JP3913654B2 - Disk unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk device having a disk rotation driving unit and a disk conveying means, and more particularly to a disk device having a clamping means for clamping a disk to the rotation driving unit.
[0002]
[Prior art]
In the in-vehicle disk device, the mechanism unit is provided with a disk rotation driving unit, a clamping unit for clamping the disk to the rotation driving unit, and a conveying unit for supplying the disk to the rotation driving unit. Then, the transmission of the conveying force to the disk is interrupted in conjunction with the clamping operation of the clamping means, and switching is performed so that the conveying force can be transmitted to the disk in conjunction with the clamp releasing operation of the clamping means.
[0003]
As described in Patent Document 1 below, in the clamp means of a conventional in-vehicle disk device, the base of the clamp arm is rotatably supported by the mechanism chassis, and the clamper rotates at the tip of the clamp arm. It is provided freely. The clamp arm is urged toward the turntable of the rotation drive unit, and the urging force presses the clamper against the disk on the turntable.
[0004]
Further, by rotating the clamp arm upward, the clamper is separated from the disk, and the disk clamp is released.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-16328
[0006]
[Problems to be solved by the invention]
However, if the base end of the clamp arm is rotatably supported by the mechanism chassis as in the prior art, when the clamper moves away from the rotation drive unit, the tip of the clamper is separated from the rotation drive unit. Since it rises diagonally in the direction of leaving, the absolute height dimension of the mechanism increases.
[0007]
Further, when lifting the clamp arm for releasing the clamp, since the load of the biasing member acts on the lifting mechanism from the beginning, a large load is applied for releasing the clamp and a large driving force is required.
[0008]
The present invention solves the above-described conventional problems, and an object of the present invention is to provide a thin disk device that can reliably perform a clamp release operation and can reduce a load that acts on the clamp release operation.
[0009]
[Means for Solving the Problems]
  According to the present invention, a mechanism unit is provided inside an external chassis, and the mechanism unit is provided with a rotation drive unit that drives a disk, and a clamp unit that clamps the disk to the rotation drive unit. In
  The clamping means is, KuA lamp chassis, and a clamp arm rotatably supported by a clamp fulcrum that forms a rotation center line parallel to a surface of a disk loaded in the mechanism unit. And
  The clamp chassis is rotatably supported by an axis parallel to the rotation center line with respect to the mechanism unit, and the rotation fulcrum of the clamp chassis is driven to rotate more than the rotation fulcrum portion of the clamp arm. It is provided at a position close to the club side,
  The clamp arm sandwiches the pivot fulcrumThe rotation drive unitA clamper is rotatably provided at a tip portion that is a side, and a contact portion is provided at a base portion that is the other side, and the clamp arm is provided with the tip portionToward the rotary driveIt is energized by the energizing member,
  in frontThe contact part isOf the clamp chassisHit the fixed part located aboveThe clamp chassis rotates in the directionBySaidThe clamp armSaidIt can be turned away from the rotary drive,
  in frontThe contact part is separated from the fixed part.When the clamp chassis rotates in the directionThe clamper is brought into contact with the disk on the rotation driving unit by receiving a biasing force of the biasing member.
[0010]
In the disk device, in the subsequent stage when the clamp chassis moves upward, the contact portion of the clamp arm hits the fixed portion, and the clamp arm rotates in the clamp release direction. Therefore, the clamp arm is not greatly inclined so that the tip portion faces upward, and the apparatus can be thinned. Further, since the resistance force of the urging member does not act on the clamp chassis until the abutting portion hits the fixed portion, the load of the urging member that urges the clamp arm does not always act greatly on the clamp chassis. Therefore, the driving force required for releasing the clamp can be reduced.
[0013]
Moreover, it is preferable that the distance from the rotation fulcrum part to the contact part is shorter than the distance from the rotation fulcrum part of the clamp arm to the rotation center of the clamper.
[0014]
With this configuration, the clamper can be separated from the rotary drive unit for a long distance by simply contacting the contact part and the fixed part for a short time at the final stage of the clamp chassis moving upward, and the structure is further reduced in thickness. it can.
[0015]
Further, when the contact portion of the clamp arm is formed so as to protrude upward, the contact portion and the fixed portion can be reliably contacted.
[0016]
Furthermore, the said fixed part contributes to thickness reduction if it is the ceiling part inner surface of the said external chassis. However, the fixing portion may be a separate member provided in the external chassis.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
1 is an exploded perspective view showing a mechanism unit of the disk device of the present invention, FIG. 2 is a perspective view showing a state after the mechanism unit is assembled, and FIG. 3 is an exploded perspective view showing an external chassis of the disk device of the present invention. 4 is a perspective view showing a state after the assembly of the external chassis, FIG. 5 is a plan view showing a state after the mechanism unit and the external chassis are assembled, and FIG. 6 is a perspective view showing a transport state of the disc in the disc device. FIG. 10 to FIG. 10 are diagrams for explaining the operation when the disk device is shown from the side, FIG. 11 to FIG. 14 are diagrams for explaining the operation when the disc device is shown from the back side, and FIG. It is operation | movement explanatory drawing shown.
[0018]
The disc device 1 of the present invention can be loaded with a disc D such as a CD (compact disc) or a DVD (digital versatile disc). The disk device 1 is housed in a housing (not shown) having a size of 1DIN, for example, of a vehicle-mounted device. A nose portion (not shown) having a liquid crystal display panel and various switches is provided on the front surface of the housing, and a slit-like insertion opening extending in the width direction (X direction) is provided in the nose portion.
[0019]
As shown in FIGS. 1 and 3, the disk device 1 has a mechanism unit 2 and an external chassis 3 in which the mechanism unit 2 is accommodated. As shown in FIGS. 1 and 2, the mechanism unit 2 includes a lower chassis 4, an upper chassis 5, and a clamp chassis 6. As shown in FIG. 3, the external chassis 3 is composed of a lower base 7 and an upper base 8.
[0020]
As shown in FIG. 1, a rotation drive unit 11 is provided at the center of the lower chassis 4. The rotation drive unit 11 includes a spindle motor 12 shown in FIGS. 11 and 13 and a turntable 13 that is attached to a rotation shaft of the spindle motor 12 and on which a disk is placed.
[0021]
The lower chassis 4 is formed with side plates 4a and 4b bent on both sides thereof, and posture setting members 14 and 15 as posture setting means are rotatable on the side plates 4a and 4b with shafts 4c and 4d as fulcrums. It is supported. The posture setting members 14, 15 are formed in a plate shape along the side plates 4 a, 4 b, and are respectively provided closer to the front of the lower chassis 4. The posture setting members 14 and 15 have fitting portions 14e and 15e formed in a crank shape by forming step portions 14d and 15d behind the shafts 4c and 4d. The fitting portions 14e and 15e are located farther from the side plates 4a and 4b than the front of the posture setting members 14 and 15 by approximately the plate thickness.
[0022]
Abutting pieces 14a and 15a are formed on the upper front ends of the posture setting members 14 and 15, respectively, and abutting pieces 14b and 15b are integrally formed on the lower rear ends of the fitting portions 14e and 15e, respectively. Furthermore, insertion protrusions 14f and 15f are formed on the upper end of the center so as to protrude upward. Further, through holes 14c and 15c are formed at the tips of the posture setting members 14 and 15, respectively.
[0023]
In the lower chassis 4, an arcuate guide slot 16 is formed on one side plate 4 a behind the posture setting member 14, and an elongated rectangular cutout 19 is formed above the guide slot 16. ing.
