JP2006018915A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "disk drive" which can certainly switch movement of a head and power transmission to a conveyance roller with a single thread motor. <P>SOLUTION: When a pinion gearwheel 41 is driven by power of a thread motor M and a rack member 36 is moved to an inner periphery direction (Si), a limit switch SW1 is turned on. Further, transmission member 68 is turned to counterclockwise by a transmission convex 36c prepared in a rack member 36, and a switching member 65 is made to turn to clockwise. When a planetary gearwheel 63 prepared on this switching member 65 does not engage with a relay member 72 well, the thread motor M is reversed, an optical head 31 is moved in the outer periphery direction, the rack member 36 and the pinion gearwheel 41 are made to turn over, then the rack member 36 is moved to inner periphery direction to surely carry out the mode switching. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disk such as a CD and a DVD, a magneto-optical disk, or a disk device that clamps and rotates a magnetic disk, and in particular, a disk carrying operation is performed by the power of a sled motor that moves a head. Relates to the device.

  In an in-vehicle disk device or the like, when a disk is inserted into a housing in the insertion standby mode, the disk is transported by a transport roller, and the center of the disk is clamped to a rotation drive unit (turn table). In the disk drive mode for reproducing and recording on the disk, the disk is rotated by the rotation drive unit, and the head is moved along the recording surface of the disk by the thread motor, so that the data recorded on the disk is Data is read by the head or recorded on the disk by the head.

  In this type of disk device, it is necessary to separately provide a motor for moving the disk to the rotational drive unit by operating a conveying roller and the like, and a sled motor for moving the head along the recording surface of the disk. is there. For this reason, a plurality of motors are mounted, which increases the product unit price and the weight of the apparatus.

  In view of this, as described in Patent Document 1 below, it is conceivable to use a sled motor that moves the head to drive the transport roller.

In the device described in Patent Document 1 below, the optical head is moved by a sled motor in the disk drive mode. When the drive of the disk is completed, the optical head is moved to the inner circumference side of the disk, and the idler lock plate is pushed by the moving force, thereby releasing the moving force of the head by the sled motor and the power of the sled motor. Is transmitted to the disk transport roller.
Japanese Patent Application Laid-Open No. 11-195262

  In the conventional example, the number of motors can be reduced by configuring the sled motor so that the power of the sled motor can be transmitted to the conveying roller using the moving force when the sled motor moves toward the inner periphery of the disk.

  In the conventional example, the head is moved to the inner peripheral side of the disk and the idler plate is operated to switch the meshing between the gears, and the power of the thread motor is transmitted to the conveying roller. When the meshing is switched, depending on the rotational phase of the gear, there is a possibility that the gear teeth are in contact with each other and the gear does not mesh well. When such a phenomenon occurs, the transport roller does not start even if a predetermined time elapses after the head is moved to the inner circumference side of the disk by the sled motor and the idler plate is moved.

  Further, as a configuration different from the conventional example, a rack member that moves together with the head and a pinion gear that meshes with the rack member are provided, and the pinion gear is driven by a thread motor. In such a structure, when the rack member moves together with the head to the inner periphery of the disk, the power transmission path of the sled motor is transmitted to the transport roller by using the moving force. When switching so that power is transmitted to the roller, there is a case where the tooth of the gear hits and the power transmission path to the conveying roller is not formed.

  The present invention solves the above-mentioned conventional problems, and when the head and rack members are moved in one direction to switch the power of the sled motor to the power transmission path to the transport roller, the meshing of the gears is reliably realized. An object of the present invention is to provide a disc device that can be used.

The present invention includes a rotational drive unit (22) for rotationally driving a disk (D), a head (31) supported so as to be reciprocatingly opposed to the recording surface of the disk (D), and the head (31). A rack member (36) that moves, a pinion gear (41) that meshes with the rack member (36), and a moving force that loads the disk (D) into the rotation drive unit (22) or the rotation drive unit (22 Disc drive means (28) for providing a moving force to be discharged from
A first transmission path for supplying power of the thread motor (M) to the rack member (36) via the pinion gear (41) and a second transmission path for supplying power to the disk transport means (28). A switching member (65) for switching to the transmission path;
With the switching to the first transmission path, the switching member (65) is moved by the moving force when the head (31) moves in the first direction by the power of the sled motor (M). A transmission member (68) for switching to the second transmission path;
When the head (31) is moved in the second direction by the power of the sled motor (M) while being switched to the first transmission path, the sled motor (M) is moved by the moving force. And idling means for idling the transmission of power from the rack member (36) to the rack member (36),
After the detection member (SW1) detects that the head (31) has moved in the first direction, the thread (M) causes the head ( 31) is moved in the second direction so as to operate the idling means.

  In the disk device, when the head is moved in the first direction and the power transmission path to the disk conveying means is not normally formed, the head is moved in the second direction, and the head is further moved in the first direction. By moving to, a power transmission path to the disc transport means can be reliably formed.

  In the present invention, a second detection member (SW2) for detecting that the switching member (65) has been switched to the second transmission path is provided, and a predetermined value is detected after detection by the detection member (SW1). When the second detection member (SW2) does not operate within the time, the head (31) is moved in the second direction.

  In the present invention, by operating the idling means, the moving position of the rack member (36) and the rotational phase of the gear (63) provided on the switching member (65) are changed, and then the rack member (36) is moved. When the member (36) moves in the first direction, the gear (63) can be reliably meshed with the second transmission path.

  In the means, the head is moved in the second direction, so that when the head is moved in the first direction thereafter, the gears are surely engaged and the power can be transmitted to the disk transport means.

  For example, in the present invention, the idling means releases the meshing between the rack member (36) and the pinion gear (41).

  More specifically, at least one of the rack teeth (37) of the rack member (36) and the teeth of the pinion gear (41) is inclined with respect to an orthogonal line orthogonal to the moving direction of the rack member (36). The formed rack member (36) is rotatable about a movement line extending in the movement direction as a fulcrum, and when the movement force in the second direction acts on the rack member (36). Further, the rack member (36) and the pinion gear (41) are disengaged from each other.

In the present invention, a biasing member (38) for biasing the rack member (36) in the second direction is provided between the head (31) and the rack member (36). ,
When the head (31) moves in the first direction, the switching member (65) can move the rack member (36) to a position away from the pinion gear (41).

  The present invention also includes a sun gear (46) driven by the thread motor (M), a planetary gear (63) meshing with the sun gear (46), and a relay member (72) meshing with the planetary gear (63). The switching member (65) is connected to the first transmission path and the second by the rotational force of the planetary gear (63) when the planetary gear (63) meshes with the relay member (72). It is useful in those that can be switched to other transmission paths.

  The means can prevent the meshing failure between the planetary gear and the relay member from occurring by changing the meshing phase between the rack member and the pinion gear by the idling means.

  In the present invention, the rack member and the head are moved by the sled motor, and the power of the sled motor is switched to the transmission path to the disk transport means, so that the transmission path can be reliably formed.

  1 to 12 show a disk device according to a first embodiment of the present invention. 1 is an exploded perspective view of the drive unit, FIGS. 2 to 5 show a state in which the drive unit is housed in the outer case 1A, FIG. 2 and FIG. 4 are side views, and FIG. 3 and FIG. FIG. 6 to 9 show the mode switching device provided in the drive unit according to the operation, and are bottom views of the lower chassis 11 shown in FIG. 10 to 12 are partially enlarged views of the bottom view. 13 is a partial bottom view showing a state in which the head and the rack member have moved to the outer peripheral side of the disk, FIG. 14 is a cross-sectional view taken along the line abcd of FIG. 13, and FIG. 15 is a block diagram of the control circuit. FIG. 16 is a flowchart of the control operation.

