JP2009070493A - Disk drive device and disk recording and/or reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate impact sound caused by the contact of a follower of a slide member against a wall of a cam groove of a disk tray and the occurrence of chattering noise when a tooth of a drive gear abuts against a tooth of a tray-side gear part or a loading-side gear part when switching an operation by a gear mechanism. <P>SOLUTION: The disk drive device includes: a disk tray 5; a turntable rotating the disk; a tray conveyance mechanism conveying a disk tray; a unit lift mechanism moving the turntable between a loading position and a retreating position; one driving motor; a first power transmission part including a first normally-meshed drive gear 106 transmitting the power of the driving motor to a main rack of the tray conveyance mechanism; a second power transmission part including a second normally-meshed drive gear 108 transmitting the power of the driving motor to a rack part 72 of a loading part moving mechanism; and a power transmission mechanism 12 including a transmission path switching part switching a power transmission path from the driving motor between the first power transmission part and the second power transmission part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a tray transport mechanism for transporting a disk tray on which a disk-shaped recording medium mounted on a disk mounting portion is placed between a mounting position and an ejection position, and a disk mounting portion between a mounting position and a retracted position. The present invention relates to a disk drive device in which a mounting unit moving mechanism moved in between is operated by a single drive motor, and a disk recording and / or reproducing device including the disk drive device.

  As a conventional disk drive device of this type, for example, there is one described in Patent Document 1. Patent Document 1 describes a disk drive device using an optical disk and a head feeding mechanism thereof. The disk drive device according to Patent Document 1 describes: “a disk tray that transports an optical disk for recording and / or reproducing information signals to a disk mounting portion; and the optical disk that is placed on the disk tray and transported A base chassis that rotatably supports a turntable that is detachably mounted, and an optical head that faces the optical disk mounted on the turntable from an opening provided in the base chassis to transmit information signals. A disk drive device comprising: an optical pickup device that performs writing and / or reading; and a pickup feeding mechanism that has a feed shaft that moves the optical pickup device so as to approach and separate from the turntable. The bearing part is provided integrally with the base chassis. There.

  According to the disk drive device (referred to as the first conventional example) according to Patent Document 1 having such a configuration, “the bearing portion of the feed shaft is provided integrally with the base chassis, so that the bearing member is required as a separate member. The number of parts can be reduced and a high-precision feed mechanism can be realized by increasing the mounting accuracy of the feed shaft ”(paragraph [0019] of the specification). The

  Further, as another example of the conventional disk drive device, for example, there is a device described in Patent Document 2. Patent Document 2 describes a disk drive device and a disk tray in which a disk-shaped recording medium is rotatably mounted on an internal turntable when the disk tray is pulled into the apparatus main body. The disk drive device according to Patent Document 2 is “a device main body, a disk tray provided in the device main body and provided with a storage recess for storing a disk-shaped recording medium, and the disk tray on the front of the device main body. A transport mechanism for transporting the inside and outside of the apparatus main body from an opening provided in the disk, a disk rotation driving mechanism for holding and rotating the disk-shaped recording medium conveyed in the apparatus main body, and the rotational drive. And a recording / reproducing mechanism for recording and / or reproducing information signals with respect to the disc-shaped recording medium, and the disc tray is provided with a cushioning material on the peripheral surface of the housing recess ”.

According to the disk drive device (referred to as the second conventional example) according to Patent Document 2 having such a configuration, “even if the optical disk is cracked due to a load accompanying high-speed rotation due to cracks or scratches on the optical disk. Since the cushioning material is provided on the peripheral surface of the storage recess formed in the disc tray, the impact due to the collision with the peripheral surface is weakened by this cushioning material ”(paragraph [0014] in the specification). Is done.
JP 2000-195196 A JP 2006-85778 A

  However, in any of the first conventional example and the second conventional example described above, the disk tray on which the disk-shaped recording medium is placed is transported between the mounting position of the disk mounting portion and the external take-out position. A tray transport mechanism for moving the disk mounting portion and a mounting portion moving mechanism for moving the disk mounting portion between the mounting position and the retracted position via a gear mechanism so that power can be transmitted to one drive motor. Both mechanisms are selectively operated by switching the power transmission path. Therefore, the gear mechanism has a path switching mechanism for switching the power transmission path, and moves one drive gear to the tray side gear part of the tray transport mechanism and the mounting part side gear part of the mounting part moving mechanism. It was designed to selectively mesh.

  The initial operation of selectively engaging the drive gear with the tray side gear portion and the mounting portion side gear portion is started by a follower provided on the slide member and a cam groove provided on the lower surface of the disc tray. As a result, when switching the operation by the gear mechanism, the impact sound caused by the contact of the follower of the slide member with the wall of the cam groove of the disc tray and the teeth of the drive gear become the teeth of the tray side gear part or the mounting part side gear part. There is a problem that a tooth contact sound is generated at the time of collision, and a noise “gacha” is generated.

  The problem to be solved is that when switching the operation by the gear mechanism, the impact sound caused by the contact of the follower of the slide member to the wall of the cam groove of the disc tray and the teeth of the drive gear are the tray side gear part or the mounting part side gear. The tooth contact sound is generated when it collides with the teeth of the part, and the noise “gacha” is generated.

  The present invention has been made in view of such conventional problems, and a disc tray on which a disc-shaped recording medium for recording and / or reproducing information signals is placed, and a disc-shaped recording medium are attached and detached. A disc tray between a disc mounting portion that can be mounted and rotates the disc-shaped recording medium, and a mounting position where the disc-shaped recording medium is mounted on the disc mounting portion and a take-out position where the disc-shaped recording medium can be taken out A tray transport mechanism for transporting the disc, a mounting portion moving mechanism for moving the disc mounting portion between the mounting position and a retracted position away from the mounting position, one drive motor, and the power of the drive motor for tray transport A first power transmission unit having a first drive gear that is always meshed with the tray side gear unit that transmits to the tray side gear unit of the mechanism; A second power transmission unit having a second drive gear that is always meshed with the mounting unit side gear unit that transmits to the mounting unit side gear unit of the moving mechanism, and a power transmission path from the drive motor to the first power transmission And a power transmission mechanism having a transmission path switching unit for switching between the first power transmission unit and the second power transmission unit.

  In the disk drive device and the disk recording and / or reproducing device of the present invention, when the operation of the tray transport mechanism and the mounting portion moving mechanism by the gear mechanism is switched, the impact sound and the impact sound generated when the follower of the slide member contacts the cam groove of the disk tray , A disk drive device and a disk recording device that do not generate a tooth contact sound when the teeth of the drive gear collide with the teeth of the tray side gear part or the mounting part side gear part, and do not generate a large noise at the time of switching; A playback device can be provided.

  The first power transmission unit, the second power transmission unit, and the transmission path switching unit are used to prevent generation of loud noise when the operation of the tray transport mechanism and the mounting unit moving mechanism is switched by the gear mechanism. It was realized with a simple configuration by driving the power transmission mechanism with a single drive motor.

  Embodiments of a disk drive device to which the present invention is applied and a disk recording and / or playback device including the disk drive device will be described below with reference to the accompanying drawings. The disk drive device according to this embodiment uses an optical disk such as a DVD or CD-ROM having a diameter of 12 cm and a diameter of 8 cm as a disk-shaped recording medium, and the optical disk is conveyed by a disk tray and automatically loaded. The present invention is applied to a disk tray type disk drive device that reproduces (reads) and records (writes) information recorded on the optical disk.

