JP2005293694A - Optical pickup device and optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical pickup device having a configuration capable of avoiding inadvertent contact with a lens with a simple configuration and solving a problem due to contamination of the lens.
A spindle motor that includes a lens facing an optical disk and that is configured to be scanned by moving the lens in an inner circumferential direction and an outer circumferential direction of the optical disk. The spindle motor rotates and drives the optical disk. And a moving means 104 for moving the occupied area of the clamp holder 2 for supporting the clamp 3 for fixing the optical disk to the scanning area for the optical disk from the occupied area. The lens is positioned within the occupied area of the clamp holder 2 when the optical disk is pulled out or at any time when writing or reproduction on the optical disk is completed.
[Selection] Figure 7

Description

  The present invention relates to an optical pickup device and an optical disk device, and more particularly to a protection mechanism for a lens used in the pickup device.

  An optical disk is one of the media for recording large-capacity information. The optical disk is a CD-R (CD recordable) that can be written only once, and a CD-E (CD-E that can be repeatedly written and erased multiple times). CD erasable) or CD-RW (CD rewritable). In addition to the CD, there is a DVD (Digital Versalite Disc) capable of recording information of a larger capacity than this.

  The optical disk apparatus that reads and writes each of these optical disks includes a system in which only a tray portion that can hold an optical disk in a state where the optical disk is mounted is taken out from an optical disk apparatus main body that houses an optical pickup and related members, There is a system in which an optical disk apparatus main body in which a pickup and related members are stored is taken out to the outside.

The optical disk apparatus using each of the above-described methods is generally equipped with the following components.
An optical pickup, an optical pickup actuator, a pickup housing portion that supports the actuator and incorporates an optical component such as a semiconductor laser as a light source, and the pickup housing is moved toward the inner or outer periphery of the optical disk by a seek motor or the like. These are a pickup source such as a seek motor and a guide rail that guides the pickup housing toward the inner or outer periphery of the optical disk, a spindle motor that rotates the optical disk, and the like (for example, Patent Document 1). ).

  In addition to these components, the former method is provided with a tray that can be held in a state where an optical disk is mounted and a loading mechanism for sliding the tray, and the latter method has no tray and loading mechanism. Each component is provided in a drawer corresponding to a chassis that can be pulled out to the outside.

  By the way, when the optical disk apparatus is handled as a peripheral device of a computer, the optical disk apparatus itself is housed in a casing in the former method, and the tray can be pulled out from a part of the casing. It may be removed and incorporated into a computer with reduced weight. In this case, the lens mounted on the optical pickup is exposed.

  On the other hand, in the latter method, since the drawer itself is pulled out to the outside, the lens mounted on the optical pickup is exposed as in the former method.

  The lens exposed to the outside may inadvertently touch the user or serviceman, and there is a risk that the read / write scanning performance will be deteriorated due to contamination of the lens.

  Conventionally, for the purpose of protecting the lens, a lens cover is provided to prevent the lens from being soiled even when it is touched (for example, Patent Document 1), or the lens is moved beyond the radius of the optical disk to be inside the casing. There has been proposed a configuration in which the lens is positioned at a lens protection position provided in (for example, Patent Document 1).

JP-A-8-263851 (paragraph "0006" column) JP-A-9-320060 (paragraphs “0005” and “0007”)

  However, when a lens cover is provided, not only a special configuration is provided, but the overall height of the lens is increased. For this reason, there is a possibility that the cover may interfere with neighboring members when the tray is moved, and there is a possibility that the size of the tray housing portion will be inadvertently large.

  On the other hand, in the configuration in which the lens is moved toward the lens protection position provided in the casing, a configuration for protection is required separately from the existing configuration in the optical disc apparatus, which may lead to complexity of the configuration.

  In view of the problems in the conventional optical disc apparatus, an object of the present invention is to provide an optical pickup apparatus having a configuration capable of avoiding inadvertent contact with a lens with a simple configuration and eliminating a problem due to contamination of the lens, and To provide an optical disk device.

  According to a first aspect of the present invention, there is provided an optical pickup device comprising a lens facing the optical disc and capable of scanning by moving the lens in an inner circumferential direction and an outer circumferential direction of the optical disc. And a moving means for moving the clamp holder for supporting a clamp for fixing the optical disk to a spindle motor to be driven, and moving from the occupied area to a scanning area for the optical disk. The lens is positioned within the occupation area of the clamp holder when the optical disk is pulled out or at the end of writing or reproduction on the optical disk.