  As shown in FIG. 2, the disk device 1 is for in-vehicle use, and an outer case 1A is formed by assembling an upper housing 2 and a lower housing 3 into a box shape. The outer case 1A has a front end surface on the Y2 side, and an insertion / discharge port 9 through which the disk D is inserted and discharged is opened on the front end surface.

  The drive unit 10 is accommodated in the outer case 1A. As shown in FIG. 1, the drive unit 10 is a combination of a lower chassis 11 and an upper chassis 12.

  As shown in FIGS. 1 and 3, the lower chassis 11 is provided with a turntable 22. A spindle motor 26 is fixed to the lower surface of the lower chassis 11, and a drive shaft 26a projects above the lower chassis 11, and the turntable 22 is fixed to the drive shaft 26a. The turntable 22 and the spindle motor 26 constitute a rotation drive unit.

  As shown in FIGS. 1 and 3, the upper chassis 12 is provided with a clamper 23. The clamper 23 is rotatably supported at the tip of the clamp arm 24. The clamp arm 24 is supported by the upper chassis 12 so that the base end portion on the Y1 side is rotatable, and the clamp arm 23 is always urged clockwise by the urging spring 25, that is, in the direction in which the clamper 23 is lowered. Has been.

  As shown in FIG. 1, support pins 4 and 4 are fixed to the left and right sides of the Y1 side of the lower chassis 11, and the damper 5 fixed to the upper housing 2 is connected to the damper 5 as shown in FIG. The support pins 4 and 4 are elastically supported. A support pin 6 is also fixed to the Y2 side of the upper chassis 12, and this support pin 6 is elastically supported by a damper 7 fixed to the upper housing 2 as shown in FIG.

  The dampers 5 and 7 are fluids such as oil sealed in flexible bags such as rubber. When driving a disk, the drive unit 10 is elastically supported by the dampers 5 and 7 so that even if external vibration such as vehicle body vibration is applied, the vibration is not directly transmitted to the disk being driven and reproduced. It is possible to prevent the occurrence of sound skipping.

  As shown in FIG. 1, connecting shafts 13 and 13 are fixed to both sides of the lower chassis 11 on the Y2 side, and the connecting shafts 13 and 13 are connected to both sides of the upper chassis 12. The holes 14 and 14 are rotatably inserted. As a result, as shown in FIGS. 2 to 5, the lower chassis 11 can rotate with respect to the upper chassis 12 using the connecting shafts 13 and 13 as fulcrums.

  Since the connecting shafts 13 and 13 are provided in front of the lower chassis 11 (Y2), the lower chassis 11 can rotate so that the rear end moves up and down with the front end as a fulcrum. .

  As shown in FIG. 1, a switching slider 15 is supported on the side of the lower chassis 11 on the X2 side so as to be linearly slidable in the Y1-Y2 direction. It is fixed. Inclined holes 17 are formed on both sides of the upper chassis 12 so as to incline downward toward the rear (Y1 direction), and the switching shaft 16 is slidably inserted into the inclined holes 17. ing.

  As shown in FIG. 1, lock members 18 and 18 are provided on the left and right sides of the upper chassis 12. Support holes 18a and 18a are formed in the lock members 18 and 18, and the support holes 18a and 18a are inserted into support shafts 19 and 19 provided on the left and right side surfaces of the upper chassis 12, so that the upper chassis On the side surfaces of the twelve, the lock members 18 are rotatably supported.

  As shown in FIGS. 1 and 2, the locking members 18, 18 are formed with elongated holes 18b, 18b. Lock shafts 21 and 21 are fixed slightly behind the support shafts 13 and 13 on the left and right sides of the lower chassis 11, and the lock shafts 21 and 21 are inserted into the long holes 18b and 18b. Yes.

  2 and 3 show a disc insertion standby mode after the disc is ejected. In this mode, the switching slider 15 provided in the lower chassis 11 has moved to the end in the Y1 direction. At this time, the switching shaft 16 provided on the switching slider 15 moves to the rear end of the inclined hole 17 formed in the side plate of the upper chassis 12, and the lower chassis 11 moves the connecting shaft 14. As a fulcrum, the rear portion is inclined so as to be separated downward from the upper chassis 12.

  Since the lower chassis 11 is inclined so that the rear portion is lowered, the lock member 18 is rotated counterclockwise by the lock shaft 21 provided in the lower chassis 11 as shown in FIG. As a result, the front end 18c of the lock member 18 is pressed against the lower surface of the upper housing 2, the rear end 18d of the lock member 18 is pressed against the upper surface of the lower housing 3, and the drive unit 10 It will be in the state locked with respect to the housing | casing 3. FIG.

  In this insertion standby mode, as shown in FIG. 3, the turntable 22 provided in the lower chassis 11 descends away from the clamper 23, and a sufficient gap is formed between the turntable 22 and the clamper 23. The

  When insertion of the disk D is detected, a switching slider 15 provided in the lower chassis 11 is moved in the Y2 direction by a mode switching device 30 described later. At this time, as shown in FIG. 4, the switching shaft 16 provided in the switching slider 15 moves in the inclined hole 17 formed in the upper chassis 12 toward the front end. Therefore, as shown in FIG. 5, the lower chassis 11 rotates clockwise with the connecting shaft 13 as a fulcrum, and the disc is formed by the turntable 22 provided in the lower chassis 11 and the clamper 23 provided in the upper chassis 12. The periphery of the center hole Da of D is clamped.

  Further, as shown in FIG. 4, since the lock shaft 21 provided in the lower chassis 11 is raised, the lock member 18 is rotated clockwise around the support shaft 19, and the front end 18 c of the lock member 18 is moved. Is separated from the upper casing 2, and the rear end 18 d of the locking member 18 is separated from the lower casing 3. Therefore, the drive unit 10 is unlocked and is elastically supported by the dampers 5 and 7 in the outer case 1A.

  As shown in FIG. 2, a roller arm 27 is provided in front of the upper chassis 12. The front end of the roller arm 27 is rotatably supported on the upper chassis 12 by a support shaft 27a. On the rear end portion of the roller arm 27, a roller shaft 28a of a conveying roller 28 constituting a disk conveying means is rotatably supported. A control hole 18e is formed at the front end of the lock member 18, and the roller shaft 28a is inserted into and supported by the control hole 18e.

  In the insertion standby mode shown in FIGS. 2 and 3, since the lock member 18 is rotated counterclockwise, the roller shaft 28a is lifted by the control hole 18e. In this state, when the disk D is inserted in the Y1 direction from the insertion / ejection port 9 of the outer case 1A, the disk D is sandwiched between the transport roller 28 and a sliding member (not shown) opposed thereto, The disk D is conveyed in the Y1 direction. Alternatively, the disc on which recording or reproduction driving has been completed is discharged from the insertion / discharge port 9 by the transport force of the transport roller 28.

  On the other hand, in the disk drive mode shown in FIGS. 4 and 5, since the lock member 18 is rotated in the clockwise direction, the roller shaft 28a is lowered by the control hole 18e formed in the lock member 18, and the transport roller 28 is separated from the disk D clamped to the turntable 22.

  As shown in FIG. 4, a mode detection switch SW2 serving as a second detection member is provided at the end of the upper chassis 12 on the Y2 side. As shown in FIG. 4, when the roller arm 27 rotates counterclockwise, the mode detection switch SW2 is turned on by the front end portion 27b of the roller arm 27. That is, the control unit shown in FIG. 15 can recognize that the disc drive mode has been set by completing the clamping of the disc D by detecting that the mode detection switch SW2 is turned on.

