JP2006185517A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To broadly secure a space from the bottom face of an equipment unit to a mother board in the inner part of a housing to allow the installation of high circuit parts on the mother board. <P>SOLUTION: A disk device 1 is provided with; a spindle motor 3 which rotates a turntable 4 which holds a disk 5; an optical pickup 10 which optically reads and writes information on the disk 5; a static charge eliminator 12 which generates an atmospheric ion for neutralizing and eliminating static electricity generated in the optical pickup 10; a plurality of nozzles which are connected to the static charge eliminator 12 and at least whose one tip is installed in the vicinity of a position where the optical pickup 10 stands by; and a control part 15 which controls the static charge eliminator 12 to blow out the atmospheric ion from the nozzles. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk device.

  2. Description of the Related Art Conventionally, a disc reproducing apparatus that stores and reproduces various disc-shaped information recording media (hereinafter simply referred to as “discs”) such as CD (Compact Disc) and DVD (Digital Versatile Disc) has been proposed and put into practical use. Yes.

  In such a disk device, static electricity is generated on the disk surface due to the rotation of the disk and the air in the disk device when the disk is played. In general, since a disk device requires a mechanism that allows the disk to be taken in and out, dust and dirt in the environment can easily enter the disk device. Therefore, when dust or dirt adheres to the surface of the disk due to static electricity generated during the reproduction of the disk, there is a problem that information recording to the disk and information reproduction from the disk cannot be performed accurately.

Therefore, in order to prevent the generation of static electricity on the disk surface, a disk device having a static eliminator provided with a nozzle that blows ionized compressed air onto the disk surface has been proposed (see Patent Documents 1 to 3).
JP-A-5-28740 JP-A-6-60606 JP-A-6-60630

  However, the static eliminators provided in the disk devices described in Patent Documents 1 to 3 are all for removing static electricity generated on the disk surface.

  On the other hand, an optical pickup for reading a disk is provided in the disk device, and static electricity is generated in this optical pickup due to friction with air when the disk rotates. Then, when dust or dirt in the disk device adheres due to static electricity, there is a problem that the optical properties of the optical pickup deteriorate.

  In particular, the objective lens provided in the optical pickup reads the signal of the disc directly with a laser beam, so it cannot be provided with a cover during playback of the disc, so it is exposed, so dust and dirt adhere to it. It was easy.

  In addition, the objective lens included in the optical pickup is mainly composed of a resin-based material that is electrically non-conductive, and it is easy to generate static electricity by friction with air.

  Furthermore, the optical pickup is often installed in an unreachable area in the disk device, so that it cannot be cleaned directly by humans, and if the performance deteriorates due to accumulation of dust or dirt, the product life of the optical pickup itself Sometimes it was judged.

  In addition, using an objective lens cleaner can only provide a temporary effect. On the other hand, applying friction will not only generate static electricity, but also apply a physical load to the optical pickup to improve performance. There was a risk of deterioration.

  The present invention has been made in view of the above points, and is intended to remove static electricity generated in an optical pickup that reads a disk to prevent dust and adhesion of dust, and to prevent deterioration of optical properties of the optical pickup. An object of the present invention is to provide a disk device that can be made available.

  In order to solve the above-mentioned problems, the invention described in claim 1 is a disk device, wherein a spindle motor that rotates a turntable that holds a disk, an optical pickup that optically reads and writes information on the disk, and A static eliminator that generates air ions for neutralizing and removing static electricity generated in the optical pickup, and a plurality of nozzles connected to the static eliminator and having at least one tip disposed near a standby position of the optical pickup And a control unit that controls the static eliminator and blows out air ions from the nozzle.

  According to a second aspect of the present invention, there is provided a disk apparatus according to the first aspect, comprising a base for fixing the spindle motor, and recording or reproducing the disk by controlling a flow of air ions on the surface of the base. A plurality of groove portions for sending air ions to the optical pickup at the time are formed, and holes for penetrating the base and inserting the tips of the plurality of nozzles are formed in the groove portions.

  According to a third aspect of the present invention, in the disk device according to the second aspect, when the recording or reproduction of the disk is not performed, the controller picks up the optical pickup from the nozzle of the static eliminator at a standby position. Air ions are blown onto the optical pickup, and air ions are sent from the nozzle of the static eliminator to the optical pickup through the groove when recording or reproducing the disk.