  According to a second aspect of the present invention, in the optical pickup device according to the first aspect, the moving means sets the position of the lens when the optical disk is not loaded when the tray on which the optical disk is loaded is pulled. It is characterized by being set within the occupation area of the clamp holder.

  According to a third aspect of the present invention, in the optical pickup device according to the first or second aspect, the moving means is configured to perform the above operation when the optical disk is not mounted when performing an initializing operation when the power is turned on. The position of the lens is set within the occupation area of the clamp holder.

  According to a fourth aspect of the present invention, the optical pickup device according to any one of the first to third aspects is used for an optical disc apparatus.

  According to a fifth aspect of the present invention, in the optical disc apparatus according to the fourth aspect, the clamp holder can cover the entire optical pickup device when the optical pickup is located at the innermost peripheral position of the optical disc. It is characterized by having a size.

  According to a sixth aspect of the present invention, as a scanning mechanism for the optical disc, an optical pickup actuator unit including a lens unit, a pickup housing unit holding the actuator unit and incorporating an optical component such as a semiconductor laser, and the pickup housing unit Pick-up module part comprising two rail shaft parts for holding the optical disk, a spindle motor which holds the rail shafts, which is a rotation driving means for the optical disk, a seek motor which is a lens moving means, and a motor board , A drawer unit to which the module unit is fixed, a lock mechanism for holding the entire drawer unit inside the drive housing, a mechanism for releasing the lock mechanism, an eject button unit for recognizing an eject operation, and an electronic component for performing signal processing The mounted circuit board and An outside part, in the optical disc apparatus these units are capable drawer configured externally with an optical disc, the lens is characterized that is provided at a position not opposed to the optical disc when the drawer command of the optical disk was made.

  According to a seventh aspect of the present invention, in the optical disc apparatus according to the sixth aspect, the protective portion of the lens is provided on a part of the exterior component at a position outside the outermost peripheral position of the optical disc and above the lens. It is characterized by a configuration that protrudes into the area.

  According to an eighth aspect of the present invention, in the optical disc apparatus according to the seventh aspect, the protective portion of the lens includes a cover member imparted with a movement habit in a direction that can cover the upper side of the lens. The pickup housing is moved when it moves toward the outer periphery of the optical disk by the seek motor, so that the pickup housing moves to a position covering the upper side of the lens.

  According to a ninth aspect of the present invention, in the optical disc apparatus according to the eighth aspect, the cover member can be displaced between a position covering the upper side of the lens and a position deviating from the upper side of the lens. Displacement behavior to a position deviating from the position is imparted, and when interfering with the pickup housing, it is configured to displace to a position covering the upper side of the lens against the displacement behavior.

  According to a tenth aspect of the present invention, in the optical disc apparatus according to the eighth or ninth aspect, the cover member is constituted by a single member that can be rotated with a fulcrum interposed therebetween, and the one rotation end with the fulcrum interposed between the cover member. An urging member is provided for imparting a displacement behavior in a direction away from the upper side of the lens, and the other rotation end is a portion that interferes with the pickup housing, and the rotation end when the other rotation end interferes with the pickup housing. It is the structure which covers the upper part of the said lens by one side of a rotation end by moving.

  According to the first to third aspects of the present invention, when the tray on which the optical disk can be mounted is pulled out, or when the writing or reproduction is finished, the lens is moved into the occupation area of the clamp holder to clamp the clamp holder. Can cover the lens. Thereby, since the clamp holder which is an existing component member can be used as a member for lens protection, it is not necessary to prepare a special lens protection member, and the cost can be reduced by using a simple configuration.

  According to the fourth aspect of the present invention, when the lens is not used, the lens can be moved to the corresponding protected position within the occupied area of the clamp holder, which is an existing component member. It becomes possible to reduce.

  According to the fifth aspect of the present invention, it is possible to protect the lens for preventing contamination only by using a clamp holder that can cover the entire optical pickup device.

  According to the sixth and seventh aspects of the present invention, when a command for pulling out the optical disk is issued, the lens can be protected by moving the pickup device outside the outermost peripheral position of the optical disk, so that the opportunity to contact the lens The lens can be surely protected when the optical disc is pulled out.

