JP2006127615A - Disk unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "disk unit" in which a switching member for switching transmission paths of power of a motor can be stabilized without moving at a state where the power transmission path is set. <P>SOLUTION: When the switching member 68 is turned to one direction, the power of the motor is transmitted to a rack member 36 constituting a head feed mechanism and an optical head is moved together with the rack member 36. At this time, the switching member 68 is restrained from carelessly turning by a regulation projection 75. In addition, when the rack member 36 moves in the inner peripheral direction Si, the switching member 68 is turned by a transmission projected part 36c and the power of the motor is transmitted to a transportation means. At this time, the regulation projection 75 enters in a transmission recessed part 68a of the switching member 68 and turn of the switching member 68 is regulated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk device in which a head feeding mechanism and, for example, a disk conveying means other than the head feeding mechanism are driven by a common motor, and in particular, when the power transmission path of the motor is switched, the switching state is changed. The present invention relates to a disk device that can be securely held.

  A so-called slot-in system in which an insertion slot for inserting a disk such as a compact disk (CD) or a digital versatile disk (DVD) is provided in a disk device for in-vehicle use. In this disk apparatus, when a disk is inserted from the insertion slot, the disk is conveyed into the apparatus by the conveying means provided inside the insertion slot, and the center hole of the disk is clamped to the rotation drive unit. When the disk is rotationally driven by the rotation driving means, the optical head moves along the recording surface of the disk, and the signal recorded on the disk is read and the signal is recorded on the disk.

  In the conventional disk device, a spindle motor that is the power of the rotation drive unit, a thread motor that moves the optical head along the disk, a transport motor that operates the transport means, and a disk are rotated. Many motors such as a mode switching motor for operating a clamp mechanism for clamping to a drive unit are mounted. However, when a separate motor is used for each mechanism, there are problems that the number of motors in the apparatus increases, the cost of the apparatus increases, and the weight increases.

Therefore, in Patent Document 1 and the like described below, the power of the threat motor is transmitted to the conveying means at the time of loading and unloading of the disk, in which the optical head does not need to move, and the disk using the power of the threat motor is utilized. It is considered to carry in and out.
JP 2002-140849 A

  However, in the structure in which the conveying means is operated using the power of the threat motor, the power transmission path is set so that the power of the threat motor does not act as the moving force of the optical head when the conveying means is operated. It is necessary to switch reliably. That is, if the power of the threat motor acts as the moving force of the optical head when the transport means is operated by the threat motor, the optical head is being transported while the disk is being transported toward the rotation drive unit. However, even if it moves to the end of the moving stroke, the moving force is still applied to the optical head, causing problems such as damage to the head feed mechanism.

  The disk device described in Patent Document 1 and the like is provided with a switching mechanism that switches a power transmission path from the thread motor. In this switching mechanism, any of the switching mechanisms is mainly performed by using the force of a spring. The power transmission path can be maintained in a set state.

  However, if the switching mechanism has a structure in which the power transmission path is stabilized by the force of the spring, when the repetitive operation continues, the spring fatigues and the elastic force decreases, or the operating load of the mechanism is reduced by dust or dirt. There is a possibility that the mechanism cannot be stabilized only by the force of the spring. In addition, when a spring is provided in the switching mechanism, the mechanism parts are densely packed, and the probability that the parts interfere with each other to cause a malfunction increases, and the cost increases due to an increase in the number of parts.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a disk device that can always stably switch a power transmission path of a motor and is less likely to cause malfunction due to spring fatigue. It is said.

The present invention relates to a rotation drive unit that holds and rotates a disk, a head that performs at least one of reproduction and recording of a signal to the disk, and head feed that moves the head in an inner circumferential direction and an outer circumferential direction of the disk. In the disk device provided with the mechanism,
When the first power transmission path for transmitting the power of the motor to the head feed mechanism, the second power transmission path for transmitting the power of the motor to the mechanism operation unit other than the head feed mechanism, and the first position are moved. A switching member for setting the power transmission path of the motor to the first power transmission path and setting the power transmission path of the motor to the second power transmission path when moved to the second position; And a transmission portion that moves the switching member from the first position to the second position when the head moves to the inner circumference side or the outer circumference side.
In the apparatus, when the switching member moves to the second position, there is provided a restricting portion that engages with the switching member and restricts the return operation of the switching member to the first position. It is characterized by.