[0024]
As shown in FIG. 1, L-shaped rotating arms 17a and 17b are provided on the front end sides of the lower chassis 4 on both sides. The rotating arms 17a and 17b are connected to each other by a plate portion 17c extending in the X direction. Further, shaft protrusions 17a1 and 17b1 are fixed to the front ends of the rotation arms 17a and 17b, and the shaft protrusions 17a1 and 17b1 are rotatable in rotation holes 5a and 5b formed in the front end side surface of the upper chassis 5. Has been inserted. The shaft projection 17a1 projects outward and is inserted into the rotation hole 5a from the inside, and the shaft projection 17b1 projects inward and is assembled from the outside into the rotation hole 5b.
[0025]
A roller 18 as a conveying means is provided at the rear end of the rotating arms 17a and 17b on the Y2 side. The roller 18 is made of a material having a high friction coefficient such as rubber, and is formed in a long cylindrical shape extending in the width direction (X direction). The diameter of the roller 18 is narrow at the middle portion and gradually increases toward both end portions. ing. A roller shaft 18a is inserted into the roller 18, and both end portions of the roller shaft 18a are rotatably supported by the rotating arms 17a and 17b and from the side surfaces of the rotating arms 17a and 17b. The roller shaft 18a protrudes toward the outer surface, and both ends of the roller shaft 18a are inserted so as not to come out into the through holes 14c and 15c formed in the posture setting members 14 and 15.
[0026]
The upper chassis 5 is formed by bending side plates 5c and 5d, and a connecting member 20 is provided on one side plate 5c. The connecting member 20 is formed of an elongated plate material, and a base end portion of the connecting member 20 is rotatably supported by the side plate 5c by a shaft 28. Further, a shaft hole 20a is formed at the tip of the connecting member 20, and a guide projection 21 is protruded and fixed between the shaft hole 20a and the shaft 28 serving as a rotation fulcrum.
[0027]
A fitting piece 22 is integrally formed on the side plate 5 c of the upper chassis 5. The fitting piece 22 is formed at the lower edge of the side plate 5c and has a trapezoidal cutout 22a. The shape of the notch 22a matches the shape of the fitting portion 14e of the posture setting member 14. Further, a connecting hole 23 is formed in the leg portion 22b behind the fitting piece 22. An insertion hole 24 extending in the Y direction is formed at the boundary between the side plate 5c and the fitting piece 22, and an insertion protrusion 14f formed on the posture setting member 14 can be inserted into the insertion hole 24. ing.
[0028]
Similarly, the other side plate 5 d of the upper chassis 5 is formed with a fitting piece 22 having an insertion hole 24, and an insertion protrusion 15 f formed on the posture setting member 15 is inserted into the insertion hole 24. It is possible.
[0029]
In the lower part of the upper chassis 5, detection pins 25, 25 are arranged in the front, and positioning pins 111, 112 described later are arranged in the rear, as shown in FIG. The front detection pins 25 and 25 detect the disk insertion and ejection operations, and the rear positioning pins 111 and 112 enable the disk to be positioned on the turntable 13 of the rotation drive unit 11. Further, when the disk is driven to rotate, all the guide pins are controlled so as not to contact the outer peripheral edge of the disk, and are set so as not to interfere with the recording and reproducing operations of the disk.
[0030]
The clamp chassis 6 has side plates 6a and 6b bent on both sides. Arm portions 30 and 31 are integrally formed at the lower ends of the side plates 6a and 6b, and a part of the arms protrudes forward. Support holes 32 a and 32 b are formed in the arms 30 and 31 in the center in the Y direction. In addition, an arcuate guide hole 33 is formed behind one arm portion 30 so as to penetrate therethrough. Further, an insertion hole 34a extending in the Y direction is formed at a connection portion between the one side plate 6a and the arm portion 30. In addition, connection holes 30a and 31a are formed at the tip portions of the arm portions 30 and 31, respectively.
[0031]
On the upper surface of the clamp chassis 6, a clamp arm 35 having a clamper 36 supported at the tip is supported at the center in the X direction. The clamp arm 35 is supported by the clamp chassis 6 so as to be pivotable in the vertical direction about the pivot fulcrum 35b. The rotating fulcrum portion 35b is provided with an elastic member 37 formed of a torsion coil spring, and the elastic member 37 causes the clamp arm 35 to have its tip portion on the Y1 side directed downward from the rotating fulcrum portion 35b. It is so energized.
[0032]
  AndClamp arm 35The clamper 36 is rotatably supported at the tip of the Y1 side. An abutting portion 35a that protrudes upward is provided at the rear end of the clamper 36 on the opposite side to the support side with the rotation fulcrum portion 35b interposed therebetween. In this embodiment, the clamp chassis 6, the clamp arm 35 and the clamper 36 constitute a clamp means.
[0033]
When the disk D is transferred in the Y2 direction within the mechanism unit 2, the clamper 36 is lifted upward so as to be separated from the turntable 13. When the disk D is carried into the mechanism unit 2 and positioned by the positioning pins 111 and 112 positioned rearward, the clamp arm 35 is rotated downward, and the clamper 36 is moved to the elastic member 37. The disc D is pressed against the turntable 13 by the urging force.
[0034]
As shown in FIG. 2, the clamp chassis 6 is assembled so as to be inserted into the upper chassis 5 from the rear. At this time, the clamp arm 35 is inserted below the top plate 5e of the upper chassis 5, and the connection is made. The member 20 is inserted from above the insertion hole 34a, and the guide protrusion 21 is slidably inserted into the guide hole 33. At this time, the protruding portion in front of the arm portion 30 is inserted into the inside of the fitting piece 22 of the upper chassis 5 and further inserted into the gap between the side plate 4 a of the lower chassis 4 and the posture setting member 14. The connecting holes 30a and 31a formed at the front portions of the arm portions 30 and 31 and the connecting holes 14g and 15g formed on the Y2 side of the shafts 4c and 4d in the posture setting members 14 and 15 respectively. Are connected by a connecting pin (not shown).
[0035]
Further, when the upper chassis 5 and the lower chassis 4 are connected, the connecting member 20 is inserted into the notch 19 and formed in the shaft hole 20a of the connecting member 20 and the lower chassis 4 as shown in FIG. The guide slot 16 is connected to the shaft portion 29. Further, a notch 22 a formed in the fitting piece 22 of the upper chassis 5 is placed on the fitting portions 14 e and 15 e of the posture setting members 14 and 15, and the insertion protrusion 14 f is inserted through the insertion hole 24. Further, the shaft protrusions 4 e formed on the side plates 4 a of the lower chassis 4 are inserted into the connection holes 23 of the upper chassis 5 and the support holes 32 a of the arm portion 30 of the clamp chassis 6.
[0036]
Accordingly, the lower chassis 4 and the upper chassis 5 are fixed to each other while being substantially parallel to each other and maintaining a distance therebetween, and the clamp chassis 6 is rotatably supported with the shaft protrusion 4e as a fulcrum. Further, the clamp chassis 6 and the posture setting members 14 and 15 are connected so as to rotate in opposite directions.
[0037]
The lower chassis 4, the upper chassis 5, and the clamp chassis 6 are similarly connected to the side surface on the X1 side of the disk device 1 except for the connecting member 20.