  According to the eighth to tenth aspects of the present invention, since the cover member used for the protection portion of the lens is configured to interlock with the movement of the light pickup housing, no special drive mechanism is required, and the configuration is simplified. Cost reduction is possible.

  The best mode for carrying out the present invention will be described below with reference to embodiments shown in the drawings.

  FIG. 1 is a schematic diagram showing a configuration of a main part of an optical disk device to which an optical pickup device according to an embodiment of the present invention is applied. The main part shown in FIG. This corresponds to a drive mechanism (loading unit) of an optical pickup device built in the DVD recorder.

  In the figure, reference numeral 1 denotes an exterior portion of the loading unit, and a clamp holder 2 is fixed inside. The clamp holder 2 is a member that supports a clamp 3 for fixing and holding the optical disk on a spindle motor that rotates the optical disk. Although not shown, the clamp holder 2 remains in a fixed position even after the tray on which the optical disk can be mounted is pulled out. Thus, the clamp 3 is held.

In FIG. 1, reference numeral 4 denotes a pickup housing constituting the optical pickup device, and includes an objective lens 5 having a lens surface facing the optical disk.
The pickup housing 4 can move along a support shaft 6 having an axial direction in the radial direction of the optical disk, and performs a read / write operation on information on the optical disk surface.

  FIG. 2 is a side view of the drive mechanism shown in FIG. 1, in which the pickup housing 4 can be moved along the support shaft 6 by driving a seek motor (not shown). The state shown in FIG. 2 is a state in which the pickup housing 4 is moved to a position facing an optical disk (not shown). In this state, the objective lens 5 provided in the pickup housing 4 is exposed and exposed to the outside. Yes.

  FIG. 3 is a block diagram for explaining the configuration of the control unit 100 for causing the pickup housing 4 to move. In FIG. 3, the control unit 100 performs focusing, which is a part of the conditions as an optical pickup. This is a part that performs tracking control and reading signal processing. As a member related to this embodiment, on the input side, an eject switch 101 that outputs a tray drawing command, an operation unit 102 that detects the end of read / write processing, and a power switch 103 is connected, and the drive unit 104 of the seek motor is connected to the output side.

In the control unit 100, when an eject command by the eject switch 101, a read / write completion signal or an initialization command performed when the power switch 103 is turned on is input, the position of the pickup housing 4 is detected and the innermost circumference of the optical disk is forcibly detected. The objective lens 5 is protected by the clamp holder 2 at the position.
In other words, when a tray pull-out command is issued, a read / write processing end operation and a data transfer processing end operation, which are processes necessary for the tray pull-out, are performed, and when these operations are completed, a lock mechanism (not shown) is released. Then, a process for pulling out the tray is performed, and the pickup housing 4 is moved toward the protection position of the objective lens 5.

  In this embodiment, the protection position of the objective lens 5 is the area occupied by the clamp holder provided as an existing component in the optical disk apparatus. As a result, the pickup housing 4 moves into the area occupied by the clamp holder 2, so that the upper part of the objective lens 5 is covered by the clamp holder 2, and contact with the objective lens 5 can be avoided. The control unit 100 once determines the position of the pickup housing 4 based on the rotation direction and the rotation amount from the initial state of the seek motor at the end of the above-described operation, and is not at the innermost circumference of the optical disk, that is, the position closest to the spindle motor. The pickup housing 4 is moved toward the position of the clamp holder 2 provided at the innermost peripheral position.

  Such processing is similarly performed at the time of completion of reading / writing or initialization processing at power-on.

  FIG. 4 shows a state in which the pickup housing 4 is located in the innermost circumference of the optical disc and is located in the occupation region of the clamp holder 2, and FIG. 5 shows the state shown in FIG. 4 in plan view. FIG. When the pickup housing 4 is located on the innermost periphery of the optical disc, at least the upper part of the objective lens 4 is covered by the clamp holder 2, but not limited to this, as shown in FIG. It is also possible to set the size of the clamp holder 2 so that the entire pickup housing 4 is covered with the clamp holder 2 when positioned on the innermost circumference of the optical disk.