  6 to 9 are bottom views of the lower unit 11 of the drive unit 10 as viewed from the lower side. The lower unit 11 is reversed from side to side from the state shown in FIG. It corresponds to. 6 to 9, the right side in the figure is the X2 direction, the left side in the figure is the X1 direction, and the Y2 direction in which the insertion / exit port 9 is located is directed downward in the figure.

  6 to 9, the connecting shaft 13 and the lock shaft 21 protrude from the right side surface of the lower chassis 11. The switching slider 15 is supported on the X2 side of the lower surface of the lower chassis 11 so that it can slide linearly in the Y1-Y2 direction. The switching shaft 16 is fixed to the switching slider 15. The switching shaft 16 moves in the Y1-Y2 direction together with the switching slider 15. A support portion 15a is provided at the end of the switching slider 15 on the Y1 side, and a support portion 11a is also provided on the lower surface of the lower chassis 11. A reversing spring 29 is provided between the support portions 15a and 11a. It is hung.

  In the insertion standby mode of FIG. 6, the switching slider 15 is moved in the Y1 direction, the urging force of the reversing spring 29 acts on the switching slider 15 in the Y1 direction, and the switching slider 15 is moved in the Y1 direction. The position is stable. In the disk drive mode shown in FIG. 9, the switching slider 15 moves in the Y2 direction. At this time, the urging direction is switched to the Y2 direction by the reversing spring 29, and the switching slider 15 is stabilized at the second position moved in the Y2 direction.

  A mode switching device 30 that controls the movement of the switching slider 15 is provided on the lower surface of the lower chassis 11. The mode switching device 30 includes a sled power transmission path (first transmission path) for moving the optical head 31 with power from the sled motor M, and a power transmission path to the conveying roller 28 by moving the switching slider 15. (Second transmission path).

  Various gears are provided in FIGS. 6 to 9 show the details of the tooth shape of the various gears that need to be explained about the meshing, but the details of the gears that do not need to be explained are only drawn by pitch circles. The illustration of a simple structure is omitted.

  As shown in FIG. 1, a window 11 b is opened in the lower chassis 11. An optical head 31 is provided on the lower surface of the lower chassis 11, and the optical head 31 is exposed from the window 11 b toward the upper surface of the lower chassis 11. An objective lens 31 a is provided on the upper surface of the optical head 31. Inside the optical head 31, a light emitting element for applying laser light to the objective lens 31a, a light receiving element for receiving reflected return light from the disk D, and other optical elements are incorporated.

  On the lower surface of the lower chassis 11, a guide shaft 32 and a guide portion 33 that are inclined and extend in both the X direction and the Y direction are arranged in parallel to each other. As shown in FIG. 6, bearings 34 a and 34 b are formed on one side of the optical head 31 with a gap in the moving direction, and the bearings 34 a and 34 b slide on the guide shaft 32. It is extrapolated freely. A bifurcated sliding portion 35 is formed on the other side portion of the optical head 31, and the sliding portion 35 is slidably fitted so as to sandwich the guide portion 33. Therefore, the optical head 31 is guided by the guide shaft 32 and the guide portion 33 and is movable in the inner circumferential direction Si and the outer circumferential direction So of the disk D. In this embodiment, the inner circumferential direction Si is the first direction, and the outer circumferential direction So is the second direction.

  The optical head 31 is provided with a rack member 36 so that it can move together. The rack member 36 has rack teeth 37 formed in a predetermined range in the longitudinal direction. Bearing portions 36 a and 36 b are formed in the rack member 36 at intervals in the moving direction of the optical head 31. One bearing portion 36 a is positioned between the bearing portion 34 a and the bearing portion 34 b of the optical head 31 and is slidably inserted on the guide shaft 32.

  A compression spring 38 is provided between the bearing portion 34 b of the optical head 31 and the bearing portion 36 a of the rack member 36, and the compression spring 38 is extrapolated to the guide shaft 32. The compression spring 38 is interposed between the bearing portion 36a and the bearing portion 34b in a state compressed from a free length, and the repulsive force causes the bearing portion 36a and the entire rack member 36 to move in the outer circumferential direction (first order). (Direction 2) is biased to So. In FIG. 6, since the rack member 36 is pulled in the inner circumferential direction (first direction) Si with respect to the optical head 31, the bearing portion 36a is separated from the bearing portion 34a. When the force that separates the members 36 from each other is not acting, as shown in FIG. 9, the bearing portion 36a is brought into close contact with the bearing portion 34a by the elastic force of the compression spring 38, and the optical head 31 and the rack member 36 are They can move together in the So-Si direction.

  Further, the bearing portions 36a and 36b provided on the rack member 36 are slidably and rotatably inserted with respect to the guide shaft 32. Therefore, the rack member 36 is supported so as to be rotatable about a movement line extending in the movement direction of the optical head 31 and the rack member 36, that is, around the axis center line of the guide shaft 32. The compression spring 48 also functions as a torsion spring. As shown in FIG. 14, one arm 36 a of the compression spring 48 is hung on the rack member 36, and the other arm 36 b is the optical head 31. It is hung on. Therefore, the rack member 36 is urged clockwise in FIG. 14 (α1 direction).

  On the side of the rack member 36, a shaft 43 is fixed to the lower surface of the lower chassis 11, and the pinion gear 41 and the transmission gear 42 are supported on the shaft 43 so as to rotate together. 6 to 8, the rack teeth 37 are separated from the pinion gear 41. However, when the rack member 36 moves in the outer circumferential direction So, as shown in FIGS. 9 and 13, the rack teeth 37 and the pinion gear 41 Can be engaged with each other.

  FIG. 14 shows a tooth tip 41 a and a tooth root 41 b of the pinion gear 41. The tooth tip 41a and the tooth root 41b are formed so as to be gradually inclined in the clockwise direction from the shaft tip portion of the shaft 43 toward the lower chassis 11. In FIG. 14, the inclination angle of the tooth tip 41 a and the tooth root 41 b is indicated by θ with respect to an orthogonal line orthogonal to the moving direction of the rack member 36. Alternatively, the tooth tip 41 a and the tooth base 41 b are formed in a spiral shape so as to turn clockwise as it goes to the lower chassis 11.

  As shown in FIG. 14, the rack teeth 37 of the rack member 36 are elastically pressed against the tooth tips 41 a and the tooth base 41 b of the pinion gear 41 by the function of the compression coil spring 47 as a torsion spring. . Therefore, the occurrence of backlash between the pinion gear 41 and the rack teeth 37 is suppressed.

  Further, an idling means is configured between the rack teeth 37 and the pinion gear 41. As shown in FIG. 13, the pinion gear 41 rotates clockwise, the rack member 36 is given a moving force in the outer peripheral direction So, and the optical head 31 hits the stopper portion 11 d of the lower chassis 11. When the pinion gear 41 is further rotated in the clockwise direction, as shown in FIG. 14, the rack member 36 is rotated in the α2 direction by being guided by the tooth tip 41a and the tooth base 41b inclined by the angle θ. Thus, the rack teeth 37 are disengaged from the tooth tips 41a and the tooth roots 41b, so that the pinion gear 41 can idle in the clockwise direction.

  The idling means can also be configured by inclining the rack teeth 37 of the rack member 36 with respect to the orthogonal line in the moving direction.