[0038]
As shown in FIGS. 3 and 4, the lower base 7 has side plates 7b and 7c bent vertically on both sides of a bottom plate 7a. On the top surface of the bottom plate 7a, elastic support members 40a, 40b, and 40c such as an oil damper, an air damper, and a coil spring are attached to the Y1 side center and the Y2 side in the X direction on both sides. As shown in FIGS. 8, 9, and 10, three support pins 42 extending downward are fixed to the lower chassis 4, and each support pin 42 is attached to the elastic support members 40a, 40b, and 40c. It is supported. Therefore, the entire mechanism unit 2 is elastically supported on the lower base 7. This elastic support prevents the vehicle body vibration from being directly transmitted to the mechanism unit 2 when the disk device 1 is used for in-vehicle use.
[0039]
The upper base 8 is formed by bending side plates 8b and 8c on both sides of the top plate 8t, and mounting pieces 8d, 8d, 8d and 8d are formed at the ends of the side plates 8b and 8c on the Y1 and Y2 sides, respectively. ing. Each attachment piece 8d is fixed to the side plates 7b, 7c of the lower base 7.
[0040]
The upper base 8 is formed with a plurality of support pieces 9a, 9b, 9c, 9d, 9e, 9f, 9g. Each of the support pieces 9a to 9d is bent vertically inward in the Z2 direction, and its tip is slightly bent outward (X1-X2 side). Each of the support pieces 9e and 9f is bent perpendicularly to the Z2 direction, and its tip is slightly bent outward (Y2 side). The support piece 9g is bent vertically inward in the Z2 direction, and its tip is bent slightly inward (Y1 side). Furthermore, as shown in FIGS. 5, 8, and 10, a fixing piece (fixing portion) 9h that is bent in a step shape in the Z2 direction is provided at the approximate center of the upper base 8 on the Y2 side. .
[0041]
The mechanism unit 2 is provided inside the external chassis 3 thus formed, and is elastically supported by the elastic support members 40a, 40b, and 40c.
[0042]
11 and 12 are perspective views of the mechanism unit 2 in which the lower chassis 4, the upper chassis 5 and the clamp chassis 6 are assembled as described above, as seen obliquely from below, and FIGS. 13 and 14 are the same parts. It is a bottom view. As shown in FIG. 11, in the disk device 1 according to the present embodiment, switching means having a motor M is provided on the back side of the lower chassis 4, and the power of the motor M is changed by this switching means to the optical head. As a driving force for moving the disk 18 along the radial direction of the disk D and a driving force for rotating the roller 18 when the disk is conveyed.
[0043]
As shown in FIG. 13, a power transmission member 10 is supported on the back side of the lower chassis 4 so as to be movable in the Y direction. The power transmission member 10 has a plate portion 10a parallel to the side plate 4a and a plate portion 10b perpendicular to the plate portion 10a, and is formed in an L shape. A rack 10c is formed on the Y1 side of the plate portion 10b. Yes. The rack 10c meshes with the drive gear 50a. The drive gear 50a rotates around the central axis 61a of the attitude control member 61 shown in FIGS. 17 to 19 and rotates together with the attitude control member 61.
[0044]
As shown in FIG. 15, a long hole 10d extending in the Z direction is formed in the plate portion 10a of the power transmission member 10, and the shaft hole 20a of the connecting member 20 and the lower chassis are formed in the long hole 10d. The shaft portion 29 linking the guide elongated hole 16 formed in 4 is slidably inserted. When the power transmission member 10 is moved in the Y direction, a moving force in the Y direction is given to the shaft portion 29 by the elongated hole 10d, and the connecting member 20 is formed in the guide length formed in the lower chassis 4. It rotates while being guided by the hole 16.
[0045]
The guide elongated hole 16 formed in the side plate 4 a of the lower chassis 4 is formed along a constant radius locus centering on the shaft 28 that is the pivot point of the connecting member 20. On the other hand, the guide hole 33 formed in the arm portion 30 of the clamp chassis 6 has a Y2 side end at a distance from the shaft 28 and a Y1 side end at a distance from the shaft 28. Therefore, when the connecting member 20 is rotated counterclockwise as shown in FIG. 7, the clamp chassis 6 is rotated counterclockwise with the shaft protrusion 4e as a fulcrum, and as shown in FIG. When 20 rotates clockwise, the clamp chassis 6 rotates clockwise.
[0046]
Next, the switching means will be described.
As shown in FIG. 13, the lower chassis 4 of the mechanism unit 2 has an optical head H having an objective lens, and a head transfer that moves the optical head H along the recording surface of the disk D in the radial direction of the disk D. Means 50 are provided.
[0047]
The head transfer means 50 includes a guide shaft 51 that movably supports the optical head H and a screw shaft 52 that applies a moving force to the optical head H. The optical head H has a head base Hb. A drive hole 53a is formed in the head base Hb. The drive hole 53a is externally inserted into the screw shaft 52, and is formed in the drive hole 53a. A latching portion such as a female screw portion is engaged with the thread groove of the screw shaft 52. Therefore, when the screw shaft 52 is rotated, the optical head H is moved in the radial direction of the disk D.
[0048]
As shown in FIG. 11, a motor M is fixed to the lower chassis 4, and a worm gear m <b> 1 is fixed to an output shaft of the motor M. On the lower surface of the lower chassis 4, there is provided a two-stage gear 54 in which a spur-like large-diameter gear 54a and a small-diameter gear 54b which is a worm wheel are integrally formed, and the small-diameter gear 54b meshes with the worm gear m1. Yes. As shown in FIGS. 13 and 16, a small gear 52 a that is a worm wheel is fixed to one end of the screw shaft 52 constituting the head transfer means 50. On the side thereof, there is provided a two-stage gear 55 in which a small-diameter gear 55b, which is a worm gear meshing with the small gear 52a, and a spur-shaped large-diameter gear 55a are integrally formed.
[0049]
A swing arm 71 that constitutes a part of the switching means 70 is provided between the second gear 54 and the second gear 55.
[0050]
As shown in FIG. 13, the swing arm 71 is formed in a substantially fan shape, and is rotatably supported by the lower chassis 4 with a shaft 71a as a fulcrum. Between the swing arm 71 and the lower chassis 4, there is provided a spur-like drive gear 72 that is rotatably supported by the shaft 71a. The drive gear 72 is always meshed with the large-diameter gear 54 a of the two-stage gear 54, and the power of the motor M is transmitted to the drive gear 72 via the two-stage gear 54.
[0051]
A spur-like switching gear 73 directed to the two-stage gear 55 is rotatably supported on the swing arm 71, and the switching gear 73 is always meshed with the drive gear 72. Further, on the swing arm 71, a spur-like switching gear 74 that always meshes with the drive gear 72 at another position is rotatably supported. When the drive gear 72 is driven, both the switching gear 73 and the switching gear 74 meshed with the drive gear 72 are simultaneously rotated. The rotational power of the drive gear 72 is selectively transmitted to the two-stage gear 55 and a later-described second-stage gear 56 by the swinging operation of the swing arm 71.
[0052]
As shown in FIG. 16, the swing arm 71 is integrally formed with a lock protrusion 75 that protrudes in the opposite direction to the side where the gears 72, 73, 74 are disposed. The lower chassis 4 is provided with a substantially fan-shaped lock control plate 80 at a position partially overlapping with the swing arm 71, and the lock control plate 80 is rotated around a shaft 81 fixed to the lower chassis 4. It is supported freely. The lock control plate 80 is biased counterclockwise by a spring (not shown). A rectangular lock recess 80 a is cut out at the peripheral edge of the lock control plate 80. The lock control plate 80 is formed with a regulating piece 80b that closes a part of the lock recess 80a.
