JPH0329125A - Objective lens cleaning device - Google Patents

Abstract

PURPOSE:To eliminate the need for specific processing and operation at the time of cleaning operation by turning an optical disk device to a waiting state when focus positioning processing is repeated by the prescribed number of times to clean an objective lens. CONSTITUTION:When a disk case 1 storing a cleaning disk 3 arranging an objective lens cleaning brush member 9 on a prescribed radius position is loaded to an optical disk device, an optical pickup device 17 is moved up to the position of the member 9 of the cleaning disk 3 and an objective lens 18 is focused. Since the focusing processing of the objective lens is failed because a proper signal beam can not be obtained from the cleaning disk 3, the focusing processing is repeated by the prescribed number of times to turn the optical disk device to the waiting state. Consequently, the objective lens is cleaned. Thus, the preparation of a specific software for cleaning the objective lens in a host device can be made unnecessary.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an objective lens cleaning device that cleans an objective lens of an optical pickup device that is installed in a medium exchange type optical disk device and records/reproduces data on an optical disk. Regarding.

[Prior Art] In a medium-exchangeable optical disk device, the inside of the device cannot be sealed in order to exchange the storage medium, and therefore dust contained in the air entering from the outside can enter the optical pickup device. It adheres to the objective lens, dirtying the objective lens and disturbing the wavefront of the signal light, causing problems such as data errors. For this reason, it is necessary to clean the objective lens, and the apparatus for this purpose is, for example,
There are those disclosed in Japanese Patent Application Laid-open No. 204441 and Japanese Patent Application Laid-Open No. 63-21497.

In the former device, the objective lens is cleaned using cleaning fibers attached to the optical disk, and in the latter device, the objective lens is cleaned using a cleaning disk to which a cleaning brush is attached. There is. [Problem M to be solved by the invention] However, in such a conventional device, the optical disc V
The host device to which the & This caused an inconvenience. In addition, the operator of the host device had to start the cleaning operation, which resulted in the inconvenience of requiring much effort on the part of the operator. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an objective lens cleaning device that does not require special processing or operations during cleaning operations. [Means for Solving the Problems] The present invention provides a cleaning disk that is provided with an objective lens cleaning brush member at a predetermined radius position and is detachable from a spindle motor, and has an outer shape that is approximately the same as a disk cartridge that stores an optical disk. When an optical disk is installed, the spindle motor starts rotating, moves the optical pickup device to a predetermined radius position, performs focus positioning of the objective lens, and performs the positioning process. The apparatus is equipped with a control means that repeats the process up to a predetermined number of times and shifts to a standby state if the process fails.

[Operation] Therefore, when the disk case containing the cleaning disk is attached to the optical disk device, the optical pickup device is moved to the position of the objective lens cleaning brush member of the cleaning disk, and the focus positioning process of the objective lens is performed. In that case, the cleaning disk cannot obtain an appropriate signal light, so the focus positioning process of the objective lens always fails. Therefore, when the focus positioning process is repeated a predetermined number of times, the optical disk device goes into standby mode. As a result, the objective lens is cleaned by the objective lens cleaning brush member. [Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a cleaning cartridge according to an embodiment of the present invention. In the figure, a cleaning case 1 has an optical disc (
The outer shape of the disc cartridge (not shown) that houses the optical disc (not shown) is approximately the same as that of the disc cartridge (not shown), and the opening 2 formed in the center of the disc cartridge (not shown) has a cleaning disc formed with a diameter smaller than that of the optical disc. 3 is the brush member (
(described later) is stored with the side facing down. A rib 4 for locking the outer periphery of the cleaning disk 3 is formed in the opening 2 at a position slightly lower than the surface 1a of the cleaning case l by a dimension slightly larger than the thickness of the cleaning disk 3. Further, the opening 2 has a recess 2a extending toward the insertion end of the optical disc device 8 so that the objective lens of the optical pickup device can be avoided when the optical disc device is installed. ．． Further, in order to prevent the housed cleaning disk 3 from falling off, a sheet member 5 on which handling instructions are printed is attached to the surface 1a of the cleaning case 1 using double-sided adhesive tape 6. Note that the double-sided adhesive tape 6 is attached in a manner that avoids the cleaning disk 3. Here, the diameter of the accommodating portion of the cleaning disk 3 in the opening 2 is set to be slightly larger than that of the cleaning disk 3, so that when the cleaning cartridge is installed in the optical disk device, the optical disk can be rotated and moved. The cleaning disk 3 is properly fixed to the spindle motor. In addition, since the side end position on the inner diameter side of the rib 4 is set to the outermost radial position of the brush member attached to the cleaning disk 3, when the cleaning disk 3 rotates, The brush member does not come into contact with the rib 4. FIG. 2 shows an example of the cleaning disk 3. As shown in FIG.