  As shown in FIGS. 6 to 9 and FIG. 13, a limit switch SW <b> 1 that is a first detection member is provided on the lower surface of the lower chassis 11. As shown in FIGS. 6, 7, and 8, when the optical head 31 reaches the movement end position in the inner circumferential direction Si, the limit switch SW <b> 1 is switched ON by the optical head 31. As shown in FIGS. 9 and 13, when the optical head 31 moves from the movement end position toward the outer peripheral direction So, the optical head 31 moves away from the limit switch SW1, and the limit switch SW1 is turned off. Is switched to.

  At the side of the transmission gear 42, a shaft 44 is fixed to the lower surface of the lower chassis 11, and a drive gear 45 and a sun gear 46 are supported on the shaft 44 so as to rotate together. The sun gear 46 meshes with the transmission gear 42, and the drive gear 45 meshes with a worm gear 47 provided on the output shaft of the sled motor M fixed to the lower chassis 11.

  In this embodiment, a path from the worm gear 47 to the drive gear 45, the sun gear 46, the transmission gear 42, the pinion gear 41, and the rack teeth 37 is a thread power transmission path (first transmission path).

  As shown in FIG. 6, a meshing member 51 is superimposed on the switching slider 15. The meshing member 51 is combined with the switching slider 15 so that it can move slightly in the Y direction. Rack teeth 52 extending in the Y direction are formed on the side surface of the meshing member 51 facing the X1 side. On the other hand, as shown in FIG. 9 for a while, rack teeth 53 extending in the Y direction are also formed on the switching slider 15. The rack teeth 52 and the rack teeth 53 are formed of the same module. In the state shown in FIG. 6, the rack teeth 53 formed on the switching slider 15 and the rack teeth 52 formed on the meshing member 51 overlap. .

  A rectangular notch 51a extending in the Y direction is formed in the meshing member 51, and a compression spring 54 is accommodated in the notch 51a. The compression spring 54 is installed in a compressed state, and the engagement member 51 is always urged in the Y1 direction on the switching slider 15 by the compression spring 54. In the state shown in FIG. 6, no external force is applied to the meshing member 51, and the meshing member 51 is combined on the switching slider 15 while moving in the Y1 direction. When the meshing member 51 is moved in the Y2 direction from the state of FIG. 6, the meshing member 51 can move by a slight distance in the Y2 direction on the switching slider 15 against the elastic force of the compression spring 54. It is like that.

  A shaft 56 is fixed to the lower surface of the lower chassis 11 on the X2 side, and a pinion gear 57 and a transmission gear 58 are supported on the shaft 56 so as to rotate together. In FIG. 6, the pinion gear 57 and the rack teeth 52 and 53 are separated from each other. However, when the switching slider 15 and the meshing member 51 are moved in the Y2 direction as shown in FIGS. However, it can mesh with both the rack teeth 52 provided on the meshing member 51 and the rack teeth 53 (see FIG. 9) provided on the switching slider 15.

  On the side of the transmission gear 58, a shaft 59 is fixed to the lower chassis 11, and the intermediate gear 61 and the intermediate gear 62 are supported on the shaft 59 so as to be rotated together. One intermediate gear 62 is always meshed with the transmission gear 58.

  A planetary gear 63 meshes with the sun gear 46. 6 to 8, the planetary gear 63 meshes with the intermediate gear 61. In this state, a switching power transmission path from the worm gear 47 to the drive gear 45, the sun gear 46, the planetary gear 63, the intermediate gear 61, the intermediate gear 62, the transmission gear 58, the pinion gear 57, and the rack teeth 52 and 53. Is formed.

  In the mode switching device 30, a fan-shaped switching member 65 is rotatably supported on the shaft 44, a shaft 64 is fixed to the switching member 65, and the planetary gear 63 is rotatable on the shaft 64. It is supported. The switching member 65 has a circumferential portion 65a along an arc having a predetermined radius centered on the shaft 64, and a locking portion 65b extending in the radial direction from the end of the circumferential portion 65a.

  As shown in FIGS. 6 and 10 to 12, a shaft 67 is fixed between the movement path of the rack member 36 and the switching member 65, and the transmission member 68 is rotatably supported on the shaft 67. Has been. A transmission recess 68 a is formed at one end of the transmission member 68. The rack member 36 is integrally formed with a transmission convex portion 36c, and the transmission convex portion 36c is fitted into the transmission concave portion 68a in the process of moving the rack member 36 in the inner circumferential direction (first direction) Si. Can be combined.

  As shown in FIGS. 10 to 12, the switching member 65 is formed with a cam portion 71. The cam portion 71 is a cam groove or a cam hole, and a transmission shaft 69 fixed to the other end of the transmission member 68 is slidably inserted into the cam portion 71. As shown in FIG. 12, the cam portion 71 has a switching portion 71a and a holding portion 71b formed continuously. The switching portion 71a extends in the radial direction about the shaft 44. The holding portion 71b has an arc shape. FIG. 12 shows a state in which the transmission member 68 is rotated clockwise and the switching member 65 is rotated counterclockwise. In the state shown in FIG. 12, the center line of the holding portion 71b is It is formed along an arc locus having a constant radius R with respect to the center of the shaft 67.

  As shown in FIG. 6, a relay member 72 fixed to the lower chassis 11 is provided outside the circumferential portion 65 a of the switching member 65. In the relay member 72, two teeth that mesh with the teeth of the planetary gear 63 are formed toward the moving path of the planetary gear 63. As shown in FIG. 8 to FIG. 9 and FIG. 10 to FIG. 12, the teeth of the planetary gear 63 can mesh with the teeth of the relay member 72 while the planetary gear 63 moves.

  A shaft 73 is fixed to the lower chassis 11 between the switching member 65 and the switching slider 15, and a restraining member 74 is rotatably supported on the shaft 73. A hook 74a is integrally formed at the left end of the restraining member 74, and a contact portion 74b is formed at the right end. The restraining member 74 is always urged clockwise by the urging member 75.

  On the side of the switching slider 15 on the X1 side, a restricting portion 15b linearly extending in the Y direction as the moving direction is formed, and at the end of the restricting portion 15b on the Y1 side, the restricting portion is formed. A restriction releasing portion 15c that is recessed from 15b in the X2 direction is formed. In the insertion standby mode shown in FIG. 6, the contact portion 74b of the restraining member 74 abuts on the restricting portion 15b, and the clockwise rotation of the restraining member 74 is restricted. At this time, the hook 74a of the restraining member 74 is engaged with the locking portion 65b of the switching member 65, and the turning of the switching member 65 in the counterclockwise direction is restrained.

  As shown in FIGS. 8 and 9, when the switching slider 15 moves in the Y2 direction and the restricting portion 15b is disengaged from the contact portion 74b, the restraining member 74 is rotated clockwise by the urging force of the urging member 75. Rotate. Then, the hook 74a is disengaged from the locking portion 65b, and the restraint of the switching member 65 is released.

  As shown in FIG. 1 and FIG. 6, a transmission gear 81 is rotatably provided at the tip of the side plate on the X2 side of the lower chassis 11 on the Y2 side. A roller gear 28c is provided at the end of the conveying roller 28. In the insertion standby mode in which the conveying roller 28 is lifted as shown in FIG. 2, the roller gear 28c and the transmission gear 81 are engaged with each other, With the rotational force of the transmission gear 81, the transport roller 28 can be driven to rotate in both forward and reverse directions.