[0053]
In the space between the lock control plate 80 and the moving area of the optical head H, a switching arm 90 that constitutes a part of switching means is provided, and this switching arm 90 is provided on the bottom plate of the lower chassis 4. A fixed shaft 93 is rotatably supported. The switching arm 90 has a boomerang shape and includes an input arm 91 extending toward the optical head H and an output arm 92 extending toward the lock control plate 80. The distal end of the input arm 91 is positioned so as to overlap with the screw shaft 52 and within the moving region of the optical head H. Further, a pressing projection 92 a is formed on the tip portion of the output arm 92 in the Z1 direction, and the pressing projection 92 a extends to a position corresponding to the side surface 80 c serving as a pressed portion of the lock control plate 80.
[0054]
A control means 60 is provided in the vicinity of the lock control plate 80. In this control means 60, a central shaft 61 a is fixed to the bottom plate of the lower chassis 4. The two-stage gear 62 is rotatably supported on the Z1 side of the central shaft 61a, and the attitude control member 61 is rotatably supported on the Z2 side. The two-stage gear 62 and the attitude control member 61 can rotate independently of each other. The two-stage gear 62 is integrally formed with a spur-shaped small gear 62a (see FIG. 17) on the side close to the attitude control member 61 and a spur-shaped large gear 62b on the far side.
[0055]
As shown in FIGS. 12 and 13, the drive gear 50a meshing with the rack 10c of the power transmission member 10 is located between the two-stage gear 62 and the lower chassis 4, and the drive gear 50a is in the posture. It is connected so that it can rotate integrally with the control member 61.
[0056]
As shown in FIG. 16, in the space between the switching gear 74 provided on the swing arm 71 and the two-stage gear 62, a reduction gear train comprising a pair of two-stage gears 56 and 57 is provided. Is provided. One two-stage gear 56 is formed by integrally forming a spur-like small-diameter gear 56 a and a large-diameter gear 56 b, and faces a position where the small-diameter gear 56 a can mesh with the switching gear 74. In the other two-stage gear 57, a small diameter gear 57a and a large diameter gear 57b are integrally formed, and the large diameter gear 57b meshes with the small diameter gear 56a. The small-diameter gear 57a meshes with the large gear 62b of the two-stage gear 62.
[0057]
As shown in FIG. 17, the control means 60 is provided with a planetary gear 63 that meshes with the small gear 62a. A rotation shaft 63 a that rotatably supports the planetary gear 63 is fixed to the attitude control member 61.
[0058]
As shown in FIG. 16, a rack member 64 having an internal gear is provided at a position facing the outside of the large gear 62 b of the two-stage gear 62. The rack member 64 is pivotable about a fixed rack 64a which is a fixed internal gear fixed to the lower chassis 4 and a shaft 65 fixed to the lower chassis 4 at a position aligned with the fixed rack 64a. And a movable rack 64b which is a movable internal gear. The fixed rack 64a is fixed at a position that meshes with the planetary gear 63 that moves around the small gear 62a, and the movable rack 64b is in a transmission attitude that meshes with the planetary gear 63 and a retracted attitude that leaves the planetary gear 63. Can be rotated between. When the movable rack 64b is in a position where it can mesh with the planetary gear 63, the internal teeth of the fixed rack 64a and the internal teeth of the movable rack 64b are positioned on a continuous arc.
[0059]
A guide groove 66 is provided on the Z2 side surface of the attitude control member 61. The guide groove 66 is continuous with a retraction guide path 66a formed along an arc locus centering on the center axis 61a on the inner peripheral side near the center axis 61a and one end of the retraction guide path 66a. And an operation guide path 66b extending in a direction away from the central axis 61a. In the guide groove 66, a standby guide path 66c extending along an arc locus centering on the central axis 61a is continuously formed at a position facing the motion guide path 66b.
[0060]
Further, the guide groove 66 is positioned on the outer peripheral side farther from the central axis 61a than the operation guide path 66b and the standby guide path 66c and extends along an arc locus centering on the central axis 61a. A path 66d is provided, and a part of the lock guide path 66d faces the standby guide path 66c. Further, an introduction guide path 66e extending outward from one end of the lock guide path 66d and communicating with the outside of the attitude control member 61 is formed.
[0061]
As shown in FIG. 17, another guide groove 67 is formed on the Z2 side surface of the attitude control member 61 together with the guide groove 66. The guide groove 67 includes a transmission guide path 67a formed along an arc locus centering on the central axis 61a, and a retraction guide extending continuously from one end of the transmission guide path 67a in a direction away from the central axis 61a. Path 67b.
[0062]
As shown in FIG. 16, an arm portion 68 that extends so as to overlap the surface on the Z2 side of the attitude control member 61 is integrally formed at the tip of the movable rack 64b. A guide projection 68a is formed at the tip of the arm portion 68 in the Z1 direction, and the guide projection 68a is inserted into the guide groove 67.
[0063]
A drive arm 69 is rotatably supported on the shaft 65 that supports the movable rack 64b. A drive gear G1 is rotatably supported on the shaft 65. The drive gear G1 is located between the bottom plate of the lower chassis 4 and the movable rack 64b. As shown in FIG. 17, the drive gear G1 is a two-stage gear integrally formed with a small-diameter gear G1a, and the small-diameter gear G1a is always meshed with the large gear 62b of the two-stage gear 62.
[0064]
The drive arm 69 has a first arm 69a extending to a position overlapping the Z2 side surface of the attitude control member 61 and a second arm 69b extending to the roller 9 side. A guide protrusion 69a1 is formed at the tip of the first arm 69a in the Z1 direction and is inserted into the guide groove 66. A reduction gear G2 that meshes with the large gear G1b of the drive gear G1 is rotatably supported at the tip of the second arm 69b.
[0065]
The first arm 69a and the second arm 69b are formed as separate bodies, and both are rotatably supported by the shaft 65. Further, the first arm 69a and the second arm 69b are attracted to each other by a spring 69c, and both the arms 69a and 69b are latched to each other so as to be stable at a relative angle shown in FIG. When the drive arm 69 rotates counterclockwise and the reduction gear G2 meshes with the reduction gear G3, the meshing pressure is exerted by the elastic force of the spring 69c.
[0066]
The reduction gear G3 is rotatably supported on a shaft fixed to the bottom plate of the lower chassis 4. A power transmission portion Ga is formed by the reduction gear G3, the reduction gears G4 and G5 meshing with the reduction gear G3, and the connecting gear G6 having a helical gear. A gear G7 is fixed to one end of the roller shaft of the roller 18. As shown in FIG. 9, when the roller 18 is lifted in the Z1 direction and assumes the conveying force transmission posture, the gear G7 provided on the roller shaft 18a and the communication gear G6 are engaged with each other. .
[0067]
The lock control plate 80 is integrally formed with an arm portion 82 that overlaps the Z2 side surface of the attitude control member 61. A guide projection 82a facing in the Z1 direction is formed at the tip of the arm portion 82, and the guide projection 82a can be inserted into the guide groove 66.
[0068]
As shown in FIG. 17, the arm 68 provided at the tip of the movable rack 64b is formed with a connecting projection 68b protruding in the Z2 direction. The connection protrusion 68b is inserted into a connection hole 100a formed at one end of the rack control bar 100 extending in the Y direction. The rack control bar 100 is always urged in the Y1 direction by an urging member 102 such as a torsion coil spring.