  In the disk device, when the switching member moves to the second position, the switching member can be maintained in the switching state by mechanical engagement with the restricting portion, so that the motor power is a mechanism operation unit other than the head feed mechanism. Thus, it is possible to reliably prevent the power of the motor from being transmitted to the head feed mechanism.

  Further, according to the present invention, when the switching member is moved to the first position, the restricting portion and the switching member are engaged to restrict movement of the switching member to the second position. It is.

  As described above, when the movement of the switching member to the second position is restricted, the power of the motor is always supplied stably to the head feed mechanism.

  For example, according to the present invention, the switching member is formed with a transmission concave portion that fits with the transmission portion when the transmission portion moves together with the head, and the switching member moves to the second position when the transmission member moves to the second position. The restricting portion is engaged with the transmission recess. Further, when the switching member moves to the first position, the restricting portion faces the side portion of the switching member, and the movement of the switching member to the second position is restricted.

  In the above means, the switching member is provided with a transmission concave portion that engages with the transmission portion that moves together with the head, and this switching concave portion is used to stabilize the switching member at the second position. Therefore, it is not necessary to separately provide a concave portion or a convex portion for the purpose, the shape of the switching member can be reduced, and the entire mechanism can be reduced in size.

  Further, according to the present invention, the head feed mechanism is provided with a rack that moves together with the head, and a pinion gear that applies a moving force to the rack, the transmission unit is provided in the rack, and the switching member is When moved to the second position, the transmission portion is held by the switching member, and the rack is moved to a position where it is removed from the pinion gear.

  In the above configuration, when the switching member is stabilized in the second position by the restricting portion, the rack is separated from the pinion by the operation of the switching member, so when driving another mechanism operation portion, It is possible to reliably prevent the power of the motor from being transmitted as the moving force of the head.

  For example, in the present invention, the mechanism operation unit driven by the second power transmission path is a transport unit that transports a disk toward the rotation drive unit.

  Alternatively, the mechanism operating unit includes a clamp mechanism that clamps the disk to the rotation drive unit, and a lock mechanism that locks the rotation drive unit elastically supported by a damper or the like in the housing so that the disk does not move when the disk is loaded or unloaded. It may be.

  In the present invention, when the power of the motor is transmitted to a mechanism operating unit other than the head feed mechanism, the power transmission state is maintained by mechanical engagement between the switching member and the restricting unit. Therefore, it is possible to reliably prevent the motive power of the motor from being transmitted to the head feed mechanism when other mechanism operation units such as the conveying means are operated by the motor. Further, it is possible to stabilize the switching state in a state where the power of the motor is transmitted to the head feed mechanism. In addition, since the switching member and the restricting portion are mechanically engaged, even when used for a long period of time, malfunction or the like hardly occurs.

  FIG. 1 is a perspective view of a drive base, showing a main part of a disk device according to an embodiment of the present invention. 2 and 3 are bottom views according to the operation shown from the lower surface side by reversing the drive base shown in FIG. 1 left and right, and FIG. 4 is a transmission provided on the first switching member, the regulating protrusion and the rack. FIGS. 5 (A) and 5 (B) are side views according to operations when FIG. 4 is viewed from the direction of the arrow V, and FIG. 6 is a partially enlarged view showing a power transmission switching state. FIG.

  The disk device 1 of this embodiment is for in-vehicle use, and performs signal recording and signal reproduction with respect to a disk such as an optical recording DVD or CD. As shown in FIG. 1, support pins 4 and 4 are provided on both left and right sides of the drive base 11 in the x direction, and the support pins 4 and 4 are provided in a coil spring (not shown) provided in the housing of the disk device 1. Further, the vibration generated when the vehicle travels can be absorbed by being supported in an elastically levitated state by an air-type or oil-type damper member.