  As shown in FIG. 6, in the lower chassis 11, the transmission gear 81 and a bevel gear 82 integrated therewith are rotatably supported. The lower chassis 11 is provided with a bevel gear 84 rotatably supported by a shaft 83, and the bevel gear 82 and the bevel gear 84 are always meshed with each other. A shaft 85 is fixed to the lower chassis 11, and a relay gear 86 is rotatably supported on the shaft 85. A spur gear is integrally formed with the bevel gear 84, and the spur gear and the relay gear 86 are always meshed with each other.

  A switching gear 87 is provided between the transmission gear 58 and the relay gear 86. In the insertion standby mode shown in FIG. 6, the switching gear 87 is engaged with both the transmission gear 58 and the relay gear 86. At this time, a roller driving force transmission path (second transmission path) is formed from the transmission gear 58 through the switching gear 87, the relay gear 86, the bevel gear 84, the bevel gear 82, the transmission gear 81, and the roller gear 28c. It is formed.

  A switching arm 88 is rotatably supported on the shaft 56 that supports the transmission gear 58. The switching gear 87 is rotatably supported on a shaft 89 fixed to one end of the switching arm 88, and the switching gear 87 can move around the transmission gear 58 in a planetary motion. The other end of the switching arm 88 extends to a position where it overlaps the switching slider 15, and a switching pin 91 is fixed to the other end.

  As shown in FIG. 6, a switching cam portion 92 is formed on the switching slider 15. The switching cam portion 92 is a cam groove or a cam hole, and the switching pin 91 is slidably inserted into the switching cam portion 92.

  The switching cam portion 92 is formed with an engaging portion 92a extending obliquely at an end portion on the Y2 side, and a separating portion 92b extending linearly along the moving direction of the switching slider 15 is formed on the Y1 side thereof. Has been.

  In the insertion standby mode shown in FIG. 6, since the switching slider 15 is moved in the Y1 direction, the switching arm 88 is rotated counterclockwise by the meshing portion 92a, and the switching gear 87 is connected to the transmission gear 58. The relay gear 86 is engaged with both sides. As shown in FIGS. 8 and 9, when the switching slider 15 moves in the Y2 direction, the switching arm 88 is rotated clockwise by the separating portion 92b, and the switching gear 87 is separated from the relay gear 86. The roller driving force transmission path transmitted from the transmission gear 58 to the roller gear 28c is interrupted.

  As shown in FIG. 1, the upper chassis 12 is provided with a detection member 94. In FIG. 6, the detection member 94 is indicated by a broken line, but the detection member 94 is rotatably supported by a shaft 95 fixed to the lower surface of the upper chassis 12. A detection pin 96 is fixed to one end of the detection member 94. The detection pin 96 is located in the carry-in path of the disk D inserted from the insertion / ejection port 9, and the center hole Da of the disk D conveyed by the conveyance roller 28 is formed in the turntable 22 as shown in FIG. When the matching position is reached, the detection pin 96 is pushed at the edge of the disk D on the Y1 side.

  A trigger pin 97 is fixed to the other end of the detection member 94. As shown in FIG. 6, the trigger pin 97 passes through the circular arc hole 11 c formed in the lower chassis 11 and extends to the lower surface of the lower chassis 11, and the trigger pin 97 is connected to the engagement member 51. It faces the position where the end face on the Y1 side can be pressed.

  As shown in FIG. 15, the disk device 1 is provided with a control unit 101 having a CPU, a memory, and the like. The motor driver 102 is controlled by the control unit 101, and the thread motor M is driven by the motor driver 102. Further, a switching signal for the limit switch SW1 as the first detection member and a switching signal for the mode detection switch SW2 as the second detection member are given to the control unit 101.

Next, the operation of the disk device 1 according to the first embodiment will be described.
(Insertion standby mode)
As shown in FIG. 6, the insertion standby mode is when the switching slider 15 is at the first position moved to the end in the Y1 direction.

  In FIG. 6, the switching slider 15 is urged in the Y1 direction by the reversing spring 29 and is stable at that position, and the rack teeth 53 formed on the switching slider 15 and the rack teeth 52 formed on the meshing member 51. Are both away from the pinion gear 57.

  The restraint member 74 is pivoted counterclockwise with the abutment portion 74b abutting against the regulation portion 15b formed on the switching slider 15, and the restraint member 74 is restrained from rotating clockwise at that position. Has been. Further, the hook 74a of the restraining member 74 is latched by the latching portion 65b of the switching member 65, so that the switching member 65 is restrained from rotating counterclockwise.

  In the insertion standby mode shown in FIG. 6, the switching member 65 is held by the hook 74a at the transmission position rotated clockwise as described above, and the planetary gear 63 is held in mesh with the intermediate gear 61. ing. Further, since the transmission member 68 is rotated counterclockwise by the clockwise rotation operation of the switching member 65, the rack member 36 is moved in the inner circumferential direction (first direction by the rotational force of the transmission member 68. ) Pulled in the Si direction, the compression spring 38 contracts, and the bearing portion 36a of the rack member 36 is separated from the bearing portion 34a of the optical head 31. Therefore, the rack teeth 37 of the rack member 36 are separated from the teeth of the pinion gear 41.

  In the insertion standby mode shown in FIG. 6, the switching pin 91 of the switching arm 88 provided so as to be rotatable about the shaft 56 enters the engaging portion 92 a of the switching cam portion 92 provided on the switching slider 15. The switching arm 88 is rotated counterclockwise. Therefore, the switching gear 87 supported by the switching arm 88 meshes with both the transmission gear 58 and the relay gear 86.

  Thus, in the insertion standby mode, the pinion gear 41 and the rack teeth 37 are not meshed, and the pinion gear 57 and the rack teeth 52 and 53 are not meshed. Therefore, the power transmission path of the thread motor M includes the worm gear 47, the drive gear 45, the sun gear 46, the planetary gear 63, the intermediate gears 61 and 62, the transmission gear 58, the switching gear 87, the relay gear 86, and the bevel gear. 84, the roller drive transmission path (second transmission path) transmitted to the bevel gear 82 and the transmission gear 81.

  In the insertion standby mode, since the switching slider 15 and the switching shaft 16 are moved in the Y1 direction, as shown in FIGS. 2 and 3, the lower chassis 11 is rotated so that the rear portion is lowered with the connecting shaft 13 as a fulcrum. As a result, the turntable 22 is separated from the clamper 23. Further, as shown in FIG. 2, the lock member 18 is rotated counterclockwise by a lock shaft 21 provided in the lower chassis 11, and the front end 18c of the lock member 18 hits the upper housing 2 and the rear end 18d. Is in a state where it hits the lower housing 3 and is locked so that the drive unit 10 does not move in the outer case 1A.

  Further, the conveyance roller 28 is lifted by the control hole 18e of the lock member 18, and the conveyance roller 28 is set at a position where power can be transmitted to the disk D. At the end of the conveyance roller 28 as shown in FIG. The provided roller gear 28 c meshes with the transmission gear 81. At this time, as shown in FIG. 2, the front end portion 27b of the roller arm 27 is separated from the mode detection switch SW2, and the mode detection switch SW2 as the second detection member is OFF.

  Therefore, when the sled motor M is driven in the insertion standby mode, the rack member 36 and the switching slider 15 do not move together, and the relationship between the drive unit 10 and the outer case 1A is maintained in the state shown in FIGS. Only the transport roller 28 is driven to rotate. In this state, when the sled motor M is driven in one direction, the transport roller 28 is driven in the direction of introducing the disk, and the disk D inserted from the insertion / ejection port 9 is transported in the Y1 direction. When the sled motor M is driven in the other direction, the transport roller 28 is driven in the direction of ejecting the disk, and the disk D released from the clamp on the turntable 22 is directed toward the insertion / discharge port 9 by the rotational force of the transport roller 28. Discharged.