[0069]
A shaft 104 is fixed to the back surface of the lower chassis 4, and a small arm 105 is rotatably supported on the shaft 104. A connecting shaft 106 provided at the end of the rack control bar 100 on the Y2 side is inserted into the connecting hole 105a opened in the small arm 105.
[0070]
As shown in FIG. 2, a pair of positioning arms 108 and 109 are rotatably provided on the top plate 5e of the upper chassis 5 on the left and right. A positioning pin 111 extending in the Z2 direction is provided at the distal end of the positioning arm 108, and a positioning pin 112 extending in the Z2 direction is provided at the distal end of the positioning arm 109. The positioning pins 111 and 112 are provided in the mechanism unit 2. It extends on the transfer path of the disk D.
[0071]
When the disk D is not being conveyed, the positioning arm 108 and the positioning arm 109 are biased by a spring so as to approach each other. When the disk D is conveyed in the Y2 direction by the roller 18, the positioning pins 111 and 112 are pushed by the outer peripheral edge of the disk D, and the positioning arms 108 and 109 are rotated in the opening direction. Then, when the distance between the positioning arm 108 and the positioning arm 109 is maximized, the disk D is positioned so that the center hole of the disk D contacting the positioning pins 111 and 112 coincides with the center of the turntable.
[0072]
As shown in FIG. 18, a trigger arm 113 that is rotated by one positioning arm 109 is provided in the mechanism unit 2. The trigger arm 113 rotates about a shaft 114 as a fulcrum. The trigger arm 113 is formed with an elongated hole 113a, and a pin 109a provided on the positioning arm 109 is slidably inserted into the elongated hole 113a. A trigger pin 107 is attached to the trigger arm 113, and the trigger pin 107 is slidably inserted into a long hole 105 b formed in the small arm 105.
[0073]
When the disk D is not loaded, the positioning arms 108 and 109 rotate so as to approach each other, and the trigger arm 113 rotates counterclockwise when viewed from the back side of the lower chassis 4. The small arm 105 is rotated counterclockwise by the trigger arm 113 as shown in FIG. When the disk D is transported, the positioning arms 108 and 109 rotate in a direction away from each other, so that the trigger arm 113 is rotated in the clockwise direction when viewed from the back surface of the lower chassis 4. Is rotated clockwise as shown in FIGS.
[0074]
Next, the operation of the disk device 1 will be described.
(Disk drive state)
7 and 8 show a state in which the disk D is loaded in the rotation drive unit 11 and the reproduction process and the recording process are executed.
[0075]
In this state, since the power transmission member 10 shown in FIGS. 13 and 15 is moved in the Y1 direction, the connecting member 20 is rotated counterclockwise as shown in FIG. The guide hole 33 formed in the clamp chassis 6 is located at the end on the Y1 side. Therefore, the clamp chassis 6 is rotated counterclockwise around the shaft protrusion 4e through which the support hole 32a is inserted.
[0076]
As described above, the clamp arm 35 supporting the clamper 36 is pressed against the upper surface of the clamp chassis 6 by the urging force of the elastic member 37 of the torsion spring. In addition, the upper surface is located on the Y2 side with respect to the shaft protrusion 4e which is a rotation fulcrum. Therefore, when the clamp chassis 6 rotates counterclockwise, the clamp arm 35 approaches the lower chassis 4, and the clamper 36 is pressed against the disk on the turntable 13 while receiving the urging force of the elastic member 37. It has been.
[0077]
Further, the connection holes 14g and 15g of the posture setting member 14 and the posture setting member 15 and the connection holes 30a and 31a at the tip of the arm portion 30 and the arm portion 31 of the clamp chassis 6 are connected to each other by a connection pin (not shown). Since they are connected, as shown in FIG. 7, when the clamp chassis 6 is rotated counterclockwise, the posture setting members 14 and 15 are rotated clockwise around the shaft 4c. And the fitting part 14e of the attitude | position setting member 14 fits into the notch part 22a of the fitting piece 22 formed in the upper chassis 5. FIG.
[0078]
As the posture setting members 14 and 15 rotate in the clockwise direction, the rotation arms 17a and 17b connected to the posture setting members 14 and 15 are shown in FIG. 7 with the shaft protrusions 17a1 and 17b1 as fulcrums. Is rotated counterclockwise. Accordingly, the roller 18 supported by the rotating arms 17a and 17b is in a retracted position away from the disk D.
[0079]
7 and 8, the entire mechanism unit 2 having the clamp chassis 6 and the posture setting members 14 and 15 does not come into contact with any of the inner surfaces of the external chassis 3, and the elastic support members 40a and 40b. , 40c are elastically supported in the outer chassis 3.
[0080]
In the reproduction or recording operation, as shown in FIG. 17, the attitude control member 61 is rotated clockwise, and the optical head H moves in a region where it does not hit the input arm 91. Accordingly, the lock control plate 80 is rotated counterclockwise by a biasing force of a spring (not shown), and the pressing projection 92a is pushed by the side surface 80c of the lock control plate 80, and the switching arm 90 is rotated clockwise. It has been made. Further, the lock projection 75 of the swing arm 71 is positioned in the lock recess 80a formed in the lock control plate 80 and is held so as not to come out by the restricting piece 80b. As a result, the swing arm 71 maintains the state of being rotated clockwise in FIG. 17, and the switching gear 73 of the swing arm 71 is engaged with the large-diameter gear 55 a of the two-stage gear 55. The other switching gear 74 is separated from the large diameter gear 56b.
[0081]
Therefore, the power from the motor M is transmitted to the small gear 52a via the two-stage gear 54, the drive gear 72, the switching gear 73, and the two-stage gear 55, and the screw shaft 52 is rotated. By the rotational force of the screw shaft 52, the optical head H is moved in a direction approaching and separating from the rotation drive unit 11, that is, in a radial direction of the disk D. Then, the disk D is rotationally driven by the spindle motor 12 and the optical head H is moved in the radial direction of the disk D to record a signal on the disk D or reproduce a signal from the disk D. In the recording or reproducing operation, the recording area of the disk D is scanned by the laser focused by the objective lens provided in the optical head H. However, when the optical head H moves in this scanning range, the optical head H does not hit the input arm 91 of the switching arm 90.
[0082]
Further, since the power from the motor M is not transmitted to the large-diameter gear 56b of the two-stage gear 56 shown in FIGS. 12 and 13, the driving force is transmitted to the two-stage gear 57, the two-stage gear 62, and the drive gear 50a. The power transmission member 10 remains positioned on the Y1 side. Therefore, the connection member 20 maintains the state rotated counterclockwise as shown in FIG.
[0083]
(Disc eject operation)
When the reproducing process and the recording process of the disk D are completed and the disk D is ejected, the optical head H is moved to the inner peripheral side by the motor M. At this time, the optical head H is moved to the movement limit position A on the inner peripheral side as shown in FIG.
[0084]
In the reproducing or recording operation shown in FIG. 17, the tip of the input arm 91 is at a position protruding from the movement limit position A toward the optical head H, but when the optical head H moves to the movement limit position A as described above. The input arm 91 is pressed by the head base Hb of the optical head H, and the switching arm 90 is rotated counterclockwise.
[0085]
As shown in FIG. 18, when the switching arm 90 is rotated counterclockwise, the side surface 80c of the lock control plate 80 is pushed by the pressing protrusion 92a of the output arm 92, and the lock control plate 80 is rotated clockwise. It is done.
