide the light to the objective lens, and an actuator that moves the objective lens,
The tape transport mechanism is
A reel to which the cleaning tape can be supplied;
The cleaning tape supplied from the reel is transferred on the one side, and the cleaning tape is turned back and transferred on the opposite side to return the reel to the reel.
The cleaning tape as the hole,
A first hole for allowing the objective lens and the recording medium to face each other;
A second hole facing the first hole and allowing light from the light source to pass through;
An optical disc apparatus comprising: The optical disc apparatus according to claim 1,
The optical disk apparatus according to claim 1, wherein the objective lens has a numerical aperture exceeding 0.85 and being focused on the recording medium as near-field light. A tape-type lens cleaning device for cleaning an objective lens that collects light on a disc-shaped recording medium capable of recording a signal,
A cleaning tape having a hole and cleaning the objective lens in contact with the objective lens;
A tape transport mechanism capable of disposing the cleaning tape with respect to the objective lens so that the objective lens and the recording medium face each other through the hole during recording or reproduction of the signal. A tape-type lens cleaning device. A method of controlling an optical disc apparatus including an objective lens that collects light on a disc-shaped recording medium capable of recording a signal,
Cleaning the objective lens by bringing a cleaning tape having a hole into contact with the objective lens;
Disposing the cleaning tape with respect to the objective lens such that the objective lens and the recording medium face each other through the hole;
And a step of recording or reproducing the signal in a state where the objective lens and the recording medium face each other through the hole.