(Switching from insertion standby mode to disk drive mode)
In the insertion standby mode shown in FIGS. 2, 3 and 6, when a disk is inserted from the insertion / ejection port 9 and detected by an insertion detection means (not shown), the thread motor M is driven. At this time, the rotation direction of the sun gear 46 is counterclockwise, the rotation direction of the planetary gear 63 is clockwise, and the rotation direction of the pinion gear 57 is also clockwise. Further, the rotation direction of the transport roller 28 is a direction in which the disk D is carried in the Y1 direction, and is the counterclockwise direction in FIG.

  As shown in FIG. 6, when the disk D is loaded in the Y1 direction and the center hole Da of the disk D reaches a position slightly on the Y2 side from matching the turntable 22, the front edge of the disk D on the insertion side is It hits the detection pin 96. Further, when the disk D is conveyed in the Y1 direction and the center hole Da substantially coincides with the turntable 22, the detection pin 96 is pushed in the Y1 direction at the edge of the disk D, and as shown in FIG. It is turned clockwise.

  As shown in FIG. 7, when the detection member 94 is rotated in the clockwise direction, the engagement member 51 opposes the urging force of the compression spring 54 by the trigger pin 97 provided on the detection member 94 in the Y2 direction. The rack teeth 52 that are pushed out and formed on the meshing member 51 mesh with the pinion gear 57. As described above, since the pinion gear 57 is rotating clockwise at this time, the meshing member 51 is pulled in the Y2 direction by this rotational force, and the switching slider 15 is also pulled in the Y2 direction following this. Thus, the rack teeth 53 provided on the switching slider 15 mesh with the pinion gear 57 together with the rack teeth 52.

  Thereafter, the switching slider 15 is moved in the Y2 direction by the rotational force of the pinion gear 57. Immediately after the start of this movement, the switching pin 91 provided on the switching arm 88 is released from the meshing portion 92a of the switching cam portion 92 and guided to the detaching portion 92b. Accordingly, the switching arm 88 is rotated clockwise, and the switching gear 87 supported by the switching arm 88 is released from the relay gear 86 as shown in FIG. Therefore, immediately after the center hole Da of the disk D coincides with the turntable 22, the roller drive transmission path (second transmission path) from the sled motor M to the conveyance roller 28 is cut off, and the rotation of the conveyance roller 28 is stopped. .

  When the switching slider 15 further moves in the Y2 direction after the rotation of the conveying roller 28 is stopped, the restricting portion 15b that is the side on the X1 side of the switching slider 15 is brought into contact with the restraining member 74 as shown in FIG. The restriction release portion 15c of the switching slider 15 is opposed to the contact portion 74b. The restraining member 74 whose restriction from the restriction portion 15 b is released is rotated clockwise by the urging force of the urging member 75, and the hook 74 a is separated from the locking portion 65 b of the switching member 65.

  In the state of FIG. 8, the planetary gear 63 rotates in the clockwise direction, and a load for driving the switching slider 15 acts on the intermediate gear 61. Therefore, when the restraint of the switching member 65 is released, the teeth of the planetary gear 63 rotating in the clockwise direction move away from the teeth of the intermediate gear 61, and the teeth of the planetary gear 63 are relayed as shown in FIG. It meshes with the teeth of the member 72. Further, the planetary gear 63 rotating in the clockwise direction rolls over the relay member 72 while meshing with the relay member 72, and the switching member 65 is greatly rotated counterclockwise as shown in FIG. It reaches the blocking position.

  During this time, the transmission member 68 is rotated clockwise by the switching portion 71a of the cam portion 71 provided in the switching member 65, and the transmission convex portion 36c held in the transmission concave portion 68a of the transmission member 68 is in the outer circumferential direction So. The rack member 36 is moved in the outer circumferential direction So by the elastic force of the compression spring 38, and the rack teeth 37 of the rack member 36 mesh with the pinion gear 41. At this time, the planetary gear 63 is rotating in the clockwise direction, and the pinion gear 41 is also rotating in the clockwise direction. Therefore, the rack 36 is pulled in the outer peripheral direction So by the pinion gear 41, and the transmission provided in the rack member 36 is performed. The convex portion 36 c comes out of the transmission concave portion 68 a of the transmission member 68.

  When the transmission convex portion 36c comes out of the transmission concave portion 68, the transmission shaft 69 provided on the transmission member 68 enters the holding portion 71b of the cam portion 71 of the switching member 65, as shown in FIGS. . In the state shown in FIG. 12, the holding portion 71 b is set so as to follow an arc locus having a certain radius R from the center of the shaft 67 that supports the transmission member 68. Therefore, in the state of FIG. 9 and FIG. 12, the transmission member 68 and the switching member 65 are stabilized without inadvertent movement.

  As described above, when the switching slider 15 moves in the Y2 direction to the second position shown in FIG. 9, the disk drive mode is set. In this disk drive mode, the switching slider 15 is biased in the Y2 direction by the biasing force of the reversing spring 29, and the switching slider 15 is stabilized at that position.

(Disk drive mode)
As shown in FIG. 9, in the disk drive mode, the bearing portion 36a of the rack member 36 is brought into close contact with the bearing portion 34a of the optical head 31 by the expansion elastic force of the compression spring 38. The member 36 is integrated and can move along the guide shaft 32 and the guide portion 33.

  In the disk drive mode, as shown in FIGS. 9 and 12, the switching member 65 rotates counterclockwise, the planetary gear 63 is disengaged from the intermediate gear 61, and the power transmission path to the intermediate gear 61 is interrupted. ing.

  When the sled motor M is driven in either the forward or reverse direction in this state, the rotational power of the worm gear 47 is transmitted to the transmission gear 42 via the drive gear 45 and the sun gear 46, and the pinion gear 41 is driven. . In the disk drive mode, if the pinion gear 41 is driven clockwise by the rotation of the sled motor M, the optical head 31 moves toward the outer peripheral direction So, and if the pinion gear 41 is driven counterclockwise, The optical head 31 is driven toward the inner circumferential direction Si.

  In the disk drive mode, as shown in FIG. 9, the switching slider 15 and the switching shaft 16 provided on the switching slider 15 are moved in the Y2 direction, so that the lower chassis 11 is connected to the connecting shaft 13 as shown in FIGS. The center hole Da of the disk D is sandwiched between the turntable 22 and the clamper 23. Further, as shown in FIG. 4, the lock member 18 rotates clockwise, the lock member 18 is separated from the upper housing 2 and the lower housing 3, and the drive unit 10 is elastically supported by the dampers 5 and 7.

  Further, in the disk drive mode shown in FIGS. 4 and 5, the roller arm 27 is rotated counterclockwise about the support shaft 27a by the control hole 18e formed in the lock member 18, and the transport roller 28 is moved. It is separated from the disk D downward. The mode detection switch SW2 is turned on by the front end portion 27b of the roller arm 27.

  In this disk drive mode, the disk D is rotationally driven by the spindle motor 26, and the optical head 31 is driven in the Si-So direction by the power of the motor M to read the signal recorded on the disk D, or the disk A signal is written to D.