  1 and FIG. 2 are perspective views showing an embodiment of a disk drive device of the present invention, FIGS. 3 to 8 are views with a housing removed, FIG. 3 is a perspective view, and FIG. 4 is a plan view. 5 is a side view, FIG. 6 is a perspective view in which a disc tray is projected, FIG. 7 is a plan view, and FIG. 8 is a side view. 9 is a perspective view of a main frame, FIG. 10 is a perspective view of a drive unit, FIG. 11 is a perspective view of a disk tray, FIG. 12 is a perspective view of a shutter opening / closing member, FIG. 13 is a shutter gear, and FIGS. FIG. 14 is an exploded perspective view of the left slide member, FIG. 15 is an assembled perspective view, FIG. 16 is an exploded perspective view of the right slide member, and FIG. 17 is an assembled perspective view. 18 is a plan view of the power transmission system, FIGS. 19 and 20 are also perspective views, FIG. 21 is an exploded perspective view, FIG. 22 is a partially exploded perspective view, FIG. 23 is an assembled perspective view, FIG. Is a front view, and FIG. 26 is a cross-sectional view. 27 to 29 are diagrams for explaining the operation of the disk mounting portion and the clamper during chucking, and FIGS. 30 and 31 are diagrams for explaining the stopper.

  As shown in FIGS. 1 to 8, the disk drive device 1 includes a hollow, flat housing 2 that forms a rectangular parallelepiped, a main frame 3 that is housed in the housing 2, and a housing that is housed in the main frame 3. The drive unit 4 and a disc tray 5 supported so as to be movable back and forth with respect to the main frame 3 are provided. As shown in FIGS. 1 and 2, the housing 2 is composed of a top panel 6 opened on the front surface and the lower surface, a lower panel opened on the front surface and the upper surface, which does not appear in the drawings, and a front panel 7. . The top panel 6 and the lower panel have a shape that can be superposed vertically, and a case main body having an open front is configured by superposing the top panel 6 and the lower panel. The top panel 6 and the lower panel are detachably fastened and fixed by a fixing screw (not shown).

  An opening on the front surface of the case body constituted by the top panel 6 and the lower panel is closed by the front panel 7. The front panel 7 is configured to be detachable from the case body. That is, as shown in FIG. 3, the front panel 7 is provided with a rectangular front portion 7a having a size that can cover the entire front opening of the case body, and the front portion 7a. And a plurality of engaging pieces 7b having elasticity. The plurality of engaging pieces 7b are for attaching the front panel 7 to the case body. In this embodiment, one or two engaging pieces 7b are arranged on the peripheral edge of the front surface portion 7a, for a total of five engaging pieces 7b. Is provided.

  The front panel 7a of the front panel 7 is provided with a tray inlet / outlet 8 through which the disc tray 5 is inserted and removed, and a plurality of operation buttons 9a, 9b, 9c. The tray inlet / outlet 8 is provided to extend in the longitudinal direction (left / right direction) at a position biased to the upper side in the width direction (up / down direction) of the front surface portion 7a. At the position deviated downward in the width direction of the front surface portion 7a, the first operation button 9a and the second operation button 9b are arranged on one side in the longitudinal direction, and the third operation button 9c on the other side in the longitudinal direction. Is arranged. For example, the first operation button 9a can be a power button, the second operation button 9b can be a record / playback button, the third operation button 9c can be an eject button, or the like. However, as a matter of course, the operation buttons are not limited to these buttons.

  As shown in FIG. 9, the main frame 3 includes a frame portion 3a formed of a rectangular frame, and left and right side portions 3b and 3c arranged with a predetermined gap on both outer sides in the width direction of the frame portion 3a. have. A drive unit 4 is disposed at the center of the main frame 3, and the drive unit 4 is supported so that the front side can be moved up and down in the vertical direction with the rear end portion as a rotation fulcrum. In addition, a power system storage portion 11 is provided at the front end portion of the frame portion 3a. A power transmission mechanism 12 is stored in the power system storage unit 11. A left slide member 13 is disposed outside the left side surface portion 3b, and a right slide member 14 is disposed outside the right side surface portion 3c.

  The drive unit 4 has a configuration as shown in FIG. That is, the drive unit 4 is fixed to the base chassis 16 supported so as to be able to change the posture (swing) with respect to the main frame 3, the spindle motor 17 fixed to the base chassis 16, and the rotation shaft of the spindle motor 17. A turntable 18 showing a specific example of the disc mounting portion to be used, and an optical pickup device 20 for recording (writing) and / or reproducing (reading) information signals on the optical disc mounted on the turntable 18 The optical pickup device 20 includes a pickup moving mechanism 21 that moves the optical pickup device 20 so as to approach and separate from the turntable 18, a pickup chassis 22 that supports the pickup moving mechanism 21, and the like.

  The base chassis 16 is made of a frame-shaped plate material having a substantially rectangular shape having a size that enters the frame of the frame portion 3 a of the main frame 3. On the four sides of the base chassis 16, bent portions 16 a that play a role of reinforcement are provided so as to protrude in the same plane direction. Further, two support pieces 16b and 16b are provided on the rear bent portion 16a of the base chassis 16 so as to protrude rearward. Each support piece 16b is provided with a notch hole that opens to the side, and a first insulator 23 made of rubber is mounted in each notch hole. By fixing the fixing screws 24 through the first insulators 23 and screwing and fixing the tip portions of the fixing screws 24 to the frame portion 3a, the two rear end portions of the base chassis 16 can be tilted to the main frame 3. It is supported by.

  A spindle motor 17 is fixed to a substantially central portion of the front side piece of the base chassis 16. The spindle motor 17 is attached so that the axis of the rotation shaft is substantially perpendicular to the main surface of the base chassis 16. A turntable 18 is integrally provided on an upper portion of the rotation shaft of the spindle motor 17. The turntable 18 has a fitting portion 18a formed of a circular protrusion that is fitted in the center hole of the optical disk, and a ring-shaped placement portion 18b on which the peripheral edge of the center hole is placed. An optical pickup device 20 is disposed inside the spindle motor 17 of the base chassis 16.

  The optical pickup device 20 includes an objective lens 26 that faces an information recording surface of an optical disk mounted on a turntable 18 that is a disk mounting portion, and a focus direction of the objective lens 26 (a direction perpendicular to the information recording surface). And a biaxial actuator 27 that can be moved in a tracking direction (a direction parallel to the information recording surface), a slider 28 on which the biaxial actuator 27 is mounted, an optical element mounted on the slider 28, and the like. ing. As the driving force of the biaxial actuator 27, an electromagnetic force is exclusively used, and in this embodiment, a leaf spring type biaxial actuator classified as a difference in the support method of the movable part is adopted. However, as a matter of course, other types of wire support method, hinge method, shaft sliding method, and the like can be applied as the biaxial actuator.

  The optical element of the optical pickup device 20 includes, for example, a light emitting diode that generates recording / reproducing laser light and a photodiode that receives the returning laser light reflected from the information recording surface. The slider 28 is arranged so as to cross the frame portion 3a of the main frame 3, and is slidably supported by two guide shafts 29a and 29b arranged in parallel at a predetermined interval. The two guide shafts 29 a and 29 b are extended in the longitudinal direction of the base chassis 16 so as to sandwich the spindle motor 17. The guide shafts 29a and 29b are supported by the pickup chassis 22 at both ends in the axial direction.

  On the outside of one guide shaft 29a, a feed screw shaft 31 is arranged in parallel at a predetermined interval. The feed screw shaft 31 is a rotating shaft of the feed motor 32. The feed motor 32 is fixed to the rear end of the pickup chassis 22 with the feed screw shaft 31 oriented in a direction parallel to the surface direction of the base chassis 16. The end of the feed screw shaft 31 opposite to the feed motor 32 is rotatably supported by the front end of the pickup chassis 22. A nut member (not shown) attached to the slider 28 is engaged with the thread groove of the feed screw shaft 31. The rotational force of the feed screw shaft 31 is transmitted to the slider 28 through this nut member, so that it is guided by the two guide shafts 29a and 29b and according to the rotational direction of the feed screw shaft 31. However, it can be moved by a predetermined distance in a direction approaching the spindle motor 17 and a direction away from the spindle motor 17.

  The pickup chassis 22 is elastically supported by the base chassis 16 at three positions via a rubber second insulator 33. Of the three insulators 33, two insulators 33 are disposed on the front side of the pickup chassis 22, and one insulator 33 is disposed on the rear side of the pickup chassis 22. The pick-up chassis 22 is elastically supported by the base chassis 16 by passing the fixing screws 34 through the second insulators 33 and screwing the tip portions of the fixing screws 34 to the base chassis 16.