  As shown in FIG. 2, the power is transmitted to the lower surface of the drive base 11 to a sled power transmission path (first power transmission path) for moving the optical head 31 and to the conveying roller 28. A motor M that transmits to a path (second power transmission path) is provided.

  Various gears are shown in FIGS. 2, 3 and 6 to be described below. Of the various gears, the details of the tooth shape are necessary for the description of the meshing, and need to be explained in particular. The gears that do not draw only the pitch circle, and the detailed structure is not shown.

  As shown in FIG. 1, a window 11 b is opened in the drive base 11. An optical head 31 is provided on the lower surface of the drive base 11, and an objective lens 31 a provided on the optical head 31 is exposed from the window 11 b toward the upper surface of the drive base 11. 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.

  As shown in FIG. 2, on the lower surface of the drive base 11, a guide shaft 32 and a guide portion 33 are disposed in parallel with each other and extend inclining in both the x and y directions. On one side of the optical head 31, bearings 34a and 34b are formed at intervals in the moving direction, and the bearings 34a and 34b are slidably fitted on the guide shaft 32. . A sliding portion 35 having a U-shaped sliding groove is formed on the other side portion of the optical head 31, and the sliding groove is slidably fitted so as to sandwich the guide portion 33 therebetween. . 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 direction) and the outer circumferential direction (So direction) of the disk D. That is, the guide shaft 32 and the guide portion 33 function as guide means for guiding the optical head 31 in the inner circumferential direction Si and the outer circumferential direction So.

  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. The other bearing portion 36b is slidably inserted on the guide shaft 32 at a position away from the bearing portion 34b of the optical head 31 toward the inner peripheral side (i side).

  A compression spring 38 that is an urging member 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 externally attached to the guide shaft 32. . The compression spring 38 is interposed between the bearing portion 36a and the bearing portion 34b in a state where the compression spring 38 is compressed in the longitudinal direction that is the moving direction (So-Si direction) of the optical head 31, and due to the repulsive force. The entire bearing portion 36a and the rack member 36 are biased in the outer circumferential direction So. As a result, as shown in FIG. 2, the optical head 31 and the rack member 36 are integrated with each other in the radial direction of the disk in a state where the bearing portion 36a is in close contact with the bearing portion 34a by the elastic force of the compression spring 38. It is possible to move to (So-Si).

  On the side of the rack member 36, a shaft 43 is fixed to the lower surface of the drive base 11, and the pinion gear 41 and the transmission gear 42 are supported on the shaft 43 so as to rotate together. The pinion gear 41 and the transmission gear 42 are integrally formed of synthetic resin or the like, or formed separately and fixed to each other by means such as adhesion.

  As shown in FIGS. 2 and 3, a shaft 44 is fixed to the lower surface of the drive base 11 at the side of the transmission gear 42, and the drive gear 45 and the sun gear 46 are integrated with the shaft 44. It is supported so that it can rotate. The sun gear 46 meshes with the transmission gear 42, and the worm gear 47 provided on the output shaft of the motor M fixed to the drive base 11 meshes with the drive gear 45. The sun gear 46 is in mesh with a planetary gear 63.

  In this embodiment, a head feed mechanism 30 is constituted by the rack member 36. 2, the rack teeth 37 of the rack member mesh with the pinion gear 41, and the power of the motor M is transmitted from the worm gear 47 to the pinion gear 41 via the drive gear 45, the sun gear 46, and the transmission gear 42. The power is transmitted from the pinion gear 41 to the rack teeth 37 of the rack member 36 so that the optical head 31 can be driven in the So-Si direction together with the rack member 36. That is, in FIG. 2, a sled power transmission path (first power transmission path) that can transmit the power of the motor M to the rack member 36 that is the head feeding mechanism 30 is set.