(Switch to insertion standby mode and disk ejection operation)
When the disk is ejected by switching from the drive mode shown in FIG. 9 to the insertion standby mode shown in FIG. 6, the sled motor M is driven from the disk drive mode to move the optical head 31 toward the inner circumferential direction Si. . When the rack member 36 moves in the inner circumferential direction Si together with the optical head 31, the transmission convex portion 36 c provided on the rack member 36 is fitted into the transmission concave portion 68 a of the transmission member 68 and is transmitted by the movement force of the rack member 36. The member 68 is rotated counterclockwise.

  When the transmission member 68 rotates counterclockwise, the transmission shaft 69 enters the switching portion 71a of the cam portion 71, the moving force of the rack member 36 acts on the switching member 65 via the transmission member 68, and the switching member 65 is It can be turned clockwise. At this time, the rotation direction of the sun gear 46 is clockwise, and the rotation direction of the planetary gear 63 is counterclockwise. Therefore, when the switching member 65 is slightly rotated clockwise, the teeth of the planetary gear 63 mesh with the teeth of the relay member 72, and the planetary gear 63 moves over the relay gear 72 by its own rotational force and planetarily moves in the clockwise direction. Further, it meshes with the intermediate gear 61.

  Thus, the turning force of the switching member 65 is transmitted to the transmission member 68 via the cam portion 71 while the switching member 65 is rotated clockwise by the counterclockwise rotational force of the planetary gear 63. The transmission member 68 further rotates counterclockwise with the transmission convex portion 36c held in the transmission concave portion 68a. Therefore, after the optical head 31 stops at the end of movement in the inner circumferential direction Si and the limit switch SW1 is turned on, the rack member 36 is further pulled in the inner circumferential direction Si by the rotational power of the planetary gear 63. At this time, as shown in FIG. 6, the bearing member 36 a of the rack member 36 is separated from the bearing member 34 a of the optical head 31, the compression spring 38 is compressed, and the rack teeth 37 of the rack member 36 are completely separated from the pinion gear 41. .

  In this way, when the switching member 65 rotates clockwise and the planetary gear 63 meshes with the intermediate gear 61, the power of the planetary gear 63 passes through the intermediate gear 62, the transmission gear 58, and the pinion gear 57 to the rack. It is transmitted to the teeth 52 and 53. Since the rotation direction of the pinion gear 57 at this time is counterclockwise, the switching slider 15 is moved in the Y1 direction by the rotational force of the pinion gear 57. And it returns to the insertion waiting mode shown in FIG.

  When the insertion standby mode of FIG. 6 is set, as described above, the clamp of the disk D is released, and the roller drive transmission path (second transmission path) from the sled motor M to the transport roller 28 is formed. Therefore, when the conveying roller 28 is driven clockwise in FIG. 2 by the thread motor M, the disc is carried out from the insertion / ejection port 9.

(Retry operation)
As described above, when switching from the drive mode to the insertion standby mode, the pinion gear 41 is driven in the counterclockwise direction, and the rack member 36 engaged with the pinion gear 41 is moved in the inner circumferential direction (second direction) Si. 12, the transmission convex portion 36c is fitted into the transmission concave portion 68a, and the transmission member 68 is rotated counterclockwise by the movement force of the rack member 36 as shown in FIG. At this time, the movement force of the rack member 36 in the inner circumferential direction Si acts on the switching member 65 via the transmission member 68, the switching member 65 rotates clockwise, and the teeth of the planetary gear 63 act on the relay member 72. Engage. Thereafter, as shown in FIG. 11, the planetary gear 63 gets over the relay member 72 by its own rotational force, and the switching member 65 is rotated clockwise by the force of the planetary gear 63 getting over the relay member 72. Further, the transmission member 68 is rotated counterclockwise, and the rack member 36 is drawn in the inner circumferential direction Si by the transmission member 68. At this time, as shown in FIG. The pinion gear 41 is separated, and the planetary gear 63 is engaged with the intermediate gear 61.

  However, when the switching member 65 rotates clockwise from the state shown in FIG. 12, the top of the teeth of the planetary gear 63 hits the top of the teeth of the relay member 72, and the planetary gear 63 and the relay member 72 are connected. There is a possibility that the mechanism cannot be engaged well and the switching member 65 cannot be rotated further in the clockwise direction and the mechanism is locked.

  However, when the switching member 65 rotates clockwise from the state of FIG. 12 and the planetary gear 63 is engaged with the relay member 72, the planetary gear 63 and the sun gear 46 are engaged, and the drive gear 45 and the transmission gear 42 are engaged. Are engaged with each other, and the pinion gear 41 and the rack teeth 37 of the rack member 36 are engaged with each other. That is, the phase of the movement position of the rack tooth 37 of the rack member 36 and the rotation position of each tooth of the planetary gear 63 are related one to one. When the mechanism is locked as described above, a retry operation is performed in which the sled motor M is rotated in the reverse direction to slightly rotate the pinion gear 41 in the clockwise direction and further in the counterclockwise direction. However, since the meshing from the rack teeth 37 to the planetary gear 63 is continued during this time, even if the retry operation is performed, the facing relationship between the teeth of the planetary gear 63 and the teeth of the relay member 72 does not change. Therefore, even after retrying, the top of the teeth of the planetary gear 63 and the top of the teeth of the relay member 72 may come into contact again, and the locked state of the mechanism may not be released.

  Therefore, in the embodiment, a retry operation as shown in the flowchart of FIG. 16 is performed based on the control of the control unit 101.

  In FIG. 16, each step is represented by “ST”. When the disc ejection command shown in ST1 is given in the drive mode shown in FIG. 9, in ST2, the control unit 10 starts the sled motor M and starts the switching operation to the insertion standby mode. As described above, the rotation direction of the sled motor M at this time is the direction of driving the pinion gear 41 counterclockwise, and the rack member 36 and the optical head 31 move toward the inner circumferential direction (first direction) Si. Be made.

  When the optical head 31 moves in the inner circumferential direction, the limit switch (first detection member) SW1 is switched ON in ST3. At this time, in ST4, time measurement using a timer is started, and the driving voltage of the sled motor M is switched from the voltage (for example, 3.5 V) when driving the optical head 31 in the driving mode to switch the mechanism mode. Therefore, the voltage is switched to a voltage (for example, 5 to 6 V) higher than that in the driving mode. When the disk ejection command of ST1 is given, the drive voltage of the sled motor M is switched to a voltage higher than that in the disk drive mode, and the optical head 31 is moved in the inner circumferential direction at a high speed to perform the mode switching operation. You may go.

  In ST5, it is monitored whether or not the mode detection switch SW2, which is the second detection member, is turned off after a predetermined time from the start of time measurement. As described above, after the limit switch SW1 is turned on, the pinion gear 41 further rotates, and the rack member 36 further moves in the inner circumferential direction (first direction) Si while the optical head 31 is stopped. As shown in FIG. 11, the transmission member 68 rotates counterclockwise, and the switching member 65 rotates clockwise. If the planetary gear 63 can mesh with the relay member 72, then the switching slider 15 moves in the Y2 direction, and the roller arm 27 starts to rotate counterclockwise from the state shown in FIGS. When the roller arm 27 starts to rotate, the front end portion 27b of the roller arm 27 moves away from the mode detection switch SW2 that is the second detection member, and the mode detection switch SW2 is turned off.

  Thus, when it is detected in ST5 that the mode detection switch SW2 has been switched OFF within a predetermined time after the time measurement, the power of the sled motor M is switched to the roller drive transmission path (second transmission path). It is recognized that Therefore, at ST6, the sled motor M is stopped when it is detected by a detection member (not shown) that the disc has been unclamped and the disc has been ejected to a predetermined position (ST7).