The cleaning disk 3 has a stepped opening 3b formed at the center of the upper surface of the disk 3a, and a convex portion of the plate disk 3C fits into the opening 3b from below. Further, a plate disk 3d is accommodated in the recess 3b' of the opening 3b, and the plate disk 3C and plate disk 3d are attached to the disk 3a by screwing the plate disk 3c and the plate disk 3d. Here, the plate disk 3C is made of a magnetic material so that it can be magnetically chucked to the spindle motor.

Notches 3e and 3f are formed on the outer periphery of the disk 3a at symmetrical positions with the center in between, and cutouts 3e and 3f are formed by cutting in the thickness direction on both sides of the notches 3e and 3f. Aspect rails 3g, 3h, 3i, 3j
is formed. Furthermore, recesses 3k and 311 for positioning the base member 7.8 to which the brush member is attached are formed in the rails 3g and 3i on the right side of the notches 3a and 3f.

The base members 7 and 8 are formed to have a thickness smaller than that of the disc 3a, and cutouts 3e and 3 are formed on both sides of the base members 7 and 8.
f rail 3 ge 3 h + 3 x + 3
grooves 7a, 7b, 8a, for engaging with j.
8b is formed, and the grooves 7a and 8a are formed with protrusions 7c and 8c that fit into the recesses 3k and 3+1 formed in the rails 3g and 3i. Therefore, the grooves 7a, 7b, 8a of the base members 7, 8,
8b, and rails 3gt3h, 3i, with notches 3e, 3f,
When the pace members 7 and 8 are attached to the notches 3e and 3f with the pace members 7 and 8 aligned so that they are engaged with each other,
The protrusions 7c, 8c of the grooves 7a, 8a are connected to the rails 3g,
The base members 7, 8 are positioned by entering into the recesses 3k, 3Q of 3i, and the base members 7, 8 are fixed in this state. In addition, the protrusions 7c and 8c form the recesses 3k and 31
1, the operator can confirm the attachment state of the base members 7 and 8.

Further, a rectangular hole 7d is formed in the center of the base member 7 (8), and a brush material 9a is formed in this hole 7d.
A brush member 9 is attached vertically to a base material 9b. The installation of this brush member 9 is as follows:
For example, this can be done using double-sided adhesive tape. In addition, grooves are formed on both sides of the ends of the base members 7 and 8 on the outer peripheral side of the circle g13a, which serve as a guide when attaching and detaching the base member 7 to the notches 3e and 3f. Therefore, when replacing the brush member 9, the entire base member 7 is replaced.

The brush member 9, for example, as shown in FIG. 3(b),
They are arranged in parallel at an interval twice the height of the brush material 9a,
Between two tapes 10.11 made of woven fabric,
A tape formed by weaving fibers 12 connecting between these tapes 10.11 is cut off in the middle of the length of the fibers 12 as shown by the arrow Rl, and each tape 10.11 is then separated as shown by the arrow R2. The brush member 9 is separated and formed according to the dimensions of the brush member 9.

In addition, as shown in the same figure (C), the brush member 9' can be directly implanted and shaped into the base member 7'.
As shown in FIG. 4A, the cost can be further reduced by forming the base member 7 and the brush member 9 separately and assembling them later.

Further, the brush member 9 can be replaced as shown in FIG. 4.

That is, for example, when replacing the brush member 9 of the base member 7, the cleaning disk 3 is appropriately rotated to bring the base member 7 into alignment with the recess 2a of the opening 2.

Then, when the base member 7 is pulled toward the outer circumferential side by applying a force greater than that which releases the engagement between the protrusion 7c and the recess 3k, the protrusion 7c
When the engagement of the recess 3k is released and further force is applied, the base member 7 is removed from the notch 3e. Then, by attaching a new base member 7 to the notch 3e, the old brush member 9 can be replaced. FIG. 5 shows the state in which the cleaning cartridge shown in FIG. 1 is installed in an optical disc device. The cleaning cartridge, like a commonly used optical disc cartridge, is positioned at a mounting position by a loading mechanism (not shown), and is thereby mounted on a turntable 14 disposed at the tip of a spindle motor 15 that rotates the optical disc. , the cleaning disk 3 is fixed to the spindle motor l5 with the disk plate 3c magnetically coupled.