  A shaft 59 is fixed to the drive base 11, and an intermediate gear 61 and an intermediate gear 62 are supported on the shaft 59 so as to rotate together. In FIG. 2, since the planetary gear 63 is separated from the intermediate gear 61, the power of the motor M is transmitted only to the pinion gear 41. On the other hand, as shown in FIG. 3, when the planetary gear 63 meshes with the intermediate gear 61, the power of the motor M is transmitted not only to the pinion gear 41 but also to the intermediate gear 61. When power is transmitted to the intermediate gear 61, the rotational force of the intermediate gear 61 is further transmitted to the roller gear 28c, and the transport roller 28, which is a transport means for transporting the disk D, is rotated.

  That is, in FIG. 3, a second power transmission path capable of transmitting the power of the motor M to the transport roller 28 is set.

  A fan-shaped second switching member 65 is rotatably supported on the shaft 44, and a shaft 64 is fixed to the second switching member 65, and the planetary gear 63 is rotatable on the shaft 64. It is supported by.

  As shown in FIGS. 2, 3 and 6, a shaft 67 is fixed between the movement path of the rack member 36 and the second switching member 65, and the first switching member 68 is fixed to the shaft 67. Is rotatably supported. A transmission recess 68 a is formed at one end of the first switching member 68. The rack member 36 is integrally formed with a transmission convex portion 36c, and the transmission convex portion 36c can be fitted into the transmission concave portion 68a as the rack member 36 moves in the inner circumferential direction Si. Yes.

  As shown in FIG. 6, a cam portion 71 is formed on the second switching member 65. The cam portion 71 is a cam groove or a cam hole, and a transmission shaft 69 fixed to the other end of the first switching member 68 is slidably inserted into the cam portion 71.

  A relay member 72 fixed to the drive base 11 is provided outside the second switching member 65. In the relay member 72, two teeth that mesh with the teeth of the planetary gear 63 are formed along the movement path of the planetary gear 63.

  4 and 5A and 5B show the relationship between the first switching member 60, the rack member 36, and the transmission convex portion 36c in an enlarged manner.

  The first switching member 68 is made of a synthetic resin material. As shown in FIGS. 5A and 5B, the lower edge portion (the edge portion facing the drive base 11) of the outer surface 68b located on the right outer side of the transmission concave portion 68a of the first switching member 68 has an outer slide. A moving surface 68c is formed. The outer sliding surface 68c is a curved surface or an inclined surface that gradually approaches the transmission recess 68a toward the drive base 11. An inner sliding surface 68e is formed on the lower edge of the inner wall surface 68d facing the outer surface 68b of the transmission recess 68a. The inner sliding surface 68e is a curved surface or an inclined surface that gradually approaches the outer surface 68b toward the drive base 11.

  A regulation protrusion 75 is fixed to the lower surface of the drive base 11 (the surface facing upward in FIGS. 4 and 5). The restricting protrusion 75 is a metal pin or a protrusion bent from the drive base 11. The restricting protrusion 75 of this embodiment is a metal pin, and its upper surface 75a is spherical, or the outer peripheral surface of the upper surface 75a is a tapered surface.

  As shown in FIG. 5A, the height dimension H1 of the restricting protrusion 75 from the drive base 11 is larger than the height dimension H2 from the drive base 11 to the lower surface of the first switching member 68. The height dimension of the curved surface or the inclined surface of the outer sliding surface 68c and the inner sliding surface 68e and the height dimension of the spherical surface or the tapered surface of the upper surface 75a of the restricting projection 75 are the difference in height dimension (H1-H2). ) Is preferably larger. Further, the height dimension H3 from the drive base 11 to the lower surface of the transmission projection 36c is slightly larger than the height dimension H1 of the restricting protrusion 75.

  A shaft 73 is fixed to the drive base 11, and a restraining member 74 is rotatably supported on the shaft 73. A hook 74 a is formed integrally with the left end of the restraining member 74. As shown in FIG. 3, the hook 74 a can be locked to the second switching member 65 when the second switching member 65 is rotating counterclockwise. The restraining member 74 is rotated by a control mechanism (not shown).

