JP5246202B2 - Disk drive device - Google Patents

Description

  The present invention relates to a disk drive device that records and / or reproduces information signals with respect to an optical disk, and more particularly to a disk drive device that adopts a slot-in method.

  Conventionally, optical signal recording media such as CDs (Compact Discs) and DVDs (Digital Versatile Discs), MO (Magneto optical) type magneto-optical discs, and magneto-optical discs called MDs (Mini Discs) have been used as information signal recording media. Accordingly, there has been provided a disk drive device that uses this type of disk or a disk cartridge containing these disks as a recording medium.

  In a disk drive device that uses an optical disk as a recording medium, a type in which a cover and a door provided in a housing are opened and a disk is directly mounted on a turntable facing from the housing, a disk tray that is inserted into and removed from the housing in a horizontal direction A type in which a disc is placed on the disc and the disc tray is pulled into the cabinet, and is automatically mounted on a turntable provided inside the cabinet, or a disc is directly placed on the turntable provided in the disc tray. There is a type to install. In any of these disk drive devices, it is necessary to open and close the lid and the door, insert and remove the disk tray, or mount the disk on the turntable.

  On the other hand, there is a disk drive device using a slot-in type loading mechanism that can be automatically mounted on a turntable only by inserting a disk from a disk insertion / removal opening provided on the front surface of a housing. This disk drive device includes a pair of guide rollers that, when a disk is inserted from a disk insertion / removal opening, sandwiches the disk and pulls it into the housing. When the disc is inserted from the disc insertion slot, a pair of guide rollers rotate in opposite directions to perform a loading operation to be pulled into the housing, and when an ejection operation is performed, the loading operation is reversed. A pair of guide rollers are rotated in the direction, and the disc is ejected to the outside.

  Incidentally, in a mobile device such as a portable personal computer in which a disk drive device is mounted, there is a demand for further reduction in thickness as well as reduction in size and weight, and the disk drive device mounted in this type of mobile device. Therefore, further miniaturization, weight reduction, and thickness reduction are required. Further, in place of a tray-type disk drive device widely used in a portable personal computer, there is an increasing demand for a disk drive device using a slot-in type loading mechanism with a good operational feeling.

  Since the disk drive device using the slot-in type loading mechanism loads the disk as described above, it needs a pair of guide rollers for sandwiching and feeding the disk. Since the length of the disk is longer than the diameter of the disk, the overall width of the apparatus becomes longer. Further, since the disk is sandwiched between the pair of guide rollers, the dimension in the thickness direction is also greatly increased. For this reason, it is difficult to reduce the size and thickness of a conventional slot-in type disk drive device.

  In particular, a thin disk drive device mounted on a small mobile device such as a notebook personal computer having a portable size has a standard thickness of 12.7 mm, and a hard disk drive. What is thinned to 9.5 mm which is the same thickness as the (HDD) unit is used. In the disk drive apparatus thinned to such a thickness, it is extremely difficult to adopt a slot-in type loading mechanism using a pair of guide rollers.

  Therefore, in a disk drive device adopting a slot-in type loading mechanism, a base inserted with a disk inserted from the disk insertion / removal opening and a turntable on which the disk is mounted is installed in order to meet the demand for miniaturization and thinning. A plurality of rotating arms, and a loading operation for pulling the disk from the disk insertion / removal opening into the housing while rotating these rotating arms in a plane parallel to the inserted disk, There has been proposed an ejecting operation for ejecting a disk from the disk insertion / removal port to the outside of the housing (see Patent Document 1).

  By the way, in the disk drive device adopting such a thin slot-in method, the base is lifted and the chucking position where the disk is mounted on the turntable, and the base is lowered and the disk is detached from the turntable. A base lifting mechanism that lifts and lowers the base between a chucking release position and an intermediate position where the base is positioned between the chucking position and the chucking release position to record or play back an information signal with respect to the disc. .

  Specifically, the base elevating mechanism has a slide member formed with a cam groove that is supported by being engaged with a support shaft protruding from the side surface of the base, and the slide member supports the side surface of the base. However, the base is moved up and down by sliding along the side surface of the base. In a disk drive device having such a base lifting mechanism, rattling is likely to occur between the support shaft of the base and the cam groove of the slide member. In particular, in a thinned slot-in type disk drive device, the disk and the device are changed when the attitude of the base supporting the optical pickup changes due to the above-described backlash or when vibration or impact is applied to the device itself. The clearance with the internal parts is extremely reduced, and the disk comes into contact with the internal parts of the apparatus. As described above, when the disc is in contact with the components inside the apparatus, the disc cannot be stably rotated, and not only good recording / reproduction but also the disc may be damaged.

JP 2002-117604 A

  Therefore, the present invention has been proposed in view of such a conventional situation, and an object thereof is to provide a disk drive device that prevents the occurrence of backlash of the base when recording or reproducing information signals. To do.

In order to achieve this object, the disk drive device according to the present invention is inserted into the housing from the disk insertion / removal port with a housing provided with a disk insertion / removal port through which an optical disk is inserted / removed. A disk mounting unit on which an optical disk is mounted, a disk rotation driving mechanism for rotating the optical disk mounted on the disk mounting unit, and an information signal recorded on or reproduced from the optical disk rotated by the disk rotation driving mechanism An optical pickup; a pickup feeding mechanism for feeding the optical pickup in a radial direction of the optical disc; and a base unit integrally formed on the base, and the optical disc is inserted / removed from the disc insertion / removal opening A disk insertion / removal position, and a disk mounting position at which the optical disk is mounted on the disk mounting portion. A disk transport mechanism for transporting the optical disk between them, a chucking position for raising the base to mount the optical disk on the disk mounting portion, and a chuck for lowering the base and removing the optical disk from the disk mounting portion. Base lift that raises and lowers the base between a king release position and an intermediate position where the base is positioned between the chucking position and the chucking release position to record or reproduce information signals on the optical disc. A cam groove that is supported by a support shaft protruding from the side surface of the base. And a slide member that slides along the side surface of the base while supporting the side surface of the base. When the slide member is slid, the base is moved up and down while the support shaft slides in the cam groove, and the backlash prevention mechanism moves the support shaft to one side of the inner surface of the cam groove. The pressing member has a guide groove having a shape corresponding to the cam groove into which the support shaft enters, and is movably attached to the slide member and moved by a biasing means. As the slide member is slid, the support shaft slides in the cam groove and the guide groove while the pressing member is integrated with the slide member. When the slide member is slid to the intermediate position, the support shaft comes into contact with the end of the guide groove , and the push member is pushed against the slide member. When the urging member is moved to the other side in the moving direction against the urging force of the urging means, the urging member causes the urging force of the urging means to move the support shaft to one of the inner surfaces of the cam groove. It pushes to the side.