Therefore, while the optical pickup device l7 is being moved near its home position, the spindle motor 1
5 rotates, the brush member 9 comes into contact with the surface of the objective lens 18 of the optical pickup device l7, thereby removing dust attached to the surface of the objective lens 18.
The objective lens l8 can be cleaned.

On the other hand, when cleaning the surface of the objective lens l8,
Since dust also adheres to the brush member 9, if the same cleaning cartridge is used several times, the tip of the brush material 9a of the brush member 9 becomes dirty, reducing the cleaning effect.

Therefore, a blank cleaning member 20 for cleaning the brush material 9a is disposed on the base member l9 of the optical disk device on the opposite side of the optical pickup device iEfl7 with the spindle motor 15 in between. Debris attached to the tip is removed.

Further, the size of the brush cleaning member 20 is set large in the disk rotation direction so that dust can be efficiently removed from the brush material 9a.

Here, the conditions for the material of the brush material 9a of the brush member 9 are that it should not damage the objective lens l8, and that it should not damage the objective lens l8.
For example, plastic fibers such as polypropylene fibers, fluororesin fibers, polyamide resin fibers, and acrylic fibers, or It is possible to use stainless steel fibers or the above plastic fibers with antistatic fibers arranged on them. According to experiments conducted by the inventors, it has been found that among these materials, polypropylene fiber is the most suitable material in terms of dust retention ability.

In order to optimize the contact pressure of the objective lens moving mechanism (not shown) to the cover 2l and to effectively remove dust attached to the objective lens l8, the diameter of the fiber should be set to 50 μm. I also found out that it is sufficient to keep it at a low level.

Further, the color of the brush material 9a may be set to white or a light color so that dirt on the brush material 9a can be easily determined.

The material of the brush cleaning member 20 may be, for example, polyether sponge or felt, which has a large coefficient of friction to efficiently remove dust from the brush material 9b, and can prevent the removed dust from scattering. It is preferable to use one that has a large dust holding capacity.

Furthermore, if the material of the cover 21 is softer than the material of the brush material 9a, there is a risk that the cover 21 will be scraped off when the brush material 9a comes into contact with the cover 21, generating dust. In order to prevent such inconvenience, as described above, when polypropylene is used as the material of the brush material 9a, the cover 21 should be made of polycarbonate, P.
It is better to use a harder material such as PS or polyester.

Now, when dust is removed from the objective lens 18 with the brush member 9, there is a risk that the dust will be scattered around.

In order to prevent such inconvenience, as shown in FIG. 6, around the holder 22 that holds the objective lens 18,
A wall member 23 higher than the objective lens 18 is provided, and the holder 2
A groove 24 is formed between the wall member 23 and the wall member 23.

Thereby, the dust removed from the objective lens 18 but not attached to the brush material 9a collides with the wall member 23 and falls into the groove 24, thereby preventing the dust from scattering around. Dust is also collected in the groove 25 formed between the end of the objective lens 18 and the holder 22.

In this way, by providing the groove 24 for collecting dust around the objective lens l8, it is possible to prevent dust from scattering. In addition, by further increasing the number of grooves 24,
The garbage collection effect can be improved. FIGS. 7(a) and 7(b) illustrate the optical system of the optical pickup device 17. Here, this optical pickup device i
17 is equipped with an optical system that focuses the laser beam using the knife-edge method. In the figure, a laser diode (semiconductor laser element) 3
The laser beam output from 0 passes through the coupling lens 3l.
is converted into parallel light (hereinafter referred to as a laser beam), transmitted through the polarizing beam splitter 32, and converted into circularly polarized light by the 174-wave plate 33.
8 and focused on the recording track of the optical disk 34.

The reflected light from the optical disk 34 (hereinafter referred to as signal light) is converted into substantially parallel light via the objective lens 18 again, and then passes through the 174-wave plate 33 again, so that the polarization axis is the output from the laser diode 30. The polarized laser beam is converted into linearly polarized light orthogonal to the polarized laser beam, and is thereby reflected by the polarizing beam splitter 32 in the direction of the lens 35. Half of the light flux that has passed through the lens 35 is reflected by a split mirror 36 that forms a knife edge, and is reflected by a light receiving element 37 for focus servo whose light receiving surface is divided into two by a dividing line parallel to the ridgeline 36a of the split mirror 36. The other portion is imaged on a track servo light-receiving element 38 whose light-receiving surface is divided into two in the tracking direction T perpendicular to the edge 1i36a, as shown in FIG. 1B.