  The posture (inclination angle) of the pickup chassis 22 can be adjusted by adjusting the tightening force of the support portion using the three second insulators 33. Thereby, the inclination angle of the objective lens 26 with respect to the information recording surface of the optical disc, that is, the so-called skew angle can be adjusted. The two guide shafts 29a and 29b, the feed screw shaft 31, the feed motor 32, and the nut member constitute a pickup moving mechanism that moves the optical pickup device 20 toward and away from the turntable 18.

  The drive unit 4 having such a configuration is inserted into the frame portion 3a of the main frame 3. At this time, a pair of insulators 23, 23 arranged at the rear end of the drive unit 4 are mounted on the pair of support portions 3 d, 3 d of the frame portion 3 a, and the drive unit 4 is fixed by a fixing screw 24 inserted through these insulators 23. However, it is supported so that it can be moved up and down in the front side. A rotation bracket 35 is attached to the front portion of the drive unit 4 for rotating (up and down) the drive unit 4 in the vertical direction around the pair of insulators 23 and 23 at the rear end.

  As shown in FIGS. 27 to 29, the rotating bracket 35 is arranged on the outer sides of the base chassis 16 on the left and right side portions 35 a, 35 a, and on the lower side of the base chassis 16 and on the left and right side portions. 35a and a connecting portion 35b for connecting 35a. A convex shaft 36 serving as the center of the rotation operation is provided at the rear portion of each side surface portion 35a so as to protrude laterally from the outer surface. Further, a cam pin 37 forming a part of a tray lifting mechanism for causing a rotation operation is provided at the front portion of each side surface portion 35a so as to protrude from the outer surface to the side. The left and right convex shafts 36, 36 of the rotation bracket 35 are rotatably supported by bearings 38 provided in the middle in the longitudinal direction of the inner edge of the frame portion 3 a of the main frame 3.

  As shown in FIG. 11, the disc tray 5 is made of a plate-like member having a substantially rectangular shape having a size corresponding to the upper surface opening of the main frame 3. The disc tray 5 is provided with a disc storage portion 41 on one side in the longitudinal direction, and an opening 42 extending in the longitudinal direction from the central portion of the disc storage portion 41 to the vicinity of the other end is provided. Yes. A main rack 40 extending from one end in the longitudinal direction to the vicinity of the other end is provided on one side in the width direction of the bottom surface of the disc tray 5 as shown in FIG. The main rack 40 serves as a driving force transmission unit for moving the disk tray 5 back and forth within a predetermined distance.

  The disk storage unit 41 has a large-diameter storage unit 41a that can store an optical disk with a diameter of 12 cm, and a small-diameter storage unit that is continuous inside the large-diameter storage unit 41a and can store an optical disk with a diameter of 8 cm. 41b. On the opposite side of the disc tray 5 from the disc storage portion 41, a reinforcing bridging portion 5a is provided. A motor escape hole 43a having a semicircular shape for avoiding interference with the spindle motor 17 of the drive unit 4 is provided at the center of the disk storage portion 41. The motor escape hole 43a is continuous with one end of the rectangular opening 42. A tray shutter 44 is slidably attached to the opening 42.

  The tray shutter 44 has a shape commensurate with the shape of the portion corresponding to the opening 42 in the disk storage portion 41. The tray shutter 44 is for closing the notch portion of the disc storage portion 41 when the disc tray 5 is pulled out (when the disc is taken out). When the disc tray 5 is stored in the housing 2, the disc tray 5 moves in a direction away from the disc storage portion 41. Therefore, the tray shutter 44 is movable in the longitudinal direction with respect to the disc tray 5.

  In order to realize this, rail portions 44 a and 44 b formed in an L shape are provided on both sides of the tray shutter 44 in the width direction. One rail portion 44a is provided with a rack portion 45 disposed along the edge thereof. Rail receiving grooves 46 into which the left and right rail portions 44 a and 44 b of the tray shutter 44 are slidably inserted are provided at inner edges on both sides of the opening 42 of the disc tray 5. Furthermore, a semi-circular motor escape hole 43 b is formed at the edge of the tray shutter 44 on the disk storage portion 41 side to avoid interference with the spindle motor 17. By completely inserting the tray shutter 44 into the cutout portion of the disk storage portion 41, the two motor escape holes 43a and 43b are combined with each other to form one circular motor escape hole.

  The disc tray 5 is provided with a shutter moving mechanism 51 for moving the tray shutter 44 forward and backward. The shutter moving mechanism 51 includes an opening / closing slider 52, a transmission gear 53, and a return spring 54. As shown in FIG. 12, the open / close slider 52 is made of a rectangular plate-like member, and is provided with a narrow portion 52a by providing a step on one side in the longitudinal direction. The open / close slider 52 has two guide long holes 55 and 55 for securing a linear motion in the direction in which the tray shutter 44 moves, and a storage hole 56 including a long hole for storing the return spring 54. Is provided. Further, a rack portion 57 disposed along the edge is provided on one side of the narrow width portion 52a.

  As shown in FIG. 13, the transmission gear 53 is opposite to the large-diameter gear 53a, the cylindrical shaft portion 53b formed continuously on one surface of the large-diameter gear 53a, and the large-diameter gear 53a of the cylindrical shaft portion 53b. And a small-diameter gear 53c formed continuously on the side surface. And the hole 53d which penetrates these center parts is provided in the transmission gearwheel 53. FIG. In order to attach the transmission gear 53, the disc tray 5 is provided with a recess 58 as shown in FIG. A support shaft 58a is erected at the center of the recess 58, and the transmission gear 53 is rotatably supported by inserting a hole 53d into the support shaft 58a. At this time, a part of the large-diameter gear 53 a of the transmission gear 53 enters the rail receiving groove 46 of the disc tray 5.

  Two guide protrusions 59a and 59b for slidably supporting the open / close slider 52 are provided in the vicinity of the recess 58 of the disk tray 5. The two guide protrusions 59 a and 59 b are arranged at positions corresponding to the two guide elongated holes 55 and 55 of the open / close slider 52. And the head part protruded to the side is provided in the top part of each guide protrusion 59a, 59b in order to prevent that each guide slot 55,55 slips out. Further, the disk tray 5 is provided with a spring receiving projection 59c for locking one end of the return spring 54. The other end of the return spring 54 whose one end is locked to the spring receiving projection 59 c extends to the disk storage portion 41 side and is locked to the front portion of the open / close slider 52.

  In this embodiment, the return spring 54 uses a compression coil spring, and is usually in a compressed state. Therefore, when the return spring 54 is in the free state, the open / close slider 52 is located away from the disk storage portion 41. At this time, the rack portion 57 of the open / close slider 52 is meshed with the small-diameter gear 53 c of the transmission gear 53 housed in the recess 58. The rack portion 45 of the tray shutter 44 is engaged with the large-diameter gear 53 a of the transmission gear 53, and the tray shutter 44 is in a state of entering into the notch of the disk storage portion 41.

  The disc tray 5 having such a configuration and having the tray shutter 44 and the shutter moving mechanism 51 mounted thereon is attached to the main frame 3 so as to be movable in the longitudinal direction, which is the longitudinal direction. Therefore, as shown in FIG. 9, left and right rail protrusions 61 and 61 for guiding the disk tray 5 are provided on the inner surfaces of the left and right side surfaces 3 b and 3 c of the main frame 3. The left and right rail clamping portions 62 and 62 are provided on both sides of the disc tray 5 in order to support the rail protrusions 61 and 61 with the rail projections 61 and 61 therebetween. Each rail clamping portion 62 includes two L-shaped hook portions 62 a that face the upper surface of the rail protrusion 61, and a hook-shaped protruding portion 62 b that faces the lower surface of the rail protrusion 61. Guided by the left and right rail protrusions 61, 61, the disc tray 5 is moved in the front-rear direction.