[0086]
First, the restriction piece 80b of the lock control plate 80 is detached from the lock protrusion 75 of the swing arm 71, and the restriction of the lock protrusion 75 by the lock recess 80a is released. The drive gear 72 is started counterclockwise by the motor M, and the switching gear 73 is rotated clockwise. Therefore, by the reaction force of the force that the teeth of the switching gear 73 exert on the teeth of the large-diameter gear 55a, the swing arm 71 that has been released from the restraint is rotated counterclockwise, and the switching gear 73 is moved from the large-diameter gear 55a. The other switching gear 74 is engaged with the large-diameter gear 56 b of the two-stage gear 56. At this time, the lock projection 75 of the swing arm 71 comes out of the lock recess 80a, and the switching gear 74 meshes with the large-diameter gear 56b.
[0087]
Thereafter, the power of the motor M is transmitted from the drive gear 72 to the two-stage gears 56 and 57 via the switching gear 74. Further, the transmission is transmitted from the small diameter gear 57a of the second gear 57 to the large gear 62b of the second gear 62, and the large gear 62b is rotated counterclockwise. Since the planetary gear 63 meshes with the small gear 62a that rotates together with the large gear 62b, the planetary gear 63 rotates clockwise. In addition, since the planetary gear 63 rotates while meshing with the fixed rack 64a, the attitude control member 61 integrated with the rotation shaft 63a of the planetary gear 63 is rotated counterclockwise.
[0088]
When the posture control member 61 starts to move counterclockwise, the guide protrusion 82 a provided on the arm portion 82 integral with the lock control plate 80 is introduced into the guide groove 66 e of the guide groove 66 formed in the posture control member 61. To the lock guide path 66d. By this guiding operation, the lock control plate 80 is further rotated in the clockwise direction so that the lock protrusion 75 rides on the curved surface 80d of the lock control plate 80 so that the lock protrusion 75 does not return to the lock recess 80a. . Therefore, the swing arm 71 is restricted from rotating clockwise. Thereafter, while the attitude control member 61 rotates counterclockwise, the guide protrusion 82a is guided while sliding on the lock guide path 66d. The lock guide path 66d has a constant radius from the central axis 61a. Since it is an arc locus, the lock control plate 80 is held in a state of being rotated clockwise, and the state in which the switching gear 74 and the large-diameter gear 56b are engaged with each other is maintained.
[0089]
When the attitude control member 61 rotates counterclockwise, the drive gear 50a is also rotated counterclockwise together with the attitude control member 61. When the drive gear 50a rotates counterclockwise, the power transmission member 10 shown in FIGS. 13 and 15 is moved in the Y2 direction. The connecting member 20 is rotated clockwise by the elongated hole 10d of the power transmission member 10. When the guide protrusion 21 provided on the connecting member 20 moves the guide hole 33 of the clamp chassis 6 from the Y1 side to the Y2 side, the clamp chassis 6 is rotated clockwise with the shaft protrusion 4e as a fulcrum.
[0090]
When the clamp chassis 6 rotates clockwise, as shown in FIG. 6, the rear end 6c of the clamp chassis 6 is lifted in the Z1 direction, and the rear end 6c contacts the inner surface of the upper base 8. As shown in FIG. 10, the contact portion 35 a of the clamp arm 35 located on the rear side (Y 2) with respect to the pivot fulcrum of the clamp arm 35 on the clamp chassis 6 is the inner surface of the fixed piece 9 h of the upper base 8. Since the clamp arm 35 is brought into contact with the (lower surface), the clamp arm 35 is rotated counterclockwise about the rotation fulcrum 35b with the clamp chassis 6, and the clamper 36 is moved upward from the disk D on the turntable 13. Be released. Accordingly, the clamp of the disk D is released.
[0091]
Further, when the clamp chassis 6 is rotated in the clockwise direction, the posture setting members 14 and 15 connected to the clamp chassis 6 are rotated in the counterclockwise direction about the shaft 4c. By this operation, the mechanism unit 2 is restrained so as not to move in the external chassis 3.
[0092]
First, as shown in FIG. 9 and FIG. 10, the clamping chassis 6 rotates clockwise and the rear end 6 c comes into contact with the inner surface of the upper base 8 and moves upward of the mechanism unit 2. Movement is restricted. Further, both side surfaces of the rear end portion 6c of the clamp chassis 6 are sandwiched between a support piece 9c and a support piece 9d (also shown in FIG. 5), and movement of the mechanism unit 2 in the X direction is restricted. Further, the support pieces 9f and 9e of the upper base 8 are inserted into the notches 6d and 6e formed on the upper surface of the clamp chassis 6, and the support piece 9g is further inserted into the notch 6f of the clamp chassis 6. . Therefore, the rear end portion 6c of the clamp chassis 6 is sandwiched between the support pieces 9f and 9e and the support piece 9g, and the movement of the mechanism unit 2 in the Y direction is restricted.
[0093]
As shown in FIG. 9, when the posture setting member 14 rotates counterclockwise, the contact piece 14a at the Y1 side end comes into contact with the inner surface 8a of the upper base 8, and the Y2 side contact piece 14b. Is in contact with the bottom plate 7a of the lower base 7, and the mechanism unit 2 is restricted from moving in the up-down direction Z. Similarly, the movement of the posture setting member 15 in the Z direction is also restricted. At this time, a part of the contact pieces 14a and 15a intervenes inside the support pieces 9a and 9b formed by bending the upper base 8, so that the mechanism unit 2 is moved in the X direction via the posture setting members 14 and 15. It is regulated so that it will not move.
[0094]
As described above, the clamp chassis 6 and the posture setting members 14 and 15 are in contact with the lower base 7 and the upper base 8, respectively, so that the entire mechanism unit 2 having the rotation drive unit 11 is in the X direction, the Y direction, and the Z direction. The movement in all directions is restricted.
[0095]
As shown in FIG. 10, when the clamp chassis 6 rotates clockwise, the rotating arms 17a and 17b rotate clockwise, and the rollers 18 supported by the rotating arms 17a and 17b lift up. Thus, the state is set so as to contact the lower surface of the disk D and transmit the conveying force from the roller 18 to the disk D.
[0096]
Here, in the process in which the posture control member 61 rotates counterclockwise from the position shown in FIG. 17 to reach FIG. 18, the guide protrusion 69a1 provided on the first arm 69a of the drive arm 69 is shown in FIG. As shown, it is first positioned on the retraction guide path 66a. Since the retraction guide path 66a is located on an arc trajectory centered on the central axis 61a, the drive arm 69 is not rotated while the attitude control member 61 is rotated counterclockwise, and the vehicle is decelerated. Gear G2 remains away from reduction gear G3. However, when the attitude control member 61 rotates counterclockwise to the position shown in FIG. 18, the guide protrusion 69a1 is drawn into the operation guide path 66b from the retraction guide path 66a, and the drive guide arm 66b moves the drive arm. 69 is rotated counterclockwise. Therefore, the reduction gear G2 provided on the second arm 69b is meshed with the reduction gear G3 of the power transmission unit Ga.
[0097]
Then, the rotational force of the large gear 62b is transmitted from the drive gear G1 to the communication gear G6 via the power transmission unit Ga. Further, power is transmitted to the gear G7 meshed with the connecting gear G6 at that time, and the roller 18 rising to a position where it contacts the disk D is rotated in the disk ejection direction. Accordingly, the disc D whose clamp has been released is conveyed toward the insertion port of the housing by the rotational force of the roller 18.