Next, the operation of the control unit 100 will be described.
FIG. 7 is a flowchart for explaining the operation of the control unit 100. In FIG. 7, when a command to pull out the tray is input by an ON signal from the eject switch 101 or an eject command based on the ON signal (ST1). The current data read / write process or data transfer process is completed (ST2).
When each operation is completed, it is determined whether or not the pickup housing 4 is located on the innermost circumference (ST3). If not, the seek motor is driven to move the pickup housing 4 to the innermost circumference. Thus, the objective lens 5 is positioned within the occupation region of the clamp holder 2 (ST4). When the process of step ST4 is completed, a tray drawing operation is executed (ST5). By executing such processing, when a command for pulling out the tray is issued, the position of the pickup housing 4 is determined, and then the objective lens 5 is positioned on the innermost circumference of the optical disc by the clamp holder 2. Since it can be protected, inadvertent contact with the objective lens 5 and adhesion of contaminants can be prevented.

  FIG. 8 is a flowchart showing a process when a conventional tray is pulled out, and after the processes having the contents indicated by reference numerals ST1 and ST2 in FIG. 7 are similarly executed, the tray is pulled out. Therefore, unlike the processing of the present embodiment shown in FIG. 4, when the tray is pulled out, the pickup housing only stops at the position where the content processing of step ST2 is completed, and is forced toward the innermost periphery of the optical disc. There is no movement. For this reason, depending on the position of the pickup housing, the objective lens 5 may remain exposed, and there is a possibility that floating substances may adhere or come into contact when the tray is pulled out or stored.

Next, a modification of the main part of the embodiment will be described.
FIG. 9 is a flowchart for explaining a conventional example regarding processing when a tray is pulled. In FIG. 9, when a tray pulling command is issued by an eject switch or a load command (ST10), the tray is pulled. (ST11).
When the tray is pulled into the optical disc apparatus, it is determined whether or not the optical disc is mounted on the tray (ST12). When the optical disc is mounted, the pickup housing performs a normal mounting operation (ST13). If it is not mounted, the pickup housing performs a standby operation at the current position (ST14).

  When such processing is executed, the pickup housing stops at the current position, and the objective lens may remain exposed. In other words, the optical disk mounting status is not determined by using a pickup, but the rotational torque of the spindle motor is used as a determination condition. For this reason, the case where the optical disk is not mounted is determined regardless of the position of the pickup housing. As a result, the object comes into contact with the objective lens or the adhering floating substance from the periphery is generated during replacement or maintenance.

In this embodiment, the objective lens is protected by detecting the position of the pickup housing even when the tray is retracted.
FIG. 10 is a flowchart for explaining the operation of the control unit 100 in this case. In FIG. 10, when it is determined in step ST12 in FIG. 10 that no optical disk is mounted, the position of the pickup housing 4 is determined. If it is determined (ST15) and is not located on the innermost circumference, it is moved toward the innermost circumference (ST16). By such processing, the objective lens 5 of the pickup housing 4 is not exposed when the optical disk is not mounted on the pulled-in tray, so that contact and adhesion of fouling substances can be reliably prevented. .

  In the embodiment as described above, since the existing component member called the clamp holder can be used as the protective part of the objective lens, it is possible to protect the lens with a simple configuration without providing a special protection structure. .

Next, embodiments relating to the inventions of claims 6 and 7 will be described.
This embodiment is not a configuration in which only the tray on which the optical disk is mounted is drawn, but a configuration in which each member including an actuator including a pickup is incorporated in a drawer corresponding to the chassis, and the drawer itself is pulled out. Yes.

FIG. 11 is a plan view showing a main part of an optical disk apparatus called a slim type that can be pulled out by the drawer itself. In FIG. 11, the outer case 201 of the optical disk apparatus 200 is pulled out to the outside by a guide rail 201A. A drawer 202 that is slidably guided is provided, and a pickup module 203 is provided on the bottom plate of the drawer 202.
The pickup module 203 is equipped with a spindle motor 204 that rotationally drives the optical disc D and a pickup actuator 206 that includes an objective lens 205, and is slidable by a guide shaft 207 that is juxtaposed in the radial direction of the optical disc D. A seek motor 209 is provided as a drive member that slides the pickup housing 208 toward the inner and outer circumferences of the optical disk.
The driving force from the seek motor 209 is transmitted to the pickup housing 208 via a tooth 208A that meshes with a screw portion provided on the output shaft of the seek motor, whereby the pickup housing 208 can reciprocate.