  The left slide member 13 disposed on the left side of the main frame 3 has a configuration as shown in FIGS. That is, the left slide member 13 includes a slide plate 63 and a cam plate 64 configured integrally with the slide plate 63. The slide plate 63 is made of a long plate-like member having an appropriate width, and is provided with a narrow portion 63a by providing a step on one side (rear side) in the longitudinal direction. The slide plate 63 includes two guide slots 65 and 65 for securing a linear motion in the direction in which the disc tray 5 moves, a cam groove 66 for clamping, and the left and right slide members 13 and 14. A rack portion 67 is provided for synchronizing the operation during sliding.

  The two long guide holes 65 are set to a predetermined length with a predetermined interval in the longitudinal direction of the slide plate 63, and the slide plate 63 is attached to the main frame 3 within the range of the long hole 65. On the other hand, it is relatively movable in the front-rear direction. The cam groove 66 forms a part of a clamper raising / lowering mechanism for rotating (elevating and lowering) a clamper described later in the vertical direction. The cam groove 66 includes a front horizontal portion 66a and a rear horizontal portion 66c that extend in the front-rear direction, and an inclined portion 66b that connects the front horizontal portion 66a and the rear horizontal portion 66c obliquely. The inclined portion 66b is set on the rear end side, and the rear horizontal portion 66c is formed sufficiently smaller than the front horizontal portion 66a.

  A rack portion 67 is provided below the narrow portion 63 a of the slide plate 63. As shown in FIGS. 19 and 20, the rack portion 67 meshes with a synchronizing pinion. Further, the slide plate 63 is provided with two fitting holes 68 and 68 for attaching the cam plate 64 and two positioning holes 69a and 69b for positioning the cam plate 64. The two fitting holes 68, 68 are arranged below the guide slot 65 of the slide plate 63 with an interval approximately equal to the length of the guide slot 65. Positioning holes 69a and 69b are arranged.

  The cam plate 64 is made of a plate-like member having a substantially rectangular shape that is slightly larger than the length of the guide slot 65, and a narrow portion 64a is provided by providing a step on one side (front side) in the longitudinal direction. . An elevation cam groove 71 and a rack portion 72 are provided on one surface of the cam plate 64, and a connecting overhang portion 73 and a sliding protrusion 74 are provided on the other surface on the opposite side. On one side of the cam plate 64 in the width direction, a V-shaped notch 76 for allowing the stopper 75 to rotate and a hook guide 77 formed in an L shape are provided. It has been.

  The rack portion 72 is set to a predetermined length from the front end of the narrow width portion 64a, which is the front side of the cam plate 64, to the middle portion in the rear. The elevating cam groove 71 is for elevating and lowering the drive unit 4 (operation for rotating the front side up and down around the support portion 3d at the rear end). The elevating cam groove 71 includes a lower horizontal portion 71a set at the front side, an upper horizontal portion 71c set at a predetermined height behind the lower horizontal portion 71a and at a predetermined height, and a lower horizontal portion 71c. There is an inclined portion 71b that obliquely connects the horizontal portion 71a and the upper horizontal portion 71c. The lower horizontal portion 71a of the elevating cam groove 71 is a portion that causes the drive unit 4 to be inclined at the maximum angle. The upper horizontal portion 71c is a portion that maintains the drive unit 4 in a substantially horizontal state. The cam pin 37 of the rotating bracket 35 is slidably engaged with the lift cam groove 71.

  A notch 76 is disposed above the lower horizontal portion 71 a of the cam groove 71 for raising and lowering the cam plate 64. A communication groove 78 for introducing the cam pin 37 into the elevating cam groove 71 is provided at a substantially central portion of the notch 76. The hook guide 77 guides the disc tray 5 and prevents it from falling off the main frame 3. The tip of the hook guide 77 protrudes inward, and this tip is engaged with a guide groove (portion shown by extracting the main part) 79 provided on the side surface of the disc tray 5 that does not appear in FIG. . In front of the guide groove 79 on the side surface of the disc tray 5, there is provided a stopper receiving portion 80 formed of a triangular recess to which the stopper 75 is detachably engaged.

  As shown in FIG. 14, the stopper 75 includes a stopper body having a shape obtained by combining two triangular blocks, and a rotating shaft portion 75 a provided integrally with the block body. The two blocks are integrally formed such that one corner adjacent to the apex is overlapped with each other and one apex is overlapped with the other base, and the rotation shaft portion is formed on the overlapped corner. 75a is provided. Thus, the stopper 75 is provided with two projecting corner portions 75b and 75c that project to a position rotationally displaced by a predetermined angle about the rotation shaft portion 75a.

  The overhanging portion 73 of the cam plate 64 is provided to set a predetermined gap between the cam plate 64 and the slide plate 63. Two fitting recesses 81, 81 are provided on the outer end face of the overhanging portion 73 at intervals corresponding to the two fitting holes 68, 68 of the slide plate 63. Two positioning convex portions 82 and 82 are provided inside the two fitting concave portions 81 and 81 with an interval corresponding to the two positioning holes 69a and 69b. The sliding protrusion 74 is provided to reduce the frictional resistance when the cam plate 64 slides.

  The slide plate 63 and the cam plate 64 are overlaid through the overhanging portion 73, and are fastened and fixed by a fixing screw that penetrates the hole of the fitting recess 81 and the fitting hole 68, and is assembled as shown in FIG. When the left sliver member 13 is assembled, the slide plate 63 is disposed outside the left side surface portion 3b of the main frame 3, and the cam plate 64 is disposed inside the left side surface portion 3b. The left sliver member 13 is movable in the front-rear direction and held by the main frame 3 with the left side surface portion 3b sandwiched between the slide plate 63 and the cam plate 64.

  The right slide member 14 is configured by a slide plate 83 and a cam plate 84 configured integrally with the slide plate 83. The slide plate 83 has a symmetrical shape with the slide plate 63 and has a narrow width portion by providing a step on one side (rear side) in the longitudinal direction of a long plate-like member having an appropriate width. 83a is provided. The slide plate 83 is provided with two guide slots 65 and 65 for securing a linear motion in the moving direction of the disc tray 5, a clamp cam groove 66, and the left and right slide members 13 and 14. A rack portion 67 is provided for synchronizing the operation during sliding.

  The two long guide holes 65 are set to a predetermined length with a predetermined interval in the longitudinal direction of the slide plate 83, and the slide plate 83 is attached to the main frame 3 within the range of the long hole 65. On the other hand, it is relatively movable in the front-rear direction. The cam groove 66 forms a part of a clamper raising / lowering mechanism for rotating (elevating and lowering) a clamper described later in the vertical direction. The cam groove 66 includes a front horizontal portion 66a and a rear horizontal portion 66c that extend in the front-rear direction, and an inclined portion 66b that connects the front horizontal portion 66a and the rear horizontal portion 66c obliquely. The inclined portion 66b is set on the rear end side, and the rear horizontal portion 66c is formed sufficiently smaller than the front horizontal portion 66a.

  A rack portion 67 is provided below the narrow width portion 83 a of the slide plate 83. As shown in FIGS. 19 and 20, the rack portion 67 meshes with a synchronizing pinion. Further, the slide plate 83 is provided with two fitting holes 68 and 68 for attaching the cam plate 84 and two positioning holes 69a and 69b for positioning the cam plate 84. The two fitting holes 68 and 68 are arranged below the guide slot 65 of the slide plate 83 with an interval similar to the length of the guide slot 65, Positioning holes 69a and 69b are arranged.

  The cam plate 84 is made of a plate-like member having a substantially rectangular shape that is slightly larger than the length of the guide slot 65, and a narrow portion 84a is provided by providing a step on one side (front side) in the longitudinal direction. . An elevation cam groove 71 is provided on one surface of the cam plate 84, and an overhanging portion 73 for connection is provided on the other surface on the opposite side. The raising / lowering cam groove 71 is bilaterally symmetric with that provided on the cam plate 64 and moves the drive unit 4 up and down.