[0098]
When the attitude control member 61 is rotated to FIG. 18, the planetary gear 63 is detached from the fixed rack 64a. However, at this time, the guide protrusion 68 a provided at the front portion of the movable rack 64 b is located in the transmission guide path 67 a of the guide groove 67. Since the transmission guide path 67a is located on an arc locus centering on the central axis 61a, the movable rack 64b is located on the same arc as the fixed rack 64a. Therefore, the planetary gear 63 moves counterclockwise while being engaged with the movable rack 64b after being removed from the fixed rack 64a.
[0099]
During this time, the guide protrusion 82a provided on the lock control plate 80 is moved to the end of the lock guide path 66d. Further, the guide protrusion 69a1 provided on the drive arm 69 is moved away from the operation guide path 66b to the standby guide path 66c. Since the standby guide path 66c is located on an arc locus centering on the central axis 61a, the drive arm 69 maintains the engagement between the reduction gear G2 and the reduction gear G3.
[0100]
Further, when the attitude control member 61 is further rotated counterclockwise from the position of FIG. 18, the guide protrusion 68 a provided on the movable rack 64 b reaches a position facing the retreat guide path 67 b at the end of the guide groove 67. At this time, since the disk D is transferred by a certain distance in the Y2 direction by the rotational force of the roller 18 driven by the motor M, the outer peripheral edge of the disk D is separated from the positioning pin 112, and the positioning arm 109 Can be rotated clockwise in FIG. Therefore, the trigger arm 113 linked to the positioning arm 109 is also rotatable in the counterclockwise direction in FIG. 18, and the small arm 105 connected to the trigger arm 113 via the trigger pin 107 is also counterclockwise. It can be turned in the direction. Further, the rack control bar 100 receiving the urging force of the urging member 102 is also movable in the Y1 direction.
[0101]
Therefore, as shown in FIG. 19, the guide protrusion 68a enters the retraction guide path 67b by the urging force of the urging member 102, and the attitude control member 61 is locked so as not to rotate at that position. Further, the movable rack 64 b is rotated to a position away from the planetary gear 63 by the rack control bar 100. Therefore, when the large gear 62b is subsequently rotated, the planetary gear 63 meshed with the small gear 62a merely rotates while stopped at that position.
[0102]
When the attitude control member 61 is locked in this way, the drive gear 50a stops, so that the power transmission member 10 is also locked without moving at the position shown in FIG. Therefore, the clamp chassis 6, the posture setting members 14, 15 and the rotating arms 17a, 17b maintain the state shown in FIG. Accordingly, the roller 18 is stopped in a conveying force transmission posture that hits the disk D.
[0103]
Even after the attitude control member 61 is locked as shown in FIG. 19, the two-stage gear 62 can be driven by the power of the motor M. In FIG. 19, since the posture control member 61 is locked, the reduction gears G <b> 2 and G <b> 3 are kept engaged by the drive arm 69. Therefore, when the motor M is driven, the power is transmitted from the two-stage gear 62 to the roller 18 through the power transmission unit Ga. Therefore, only the roller 18 is driven while maintaining the state of FIG. 9 in the entire mechanism, and the disk D can be carried out toward the insertion slot.
[0104]
(Disc loading operation)
A standby state in which the disk D is ejected is shown in FIG. At this time, as shown in FIGS. 9 and 10, the clamp chassis 6 and the posture setting members 14 and 15 are rotated in opposite directions, and the mechanism unit 2 is locked in the external chassis 3. At this time, a space for guiding the disk D from the insertion port onto the turntable 13 is formed. The roller 18 can contact the disk D and is in a position where the disk D can be conveyed. The power of the motor M can be transmitted only to the roller 18 via the two-stage gear 62.
[0105]
In the standby state, as shown in FIG. 19, the guide protrusion 82a of the lock control plate 80 is held by the lock guide path 66d, and the lock control plate 80 is rotated clockwise. In addition, the optical head H moves to the movement limit position A and the switching arm 90 rotates counterclockwise. At this time, the optical head H is located between the pressing protrusion 92a of the switching arm 90 and the side surface 80c of the lock control plate 80. Is formed with a gap δ.
[0106]
When it is detected that the disk D is inserted from the insertion port of the housing, the motor M is started. As a means for detecting the insertion of the disk D, a pair of detection pins 25, 25 (see FIG. 1) are provided on the insertion port side of the mechanism unit 2, and the distance between the detection pins 25 and 25 is the diameter of the disk D. It is detected that the disc D is inserted by the disc D coming into contact with the detection pins 25 and 25 and the detection pins 25 and 25 being expanded to a predetermined position.
[0107]
When the insertion of the disk D is detected, the drive gear 72 is driven by the power of the motor M. At this time, the rotation direction of the drive gear 72 is clockwise (CW) in FIG. This rotational force is transmitted from the switching gear 74 to the large gear 62b of the control means 60 via the two-stage gears 56 and 57, and the large gear 62b is driven in the clockwise direction. The power of the large gear 62b is transmitted from the drive gear G1 to the gear G7 via the power transmission portion Ga, and the roller 18 is driven in the direction in which the disk D is carried.
[0108]
The disk D is fed into the mechanism unit 2 of the disk device 1 by the rotational force of the roller 18. The outer peripheral edge of the disk D being fed hits the positioning pins 111 and 112 at the positions shown in FIG. 6, and the positioning pins 111 and 112 are pushed in the Y2 direction by the transfer force of the disk D, and the positioning arm 108 is moved. It is rotated in the clockwise direction, and the positioning arm 109 is rotated in the counterclockwise direction. When the center hole of the disk D coincides with the turntable 13 of the rotary drive unit 11, the positioning arms 108 and 109 rotate to the final position in the direction away from each other, and the disk D has the center hole in the turntable 13 Positioning is performed in accordance with
[0109]
As shown in FIG. 2, when the positioning arm 109 rotates counterclockwise to the final position and the disk D is positioned as described above, the trigger arm 113 is rotated clockwise in FIG. The small arm 105 connected to the trigger arm 113 and the trigger pin 107 is rotated clockwise from the state of FIG. 19 to reach the state of FIG.
[0110]
When the small arm 105 rotates in the clockwise direction, the rack control bar 100 is moved in the Y2 direction, and the movable rack 64b is rotated in the counterclockwise direction to mesh with the planetary gear 63. Further, the guide protrusion 68a comes out of the retraction guide path 67b and the posture control member 61 is unlocked. As described above, the large gear 62b rotates clockwise, the small gear 62a rotates clockwise together with the large gear 62b, and the planetary gear 63 rotates counterclockwise. When 63 and the movable rack 64b mesh with each other, the posture control member 61 is rotated clockwise.
[0111]
The operation at this time is a reverse operation from FIG. 19 to FIG. In the clockwise rotation operation of the attitude control member 61 at this time, the guide projection 68a provided on the movable rack 64b is positioned on the transmission guide path 67a, and the movable rack 64b is engaged with the planetary gear 63. maintain.
[0112]
Further, while the attitude control member 61 rotates from FIG. 18 to FIG. 17, the guide protrusion 69a1 provided on the drive arm 69 reaches the retraction guide path 66a from the standby guide path 66c through the operation guide path 66b. During this time, the drive arm 69 rotates clockwise, the reduction gear G2 is separated from the reduction gear G3, the rotational force from the large gear 62b is not transmitted to the roller 18, and the roller 18 stops.