The objective lens 18 is also provided with a racking mechanism for positioning the objective lens l8 in the radial direction of the optical disc 34, and a focusing mechanism for focusing. Note that hereinafter, the tracking mechanism and focusing mechanism are collectively referred to as an objective lens moving mechanism.

Then, an objective lens positioning servo control unit (described later) detects a position error (tracking error) of the laser beam on the recording track based on the output signal of the light receiving element 38, and controls the tracking mechanism according to the error. , the objective lens l8 is moved in a direction that reduces the positional deviation of the laser beam on the recording track.
Further, recording data is extracted from the sum of the output signals of the light receiving element 37 and the light receiving element 38. Further, the focus error of the laser beam is detected as follows.

When the focus of the laser beam is focused on the optical disk 34, as shown in FIG. As a result, the amount of light received by the light receiving surface 37a and the amount of light received by the light receiving surface 37b become equal. When the optical disk 34 moves away from the focused position of the laser beam, as shown in FIG.
Since it is located in front of the light receiving surfaces 37a and 37b, the amount of light received by the light receiving surface 37a is larger than the amount of light received by the light receiving surface 37b. When the optical disc 34 approaches the focused position of the laser beam, as shown in FIG. Therefore, the light receiving surface 3
The amount of light received by 7a becomes smaller than the amount of light received by light receiving surface 37b. Therefore, the light-receiving signal on the light-receiving surface 37a and the light-receiving surface 3
Based on the difference between the light reception signals at 7b, a forcing error signal Sf representing the focusing error can be obtained (see FIG. 9). Then, the servo control section controls the focusing mechanism to reduce the error, thereby moving the objective lens 18 in a direction that reduces the focal shift of the laser beam on the recording track.

FIG. 10 shows an example of a control system of an optical disc device. In the figure, the objective lens positioning servo control section 40 controls the tracking mechanism and focusing mechanism of the objective lens 18, respectively, based on the tracking error signal and the focusing error signal obtained from the optical pickup device l7, as described above. It is something to do.

The data recording/reproduction control section 41 includes a laser diode 30
It modulates the amount of light emitted by the recording data, and also forms a reproduction signal based on the light reception signals of the light receiving elements 37 and 38 of the optical pickup device 17.

The seek motor servo control section 42 is for controlling the positioning of a seek motor (not shown) that reciprocates the optical pickup device 17 in the radial direction of the optical disk 34. The optical pickup device 11 also includes a home position sensor (not shown) for detecting that the optical pickup device 17 is located at a predetermined home position.
Position detector for detecting movement of 7 (illustrated ll8)
is attached to the seek motor, and the seek motor servo control section 42 determines the current position of the optical pickup device 17 based on the output signals of the home position sensor and the position detector.

The spindle motor servo control section 43 is for controlling the rotation of the spindle motor 15.

Further, the spindle motor 15 is provided with a position detector (not shown) for detecting its rotation, and the spindle motor servo control unit 34 controls the spindle motor 15 based on the detection signal of this position detector. The rotation speed is being detected.

The optical disk control section 44 is for performing operations instructed by a host device (not shown) that uses this optical disk device, and is for performing operations instructed by the objective lens positioning servo control section 40.
, data recording/reproduction control section 41. Seek motor servo control section 42 and spindle motor servo control section 43
The optical disc 34 performs operations such as self-diagnosis of the device and data recording/reproduction on the optical disk 34 by exchanging various information with the optical disc 34.

The loading mechanism 45 is for loading and unloading the optical disc 34, and notifies the optical disc control device 44 of information on the presence or absence of the optical disc 34, and receives commands such as prohibition of ejection from the optical disc control device 44.

With the above structure, the control system of the optical disk device shown in FIG. 10 is as shown in FIG. (a). Execute the self-diagnosis process shown in (b). In the following description, the objective lens positioning servo control section 40, data recording/
Reproduction control section 41. The operations of the seek motor servo control section 42, spindle motor servo control section 43, and optical disk control section 44 are performed without distinction.

That is, first, the rotation of the spindle motor l5 is started, and it is checked whether the rotation speed becomes a constant value and the rotation unevenness is below a predetermined value (process 10).
1).