  The elevating cam groove 71 includes a lower horizontal portion 71a set at the front side, an upper horizontal portion 71c set at a predetermined height behind the lower horizontal portion 71a and at a predetermined height, and a lower horizontal portion 71c. There is an inclined portion 71b that obliquely connects the horizontal portion 71a and the upper horizontal portion 71c. The lower horizontal portion 71a of the elevating cam groove 71 is a portion that tilts the drive unit 4 by the maximum angle, and the upper horizontal portion 71c is a portion that maintains the drive unit 4 in a substantially horizontal state. Similarly, the cam pin 37 of the rotating bracket 35 is slidably engaged with the lift cam groove 71.

  The overhanging portion 73 of the cam plate 84 is provided to set a predetermined gap between the cam plate 84 and the slide plate 83. Two fitting recesses 81, 81 are provided on the outer end face of the overhanging portion 73 at intervals corresponding to the two fitting holes 68, 68 of the slide plate 83. Two positioning convex portions 82 and 82 are provided inside the two fitting concave portions 81 and 81 with an interval corresponding to the two positioning holes 69a and 69b.

  The slide plate 83 and the cam plate 84 are overlapped via the overhang portion 73 and assembled by a fixing screw penetrating the hole of the fitting recess 81 and the fitting hole 68 as shown in FIG. When the right sliver member 14 is assembled, the slide plate 83 is disposed outside the right side surface portion 3c of the main frame 3, and the cam plate 84 is disposed inside the right side surface portion 3c. Then, the right sliver member 14 is moved in the front-rear direction with the right side surface portion 3 c sandwiched between the slide plate 83 and the cam plate 84.

  FIGS. 19 and 20 show a state in which the left and right slide members 13 and 14 are connected by two gears 85 and 86 so as to be able to transmit power and can be operated synchronously. A gear 85 is meshed with the rack portion 67 of the slide plate 63 of the left slide member 13, and a gear 86 is meshed with the rack portion 67 of the slide plate 83 of the right slide member 14. The two gears 85 and 86 are fixed to both ends of a connecting shaft 87 provided so as to cross the bottom of the main frame 3. The connecting shaft 87 is rotatably supported by the main frame 3.

  Further, in order to ensure a smooth sliding operation of the left and right slide members 13, 14, two guide shaft portions 88, 88 and two hook portions 89, 89 are provided on the left and right side surfaces 3 b, 3 c of the main frame 3. Is provided. The two guide shaft portions 88 and 88 are provided at predetermined intervals in the front-rear direction on the side surface portions 3b and 3c. The guide shaft portions 88 and 88 are slidably engaged with guide elongated holes 65 and 65 provided in the slide plates 63 and 83, respectively. The two hook portions 89 and 89 are disposed above the two guide shaft portions 88 and 88 of the left and right side surface portions 3b and 3c with a predetermined interval in the front-rear direction. Each hook part 89 is formed in an L shape, and prevents bending deformation of the slide plates 63 and 83 to the side at the claw-like tip. Reference numeral 115 shown in FIGS. 3 and 5 is a position detection switch for detecting the position of the disk tray 5.

  The power transmission mechanism 12 for reciprocating the disc tray 5 and the left and right slide members 13 and 14 is housed in a power system housing section 11 provided at the front portion of the main frame 3 as shown in FIGS. Yes. The power transmission mechanism 12 has a configuration as shown in FIGS. That is, the power transmission mechanism 12 includes a drive motor 90 that is a power generation source, a planetary gear mechanism 91 that is connected to the drive motor 90 so as to be able to transmit power, and a gear that is connected to the planetary gear mechanism 91 so as to be able to transmit power. The driving mechanism 92 is configured.

  As the drive motor 90, for example, a stepping motor can be applied. However, as a drive motor 90, it is needless to say that other types of induction motors and DC motors can be used. A drive pulley 93 having a V-shaped groove is fixed to the rotation shaft of the drive motor 90. One end of a rubber square belt 94 showing a specific example of the power transmission member is hooked to the drive pulley 93. The other end of the square belt 94 is hooked on a driven pulley 95 having a V-shaped groove.

  The planetary gear mechanism 91 includes a sun gear 96 that is integrally formed with the driven pulley 95, a carrier 97 that rotates outside the sun gear 96, a plurality of planetary gears 98 that are rotatably supported by the carrier 97, and a plurality of planetary gears 98. And an internal gear 99 meshed with the other planetary gear 98. A cylindrical shaft portion 95a protruding in a direction perpendicular to the plane is provided at the center of one surface of the driven pulley 95, and a sun gear 96 is integrally provided at the tip of the cylindrical shaft portion 95a. The driven pulley 95, the cylindrical shaft portion 95a, and the sun gear 96 are arranged concentrically, the cylindrical shaft portion 95a is formed with a smaller diameter than the driven pulley 95, and the sun gear 96 is formed with a smaller diameter than the cylindrical shaft portion 95a. Has been. A through hole is passed through the center of the driven pulley 95, the cylindrical shaft portion 95 a, and the sun gear 96.

  The carrier 97 of the planetary gear mechanism 91 is formed as a disk-shaped member having a center hole through which the cylindrical shaft portion 95a passes. On one surface of the carrier 97, a carrier gear 101 showing a specific example of the output gear formed concentrically with the center hole is provided. On the other surface of the carrier 97, a plurality of (two in this embodiment) pivots 102 for rotatably supporting the planetary gear 98 are provided. A plurality of planetary gears 98 supported by these pivots 102 are simultaneously meshed with the internal gear 99. On the opposite surface of the internal gear 99, an outer peripheral gear 103, which is another specific example of the output gear having the same rotation center, is integrally provided. The planetary gear mechanism 91 having such a configuration is rotatably supported by a first rotating shaft 104 that is erected in the power system housing unit 11.

  The gear drive mechanism 92 of the power transmission mechanism 12 includes a first drive gear 106 that constitutes a first drive system that slides the disk tray 5, and a second drive system that moves the drive unit 4 and a clamper described later up and down. The intermediate gear 107 and the second drive gear 108 are included. The first drive gear 106 includes a large-diameter gear 106a meshed with the outer peripheral gear 103 provided on the internal gear 99 of the planetary gear mechanism 91, and a small-diameter gear 106b concentrically provided with the large-diameter gear 106a. And have. The intermediate gear 107 has a large-diameter gear 107a meshed with the carrier gear 101 provided on the carrier 97 of the planetary gear mechanism 91, and a small-diameter gear 107b provided concentrically with the large-diameter gear 107a. is doing.

  The first drive gear 106 and the intermediate gear 107 are arranged on a second rotating shaft 109 erected in the power system housing unit 11 with the first drive gear 106 superimposed on the intermediate gear 107. It is supported rotatably. In this assembled state, as shown in FIG. 26, the large-diameter gear 106 a of the first drive gear 106 is engaged with the outer peripheral gear 103 of the internal gear 99. A main rack (tray side gear portion) 40 provided on the disc tray 5 is engaged with the small-diameter gear 106b of the first drive gear 106. Further, the large-diameter gear 107 a of the intermediate gear 107 is meshed with the carrier gear 101 of the carrier 97. The second drive gear 108 is meshed with the small diameter gear 107 b of the intermediate gear 107.

  The second drive gear 108 of the gear drive mechanism 92 is rotatably supported by a third rotation shaft 110 that is erected in the power system storage unit 11. In this assembled state, the second drive gear 108 is meshed with a rack portion (mounting portion side gear portion) 72 provided on the cam plate 64 of the left slide member 13. In FIG. 26, reference numeral 111 denotes a mounting screw that prevents the planetary gear mechanism 91 from falling off the first rotation shaft 104, and reference numeral 112 denotes a second rotation of the first drive gear 106 and the intermediate gear 107. A mounting screw that prevents the shaft 109 from falling off. Reference numeral 113 denotes a mounting screw for fixing the slide plate 63 and the cam plate 64 of the left slide member 13.