  In the disk drive device according to the present invention, when the base is in the intermediate position, the occurrence of backlash of the base is suppressed by the backlash prevention mechanism. Therefore, the disk mounted on this device and the disk mounted inside the device are disposed inside the device. Contact with parts can be prevented, stable rotation of the disk can be achieved, good recording and reproduction can be realized, and further, the disk can be protected.

1 is a perspective view showing an external appearance of a notebook personal computer equipped with a disk drive device according to the present invention. It is a perspective view which shows the external appearance of a disk drive apparatus. It is the perspective view which looked at the top cover from the inner surface side. 1 is a plan view showing a disk drive device according to the present invention. It is a perspective view which shows the base unit which comprises the disk drive apparatus based on this invention. It is a top view which shows the initial state of a disk drive apparatus. It is a top view which shows the state from which a large diameter optical disk is started to be inserted in a disk drive device. It is a top view which shows the drawing start state in which a large diameter optical disk is drawn in to a disk drive apparatus. It is a top view which shows a delivery state when a large diameter optical disk is drawn in to a disk drive apparatus. It is a top view which shows the state by which the large diameter optical disk was centered with respect to the turntable by the disk drive apparatus. It is a top view which shows the state by which the large diameter optical disk was chucked by the turntable. It is a top view which shows the state by which the chucking cancellation | release of the large diameter optical disk was carried out. It is a top view which shows the state which ejects a large diameter optical disk. It is a top view which shows the delivery state at the time of ejecting a large diameter optical disk. It is a top view which shows the state which ejected the large diameter optical disk. It is a top view which shows the state from which insertion of a small diameter optical disk is started to a disk drive apparatus. It is a top view which shows the state in which a small diameter optical disk is drawn in a disk drive apparatus. It is a top view which shows the delivery state when a small diameter optical disk is drawn in to a disk drive apparatus. It is a top view which shows the state by which the small diameter optical disk was centered with respect to the turntable by the disk drive apparatus. It is a top view which shows the state by which the small diameter optical disk was chucked by the turntable. It is a top view which shows the state by which the small diameter optical disk was dechucked. It is a top view which shows the state which ejects a small diameter optical disk. It is a top view which shows the delivery state at the time of ejecting a small diameter optical disk. It is a top view which shows the state which ejected the small diameter optical disk. It is a top view which shows the state which ejects a small diameter optical disk. It is a side view which shows the state which has a base unit in a chucking release position. It is a side view which shows the state which has a base unit in a chucking position. It is a side view which shows the state which has a base unit in an intermediate position. It is a top view which shows the state in which a large diameter optical disk and a small diameter optical disk are centered with respect to a turntable. It is a top view which shows the other example of a disk drive apparatus. FIG. 31 is a plan view showing a state where a large-diameter optical disk and a small-diameter optical disk inserted into the disk drive device shown in FIG. 30 are centered with respect to the turntable. It is a top view which shows the other example of a disk drive apparatus. It is a top view which shows the state which removed the top cover of the disk drive apparatus. It is a top view which shows the state which removed some components of the disk drive apparatus. It is a top view which shows the state which removed some components of the disk drive apparatus. It is a top view which shows the positional relationship of the drive lever and detection switch of a disk drive apparatus. The drive lever is shown, (a) is a side view seen from one side, (b) is a plan view seen from above the drive lever, (c) is a side view seen from the other side. (D) is a plan view of the drive lever as viewed from below. A cam lever is shown, (a) is the top view, (b) is the side view. The drive lever at the time of loading operation | movement is shown, (a) is the top view seen from the downward side, (b) is the top view. The drive lever at the time of eject operation | movement is shown, (a) is the top view seen from the downward side, (b) is the top view. It is a top view which shows the state in which a large diameter optical disk is inserted in a disk drive apparatus. It is a top view which shows the state in which a large diameter optical disk is loaded by the disk drive apparatus. It is a top view which shows the state in which the large diameter optical disk was centered and inserted. It is a top view which shows the state by which the large diameter optical disk was chucked by the turntable. It is a top view which shows the state which records and reproduces | regenerates an information signal with respect to a large diameter optical disk. It is a top view which shows the state which ejects a large diameter optical disk from a disk drive apparatus. It is a top view which shows the state which ejected the large diameter optical disk from the disk drive apparatus. It is a top view which shows the state in which a small diameter optical disk is inserted in a disk drive apparatus. It is a top view which shows the state by which a small diameter optical disk is loaded by the disk drive apparatus. It is a top view which shows the state in which the small diameter optical disk was centered and inserted. It is a top view which shows the state by which the small diameter optical disk was chucked by the turntable. It is a top view which shows the state which records and reproduces | regenerates an information signal with respect to a small diameter optical disk. It is a top view which shows the state which ejects a small diameter optical disk from a disk drive apparatus. It is a top view which shows the state which ejected the large diameter optical disk from the disk drive apparatus. It is a top view which shows the state in which the small diameter optical disk was inserted near the one side of a disk drive apparatus. It is a top view which shows the operation state of the 3rd rotation arm at the time of ejection in order of operation. It is a principal part top view which shows the engagement state of a press lever and a drive lever. The operation of the base lifting mechanism is shown, (a) is a plan view showing a state where the base unit is in the chucking release position, and (b) is the second support shaft of the base and the cam piece at the chucking release position. It is a side view which shows the positional relationship with a 2nd cam groove, (c) is a side view which shows the positional relationship between the 1st spindle of a base in the chucking release position, and the 1st cam groove of a drive lever. (D) is a side view showing the position of the base unit at the chucking release position. The operation of the base lifting mechanism is shown, (a) is a plan view showing a state where the base unit is in the chucking position, and (b) is the second support shaft of the base and the second of the cam piece at the chucking position. (C) is a side view showing the positional relationship between the first support shaft of the base and the first cam groove of the drive lever at the chucking position; (D) is a side view showing the position of the base unit at the chucking position. The operation of the base lifting mechanism is shown, (a) is a plan view showing a state in which the base unit is at an intermediate position, and (b) is the second support shaft of the base and the second cam of the cam piece at the intermediate position. It is a side view which shows the positional relationship with a groove | channel, (c) is a side view which shows the positional relationship between the 1st spindle of a base and the 1st cam groove of a drive lever in the intermediate position, (d) FIG. 5 is a side view showing the position of the base unit at the intermediate position. 6 is a timing chart showing switching states of a first switch, a second switch, a third switch, and a fourth switch during an initial operation in a state where an optical disk is inserted into the disk drive device. 6 is a timing chart showing switching states of a first switch, a second switch, a third switch, and a fourth switch during an initial operation when an optical disc is not inserted into the disc drive apparatus. 6 is a timing chart showing switching states of a first switch, a second switch, a third switch, and a fourth switch when an optical disk is loaded into the disk drive device. 6 is a timing chart showing switching states of a first switch, a second switch, a third switch, and a fourth switch when ejecting a large-diameter optical disk mounted on a disk drive device. 6 is a timing chart showing switching states of a first switch, a second switch, a third switch, and a fourth switch when ejecting a small-diameter optical disk mounted on a disk drive device. It is a top view which shows the positional relationship of a 1st disk guide mechanism, a 2nd disk guide mechanism, a shutter opening / closing mechanism, and a small diameter optical disk. It is a top view which shows the positional relationship with a 1st disk guide mechanism, a 2nd disk guide mechanism, and a shutter opening / closing mechanism, and a large diameter optical disk and a small diameter optical disk. It is a principal part figure which shows a 1st disc guide mechanism. It is a principal part front view which shows a shutter opening / closing mechanism. FIG. 4 is a cross-sectional view showing the operation of the first disc guide mechanism and the shutter opening / closing mechanism, where (a) is a cross-sectional view showing a state where the base unit is in the chucking release position, and (b) is a recording / reproducing operation performed by the base unit. It is sectional drawing which shows the state in a position. FIG. 6 is a cross-sectional view showing the operation of the second disc guide mechanism, (a) is a cross-sectional view showing a state in which the base unit is in the chucking release position, and (b) is a state in which the base unit is in the recording / reproducing position. It is sectional drawing shown. It is a side view which shows a rattling prevention mechanism, (a) is a side view which shows the state before pressing a 2nd spindle to one side of the inner surface of a 2nd cam slit, (b) is 2nd It is a side view which shows the state by which the spindle was pressed on the one side of the inner surface of the 2nd cam slit. Another example of the rattling prevention mechanism is shown, (a) is a side view showing a state before the second support shaft is pressed against one side of the inner surface of the second cam slit, and (b) is a second view. It is a side view which shows the state by which the spindle was pressed on the one side of the inner surface of the 2nd cam slit. Still another example of the rattling prevention mechanism is shown, (a) is a side view showing a state before the second support shaft is pressed against one side of the inner surface of the second cam slit, and (b) is a second view. It is a side view which shows the state by which this support shaft was pressed on the one side of the inner surface of the 2nd cam slit.