As a result, it is determined whether or not any error has been detected in the spindle motor l5 (decision 102).
When the result of step 2 is YES, a spindle motor error code indicating that an error has occurred in the spindle motor is internally set (processing 103).
．． Shift to standby state.

When the result of judgment 102 is NO, the laser diode 30 is once turned on (process 1o4), the seek motor is moved while monitoring the detection signal of the home position sensor, and the optical pickup device 17 is moved to the optical disk 34. It moves to the home position set outside the recording area at the innermost circumference (process 105).

Next, move A(m+I1) from the home position in the outer circumferential direction and within the marked @ area of the optical disc 34.
The optical pickup device 17 is moved while monitoring the detection signal of the position detector (processing 106).

In this process 105 and process 106, it is determined whether any abnormality is detected in the seek motor (determination 107), and when the result of determination 107 is YES, it indicates that an error has occurred in the seek motor. A seek motor error code is internally set (process 108), and the process shifts to a standby state.

When the result of judgment 107 is NO, the laser diode 30 starts to light up (process 109), and the objective lens 1
A focus-in process 110 is executed to focus the focal position of No. 8 on the recording surface of the optical disc 34.

In this focus-in processing 110, when the objective lens l8 is moved up and down by the focusing mechanism, it is checked whether the focus error signal Sf shown in FIG. 9 can be obtained appropriately, and if it is not obtained, the operation is This is repeated a predetermined number of times, for example, up to five times.

If the focus error signal Sf is not obtained even after repeating this operation five times, it is determined that a focus error has occurred. When the process 110 is finished, it is checked whether a focus error has been determined in the process 110 (judgment l11).
When the result of the judgment 111 is YES, a focus error code indicating that a focus error has occurred is internally set (processing 1l2), and the process shifts to a standby state. Further, when the result of the judgment 111 is NO, it means that the optical disk 34 is loaded and the data can be accessed appropriately.
13), the data on the recording track positioned at that time is read, and the identification information (ID) of the sector, which is the unit of data recording on the recording track, is determined (processing 114). If this ID reading cannot be performed properly (the result of judgment 115 is VES), the laser beam is moved in the inner circumferential direction (process 116), and the process returns to process 114 to read the IO again. Then, this process is
Repeat until D is properly obtained. If the ID is properly read and the result of judgment 115 is NO, the sector address of the sector read at that time is calculated based on the contents of the ID (process 117), and based on that sector address, the The distance to address 0, which is the reference position of , is calculated (process 118). Since the self-diagnosis operation is in progress at this time, the optical pickup device 17 is moved by the distance calculated in step 118 by the seek motor while outputting the seek completion status to the host device is internally prohibited (step 119). , performs a seek operation to address 0 (process 120
). In this way, the optical backup device 17 is set to address 0.
After positioning, a status code indicating that the self-diagnosis has been successfully completed is internally set (processing
2l), this process is ended and the state shifts to a state where it waits for a command from the host device. Therefore, when the power is turned on with the cleaning cartridge installed in the optical disk device, if the spindle motor 15 and seek motor are operating normally, the focus-in process 11
0 is executed. At this time, the reflected light from the cleaning disk 3 is not sufficient, and as a result, the focus error signal Sf
cannot be obtained appropriately, so in focus-in processing 110, the objective lens 18 is moved up and down five times, and then a focus error state is determined. As a result, the result of determination 111 becomes VES, and the optical disc device shifts to a standby state with the focus error code set. Also, at this time, the optical pickup device l7 is located near the home position, so the optical pickup device l7 is located near the home position. ! The objective lens 18 of No. 17 and the brush member 9 of the cleaning disk 3 are in a position where they can come into contact with each other. At the same time, the cleaning disk 3 is rotated at a constant rotation speed, for example, 660 rpm, by the spindle motor l5.
If it takes about 1 second to move the objective lens 18 up and down once, the brush member 9 attached to the cleaning disk 3 will move 50 - Contact is made about 60 times. As a result, the cleaning operation of the objective lens l8 is performed. On the other hand, when the disk cartridge containing the optical disk 34 is installed in the optical disk device and the power is turned on, if the optical disk 34 is in good condition, the focus error signal Sf can be appropriately obtained in the focus-in process 110, so the judgment 111 The result is No, therefore,
After processing 113 and subsequent parts are performed, the optical disc 3
Access to 4 is now ready. In this way, in this embodiment, when the cleaning cartridge is installed when the power is turned on, the cleaning operation of the objective lens 18 is automatically performed, and when the normal optical disc 34 is installed, the cleaning operation of the objective lens 18 is automatically performed. As sequential operations are performed to access the optical disk 34, the operator and host device
No special operations and treatments are required to clean the 8.