  As shown in FIGS. 3 and 4, a clamp bracket 120 that extends in a direction intersecting with the moving direction of the disk tray 5 is suspended over the main frame 3. The clamp bracket 120 has a rectangular flat surface portion 120a that crosses the upper surface of the main frame 3, and left and right side surface portions 120b and 120b that are continuous at a predetermined width at both ends in the longitudinal direction of the flat surface portion 120a. You may make it provide the rib part for a reinforcement continuous in a longitudinal direction in the both edges of the width direction of the plane part 120a.

  Both side surface portions 120b and 120b of the clamp bracket 120 have a left-right symmetric shape, and a bearing hole serving as a rotation center is provided at a rear portion in the front-rear direction. As shown in FIGS. 5, 6, 8, and 9, bearing protrusions 121 provided on the left and right side portions 3 b and 3 c of the main frame 3 are rotatably fitted in the bearing holes of the side portions 120 b. Are combined. In addition, a cam pin 122 is provided at a front portion of each side surface portion 120b in the front-rear direction so as to protrude sideways. The cam pin 122 rotates (lifts) the clamp bracket 120 in the vertical direction with the bearing protrusion 121 as the rotation center. The cam pin 122 is slidably engaged with a clamp cam groove 66 provided on the slide plate 63 (or 83).

  In order to allow the clamp bracket 120 to rotate, left and right side surfaces 3b and 3c of the main frame 3 are provided with inclined surfaces 123 having an inclination angle corresponding to the amount of rotation. By providing the clamp cam groove 66, the cam pin 122, and the inclined surface portion 123, the clamp bracket 120 is rotated by a predetermined angle between the horizontal state shown in FIGS. 27 and 28 and the inclined state shown in FIG. It is configured to move freely. In the horizontal state of the clamp bracket 120, the clamper 124 that is rotatably and detachably held by the flat surface portion 120a is in a state of being tilted with its front side slightly lifted (see FIGS. 27B and 28B). ). In the forward tilt state of the clamp bracket 120, the clamper 124 is held in a substantially horizontal state (see FIG. 29B).

  That is, a support portion 125 having a through hole 125a into which the clamper 124 is loosely fitted is provided at a substantially central portion on the front side of the flat portion 120a of the clamp bracket 120. The support part 125 has a support surface 125b in which a through hole 125a is opened and supports the clamper 124. The support surface 125b is inclined by a predetermined inclination angle α with respect to the main surface of the flat part 120a. (See FIG. 27B).

  The clamper 124 covers the fitting portion 18a of the turntable 18 and has a ring-shaped contact portion corresponding to the mounting portion 18b, and projects outward in the radial direction continuously to the outer peripheral edge of the clamper body 124a. The ring-shaped flange portion 124b, and the ring-shaped magnet 126 and the yoke 127 held by the clamper main body 124a. And it fits from the upper part into the through-hole 125a of the support part 125 provided in the plane part 120a of the clamp bracket 120, and is mounted in the support surface 125b by dead weight. A clamper 124 supported by the clamp bracket 120 is disposed above the turntable 18 of the drive unit 4, and an optical disk can be attached to and detached from the turntable 18.

  The left and right slide members 13 and 14 described above constitute a unit lifting mechanism that shows a specific example of the mounting portion moving mechanism that moves the drive unit 4 up and down. Also, the left and right slide plates 63 and 83 and the clamp bracket 120 constitute a clamper lifting mechanism that moves the clamper 124 up and down. Further, a shutter moving mechanism 51 that operates the tray shutter 44 is configured by the open / close slider 52, the transmission gear 53, and the return spring 54. Further, the planetary gear mechanism 91 and the gear drive mechanism 92 constitute a power transmission mechanism 12 that operates the unit elevating mechanism, the clamper elevating mechanism, and the shutter moving mechanism 51. The power transmission mechanism 12 is always connected to the first power transmission unit having the first drive gear 106 meshed with the main rack (tray side gear unit) 40 and the rack unit (mounting unit side gear unit) 72 at all times. A second power transmission unit having a meshed second drive gear, and a planetary gear mechanism 91 that switches a power transmission path from the drive motor 90 to the first power transmission unit and the second power transmission unit. It has.

The operation of the disk drive device 1 having such a configuration is, for example, as follows.
First, the operation of the power transmission mechanism 12 will be described. After turning on the power button 9a of the disk drive device 1 and then turning on the recording / reproducing button 9b, the drive motor 90 starts operating, and the rotational force is driven from the drive pulley 93 through the square belt 94. It is transmitted to the pulley 95. As a result, the sun gear 96 integral with the driven pulley 95 is rotationally driven in the same direction, and the rotational force is transmitted to the internal gear 99 via the planetary gear 98.

  At this time, the outer peripheral gear 103 integral with the internal gear 99 of the planetary gear mechanism 91 is engaged with the large-diameter gear 106a of the first drive gear 106, and the small-diameter gear 106b integral with the large-diameter gear 106a is engaged with the disc tray. 5 is engaged with the main rack 40. The carrier gear 101 provided integrally with the carrier 97 of the planetary gear mechanism 91 meshes with the large-diameter gear 107a of the intermediate gear 107, and the small-diameter gear 107b integral with the large-diameter gear 107a is engaged with the second drive gear 108. Are engaged. The second drive gear 108 meshes with a rack portion 72 provided on the cam plate 64 of the left slide member 13. From such an initial connected / coupled state, a series of operations at the time of loading as described below is executed.

1. During loading When the disc tray is open, as shown in FIGS. 2 and 6 to 8, the disc tray 5 moves to the front side and is positioned at the foremost end. Is the state of being greatly exposed. In this case, as shown in FIG. 30, the stopper 75 that is rotatably held by the main frame 3 enters the recess of the notch 76 provided in the cam plate 64 of the left slide member 13. Since the disc tray 5 is positioned on the stopper 75, the left slide member 13 is locked.

  In this state, since the second drive gear 108 meshing with the rack portion 72 of the cam plate 64 is locked, the carrier 97 connected via the intermediate gear 107 is fixed. Therefore, the rotational force transmitted to the planetary gear mechanism 91 is constrained in the drive side path DL, and the main rack of the disk tray 5 passes from the outer peripheral gear 103 of the internal gear 99 to the first drive gear 106 in the tray side path TL. 40. Based on the star drive of the planetary gear mechanism 91, the disk tray 5 moves rearward so as to retract, and enters the housing 2 from the tray entrance 8 of the front panel 7.

  In this case, when the disk tray 5 approaches the storage state in which the disk tray 5 is completely stored in the tray storage unit, the triangular fitting recess 81 provided on the side surface of the disk tray 5 moves above the stopper 75. Therefore, since a gap is formed by the fitting recess 81 above the stopper 75, the stopper 75 can be rotated upward (tray side) around the rotation shaft portion 75a. When the left slide member 13 moves to the front side, the stopper 75 is lifted by the inclined surface behind the notch 76 provided in the cam plate 64, and the stopper 75 is fitted into the fitting recess 81. As a result, the disc tray 5 is restrained by the stopper 75, and the disc tray 5 is locked at the tray storage position where the information signal is recorded / reproduced with respect to the optical disc.

  Thus, when the disk tray 5 comes to the storage position and the moving operation is finished (tray restraint state), the drive side path DL of the power transmission mechanism 12 is restrained (see FIG. 26). As a result, the planetary gear mechanism 91 is planetarily driven by fixing the internal gear 99 of the planetary gear mechanism 91, the tray side path TL is constrained, and the intermediate gear from the carrier gear 101 of the carrier 97 in the drive side path DL. The power is transmitted to the rack portion 72 of the cam plate 64 through 107 and the second drive gear 108. At this time, the left slide member 13 locked by the stopper 75 can be slid by pushing the stopper 75 because the lock is released at the tray storage position.

2. During Ejection FIG. 27 shows the chuck-up state. At this time, the stopper 75 enters the fitting recess 81 of the disc tray 5, and the cam plate 64 is positioned below the stopper 75. Therefore, the disc tray 5 is locked. In the locked state of the disc tray 5, the planetary gear mechanism 91 is planetary driven, so that the left and right slide members 13, 14 can be moved.