  Embodiments of a disk drive device to which the present invention is applied will be described in detail below with reference to the drawings.

  As shown in FIG. 1, a disk drive device to which the present invention is applied is a disk drive device 1 mounted on a device main body 1001 of a notebook personal computer 1000 reduced to a portable size. This is a disk drive device using a slot-in type loading mechanism. The disk drive device 1 is thinned. As shown in FIG. 2, the thickness D1 of the entire device is 12.7 mm, and an optical disk such as a CD (Compact Disc) or a DVD (Digital Versatile Disc). 2 is used as a recording medium, and an information signal is recorded on the optical disc 2 and a recording / reproducing mechanism for reproducing the information signal recorded on the optical disc 2 is incorporated.

  This disk drive device 1 can mount a standard size disk having a diameter of 12 cm and a disk having a diameter smaller than that of the large diameter optical disk by 8 cm.

  First, a specific configuration of the disk drive device 1 will be described.

  As shown in FIG. 2, the disk drive device 1 includes a housing 3 that constitutes the device main body. The casing 3 includes a flat casing-shaped bottom case 4 that is a lower casing, and a top cover 5 that is a top plate that covers an upper opening of the bottom case 4.

  As shown in FIGS. 2 and 3, the top cover 5 is made of a thin sheet metal, and is formed by bending a top plate portion 5a that closes the upper opening of the bottom case 4 and opposite sides of the top plate portion 5a. And a pair of side plate portions 5b, 5b. A circular opening 6 is formed at a substantially central portion of the top plate portion 5a. The opening 6 is provided so that the engaging protrusion 28a of the turntable 23a that is engaged with the center hole 2a of the optical disc 2 is exposed to the outside during a chucking operation described later. Further, the periphery of the opening 6 of the top plate portion 5a slightly protrudes toward the inside of the housing 3 so as to come into contact with the periphery of the center hole 2a of the optical disc 2 held on the turntable 23a. A contact protrusion 7 is formed.