Further, since the positional relationship between the brush member 9 and the objective lens l8 is constant and the number of cleaning operations is approximately constant, the cleaning effect can be kept constant.

Incidentally, in the above embodiment, the cleaning disk is provided with two brush members, but the number may be one, or may be three or more. However, when installing multiple brush members, to avoid uneven rotation,
It is necessary to arrange each brush member so that it is point symmetrical with respect to the rotation center of the cleaning disk.

Furthermore, in the embodiment described above, the self-diagnosis operation is performed when the cleaning disk or optical disk is installed when the FFI power is turned on, but the self-diagnosis operation is performed when the cleaning disk or optical disk is installed after the power is turned on. You may also do this. Further, this self-diagnosis operation can also be performed in response to a request from the host device. Furthermore, this self-diagnosis operation can be performed every time a new disk is installed. Further, if the loading mechanism is of an automatic loading type equipped with a loading motor, the self-diagnosis operation may be performed after the loading of the disk cartridge is completed.

[Effects of the Invention] As explained above, according to the present invention, when a disk case containing a cleaning disk in which an objective lens cleaning brush member is disposed at a predetermined radius position is attached to an optical disk device, the objective lens of the cleaning disk is removed. The optical pickup device is moved to the position of the lens cleaning brush member, and the focus positioning process of the objective lens is performed. In that case, the cleaning disk cannot obtain an appropriate signal light, so the focus positioning process of the objective lens always fails. Therefore, when the focus positioning process is repeated a predetermined number of times, the optical disk device goes into standby mode. to move to. As a result, the objective lens is cleaned by the objective lens cleaning brush member attached to the rotating cleaning disk. As a result, there is no need to prepare special software for cleaning the objective lens in the host device, and there is no need for the operator's effort, so the cleaning operation can be performed very easily and the cost can be reduced. get.

[Brief explanation of drawings]

FIG. 1 is an assembled perspective view showing a cleaning cartridge according to an embodiment of the present invention, FIG. 2 is an assembled perspective view showing an example of the structure of a disk cartridge, and FIG. 3(a) is a base member and a brush member. An assembled perspective view showing an example of how to install the
b) is a schematic perspective view showing an example of manufacturing a brush member;
) is a schematic perspective view showing another example of the brush member, FIG. 4 is a plan view for explaining the replacement of the base member, and FIG. Figure 6 is a schematic cross-sectional view showing an example of attaching an objective lens, and Figures 7 (a) and (b)
) is a schematic diagram showing an example of the optical system of an optical pickup device,
Figures 8 (a) to (c) are schematic diagrams showing the principle of the shape of a forcing error signal using the knife edge method, the 9th diagram is a waveform diagram showing an example of a forcing error signal, and the 10th
The figure is a block diagram illustrating a control system of an optical disk device, and FIGS. 11(a) and 11(b) are flowcharts illustrating an example of self-diagnosis processing. l...Cleaning case, 3...Cleaning disk, 7, 8...Base member, 9...Brush member, 18...Objective lens, 23...Wall member, 24.2
5... Groove, 40... Objective lens positioning servo control section, 41... Data recording/reproduction control section, 42... Seek motor servo control section, 43... Spindle motor servo control section, 44. ...Optical disc control unit. 1 Fig. 6 Fig. 3 (a) (c) 9 (b) 10 2 Fig. 3 Fig. 4 Fig. 5 5 Fig. 17 6 Fig. 22 18 8 Fig. 1 l Fig. 9 Fig. St Fig. 7 (b) ) Figure 11(b)

Claims (1)

[Claims] In an objective lens cleaning device that cleans the objective lens of an optical pickup device that is installed in a medium-exchangeable optical disk device and records/reproduces data on an optical disk, an objective lens cleaning brush member is installed at a predetermined radius position to clean the optical disk. A cleaning disk is detachably attached to a spindle motor that is driven to rotate; a disk case that stores the cleaning disk and whose outer shape is approximately the same as a disk cartridge that stores an optical disk; The invention is characterized by comprising a control means that moves the optical pickup device to a predetermined radius position and performs focal positioning processing of the objective lens, and if the positioning processing fails, repeats the processing up to a predetermined number of times and shifts to a standby state. Objective lens cleaning device.