A part of the drawer 202 is provided with a drawer claw 202A that can be engaged with and disengaged from the lock release mechanism 300 provided on the exterior case 201 side. The drawer claw 202A is operated by a solenoid 301 included in the lock release mechanism 300. The eject lock lever 302 can be engaged and disengaged.
In the lock release mechanism 300, an eject lock lever 302 is swingably provided so that the engagement state with the drawer pawl 202A can be released in accordance with the excitation operation of the solenoid 301.

  FIG. 11 shows a state in which the drawer 202 is pulled into the outer case 201, and FIG. 12 shows a state in which the drawer 202 is pulled out from the outer case 201.

11 and 12, the drawer 202 is provided with a protective part 310 for the objective lens at a position outside the outermost periphery of the optical disc D.
As shown in FIG. 13, the protection unit 310 is a cover member having an inverted L-shape in a side view that stands upright at a position outside the outermost periphery of the optical disc D, and can cover the top of the objective lens 206. Thus, the optical disk D projects toward the outermost periphery.

  In the present embodiment, the pickup housing 208 is forcibly moved toward the protection unit 310 at a time when the objective lens 205 needs to be protected, and the control conditions relating to this movement are applied to the control unit 100 shown in FIG. It is the same as conditions.

  In this embodiment, the pickup housing 208 is configured as described above when the optical disk D is not mounted, when the power is turned on or ejected, and further, for example, within the outer periphery of the optical disk D as shown by the solid line in FIG. 13, as shown by a two-dot chain line in FIG. 13, the seek motor 209 is operated at the end of reading and writing to be forcibly moved toward the protection unit 310. As a result, the upper portion of the objective lens 205 is covered with the cover member that constitutes the protection unit 310, so that contact with the objective lens 205 and adhesion of pollutants are prevented.

Next, embodiments according to the eighth to tenth aspects of the present invention will be described.
This embodiment is characterized in that it is driven by a pickup housing that has been moved to a position where the protective part of the objective lens is to be protected.
FIG. 14 is a diagram for explaining the relationship between the objective lens protection unit 400 and the pickup housing 208. In FIG. 14, the objective lens protection unit 400 is swingably supported on the pickup module 203 side. The habit of moving in a direction that can cover the upper side of the objective lens 205 is given.
In the present embodiment, as shown in FIG. 14A, the protection unit 400 is constituted by a cover member 400A using a single member that can be rotated with the support pin 401 as a fulcrum. One of the moving ends is provided with an elastic body 402 such as a spring provided between the pickup module 203 and a non-moving portion, and is rotated away from the objective lens 205 and moved to a position away from the objective lens 205. Habits are given.

  The other rotation end of the protection unit 400 has advanced into the movement path of the pickup housing 208 and can interfere with the operating piece 208A provided on the pickup housing 208 side.

  In this embodiment, when the pickup housing 208 is at a position facing the optical disk, the cover member 400A is moved to a position away from the objective lens 205 by the urging force of the elastic body 402, and this position is held by a locking portion (not shown). It is positioned.

  On the other hand, when the pickup housing 208 moves toward the protection part 400, the other of the rotating ends entering the movement path of the cover member 400A is the one part 208A of the pickup housing 208, as shown in FIG. The cover member 400 </ b> A rotates in a direction to cover the objective lens 205. As a result, the objective lens 205 is covered with the cover member 400 </ b> A so that contact and fouling substances are prevented from being attached.

  In the present embodiment, it is only necessary to use the pickup housing 208 which is an existing component member in which the rotation of the cover member 400A which is a rotation member is moved, so that no special structural parts for protecting the objective lens are required. Just do it.

It is a top view for demonstrating the drive mechanism of the optical pick-up apparatus by the Example of invention of Claims 1 thru | or 5. FIG. 2 is a side view of the drive mechanism shown in FIG. 1. It is a block diagram for demonstrating the structure of the control part used for the drive mechanism shown in FIG. It is a figure for demonstrating an aspect to the optical pick-up apparatus shown in FIG. It is a top view which shows the one aspect | mode of the optical pick-up apparatus shown in FIG. It is a top view which shows the partial modification in the Example shown in FIG. It is a flowchart for demonstrating the effect | action of the control part shown in FIG. It is a flowchart for demonstrating the control content at the time of tray drawing-out in the prior art example with respect to a present Example. It is a flowchart for demonstrating the control content by the tray drawing character in the prior art example with respect to a present Example. It is a flowchart for demonstrating the control content at the time of tray drawing by a present Example. It is a top view for demonstrating the principal part structure of the optical disk apparatus by this invention Example. It is a top view which shows the drawer state of the principal part structure shown in FIG. It is an arrow view of the direction shown with a code | symbol (13) in FIG. It is a figure for demonstrating the other example of the protection part used for FIG. 11, (A) is the state from which the protection part removed from the objective lens, (B) is the state in which the protection part has covered the objective lens, respectively. Show.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exterior part used for drive mechanism of optical pick-up apparatus 2 Clamp holder 3 Clamp 4 Pick-up housing 5,205 Objective lens 100 Control part 101 Eject switch 102 Operation part 103 Power switch 200 Optical disk apparatus 202 Drawer 203 Pick-up module 204 Spindle motor 206 Pick-up Actuator 208 Pickup housing 208A Single part 310, 400 Objective lens protection part 400A Cover member made up of a single member 401 Support pin 402 Elastic body