  On the inner main surface of the top plate portion 5a, a distal end portion of a first rotating arm 35 and a distal end portion of a second rotating arm 36, which will be described later, are contiguous or separated from each other while being regulated in the height direction. A guide member 8 for guiding in the direction is provided. The guide member 8 is made of a sheet metal having a substantially arc shape between both side plate portions 5b of the top plate portion 5a, and is attached to the front side of the top plate 5a by spot welding or the like. Further, the guide member 8 has a stepped portion 8a whose back side is made one step higher than the mounting surface on the front side. As a result, the front end portion of the first rotating arm 35 and the front end portion of the second rotating arm 36 are engaged between the step portion 8a on the back side of the guide member 8 and the top plate portion 5a. Guide grooves 9 are formed. The top plate portion 5a has working window portions 10 for engaging the guide groove 9 with the tip portion of the first turning arm 35 and the tip portion of the second turning arm 36, respectively. Is provided.

  As shown in FIG. 4, the bottom case 4 is formed in a flat housing shape using sheet metal, its bottom surface portion is formed in a substantially rectangular shape, and one side surface portion is raised above the bottom surface portion. A wing portion 4a projecting outward is provided.

  Although not shown in the bottom of the bottom case 4, electronic components such as an IC chip constituting the drive control circuit, connectors for electrical connection of each part, detection for detecting the operation of each part A circuit board on which a switch or the like is arranged is attached by screwing or the like. A chassis 11 is attached to the bottom surface of the bottom case 4 by screws. The chassis 11 is disposed above the circuit board so as to partition the inside of the bottom case 4 vertically at a height substantially equal to that of the wing portion 4a.

  As shown in FIG. 2, the top cover 4 is attached to the bottom case 5 by screws. Specifically, as shown in FIG. 3, a plurality of screw insertion holes 13 for inserting the screws 12 are formed in the outer peripheral edge of the top plate portion 5a. The side plate portions 5b on both sides are provided with a plurality of guide pieces 14 that are bent at substantially right angles toward the top plate portion 5a side. On the other hand, as shown in FIG. 4, a plurality of fixing pieces 15 bent at a substantially right angle are provided on the outer peripheral edge of the bottom case 4, and the fixing pieces 15 are screwed on the top cover 5. A screw hole 16 corresponding to the insertion hole 13 is formed. In addition, a plurality of guide grooves 17 that prevent the plurality of guide pieces 14 of the top cover 5 from coming off are formed on both side surfaces of the bottom case 4.

  When the top cover 5 is attached to the bottom case 4, the top cover 5 is moved from the front side to the back side in a state where the plurality of guide pieces 14 of the top cover 5 are engaged with the plurality of guide grooves 17 of the bottom case 4. Slide. Thereby, the top plate part 5 a of the top cover 5 is in a state of closing the upper opening of the bottom case 4. In this state, the screws 12 are screwed into the screw holes 16 of the bottom case 4 from the plurality of screw insertion holes 13 of the top cover 5. As described above, the housing 3 constituting the apparatus main body as shown in FIG. 2 is formed.

  Note that a label (not shown) is attached to the top plate portion 5a of the top cover 5 after the assembly so as to cover the opening 6 and the working window 10 described above. This prevents dust and the like from entering the housing 3.

  As shown in FIG. 2, a flat front panel 18 having a long rectangular shape is attached to the front side of the housing 3. The front panel 18 is provided with a disk insertion / removal opening 19 through which the optical disk 2 is inserted and removed in the horizontal direction. That is, the optical disk 2 is inserted into the housing 3 from the disk insertion / removal opening 19 and is discharged from the disk insertion / removal opening 19 to the outside of the housing 3. In addition, on the front surface of the front panel 18, a display unit 20 that lights and displays an access state to the optical disc 2 and an eject button 21 that is pressed when ejecting the optical disc 2 are provided.

  As shown in FIGS. 4 and 5, the disk drive device 1 is provided with a base unit 22 that constitutes a drive unit main body on the bottom surface of the bottom case 4.

  The base unit 22 includes a disk mounting portion 23 to which the optical disk 2 inserted into the housing 3 from the disk insertion / removal opening 19 is mounted, and a disk rotation drive for rotating the optical disk 2 mounted to the disk mounting section 23. A mechanism 24; an optical pickup 25 that writes or reads signals to / from the optical disk 2 that is rotationally driven by the disk rotational drive mechanism 24; and a pickup feeding mechanism 26 that feeds the optical pickup 25 in the radial direction of the optical disk 2. These constitute an ultra-thin structure provided integrally with the base 27.

  The base unit 22 is disposed on the front side of the chassis 11 so that the disk mounting portion 23 is located at a substantially central portion of the bottom surface portion of the bottom case 4. The base unit 22 can be moved up and down by a base lifting mechanism 55 described later, and is positioned below the optical disk 2 inserted into the housing 3 from the disk insertion / removal port 19 in the initial state.

  The base 27 is formed by punching a metal plate into a predetermined shape and slightly bending the periphery downward. On the main surface of the base 27, a substantially semicircular table opening 27a for facing a turntable 23a of a disk mounting portion 23 described later upward, and an objective lens 25a for an optical pickup 25 described later facing upward. A substantially rectangular pickup opening 27b is continuously formed. A decorative board (not shown) in which openings corresponding to the openings 27a and 27b are formed is attached to the upper surface of the base 27.

  The disc mounting portion 23 has a turntable 23a that is rotationally driven by a disc rotation drive mechanism 24, and a chucking mechanism 28 for mounting the optical disc 2 is provided at the center of the turntable 23a. The chucking mechanism 28 engages with the center hole 2a of the optical disc 2 and performs an engaging projection 28a that performs centering so that the rotation center of the optical disc 2 coincides with the rotation center of the turntable 23a, and the engagement projection 28a. There are provided a plurality of pressing support pieces 28b that press the inner peripheral surface of the center hole 2a of the engaged optical disc 2 and support the optical disc 2 so as to rotate integrally with the turntable 23a.

  The disk rotation drive mechanism 24 includes a flat spindle motor 24a that rotates the optical disk 2 integrally with the turntable 27a. The spindle motor 24a is attached to the lower surface of the base 27 by screws so that the turntable 23a attached to the tip of the drive shaft slightly protrudes from the table opening 27a of the base 27. ing.