  Further, the disk device 1 is provided with a turntable 26 constituting a rotation drive unit and a spindle motor for rotating the turntable 26.

Next, the switching operation of the disk device 1 will be described.
FIG. 2 shows a disk drive mode in which information is recorded on or reproduced from the disk D. In this mode, the rack member 36 and the pinion gear 41 are engaged with each other to set a sled power transmission path (first power transmission path), and the power of the motor M is applied to the rack member 36 constituting the head feed mechanism 30. Transmission to the rack teeth 37 is possible.

  In FIG. 2, the first switching member 68 is rotated clockwise and set to the first position. The transmission convex portion 36 c provided on the rack member 36 is separated from the transmission concave portion 68 a of the first switching member 68. When the first switching member 68 is rotated clockwise and set at the first position, the transmission shaft 69 of the first switching member 68 causes the second switching member 65 to rotate counterclockwise. The planetary gear 63 provided on the second switching member 65 is separated from the intermediate gear 61. Therefore, the power of the motor M is not transmitted to the transport roller 28, and the second power transmission path is blocked.

  In FIG. 2, the restraining member 74 is rotated clockwise by a control mechanism (not shown) so that the hook 74 a does not hinder the operation of the second switching member 65.

  As shown in FIGS. 4 and 5A, when the first switching member 68 is in the first position, the upper end portion of the restricting projection 75 is opposed to the outside of the outer surface 68b of the first switching member 68. is doing. Accordingly, the first switching member 68 does not rotate counterclockwise from the state shown in FIG. 2, and the first switching member 68 is reliably held at the first position. When the first switching member 68 is held at the first position, the second switching member 65 is also held in a state of rotating counterclockwise, and the planetary gear 63 meshes with the intermediate gear 61. There is nothing.

  When the motor M is driven forward and reverse in the state shown in FIG. 2, the power is transmitted from the worm gear 47 to the pinion gear 41 via the drive gear 45, the sun gear 46, and the transmission gear 42. Power is transmitted to the rack teeth 37 of the member 36, and the optical head 31 moves in the inner circumferential direction and the outer circumferential direction along the information recording surface of the disk D. Then, the disk D is set on the turntable 26, the disk D is rotationally driven, and information is recorded on or reproduced from the disk D by the optical head 31.

  Next, when the user performs an operation of ejecting the disk D outside the apparatus, the rotation of the turntable 26 is stopped. Further, the pinion gear 41 is rotated counterclockwise by the power of the motor M, and the optical head 31 is moved in the inner circumferential direction (i direction). At this time, the optical head 31 is moved further in the inner circumferential direction beyond the movement range of the optical head 31 when recording or reproduction is performed.

  When the optical head 31 moves further to the inner peripheral side beyond the moving range at the time of recording or reproducing operation, the transmission convex portion 36c provided on the rack member 36 is moved to the first switching member 68 as shown in FIG. The first switching member 68 is rotated counterclockwise by the moving force in the Si direction of the rack member 36 entering the transmission recess 68a. Then, the second switching member 65 is rotated clockwise by the transmission shaft 69 of the first switching member 68. At this time, the pinion gear 41 is rotating counterclockwise, and the planetary gear 63 is also rotating counterclockwise. Therefore, when the second switching member 65 is slightly rotated clockwise, the planetary gear 63 rotating counterclockwise meshes with the relay member 72, and the planetary gear 63 is rotated by the rotational force of the planetary gear 63. Gets over the relay member 72, and the second switching member 65 is rotated clockwise, and the planetary gear 63 is engaged with the intermediate gear 61 as shown in FIG.