  Next, when the slide members 13 and 14 are in an operation end state, the notch 76 provided on the cam plate 64 moves below the stopper 75. Accordingly, the stopper 75 can be moved downward, and the stopper 75 enters the fitting recess 81. Therefore, the movement of the slide member 13 is restrained by the stopper 75 (slider restraint state). As a result, the drive-side path DL is constrained and the planetary gear mechanism 91 is driven in a star shape, so that the main side of the disc tray 5 passes through the first drive gear 106 from the outer peripheral gear 103 of the internal gear 99 in the tray-side path TL. A rotational force is transmitted to the rack 40.

  As a result, the rotational force is transmitted to the disc tray 5 which has been unlocked by the stopper 75 and can be moved, and the disc tray 5 moves so as to protrude outward from the tray entrance 8 of the front panel 7. Then, when the disc tray 5 moves forward to a predetermined position, the disc storage portion 41 is largely exposed in front of the tray entrance 8. As a result, the optical disk stored in the disk storage section 41 can be taken out, and a new optical disk can be placed in the disk storage section 41.

  In the power transmission mechanism 12 that is switched in this way, the gear train is always meshed, and a series of switching operations can be performed while always maintaining the meshed state. Therefore, in a series of switching operations, the meshing operation is not performed every time the switching is performed, and it is possible to prevent the generation of an impact sound at the start of meshing.

  Next, the chucking operation of the optical disc placed on the disc tray 5 and transported will be described. 27A and 27B are diagrams showing a state before the optical disk is chucked. At this time, the turntable 18 fixed to the rotating portion of the spindle motor 17 mounted on the base chassis 16 of the drive unit 4 is also in the front-down state because the base chassis 16 is in the front-down state. It has become. The clamp bracket 120 attached to the main frame 3 is substantially horizontal with respect to the frame portion 3a (FIG. 27A), but the support surface 125a of the support portion 125 provided on the clamp bracket 120 is disposed on the support surface 125a. There is an inclination angle α, and the clamper 124 is in a state of lowering back. Therefore, the turntable 18 and the clamper 124 are in a state where the front side is widely opened.

  From this state, when the disc tray 5 moves to a predetermined storage position, first, as shown in FIGS. 28A and 28B, the turntable 18 side is rotated upward. This ascending operation is executed by the elevating cam grooves 71 provided in the cam plates 64 and 84 of the left and right slide members 13 and 14. That is, when the left and right slide members 13, 14 move forward, the cam pins 37, 37 provided on the rotating bracket 35 attached to the base chassis 16 are formed in the lift cam grooves 71 provided on the cam plates 64, 84. It enters the inclined portion 71b from the lower horizontal portion 71a, slides up the inclined portion 71b, and moves to the upper horizontal portion 71c.

  Thereby, the front side of the base chassis 16 is rotated upward, and the turntable 18 is in a substantially horizontal state. At this time, the fitting portion 18a of the turntable 18 enters the central hole of the optical disc placed in the disc storage portion 41 of the disc tray 5. And the peripheral part of the center hole of an optical disk is supported by the mounting part 18b of the turntable 18. As shown in FIG.

  In this case, the horizontal state of the clamp bracket 120 is not changed by the movement of the left and right slide members 13 and 14. That is, cam pins 122 and 122 provided on the clamp bracket 120 are slidably engaged with the clamp cam grooves 66 and 66 provided on the slide plates 63 and 83 of the left and right slide members 13 and 14, respectively. The front horizontal portion 66a on which each cam pin 122 slides is horizontal. Therefore, the horizontal state of the clamp bracket 120 is not changed even when the cam pin 122 moves.

  Thereafter, when the cam pins 37, 37 of the rotating bracket 35 move from the inclined portion 71b to the upper horizontal portion 71c in the cam grooves 71 for raising and lowering the cam plates 64, 84, the upper horizontal portion 71c is formed only from the horizontal portion. Therefore, the horizontal state of the turntable 18 is maintained. On the other hand, when the cam pins 122, 122 of the clamp bracket 120 move from the front horizontal portion 66a of the clamp cam grooves 66, 66 to the rear horizontal portion 66c via the inclined portion 66b, as shown in FIGS. The bracket 120 is in a front-lowering state. The inclination angle of the clamp bracket 120 at this time is α.

  As a result, the clamper 124 held by the clamp bracket 120 is in parallel with the turntable 18. At this time, the clamper 124 is attracted to the magnetic iron pieces stored in the fitting portion 18a of the turntable 18 by the magnetic force of the magnet 126 stored in the clamper main body 124a. As a result, the clamper 124 is attracted to the turntable 18 in a state where the pressing surface of the clamper 124 is parallel to the mounting surface 18 b of the turntable 18. In this parallel state, the optical disk is sandwiched from above and below by the clamper 124 and the turntable 18 and is integrally rotated.

  At this time, the clamper 124 and the turntable 18 do not collide directly in a parallel state, but first, the turntable 18 changes from the inclined state to the horizontal state, and then the clamper 124 changes from the inclined state to the horizontal state. Thus, the operation timing is different. Therefore, the collision sound when the clamper 124 comes into contact with the turntable 18 can be suppressed, and the impact sound generated at the time of chucking can be effectively buffered.

  Next, the operation of the tray shutter 44 mounted on the disc tray 5 will be described. As shown in FIGS. 6 and 7, when the disc tray 5 is in the open state, the open / close slider 52 is attracted rearward by the spring force of the return spring 54. The rack portion 57 of the open / close slider 52 meshes with the small diameter gear 53 c of the transmission gear 53, and the large diameter gear 53 a of the transmission gear 53 meshes with the rack portion 45 of the tray shutter 44. Therefore, the tray shutter 44 is pressed forward of the tray by the spring force of the return spring 54 of the shutter moving mechanism 51, and the opening 42 of the disc storage portion 41 of the disc tray 5 is closed by the tray shutter 44.

  When the disc tray 5 is in the closed state, the open / close slider 52 comes into contact with the back surface of the main frame 3 during the retreating operation. Then, the open / close slider 52 is pushed by the back surface portion of the main frame 3 and moves forward against the spring force of the return spring 54. The movement of the open / close slider 52 is transmitted from the rack portion 57 to the rack portion 45 of the tray shutter 44 via the transmission gear 53. As a result, the tray shutter 44 moves rearward and the opening 42 of the disc storage portion 41 of the disc tray 5 is opened.

  At this time, the tray shutter 44 retreats larger than the range in which the optical pickup device 20 moves within the opening 42. Therefore, the opening 42 can be largely opened for the optical pickup device 20, and the presence of the tray shutter 44 does not interfere with the movement of the optical pickup device 20. Moreover, when the opening 42 of the disk storage unit 41 is closed by the tray shutter 44, it is possible to effectively prevent dust, dust, and the like from entering the housing 2 from there.

  As described above, according to the embodiment, it is possible to suppress the impact applied to the disc-shaped recording medium during chucking, and to suppress the impact sound generated during chucking. Furthermore, it is possible to prevent the generation of switching sound when switching the drive path in the power transmission mechanism. Further, by providing the tray shutter, the inside of the apparatus can be made invisible when the disc tray is opened, the appearance can be improved, and intrusion of dust, dust and the like can be prevented.

  In the above-described embodiment, the example in which the drive unit 4 is rotated and moved up and down has been described. However, the drive unit 4 may be moved in parallel and moved up and down. Further, the power transmission system of the tray transport mechanism that transports the disc tray 5 is described as the first power transmission unit, and the power transmission system of the mounting unit moving mechanism that moves the turntable 18 up and down is described as the second power transmission unit. On the contrary, the power transmission system of the tray transport mechanism may be configured as the second power transmission unit, and the power transmission system of the mounting unit moving mechanism may be configured as the first power transmission unit. Moreover, although the example using a rubber square belt as a power transmission member has been described, a belt having a round shape, a flat shape, or other shapes may be used, and a leather other than rubber, a metal belt, or the like. Of course, these materials can be applied.