  The optical pickup 25 condenses the light beam emitted from the semiconductor laser serving as the light source by the objective lens 25 a and irradiates the signal recording surface of the optical disc 2, and returns the light beam reflected by the signal recording surface of the optical disc 2. And an optical block that detects light by a light detector composed of a light receiving element or the like, and writes or reads signals to or from the optical disk 2.

  In addition, the optical pickup 25 is configured so that the objective lens 25a has a focusing direction parallel to the optical axis of the objective lens 25a and a plane direction orthogonal to the optical axis of the objective lens 25a, and a recording track of the optical disc. It has an objective lens drive mechanism that drives displacement in the orthogonal tracking direction, and based on the detection signal from the optical disc 2 detected by the above-mentioned photodetector, the objective lens 25a is used to focus the objective lens 25a. Focus servo that focuses the objective lens 25a on the signal recording surface of the optical disc 2 while displacing in the tracking direction and the tracking direction, and tracking servo driving in which the spot of the light beam condensed by the objective lens 25a follows the recording track Take control. As the objective lens driving mechanism, in addition to such focusing control and tracking control, the signal of the optical disc 2 is irradiated so that the light beam condensed by the objective lens 25a is irradiated perpendicularly to the signal recording surface of the optical disc 2. The inclination of the objective lens 25a with respect to the recording surface may be configured to enable tilt adjustment.

  The pickup feeding mechanism 26 includes a pickup base 29 on which the optical pickup 25 is mounted, a pair of guide shafts 30a and 30b that support the pickup base 29 so as to be slidable in the radial direction of the optical disc 2, and the pair of guide shafts 30a and 30a. And a feed drive mechanism 31 that feeds the pickup base 29 supported by 30b in the radial direction of the optical disc 2.

  Of the pair of guide shafts 30a and 30b, the pickup base 29 is formed with a pair of guide pieces 32a and 32b formed with a guide hole through which one guide shaft 30a is inserted, and a guide groove for sandwiching the other guide shaft 30b. The guide pieces 33 are formed so as to protrude from the side surfaces facing each other. Thereby, the pickup base 29 is slidably supported by the pair of guide shafts 30a and 30b.

  The pair of guide shafts 30a and 30b are disposed on the lower surface of the base 27 so as to be parallel to the radial direction of the optical disc 2, and the optical pickup 25 is exposed to the optical pickup 25 through the pickup opening 27b of the base 27. 2 is guided over the inner and outer peripheries.

  The feed drive mechanism 31 converts the rotational drive of the drive motor 31a attached to the base 27 into linear drive via a gear or a rack (not shown), and moves the pickup base 29 along a pair of guide shafts 30a and 30b. And moving in the radial direction of the optical disc 2.

  As shown in FIG. 4, the disk drive apparatus 1 includes a disk insertion / removal position where the optical disk 2 is inserted / removed from the disk insertion / removal port 19 and a disk mounting position where the optical disk 2 is mounted on the turntable 23a of the disk mounting portion 23. And a disk transport mechanism 34 for transporting the optical disk 2 between them.

  The disk transport mechanism 34 is used as a support member that is operated to move between the main surface of the top plate portion 5a facing the disk mounting portion 23 and the main surface of the optical disk 2 inserted from the disk insertion / removal port 19. The first rotation arm 35 and the second rotation arm 36 are configured to be rotatable in a plane parallel to the two main surfaces.

  The first rotating arm 35 and the second rotating arm 36 are arranged on both the left and right sides of the disc mounting portion 23, respectively, and are proximal end portions located on the back side of the disc mounting portion 23, respectively. Is supported in a rotatable manner, and the front end portion located on the front side of the disc mounting portion 23 is close to or away from each other within a plane parallel to the main surface of the optical disc 2 inserted from the disc insertion / removal port 19. It can be turned.

  Specifically, the first rotating arm 35 is formed of a long metal plate, and is positioned on one of the left and right sides (for example, the right side in FIG. 4) sandwiching the turntable 23a of the disk mounting portion 23. A proximal end portion is supported via a first support shaft 37 provided on the chassis 11 so as to be rotatable in the arrow a1 direction and the arrow a2 direction. A first front-side abutting member 38 that abuts on the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 protrudes downward from the tip of the first rotating arm 35. It has been. Further, in the vicinity of the base end portion of the first rotating arm 35, when the optical disc 2 is positioned at the disc mounting position, the first front-side abutting member 38 and the outer peripheral portion of the optical disc 2 are abutted. One rear side contact member 39 is provided so as to protrude downward.

  The first front-side contact member 38 and the first back-side contact member 39 are formed using synthetic resin, and a central portion that comes into contact with the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 is formed. The flange portions 38a and 39a that are curved inward and whose both end portions are enlarged in diameter have a substantially drum shape that restricts the movement of the optical disc 2 in the height direction. Here, when the first front-side contact member 38 and the first back-side contact member 39 have a structure in contact with the main surface of the optical disc 2, these members 38 and 39 are larger than the optical disc 2. It is desirable to be formed with a soft resin. The first front-side contact member 38 and the first back-side contact member 39 are small-diameter rotating rollers that are rotatably attached to the main surface of the first rotating arm 35 that faces the disc mounting portion 23. It may be.

  On the other hand, the second rotating arm 36 is also formed of a long metal plate, and is located on the other left and right sides (for example, the left side in FIG. 4) sandwiching the turntable 23a of the disk mounting portion 23, and has a proximal end. The part is supported via a first support shaft 37 provided on the chassis 11 so as to be rotatable in the direction of the arrow b1 and the arrow b2. A second front-side abutting member 40 that abuts on the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 protrudes downward from the tip of the second rotating arm 36. It has been.

  The second front-side contact member 40 has an optical disc as a flange portion 40a in which a central portion that comes into contact with the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal opening 19 is curved inward, and both ends thereof are expanded in diameter. 2 has a substantially hourglass shape that restricts movement in the height direction. Here, when the second front-side contact member 40 has a structure in contact with the main surface of the optical disc 2, the second front-side contact member 40 is formed of a softer resin than the optical disc 2. It is desirable. The second front contact member 40 may be a small-diameter rotating roller that is rotatably attached to the main surface of the second rotating arm 36 that faces the disc mounting portion 23.