  On the other hand, when the predetermined time has elapsed from the start of time measurement in ST5 and the mode detection switch SW2 is not switched OFF, the control unit 101 determines that the mode switching operation has not been performed normally, and ST8 Move to retry operation. The number of times this retry operation is performed is set to several times in advance. In ST9, it is determined whether or not a retry command has been issued beyond the predetermined number.

  When the retry command does not exceed the predetermined number, the process proceeds to ST10 and a retry operation is performed. In the retry operation of ST10, the sled motor M is slightly reversed, the pinion gear 41 is rotated clockwise, and the rack member 36 is once moved in the outer circumferential direction So. The moving distance of the rack member 36 at this time is such that the optical head 31 does not hit the stopper 11d shown in FIG. 13, for example, about 10 mm. Therefore, in this retry operation, the phases of the rack teeth 37 of the rack member 36 and the teeth of the planetary gear 63 remain in a one-to-one relationship. Thereafter, the rotation direction of the sled motor M is returned to the base, the rack member 36 is moved again in the inner circumferential direction Si, and the flow returns to the flow after ST2.

  In ST9, when it is determined that the retry command has exceeded a predetermined number of times, the top of the teeth of the planetary gear 63 hits the top of the teeth of the relay member 72, and there is a high possibility that the mode switching operation cannot be performed. Therefore, at this time, the process proceeds to ST11 and a second retry operation different from the previous one is performed.

  In the second retry operation, in ST12, the thread motor M is rotated in the reverse direction, the pinion gear 41 is rotated clockwise for a predetermined time, and the rack member 36 and the optical head 31 are moved in the outer peripheral direction (second direction) So. At this time, as shown in FIG. 13, the sled motor M is continuously driven even after the optical head 31 hits the stopper 11d and stops. At this time, the idling means shown in FIG. 14 operates. That is, the rack member 36 is rotated in the α2 direction by the inclined tooth tip 41a and tooth base 41b of the pinion gear 41, the rack tooth 37 is disengaged from the pinion gear 41, and the pinion gear 41 is idled.

  Thereby, the meshing position of the rack teeth 37 and the teeth of the pinion gear 41 is changed. Therefore, when the process proceeds to ST2 and the mode switching operation is restarted thereafter, the phase between the movement position of the rack teeth 37 and the teeth of the planetary gear 63 is changed, so that the planetary gear 63 meshes with the relay member 72. Probability can be increased and mode switching can be completed.

  In the present invention, the idling means may be provided in any one of the paths from the worm gear 47 to the rack member 36, and the idling means may be constituted by a one-way clutch.

1 is an exploded perspective view showing a drive unit of a disk device according to a first embodiment of the present invention; A side view of the disk device showing the insertion standby mode, A longitudinal sectional view of the disk device showing the insertion standby mode, A side view of the disk device showing the disk drive mode, Sectional view of the disk device showing the disk drive mode, It is a bottom view of the lower chassis of the disk drive unit, showing the insertion standby mode, It is a bottom view of the lower chassis of the disk drive unit, showing a state where the insertion of the disk is detected, It is a bottom view of the lower chassis of the disk drive unit, showing the switching operation from the insertion standby mode to the drive mode, It is a bottom view of the lower chassis of the disk drive unit, showing the drive mode, A partially enlarged view of FIG. A partially enlarged view showing the transition from the insertion standby mode to the disk drive mode, A partially enlarged view of FIG. A partial bottom view showing a state in which the optical head and the rack member have moved in the outer circumferential direction, Sectional drawing in the abcd line of FIG. Control circuit block diagram of the disk device, Operation flowchart of the disk device,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disk apparatus 2 Upper housing | casing 3 Lower housing | casing 5,7 Damper 10 Drive unit 11 Lower chassis 12 Upper chassis 15 Switching slider 15b Control part 18 Locking member 21 Locking shaft 22 Turntable 23 Clamper 28 Carrying roller 30 Mode switching device 31 Light Head 32 Guide shaft 33 Guide portion 34a, 34b Bearing portion 35 Sliding portion 36 Rack member 36a, 36b Bearing portion 36c Transmission convex portion 37 Rack tooth 38 Compression spring 41 Pinion gear 46 Sun gear 51 Engaging member 52, 53 Rack tooth 54 Compression spring 57 Pinion gear 63 Planetary gear 65 Switching member 68 Transmission member 68a Transmission recess 69 Transmission shaft 71 Cam portion 72 Relay member 74 Restraining member 74a Hook 74b Contact portion 87 Switching gear 88 Switching arm 101 Control portion SW1 Limit switch (First detection member)
SW2 mode detection switch (second detection member)
Si inner circumferential direction (first direction)
So Outer direction (second direction)

Claims (7)

A rotation drive unit (22) for rotating the disk (D), a head (31) supported so as to be reciprocally movable facing the recording surface of the disk (D), and a rack member that moves together with the head (31) (36), the pinion gear (41) meshing with the rack member (36), and the moving force for loading the disk (D) into the rotational drive section (22) or the rotational drive section (22) to be discharged. In a disk apparatus having disk conveying means (28) for applying a moving force,
A first transmission path for supplying power of the thread motor (M) to the rack member (36) via the pinion gear (41) and a second transmission path for supplying power to the disk transport means (28). A switching member (65) for switching to the transmission path;
With the switching to the first transmission path, the switching member (65) is moved by the moving force when the head (31) moves in the first direction by the power of the sled motor (M). A transmission member (68) for switching to the second transmission path;
When the head (31) is moved in the second direction by the power of the sled motor (M) while being switched to the first transmission path, the sled motor (M) is moved by the moving force. And idling means for idling the transmission of power from the rack member (36) to the rack member (36),
After the detection member (SW1) detects that the head (31) has moved in the first direction, the thread (M) causes the head ( 31) A disk device controlled to move the idling means by moving 31) in the second direction.   A second detection member (SW2) that detects that the switching member (65) has been switched to the second transmission path is provided, and the second detection member (SW1) is detected within a predetermined time after detection by the detection member (SW1). The disk device according to claim 1, wherein the head (31) is moved in the second direction when the detection member (SW2) is not operated.   By operating the idling means, the movement position of the rack member (36) and the rotational phase of the gear (63) provided on the switching member (65) are changed, and then the rack member (36) The disk device according to claim 1 or 2, wherein when the gear moves in the first direction, the gear (63) is surely engaged with the second transmission path.   The disk apparatus according to any one of claims 1 to 3, wherein the idling means releases the meshing between the rack member (36) and the pinion gear (41).   At least one of the rack teeth (37) of the rack member (36) and the teeth of the pinion gear (41) is formed to be inclined with respect to an orthogonal line orthogonal to the moving direction of the rack member (36), and The rack member (36) is rotatable about a movement line extending in the moving direction, and when the moving force in the second direction acts on the rack member (36), the rack member (36) is rotatable. The disk apparatus according to claim 4, wherein the engagement between the member (36) and the pinion gear (41) is disengaged. A biasing member (38) for biasing the rack member (36) in the second direction is provided between the head (31) and the rack member (36).
The rack member (36) is moved to a position disengaged from the pinion gear (41) by the switching member (65) when the head (31) moves in the first direction. The disk device according to any one of the above.   A sun gear (46) driven by the thread motor (M), a planetary gear (63) meshing with the sun gear (46), and a relay member (72) meshing with the planetary gear (63) are provided, Due to the rotational force of the planetary gear (63) when the planetary gear (63) meshes with the relay member (72), the switching member (65) is moved between the first transmission path and the second transmission path. 7. The disk device according to claim 1, wherein the disk device is switched.

Images