1 shows an embodiment of a disk drive device of the present invention, and is an external perspective view in which a disk tray is stored. 1 shows an embodiment of a disk drive device of the present invention, and is an external perspective view of a disk tray popped out. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of a disk drive device according to the present invention, in which a housing is removed and a front panel is disassembled. 1 shows an embodiment of a disk drive device of the present invention, and is a plan view with a housing removed. FIG. 1 is a side view showing a disk drive device according to an embodiment of the present invention, with a housing removed. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a disk drive device of the present invention, with a housing removed and a disk tray popped out. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a disk drive device according to the present invention, and is a plan view in which a housing is removed and a disk tray is popped out. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a disk drive device of the present invention, and is a side view in which a housing is removed and a disk tray is popped out. 1 is a perspective view of a main frame according to a disk drive device of the present invention. 1 is a perspective view of a drive unit according to a disk drive device of the present invention. FIG. 3 is a perspective view of a disk tray and a tray shutter according to the disk drive device of the present invention. 1 is a perspective view of an open / close slider according to a disk drive device of the present invention. FIG. 3 is a perspective view of a transmission gear according to the disk drive device of the present invention. FIG. 14A is a perspective view of a slide plate and a cam plate, and FIG. 14B is a perspective view showing the opposite surface of the cam plate. It is an assembly perspective view of the left slide member concerning the disk drive device of the present invention. FIG. 16A is a perspective view of a slide plate and a cam plate, and FIG. 16B is a perspective view showing the opposite surface of the cam plate, showing a right slide member according to the disk drive device of the present invention. It is an assembly perspective view of the right slide member concerning the disc drive device of the present invention. It is explanatory drawing showing the power transmission mechanism which concerns on the disc drive apparatus of this invention. FIG. 8 is an explanatory diagram when a disc tray moves forward, explaining a synchronized state of operations of the left and right slide members according to the disc drive device of the present invention. FIG. 7 is an explanatory diagram when the disc tray is retracted, illustrating the synchronized state of the operations of the left and right slide members according to the disc drive apparatus of the present invention. It is a disassembled perspective view of the power transmission mechanism which concerns on the disc drive apparatus of this invention. It is the perspective view which decomposed | disassembled some power transmission mechanisms which concern on the disc drive apparatus of this invention. FIG. 2 is an assembled perspective view of a power transmission mechanism according to the disk drive device of the present invention. It is a top view of the power transmission mechanism which concerns on the disc drive apparatus of this invention. It is a front view of the power transmission mechanism which concerns on the disc drive apparatus of this invention. It is sectional drawing of the power transmission mechanism which concerns on the disc drive apparatus of this invention. The operations of the clamper lifting mechanism and the unit lifting mechanism according to the disk drive device of the present invention will be described. FIGS. 27A and 27B are explanatory diagrams showing the clamper lifting mechanism in the raised state and the unit lifting mechanism in the lowered state, respectively. The operations of the clamper lifting mechanism and the unit lifting mechanism according to the disk drive apparatus of the present invention will be described. FIGS. 28A and 28B are explanatory diagrams showing the clamper lifting mechanism and the unit lifting mechanism both in the lifted state. The operations of the clamper lifting mechanism and the unit lifting mechanism according to the disk drive apparatus of the present invention will be described. FIG. 29A and FIG. It is explanatory drawing of the non-locking state explaining operation | movement of the stopper which concerns on the disc drive apparatus of this invention. It is explanatory drawing of the locked state explaining operation | movement of the stopper which concerns on the disc drive apparatus of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disc drive apparatus, 2 ... Housing, 3 ... Main frame, 4 ... Drive unit, 5 ... Disc tray, 7 ... Front panel, 8 ... Tray inlet / outlet, 9a, 9b, 9c ... Operation button, 11 ... Power system storage part , 12: Power transmission mechanism, 13: Left slide member, 14: Right slide member, 16: Base chassis, 17: Spindle motor, 18: Turntable (disk mounting part), 20: Optical pickup device, 35: Rotating bracket 37. Cam pin, 40 Main rack (tray side gear), 44 Tray shutter, 45 Rack unit, 51 Shutter moving mechanism, 52 Opening / closing slider, 53 Transmission gear, 54 Return spring, 57 Rack Part, 63, 83 ... slide plate, 64, 84 ... cam plate, 65 ... guide length , 66. Cam groove for clamping, 67. Rack part, 71. Cam groove for lifting, 72. Rack part (mounting side gear part), 75. Stopper, 76. Notch part, 79. Guide groove, 81. 90, drive motor, 91 planetary gear mechanism, 92 gear drive mechanism, 96 sun gear, 97 carrier, 98 planetary gear, 99 internal gear, 101 carrier gear (output gear), 103 · · · Outer gear (output gear), 106 · 1st drive gear · 107 · Intermediate gear · 108 · Second drive gear · 120 · Clamp bracket · 122 · Cam pin · 124 · Clamper · α · Inclination angle · DL · Drive Side path, TL ... Tray side path

Claims (4)

A disc tray on which a disc-shaped recording medium for recording and / or reproducing information signals is placed;
A disc mounting portion on which the disc-shaped recording medium is detachably mounted and rotates the disc-shaped recording medium;
A tray transport mechanism for transporting the disk tray between a mounting position where the disk-shaped recording medium is mounted on the disk mounting portion and a take-out position where the disk-shaped recording medium can be taken out;
A mounting unit moving mechanism that moves the disk mounting unit between the mounting position and a retracted position away from the mounting position;
One drive motor,
A first power transmission portion having a first drive gear constantly engaged with the tray side gear portion for transmitting the power of the drive motor to the tray side gear portion of the tray transport mechanism; A second power transmission unit having a second drive gear constantly engaged with the mounting unit side gear unit that transmits to the mounting unit side gear unit of the mounting unit moving mechanism; and a power transmission path from the drive motor to the first power transmission unit. A disk drive device, comprising: a power transmission mechanism including a transmission path switching unit that switches between one power transmission unit and the second power transmission unit. The power transmission mechanism includes a sun gear that is rotationally driven by the drive motor, a planetary gear meshed with the sun gear, a carrier that rotatably supports the planetary gear, and an internal tooth meshed with the planetary gear. A planetary gear mechanism having a gear,
An output gear is provided for each of the carrier and the internal gear, and power is transmitted from one output gear to the first drive gear, and power is transmitted from the other output gear to the second drive gear. 2. The disk drive device according to claim 1, wherein: The mounting portion moving mechanism includes a base chassis on which the disc mounting portion is mounted and supported rotatably on the main frame, a slide member supported slidably on the main frame, and a slide of the slide member. The disk drive device according to claim 1, further comprising: a first cam mechanism that converts a movement operation into a rotation operation of the base chassis to raise and lower the disk mounting portion. A disk recording and / or reproducing device comprising a disk drive device for rotating and driving a disk-shaped recording medium and recording and / or reproducing information signals on the disk-shaped recording medium,
The disk drive device is
A disc tray on which a disc-shaped recording medium for recording and / or reproducing information signals is placed;
A disc mounting portion on which the disc-shaped recording medium is detachably mounted and rotates the disc-shaped recording medium;
A tray transport mechanism for transporting the disk tray between a mounting position where the disk-shaped recording medium is mounted on the disk mounting portion and a take-out position where the disk-shaped recording medium can be taken out;
A mounting unit moving mechanism that moves the disk mounting unit between the mounting position and a retracted position away from the mounting position;
One drive motor,
A first power transmission portion having a first drive gear constantly engaged with the tray side gear portion for transmitting the power of the drive motor to the tray side gear portion of the tray transport mechanism; A second power transmission unit having a second drive gear constantly engaged with the mounting unit side gear unit that transmits to the mounting unit side gear unit of the mounting unit moving mechanism; and a power transmission path from the drive motor to the first power transmission unit. 1. A disk recording and / or reproducing apparatus comprising: a power transmission mechanism including a power transmission unit and a transmission path switching unit that switches between the first power transmission unit and the second power transmission unit.

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