  As described above, the first rotation arm 35 and the second rotation arm 36 are disposed at positions that are substantially symmetrical with the turntable 23 a of the disk mounting portion 23 interposed therebetween. Further, as in the present embodiment, the structure can be simplified by the mutual rotation centers being coincident with each other at a substantially central portion on the back side of the disk mounting portion 23. Further, the distal end portion of the first rotation arm 35 and the distal end portion of the second rotation arm 36 are slidable along the rotation direction while being engaged with the guide groove 9 of the top plate portion 5a. It is supported by.

  The disk transport mechanism 34 has an interlocking mechanism 41 for interlocking the first rotating arm 35 and the second rotating arm 36, and the first rotating arm is connected via the interlocking mechanism 41. 35 and the second rotation arm 36 are rotatable in opposite directions. Specifically, the interlocking mechanism 41 includes a first connecting arm 42 and a second connecting arm 43 that connect the first rotating arm 35 and the second rotating arm 36. The first connecting arm 42 and the second connecting arm 43 are made of a long metal plate, and one end in the longitudinal direction of each of the first connecting arm 42 and the second connecting arm 43 is the base end of the first rotating arm 35 and the second rotating arm. 36 has a so-called pantograph structure in which the other end portion in the longitudinal direction is rotatably supported via a second support shaft 44. The second support shaft 44 is engaged with a guide groove 45 provided on the front side of the first support shaft 37 of the chassis 11, and the guide groove 45 extends in the insertion direction of the optical disc 2. It is formed in a straight line.

  Therefore, the first rotating arm 35 and the second rotating arm 36 are configured such that the first connecting arm 42 and the second connecting arm 43 are formed by the second support shaft 44 sliding in the guide groove 45. It is possible to rotate in opposite directions via each other. That is, the distal end portion of the first rotation arm 35 and the distal end portion of the second rotation arm 36 can be rotated in the direction of approaching or separating from each other by such an interlocking mechanism 41.

  In addition, a torsion coil spring (not shown), which is an urging means for urging the rotating arms 35 and 36 toward each other, is provided at the base end portions of the first rotating arm 35 and the second rotating arm 36. Z.) is provided.

  The disk transport mechanism 34 is parallel to the main surface of the optical disk 2 inserted from the disk insertion / removal opening 19 as a loading assisting means for assisting a loading operation for drawing the optical disk 2 into the housing 3 from the disk insertion / removal opening 19. A third rotation arm 46 that is rotatable in the plane is provided.

  The third rotating arm 46 is made of a long metal plate, and is on the front side of the second rotating arm 36 on one of the left and right sides (for example, the left side in FIG. 4) sandwiching the turntable 23a of the disk mounting portion 23. Located on the side, the base end portion is supported so as to be rotatable in the direction of the arrow c1 and the direction of the arrow c2 via a support shaft 47 provided on the wing portion 4a. Further, a third abutting member 48 that abuts on the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 protrudes upward from the tip of the third rotating arm 46. Yes.

  The third abutting member 48 is a small-diameter rotating roller made of synthetic resin that is rotatably attached to the main surface of the third rotating arm 46 facing the top plate portion 5a. The third abutting member 48 has an optical disc 2 as a flange portion 40a in which a central portion that abuts on the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal opening 19 is curved inward and both ends thereof are enlarged. It has a drum shape that restricts movement in the thickness direction.

  The disk transport mechanism 34 is parallel to the main surface of the optical disk 2 inserted from the disk insertion / removal opening 19 as an ejection assisting mechanism for assisting an ejection operation for discharging the optical disk 2 from the disk insertion / removal opening 19 to the outside of the housing 3. A fourth rotating arm 49 that can be rotated in a plane.

  The fourth rotation arm 49 is made of a long sheet metal, and is an intermediate portion of the second rotation arm 36 on one side on the left and right sides (for example, the left side in FIG. 4) sandwiching the turntable 23a of the disk mounting portion 23. Are supported so as to be rotatable in the directions of the arrows d1 and d2. A fourth abutting member 50 that abuts on the back side of the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 protrudes upward at the tip of the fourth rotating arm 49. Is provided.

  The fourth abutting member 50 is formed using a synthetic resin, a central portion that abuts on the outer peripheral portion of the optical disc 2 inserted from the disc insertion / removal port 19 is curved inward, and both end portions thereof are expanded in diameter. The flange portion 50a has a drum shape that restricts movement of the optical disc 2 in the thickness direction. The fourth contact member 50 may be a small-diameter rotating roller that is rotatably attached to the main surface of the fourth rotating arm 49 that faces the top plate portion 5a.

  Further, when the fourth rotating arm 49 is rotated in the back side, that is, in the direction of the arrow d1, the second rotating arm 36 is rotated to the back side. A restriction piece 51 is provided to restrict the movement.

  The disk transport mechanism 34 has a drive lever 52 for causing the above-described rotating arms 35, 36, 46, 49 to cooperate. The drive lever 52 is made of a resin member formed in a substantially rectangular parallelepiped shape as a whole, and is disposed between one side surface portion of the bottom case 4 and the base unit 22 on the bottom surface portion of the bottom case 4. The drive lever 52 is positioned below the optical disk 2 inserted into the housing 3 from the disk insertion / removal opening 19 and has a top surface substantially equal to the bottom surface of the wing 4a. Have. The drive lever 52 is slidably driven in the front-rear direction of the arrow X1 direction and the arrow X2 direction in FIG. 4 via a drive mechanism (not shown) including a drive motor and a gear group provided on the bottom surface of the bottom case 4. The

  In the disk transport mechanism 34, the above-described second support shaft 44 slides in the guide groove 45 in conjunction with the sliding operation of the drive lever 52. Thereby, the first rotation arm 35 and the second rotation arm 36 are rotated in the opposite directions via the interlocking mechanism 41. Further, a guide pin 54 that is engaged with a guide groove 53 provided on the upper surface of the drive lever 52 is provided on the proximal end side of the third rotating arm 46. Accordingly, the third rotation arm 46 is rotated by the guide pin 54 sliding in the guide groove 53 in conjunction with the slide operation of the drive lever 52. The fourth turning arm 49 is also turned in conjunction with the slide operation of the drive lever 52 via a coupling mechanism (not shown).