According to the present invention, it is possible to remove static electricity generated in the optical pickup provided in the disk device and prevent the adhesion of dust and dust without cleaning by human hands. As a result, the reliability at the time of recording or reproducing data on the disc is improved, and a product with high quality and long life can be obtained.
In particular, the objective lens provided in the optical pickup is always exposed at the time of reproduction of the disc and easily generates static electricity due to friction.According to the present invention, the static electricity is removed even at the time of recording and reproduction of the disc. It becomes possible to further improve the reliability of recording or reproduction of the disk 5 to obtain a product of high quality and long life.

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

  The disc device 1 according to the present embodiment is a device that optically reads and writes data such as music and video by applying a laser beam to a disc such as a CD or a DVD. As shown in FIG. 1, the disk device 1 is provided with a base 2 to which each component of the disk device 1 is attached.

  Below the base 2, a spindle motor 3 having a rotating shaft is arranged so that the rotating shaft passes through the vicinity of the center of the base 2. A turntable 4 that holds a disk 5 is fixed to the tip of the rotating shaft of the spindle motor 3. With such a configuration, the spindle motor 3 rotates the turntable 4 that holds the disk 5.

Further, as shown in FIGS. 1 and 2, a rectangular opening 8 is formed in the base 2. Further, a concentric groove 6 centering on the rotation axis of the spindle motor 3 is formed on the surface of the base 2 and below the disk 5 held by the turntable 4, and the end of the groove 6 is It extends to the opening 8 of the base 2. As for the depth dimension of the groove part 6, about 1-2 mm is preferable. In the present embodiment, six groove portions 6 are formed. However, infinitely fine groove portions 6 can be formed on the surface of the base 2.

  Each groove 6 is formed with a hole 7 penetrating the base 2. In this embodiment, one hole 7 is formed in one groove portion 6 so as to be aligned in a row in the radial direction of the disk 5. As shown in FIG. 3, in the vicinity of the surface of the base 2 where the groove 6 is formed, the diameter of the hole 7 is formed to be the same as the width dimension of the groove 6. The diameter of the hole 7 is formed to be slightly larger.

  As shown in FIGS. 1 and 2, two shafts 9 are parallel to the surface of the base 2 opposite to the surface on which the turntable 4 is fixed so that the two shafts 9 are along the longitudinal end of the opening 8. Is provided. A main shaft formed at one end of an optical pickup 10 that optically reads information recorded on the disk 5 is fixed to one shaft 9, and is formed at the other end of the optical pickup 10 on the other shaft 9. By engaging the engaging portion, the optical pickup 10 is attached along the shaft 9 so as to be capable of reciprocating in the radial direction of the disk. The optical pickup 10 is provided with an objective lens 11, a laser diode (not shown), and a photodetector (not shown). As shown in FIGS. 1 and 2, the optical pickup 10 is engaged. In a state where the portion is attached to the shaft 9, the surface provided with the objective lens 8 of the optical pickup 7 is exposed from the opening 8 of the base 2.

  As shown in FIG. 2, the surface of the base 2 opposite to the surface on which the turntable 4 is fixed is ionized air for neutralizing and removing static electricity (hereinafter referred to as “air ions”). Is provided. An air nozzle 13a and a plurality of air nozzles 13b are connected to the static eliminator 12, and an air outlet 14 is attached to the tip of the air nozzle 13a.

  The air nozzle 13a is inserted into a hole 7 formed in the vicinity of the standby position of the optical pickup 10 from the surface of the base 2 opposite to the surface on which the turntable 4 is fixed, and is attached to the tip of the air nozzle 13a. 14 is fixed near the standby position of the optical pickup 10. With such a configuration, air ions are blown from the blowout port 14 to the optical pickup 10 waiting at the standby position. In addition, dust and dirt adhering to the optical pickup 10 are blown away by air ions, and at the same time, reattachment due to electrostatic charging is prevented.

  On the other hand, the plurality of air nozzles 13 b are respectively inserted into holes 7 formed in the respective groove portions 6 of the base 2 from the surface of the base 2 opposite to the surface on which the turntable 4 is fixed. As shown in FIG. 4, by inserting the tip of the air nozzle 13 b into the hole 7, air ions blown from the air nozzle 13 b are sent from the hole 7 to the groove portion 6. Then, as shown in FIG. 5, the flow of air ions is controlled by the groove portion 6 extending to the opening portion 8 of the base 2, and the air ions are sent to the optical pickup 10 located inside the opening portion 8 of the base 2. It is supposed to be. With such a configuration, static electricity generated by the rotation of the disk 5 can be neutralized and removed, and adhesion of dust and dirt can be prevented. Further, when air ions are blown from the static eliminator 12 to the air nozzle 13b, it is possible to prevent the performance of the optical pickup 10 from being deteriorated by avoiding direct blowing of air ions to the optical pickup 10. Yes.