[0113]
Further, since the attitude control member 61 rotates in the clockwise direction, the drive gear 50a rotates in the clockwise direction, and the power transmission member 10 is driven in the Y1 direction. Therefore, as shown in FIG. 7, the connecting member 20 is rotated counterclockwise by the power transmission member 10, and the clamp chassis 6 is rotated counterclockwise as shown in FIG. 6 separates from the inner surface 8a of the upper base 8 downward. Accordingly, the contact portion 35a of the clamp arm 35 is separated from the fixed piece 9h of the upper base 8, and the clamp arm 35 is rotated clockwise. Therefore, the disk D is held between the turntable 13 by the urging force of the clamper 36.
[0114]
Further, the posture setting members 14 and 15 are rotated clockwise by the rotational force of the clamp chassis 6, and the roller 18 is separated from the disk D as shown in FIG. 7. By rotating the clamp chassis 6 and the posture setting members 14 and 15 in opposite directions, the lock between the mechanism unit 2 and the external chassis 3 is released, and the mechanism unit 2 is elastically supported in the external chassis 3. The members 40a, 40b, and 40c are elastically levitated.
[0115]
When the attitude control member 61 is further rotated clockwise from the position shown in FIG. 18, the guide protrusion 82a provided on the lock control plate 80 is guided from the lock guide path 66d to the introduction guide path 66e. The lock control plate 80 is slightly rotated counterclockwise by the guide force at this time, the curved surface 80d of the lock control plate 80 is separated from the lock projection 75 of the swing arm 71, and the swing arm 71 is restrained. Canceled.
[0116]
At this time, the planetary gear 63 meshes with the fixed rack 64a, the large gear 62b has a large diameter, and the two second gears 56 and 57 mesh with each other, so the load on the second gear 56 side is large. . Therefore, the swing arm 71 is rotated clockwise by the reaction force of the rotational force applied to the two-stage gear 56 by the switching gear 74 rotating counterclockwise. By this rotation, the lock protrusion 75 enters the lock recess 80 a of the lock control plate 80, the switching gear 74 is separated from the two-stage gear 56, and the other switching gear 73 is connected to the large-diameter gear 55 a of the two-stage gear 55. Engage. At this time, the side surface 80c of the lock control plate 80 comes into contact with the pressing protrusion 92a of the switching arm 90.
[0117]
The power of the motor M is transmitted from the drive gear 72 to the two-stage gear 55 via the switching gear 73, and the screw shaft 52 is driven by the small gear 52a, so that the optical head H is separated from the rotary drive unit 11. Moved in the direction. At that time, the switching arm 90 becomes free. Therefore, the lock control plate 80 urged counterclockwise by the spring rotates counterclockwise, and the guide projection 82a comes out of the introduction guide path 66e as shown in FIG. The restricting piece 80b is engaged with the lock protrusion 75, the lock protrusion 75 is held in the lock recess 80a, and the swing arm 71 is held in a state of being rotated clockwise.
[0118]
Thereafter, the power of the motor M is applied to the screw shaft 52, the optical head H is moved, and a reproducing operation and a recording operation are performed.
[0119]
【The invention's effect】
According to the present invention described above, the mechanism for clamping and releasing the clamp can be made thin, and the load for releasing the clamp can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a mechanism unit of a disk device according to the present invention;
FIG. 2 is a perspective view showing a state after assembly of the mechanism unit;
FIG. 3 is an exploded perspective view showing an external chassis of the disk device of the present invention;
FIG. 4 is a perspective view showing a state after the external chassis is assembled;
FIG. 5 is a plan view showing a state after the mechanism unit and the external chassis are assembled;
FIG. 6 is a perspective view showing a standby state of the disk device;
FIG. 7 is a side view when the disk device is in a driving state;
8 is a cross-sectional view taken along line VIII-VIII in FIG. 5 when the disk device is in a driving state;
FIG. 9 is a side view when the disk device is in a transport state;
FIG. 10 shows a disk deviceTransportSectional drawing cut | disconnected by the VIII-VIII line of FIG. 5 when it is in a state,
11 is a perspective view showing the disk device from the back side of FIG. 2, showing the mechanism unit in a locked state;
12 is a perspective view showing the disk device from the back side of FIG. 2, showing the mechanism unit in a transporting state;
13 is a bottom view showing the state of FIG.
14 is a bottom view showing the state of FIG.
15 is a partially enlarged side view of FIG. 9,
FIG. 16 is a perspective view showing switching means arranged on the back side of the disk device;
FIG. 17 is a bottom view of the switching means showing the disk device from the back side, showing a state when the disk is driven;
FIG. 18 is a bottom view of the switching means showing the disk device from the back side, showing a state immediately before reaching the state at the time of disk conveyance;
FIG. 19 is a bottom view of the switching means showing the disk device from the back side, and shows a state when the disk is driven;
[Explanation of symbols]
H Optical head
1 Disk unit
2 Mechanism unit
3 External chassis
4 Lower chassis
4c axis
4e Shaft protrusion
5 Upper chassis
6 Clamp chassis
7 Lower base
8 Upper base
4a Screw shaft
4b small gear
9a, 9b, 9c, 9d, 9e, 9f, 9g
9h Fixed piece (fixed part)
10 Power transmission member
11 Rotation drive
14, 15 Posture setting member
14a, 14, 15a, 15b Contact piece
16 Guide hole
17a, 17b Movable arm
18 Laura
20 connecting members
21 Guide protrusion
28 axes
29 Shaft
30,31 Arm part
33 Guide slot
35 Clamp arm
35a Contact part
35b Rotating fulcrum
36 Clamper
40a, 40b, 40c Elastic support member
50a Drive gear

Claims (4)

In the disk device in which a mechanism unit is provided inside the external chassis, and in this mechanism unit, a rotation drive unit that drives the disk, and a clamp unit that clamps the disk to the rotation drive unit,
It said clamping means comprises a clamp chassis, with respect to the clamp chassis is supported rotatably via a pivot point to form a plane parallel to the pivot axis of the disc loaded in the mechanism unit Clamp arm,
The clamp chassis is rotatably supported by an axis parallel to the rotation center line with respect to the mechanism unit, and the rotation fulcrum of the clamp chassis is driven to rotate more than the rotation fulcrum portion of the clamp arm. It is provided at a position close to the club side,
The clamp arm is provided with a clamper rotatably at a tip portion that is on the rotation drive portion side with the rotation fulcrum portion interposed therebetween, and a contact portion is provided at a base portion on the other side, and the clamp arm The tip is biased by a biasing member toward the rotation drive unit ,
By the previous SL abutment for the clamp chassis rotates in the direction hits the fixed portion located above the clamp chassis, the clamp arm is rotated the clamper in a direction away from the rotary drive unit,
When the previous SL abutment for the clamp chassis rotates in a direction Ru away from the fixed part, said clamper contact receiving biasing force of the biasing member relative to the disk on the rotary drive unit A disk device characterized. Than the distance to the rotational center of the clamper from the pivot part of the clamp arm, a short claim 1 Symbol mounting of the disk device toward the distance from the pivot point portion to the contact portion. The abutting portion of the clamp arm, disk drive according to claim 1 or 2, wherein are raised formed toward the fixed part. The fixing portion, the disk apparatus according to any one of the claims 1 a ceiling portion inner surface of the outer chassis 3.

Images