  The disc transport mechanism 34 is configured so that the first rotating arm 35, the second rotating arm 36, the third rotating arm 46, and the fourth rotating arm 49 cooperate with each other while the optical disc 2 is moved to the disc. A loading operation to pull the optical disk 2 into the housing 3 from the insertion / removal opening, a centering operation to position the optical disk 2 at the disk mounting position, and an ejection operation to eject the optical disk 2 from the disk insertion / removal opening 19 to the outside of the housing 3 are performed. .

  As shown in FIG. 4, the disk drive apparatus 1 includes a base lifting mechanism 55 that moves the base 27 up and down in conjunction with the slide of the drive lever 52 described above. The base elevating mechanism 55 raises the base 27 and lowers the chucking position where the optical disk 2 positioned at the disk mounting position is mounted on the turntable 23a of the disk mounting section 23, and the base 27 is moved downward. A chucking release position for detaching the optical disk 2 from the turntable 23a, and an intermediate position where the base 27 is positioned between the chucking position and the chucking release position and a signal is recorded or reproduced on the optical disk 2. The base 27 is moved up and down.

  Specifically, a cam groove (not shown) corresponding to the chucking position of the optical disc 2, the chucking release position of the optical disc 2, and the intermediate position is provided on the side surface of the drive lever 52 facing the base 27 in the longitudinal direction. It is formed over.

  A cam lever 56 is disposed on the bottom surface of the bottom case 4 along the side surface on the back side of the base 27. The cam lever 56 is formed of a long flat plate member, and is substantially orthogonal to the sliding direction of the drive lever 52 in conjunction with the slide of the drive lever 52 in the front-rear direction of the arrow X1 and arrow X2 in FIG. It is slid in the direction. A cam piece 57 that is bent upward from an edge portion facing the base 27 is provided at an intermediate portion of the cam lever 56. The cam piece 57 has a chucking position where the optical disk 2 is chucked on the turntable 23a, a chucking release position where the optical disk 2 is detached from the turntable 23a, and an intermediate position where the optical disk 2 is mounted on the turntable 23a and performs recording / reproduction. A corresponding cam groove (not shown) is formed in the longitudinal direction.

  A bent piece 58 is formed on the bottom surface of the bottom case 4 along the side surface on the back side of the base 27. A vertical groove (not shown) for raising and lowering the base 27 is formed in the bent piece 58 over the vertical direction.

  On the other hand, as shown in FIG. 5, the base 27 is positioned on the side of the disk mounting portion 23 on the side surface facing the drive lever 52 and is engaged with a cam groove formed on the side surface of the drive lever 52. The first support shaft 59 to be supported and the side of the disc mounting portion 23 facing the cam lever 56 are located on the side of the disk mounting portion 23, and are engaged and supported by the cam groove of the cam piece 57 and the vertical groove of the bent piece 58. The second support shaft 60 is located on the front side of the side opposite to the side facing the drive lever 52 and is rotatably supported by a shaft hole 61 provided on the other side of the bottom case 4. The third support shaft 62 is positioned on the front side of the side opposite to the side facing the cam lever 56, and is attached to the bottom of the bottom case 4 via an insulator 63 made of a viscoelastic member such as rubber. A support portion 65 supported by a screw 64; That.

  In the base lifting mechanism 55, the first support shaft 59 slides in the cam groove of the drive lever 52 in conjunction with the slide of the drive lever 52 and the cam lever 56, and the second support shaft 60 is the cam of the cam lever 56. By sliding in the vertical groove of the groove and the bent piece 58, a chucking position where the disk mounting portion 23 side of the base 27 chucks the optical disk 2 to the turntable 23 a with respect to the front surface side of the housing 3, and the turn It is moved up and down between a chucking release position separated from the table 23a and an intermediate position where the optical disk 2 is mounted on the turntable 23a and recording / reproduction is performed.

  As shown in FIG. 4, when the base lifting mechanism 55 lowers the base 27, the optical disk 2 mounted on the turntable 23 a of the disk mounting portion 23 is placed on the bottom surface of the bottom case 4. A push-up pin 66 that constitutes a chucking release mechanism for disengaging from 23a is provided. The push-up pin 66 is located in the vicinity of the disc mounting portion 23 of the base unit 22, specifically, on the back side of the base 27 closest to the disc mounting portion 23, and upward from the bottom surface portion of the bottom case 4. Protrusively provided.

  Next, a specific operation of the disk drive device 1 configured as described above will be described.

  In this disk drive device 1, as shown in FIG. 6, in the initial state before the optical disk 2 is inserted, the first rotating arm 35 and the second rotating arm 36 have predetermined tip portions. It is held open at a spread angle. The third rotating arm 46 is held in a state where the distal end portion is located outside the proximal end portion and the distal end portion is located on the front side of the proximal end portion. The fourth rotating arm 49 is held in a state in which the distal end portion is located on the inner side of the proximal end portion and the distal end portion is located on the front side of the proximal end portion. The drive lever 52 is located on the front side of the bottom case 4.

  In this disk drive device 1, a loading operation for pulling these optical disks 2 A and 2 B to the disk mounting position is possible even when any of the optical disks 2 A and 2 B having different outer diameters is inserted from the disk insertion / removal port 19 of the housing 3. It can be carried out.

  Specifically, when a large-diameter optical disk 2A is inserted from the disk insertion / removal port 19 of the housing 3, first, as shown in FIG. 7, the optical disk inserted into the housing 3 from the disk insertion / removal port 19 The back side of the outer peripheral portion of 2A is in contact with the first front-side contact member 38 of the first rotating arm 35 and the second front-side contact member 40 of the second rotating arm 36. .