  Next, the control unit 15 in the present embodiment will be described with reference to FIG.

  As shown in FIG. 6, the disk device 1 includes a control unit 15 that executes various processes. A spindle motor 3, a servo control mechanism 16, and a static eliminator 12 are connected to the control unit 15 via an interface (not shown), and the control unit 15 drives and controls each of the above components. Yes.

  The control unit 15 drives and controls the spindle motor 3 during recording or reproduction of the disk 5 in accordance with an instruction signal from an input unit (not shown). In addition, the control unit 15 controls the servo control mechanism 16 so that the laser beam correctly strikes the pits on the surface of the disk 5 during recording or reproduction of the disk 5. Here, the servo control mechanism 16 is a tracking servo that moves and adjusts the position of the optical pickup 8 to adjust the position of the optical pickup 8 left and right in order to correctly apply the laser beam onto the pits on the surface of the disk 5 and moves the position of the optical pickup 8 up and down. A mechanism that controls the focus servo to adjust the focus. By this servo control mechanism 16, the optical pickup 10 is placed inside the opening 8 of the base 2 when the disk 5 is put in and out or when recording and reproduction processing is not performed, and in the vicinity of the outer periphery of the disk 5 in the shaft 9. The optical pickup 10 waits at the standby position. Further, at the time of recording or reproducing processing of the disk 5, the inner side of the opening 8 of the base 2 is moved along the shaft 9 toward the inner peripheral part of the disk 5.

  Further, the control unit 15 is configured to turn on / off the static eliminator 12 together with the power source of the disk device 1. It is also possible to control so that the disk 5 is turned on when installed on the turntable 4 and turned off when not installed.

  Further, when the disk 5 is inserted into the disk device 1 from an insertion port (not shown), the control unit 15 controls the static eliminator 12 to blow out air ions from the air nozzle 13a. As a result, when the disk 5 is not recorded / reproduced, air ions are directly blown from the outlet 14 to the optical pickup 10 waiting at the standby position.

  Further, when the spindle motor 3 starts to rotate, the control unit 15 controls the static eliminator 12 to stop blowing air ions from the air nozzle 13a and switch to blow air ions from the air nozzle 13b. ing. Thereby, during recording / reproduction of the disk 5, the flow of air ions blown out from the air nozzle 13 b is controlled by the groove 6 and sent to the optical pickup 10 located inside the opening 8 of the base 2.

  In the present embodiment, the static eliminator 12 is controlled to blow air ions from the air nozzle 13a when the disk 5 is not recorded / reproduced, and air ions are blown from the air nozzle 13b when the disk 5 is recorded or reproduced. In any case, the effect of the present invention can be obtained even if the air ions are blown from the air nozzles 13a and 13b.

  Next, the operation of the disk device 1 in this embodiment will be described.

  When the disk device 1 is turned on, the static eliminator 12 starts generating air ions.

  When the disk 5 is inserted into the disk device 1 from an insertion port (not shown), the control unit 15 controls the static eliminator 12 to blow out air ions from the air nozzle 13a.

  On the other hand, when the disk 5 is put in and out, or when recording and reproduction processing is not performed, the optical pickup 10 is on the inside of the opening 8 of the base 2 and waits for the optical pickup 10 near the outer periphery of the disk 5 in the shaft 9. Wait at the position.

  Therefore, when the static eliminator 12 is controlled and air ions are blown out from the air nozzle 13a, the air ions are directly blown from the air outlet 14 to the optical pickup 10 waiting at the standby position. As a result, dust or dirt attached to the optical pickup 10 is blown away by air ions, and at the same time, reattachment due to electrostatic charging is prevented.

  Further, the control unit 15 drives and controls the spindle motor 3 during recording or reproduction of the disk 5 in accordance with an instruction signal from an input unit (not shown). The spindle motor 3 rotates the disk 5 held by the turntable 4 as the turntable 4 is driven to rotate. Further, the control unit 15 controls the servo control mechanism 16 to move the optical pickup 10 along the shaft 9 toward the inner peripheral part of the disk 5 during recording or reproduction of the disk 5.