  In this way, when the planetary gear 63 gets over the relay member 72 and the second switching member 65 rotates in the clockwise direction, the turning force is transmitted to the first switching member 68 via the cam portion 71, and FIG. As shown in FIG. 3, the first switching member 68 is further rotated counterclockwise and set to the second position. At this time, since the first switching member 68 is forcibly rotated counterclockwise by the rotational force of the planetary gear 63, the transmission convex portion 36c held in the transmission concave portion 68a of the first switching member 68 is internally Pulled in the circumferential direction (Si direction), the compression spring 38 contracts, the rack member 36 is forcibly moved in the inner circumferential direction, and the rack teeth 37 are separated from the teeth of the pinion gear 41.

  In addition, the restraining member 74 is rotated counterclockwise, the hook 74a is hooked on the second switching member 65, and the second switching member 65 is restrained from rotating counterclockwise. .

  As a result, as shown in FIG. 3, the power of the motor M is transmitted from the intermediate gear 61 to the intermediate gear 62 through the worm gear 47, the drive gear 45, the sun gear 46, and the planetary gear 63, and further transmitted to the roller gear 28c. The second power transmission path is formed. On the other hand, since the rack teeth 37 are separated from the pinion gear 42 as described above, the sled power transmission path (first power transmission path) is interrupted.

  As described above, the rotation force of the planetary gear 63 in the counterclockwise direction causes the second switching member 65 to rotate in the clockwise direction, and accordingly, the first switching member 68 rotates in the counterclockwise direction. Sometimes, the outer sliding surface 68c of the first switching member 68 shown in FIG. 5A hits the spherical surface or the tapered surface of the upper surface 75a of the restricting projection 75, and the lower surface of the first switching member 68 is the surface of the restricting projection 75. As shown in FIG. 5 (B), the restricting projection 75 enters the transmission recess 68a of the first switching member 68 after getting over the upper surface 75a.

  As a result, when the first switching member 68 is in the second position shown in FIG. 3, the first switching member 68 is restricted by the restriction protrusion 75. Therefore, even if the transmission shaft 69 provided in the first switching member 68 moves in the cam portion 71 provided in the second switching member 65, the first switching member 68 is in the second position. Inadvertently turning clockwise is restricted.

  In the state of FIG. 3, an elastic force in the outer circumferential direction (So direction) acts on the rack member 36 due to the elastic force of the compression spring 38, and the first switching member 65 is biased in the clockwise direction by this elastic force. Is working. However, since the first switching member 68 is regulated by the regulation projection 75, the transmission shaft 69 moves in the cam portion 71 by the biasing force, and the transmission convex portion 36c provided on the rack member 36 is Generation | occurrence | production of the malfunction which slips out from the transmission recessed part 68a of the switching member 65, and the rack tooth 37 and the pinion gear 42 mesh can be prevented.

  When the motor M is driven in the forward direction or the reverse direction in the state of FIG. 3, the power is transmitted to the roller gear 28c through the second power transmission path, and the transport roller 28 is driven. The disc D can be ejected by the rotational force in one direction of the transport roller 28, and the disc D can be carried in by the subsequent rotational force in the other direction.

  Next, to shift to the disk drive mode shown in FIG. 2 again, the restraint member 74 is rotated clockwise in the state of FIG. The gear 46 is rotated counterclockwise. As a result, the planetary gear 63 rotates clockwise, and the planetary gear 63 moves away from the intermediate gear 61 and meshes with the relay member 72 and then moves to the position shown in FIG.

  At this time, the planetary gear 63 rotates the second switching member 65 counterclockwise by the force over the relay member 72, and accordingly, the first switching member 68 is rotated clockwise. Since the rack member 36 is urged in the So direction by the elastic force of the compression spring 38, the transmission convex portion 36 c comes out of the transmission concave portion 68 a and the rack teeth 37 mesh with the pinion gear 41.

  Since the first switching member 68 is forcibly rotated clockwise, the inner sliding surface 68e of the first switching member 68 hits the upper surface 75a of the restricting protrusion 75 from the state shown in FIG. Furthermore, the lower surface of the first switching member 68 gets over the restricting projection 75 and returns to the state of FIGS. 4 and 5A.