Claims (10)

In an optical pickup device comprising a lens facing an optical disc, and having a configuration capable of scanning by moving the lens in an inner circumferential direction and an outer circumferential direction of the optical disc.
A clamp motor for supporting a clamp for fixing the optical disk to a spindle motor that rotationally drives the optical disk, and a moving means for moving from the occupied area to a scanning area for the optical disk,
The optical pickup apparatus characterized in that the moving means positions the lens in an occupied area of the clamp holder when the optical disk is pulled out or at the end of writing or reproduction on the optical disk. The optical pickup device according to claim 1,
The optical pickup device according to claim 1, wherein the moving means sets the position of the lens within an occupied area of the clamp holder when the optical disk is not loaded when the tray on which the optical disk is loaded is pulled. The optical pickup device according to claim 1 or 2,
The moving means sets the position of the lens within the occupation area of the clamp holder when the optical disk is not mounted when performing an expected operation when the power is turned on. Pickup device.   An optical disc apparatus using the optical pickup device according to claim 1. The optical disc apparatus according to claim 4, wherein
The optical disc apparatus, wherein the clamp holder has a size capable of covering the entire optical pickup device when the optical pickup is located at the innermost peripheral position of the optical disc. As a scanning mechanism for the optical disk, an optical pickup actuator unit including a lens unit, a pickup housing unit holding the actuator unit and incorporating an optical component such as a semiconductor laser, and two rail shafts holding the pickup housing unit The pickup module unit, which holds the rail shaft, the spindle motor that is the optical disk rotation drive means, the seek motor that is the lens movement means, and the motor board, is fixed. A drawer unit, a lock mechanism for holding the entire drawer unit inside the drive housing, a mechanism for releasing the lock mechanism, an eject button unit for recognizing an eject operation, a circuit board on which an electronic component for signal processing is mounted, and an exterior component This is equipped with In each section an optical disk apparatus which is capable of drawer construction in the outside together with the optical disk,
An optical disc apparatus comprising: a configuration in which the lens can be covered by a protective portion provided at a position not facing the optical disc when an optical disc withdrawal command is issued. The optical disk apparatus according to claim 6, wherein
The optical disk apparatus according to claim 1, wherein the lens protection unit is provided on a part of the exterior component at a position outside the outermost peripheral position of the optical disk and projects over the lens. The optical disk apparatus according to claim 7, wherein
The protective portion of the lens includes a cover member imparted with a movement habit in a direction that can cover the upper side of the lens, and the cover member is moved toward the outer periphery of the optical disk by the seek motor. An optical disk apparatus, wherein the optical disk apparatus is configured to move to a position covering the upper side of the lens by being actuated at the time. The optical disk apparatus according to claim 8, wherein
The cover member is displaceable between a position covering the upper side of the lens and a position deviating from the upper side of the lens. Usually, the cover member is given a displacement behavior to a position deviating from the upper side of the lens and interferes with the pickup housing. An optical disc apparatus characterized in that the optical disc apparatus is sometimes displaced to a position covering the upper side of the lens against the displacement behavior. The optical disk device according to claim 8 or 9,
The cover member is composed of a single member that is rotatable with a fulcrum interposed therebetween, and a biasing member that provides a displacement behavior in a direction away from the upper side of the lens is provided at one rotation end with the fulcrum interposed therebetween, The other rotation end is a part that interferes with the pickup housing, and the other rotation end covers the upper side of the lens by rotating when the other one interferes with the pickup housing. An optical disc device characterized by the above.

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