  On the other hand, when the spindle motor 3 starts to rotate, the control unit 15 controls the static eliminator 12 to stop blowing air ions from the air nozzle 13a and switch to blow air ions from the air nozzle 13b. Therefore, during recording / reproduction of the disk 5, the flow of air ions blown from the air nozzle 13 b is controlled by the groove 6 and sent to the optical pickup 10 located inside the opening 8 of the base 2. Thereby, the static electricity generated by the rotation of the disk 5 can be neutralized and removed without blowing air ions to the optical pickup 10.

  As described above, according to the disk device of the present embodiment, when the disk 5 is put in and out or when recording and reproduction processing is not performed, air ions are directly blown onto the optical pickup 10, so that dust attached to the optical pickup 10 At the same time that dust and the like are blown out by air ions, reattachment due to electrostatic charging can be prevented. Thereby, it is possible to prevent dust and dirt from adhering to the objective lens that irradiates the laser beam on the disk, and to prevent the optical properties of the optical pickup 10 from deteriorating.

  Further, during recording or reproduction processing of the disk 5, air ions are sent from the groove 6 to the optical pickup 10 to neutralize and remove static electricity generated by the rotation of the disk 5 and to prevent adhesion of dust and dirt. Can be prevented. Further, it is possible to prevent the performance of the optical pickup 10 from deteriorating by avoiding blowing air ions to the optical pickup 10 during the recording or reproducing process of the disk 5.

  As described above in detail, according to the present invention, it is possible to remove static electricity generated in the optical pickup 10 provided in the disk device 1 and prevent the adhesion of dust and dust without cleaning by human hands. Can do. Thereby, the reliability at the time of recording or reproducing the data of the disk 5 is improved, and a product of high quality and long life can be obtained.

  In particular, since the objective lens 11 provided in the optical pickup 10 is directly exposed to the disk 5 with a laser beam and is exposed at the time of reproducing the disk, it is easy to generate static electricity due to friction. In order to remove static electricity during reproduction, the reliability of recording or reproduction of the disk 5 can be further improved to obtain a product with high quality and long life.

  Further, since an objective lens cleaner or the like is not used, static electricity is not further generated due to friction, and a physical load is not applied to the optical pickup 10 to deteriorate performance.

  In the present embodiment, air ions are blown out from the nozzle 13a or the nozzle 13b both when the disk 5 is taken in and out, when recording and reproduction processing is not performed, and when the disk 5 is recorded and reproduced. However, even when the recording or reproducing process of the disk 5 is performed, air ions are not sent to the optical pickup 10 and the static electricity is discharged by blowing air ions only when the optical pickup 10 is in the standby position. The effect of can be obtained.

It is a section perspective view showing the composition of the disc device concerning the embodiment of the present invention. It is the figure which looked at the disk apparatus concerning the embodiment of the present invention from the back. It is sectional drawing which shows the structure of the disk apparatus based on embodiment of this invention. It is a fragmentary sectional view which shows the structure of the hole and groove part of the disc apparatus which concern on embodiment of this invention. It is a conceptual diagram showing control of the air ion by the groove part of the disc apparatus which concerns on embodiment of this invention. It is a block diagram which shows the control structure of the disc apparatus which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc apparatus 2 Base 3 Spindle motor 4 Turntable 5 Disc 6 Groove part 7 Hole 8 Opening part 9 Shaft 10 Optical pick-up 11 Objective lens 12 Electric discharger 13a, 13b Air nozzle
14 Air outlet 15 Control part

Claims (3)

A spindle motor that rotates a turntable that holds a disk;
An optical pickup that optically reads and writes information on the disc;
A static eliminator that generates air ions for neutralizing and removing static electricity generated in the optical pickup;
A plurality of nozzles connected to the static eliminator and having at least one tip installed near a standby position of the optical pickup;
A control unit for controlling the static eliminator and blowing out air ions from the nozzle;
A disk device comprising:   A base for fixing the spindle motor is provided, and a plurality of grooves are formed on the surface of the base to control the flow of air ions to send air ions to the optical pickup during recording or reproduction of the disk. The disk device according to claim 1, wherein a hole is formed through the base and into which tips of the plurality of nozzles are inserted.   The controller blows air ions from the nozzle of the static eliminator to the optical pickup at a standby position when the disk is not recorded or reproduced, and the groove from the nozzle of the static eliminator during recording or reproduction of the disk. The disk apparatus according to claim 2, wherein air ions are sent to the optical pickup through the disk device.

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