  In the above-described embodiment, the first switching member 68 is mechanically engaged with the restricting protrusion 75 so as to be stable at the first position shown in FIG. 2 and the second position shown in FIG. However, instead of the first switching member 68, the second switching member 65 is regulated by the regulation projection 75 at the first position shown in FIG. 2 and the second position shown in FIG. Also good.

The perspective view which shows the drive base of the disc apparatus of embodiment of this invention, It is a bottom view of the disk drive base, showing a state where the first power transmission path is set, It is a bottom view of the disk drive base, showing a state where the second power transmission path is set, The expanded perspective view which shows the positional relationship of a 1st switching member, a control protrusion, and a transmission convex part, (A) and (B) are side views according to the operation of the arrow V in FIG. An enlarged view showing the power switching unit,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disk apparatus 11 Drive base 28 Conveyance roller 30 Head feed mechanism 31 Optical head 32 Guide shaft 33 Guide part 34a, 34b Bearing part 36 Rack member 36a, 36b Bearing part 36c Transmission convex part 37 Rack tooth 38 Compression spring (biasing member)
41 pinion gear 46 sun gear 63 planetary gear 65 second switching member 68 first switching member 68a transmission recess 69 transmission shaft 71 cam portion 72 relay member 74 restraining member 74a hook 75 regulating projection M motor Si inner circumferential direction So outer circumferential direction

Claims (6)

There is provided a rotation drive unit that holds and rotates the disk, a head that performs at least one of reproduction and recording of signals with respect to the disk, and a head feed mechanism that moves the head in an inner circumferential direction and an outer circumferential direction of the disk. In the disk unit
When the first power transmission path for transmitting the power of the motor to the head feed mechanism, the second power transmission path for transmitting the power of the motor to the mechanism operation unit other than the head feed mechanism, and the first position are moved. A switching member for setting the power transmission path of the motor to the first power transmission path and setting the power transmission path of the motor to the second power transmission path when moved to the second position; And a transmission portion that moves the switching member from the first position to the second position when the head moves to the inner circumference side or the outer circumference side.
In the apparatus, when the switching member moves to the second position, there is provided a restricting portion that engages with the switching member and restricts the return operation of the switching member to the first position. A disk device characterized by the above. There is provided a rotation drive unit that holds and rotates the disk, a head that performs at least one of reproduction and recording of signals with respect to the disk, and a head feed mechanism that moves the head in an inner circumferential direction and an outer circumferential direction of the disk. In the disk unit
When the first power transmission path for transmitting the power of the motor to the head feed mechanism, the second power transmission path for transmitting the power of the motor to the mechanism operation unit other than the head feed mechanism, and the first position are moved. A switching member for setting the power transmission path of the motor to the first power transmission path and setting the power transmission path of the motor to the second power transmission path when moved to the second position; And a transmission portion that moves the switching member from the first position to the second position when the head moves to the inner circumference side or the outer circumference side.
In the apparatus, when the switching member moves to the first position, there is provided a restricting portion that engages with the switching member and restricts the return operation of the switching member to the second position. A disk device characterized by the above.   The switching member is formed with a transmission concave portion that fits with the transmission portion when the transmission portion moves together with the head, and when the switching member moves to the second position, the restricting portion becomes the transmission concave portion. The disk device according to claim 1, wherein the disk device is engaged with the disk device.   The switching member is formed with a transmission concave portion that fits with the transmission portion when the transmission portion moves together with the head, and when the switching member moves to the second position, the restricting portion becomes the transmission concave portion. And when the switching member moves to the first position, the restricting portion faces a side portion of the switching member and the movement of the switching member to the second position is restricted. 2. The disk device according to 2.   The head feeding mechanism is provided with a rack that moves together with the head and a pinion gear that applies a moving force to the rack, the transmission portion is provided in the rack, and the switching member moves to the second position. 5. The disk device according to claim 1, wherein the transmission unit is held by the switching member and the rack is moved to a position disengaged from the pinion gear.   6. The disk device according to claim 1, wherein the mechanism operation unit driven by the second power transmission path is a transport unit that transports the disk toward the rotation drive unit.