  Next, as shown in FIG. 8, when the optical disk 2A is further pushed into the housing 3 from the disk insertion / removal port 19 from this state, the first rotating arm 35 and the second rotating arm 36 are moved to the first position. The outer peripheral portion of the large-diameter optical disc 2A is sandwiched between the first front-side contact member 38 and the second front-side contact member 40. At this time, in a state where the first front-side contact member 38 and the second front-side contact member 40 are in contact with the back side of the outer peripheral portion of the optical disc 2A, Are turned away from each other against the urging force of the torsion coil spring, that is, in the directions indicated by arrows a2 and b2 in FIG.

  When the first rotating arm 35 and the second rotating arm 36 are rotated by a predetermined amount in a direction away from each other, a detection switch for detecting an initial position provided on the circuit board is pressed. Thus, the drive mechanism 52 starts to slide the drive lever 52 toward the back side inside the apparatus. As a result, the third rotating arm 46 is rotated in the direction of the arrow c1 in FIG. Further, the third rotating arm 46 is brought into a state in which the third contact member 48 is in contact with the front surface side of the outer peripheral portion of the large-diameter optical disc 2A, whereby the front side of the outer peripheral portion of the optical disc 2A. The optical disk 2A is pulled into the housing 3 while pressing.

  As shown in FIG. 9, until the center hole 2a of the large-diameter optical disc 2A is positioned on the back side with respect to the straight line connecting the first front-side contact member 38 and the second front-side contact member 40. When pulled into the housing 3, the first front-side contact member 38 and the second front-side contact member 40 turn from the back side to the front side along the outer periphery of the optical disc 2A. Then, in this state, with the first front-side contact member 38 and the second front-side contact member 40 in contact with the front side of the outer peripheral portion of the optical disc 2A, The two rotating arms 36 are biased by the torsion coil springs and are rotated in directions close to each other, that is, in the directions of arrows a1 and b1 in FIG. Thereby, the first rotating arm 35 and the second rotating arm 36 press the large-diameter optical disk 2A to the disk mounting position shown in FIG. 10 while pressing the front side of the outer peripheral portion of the large-diameter optical disk 2A. Will be drawn in.

  Further, the fourth rotating arm 49 is pressed in a state in which the fourth contact member 50 is in contact with the back side of the outer peripheral portion of the large-diameter optical disc 2A, so that the fourth rotation arm 49 is moved in the direction of the arrow d1 in FIG. It is rotated. Then, when the large-diameter optical disk 2A is pulled in at the disk mounting position shown in FIG. 10, the fourth rotation arm 49 is brought into contact with the regulating piece 51 of the second rotation arm 36 and the rotation thereof. Is in a regulated state.

  On the other hand, when the small-diameter optical disk 2B is inserted from the disk insertion / removal opening 19 of the housing 3, first, as shown in FIG. 16, the small-diameter optical disk 2B inserted into the housing 3 from the disk insertion / removal opening 19 is performed. The back surface side of the outer peripheral portion of the first rotating arm 35 is in contact with the first front surface contact member 38 of the first rotating arm 35 and the second front surface contact member 40 of the second rotating arm 36.

  Next, as shown in FIG. 17, when the smaller-diameter optical disk 2B is pushed into the housing 3 from the disk insertion / removal port 19 from this state, the first rotating arm 35, the second rotating arm 36, Sandwiches the outer periphery of the small-diameter optical disc 2B between the first front-side contact member 38 and the second front-side contact member 40. At this time, in a state where the first front-side contact member 38 and the second front-side contact member 40 are in contact with the back side of the outer peripheral portion of the optical disc 2B, Are rotated away from each other against the urging force of the torsion coil spring, that is, in the directions indicated by arrows a2 and b2 in FIG.

  When the first rotation arm 35 and the second rotation arm 36 are rotated by a predetermined amount in a direction away from each other, the detection switch provided on the circuit board is pressed, thereby causing the drive mechanism to The drive lever 52 starts to slide to the back side.

  As a result, the third rotation arm 46 is rotated in the direction of the arrow c1 in FIG. Further, the third rotating arm 46 is in a state in which the third contact member 48 is in contact with the front surface side of the outer peripheral portion of the small-diameter optical disc 2B, so that the front surface side of the outer peripheral portion of the optical disc 2B is moved. The optical disk 2B is pulled into the housing 3 from the disk insertion / removal port 19 while being pressed.

  Then, as shown in FIG. 18, until the center hole 2a of the small-diameter optical disc 2B is located on the back side of the straight line connecting the first front-side contact member 38 and the second front-side contact member 40, When the optical disc 2B is drawn into the housing 3, the first front-side contact member 38 and the second front-side contact member 40 wrap around from the back side to the front side along the outer periphery of the optical disc 2B. . Then, in a state where the first front side contact member 38 and the second front side contact member 40 are in contact with the front side of the outer peripheral portion of the optical disc 2B, The rotating arm 36 is biased by the torsion coil spring and is rotated in the directions close to each other, that is, in the directions of the arrows a1 and b1 in FIG.

  Accordingly, the first rotating arm 35 and the second rotating arm 36 pull the optical disk 2B to the disk mounting position shown in FIG. 19 while pressing the front side of the outer peripheral portion of the small-diameter optical disk 2B. Become.

  Further, the fourth rotating arm 49 is rotated in the direction of the arrow d1 in FIG. 18 by being pressed while the fourth contact member 50 is in contact with the back side of the outer peripheral portion of the small-diameter optical disc 2B. Moved. Then, when the small-diameter optical disk 2B is pulled in at the disk mounting position shown in FIG. 19, the fourth rotation arm 49 is brought into contact with the regulating piece 51 of the second rotation arm 36, and the rotation is performed. It becomes a regulated state.

  In this disk drive device 1, as shown in FIGS. 10 and 19, the first rotating arm 35 and the second rotating arm 36 draw the optical disks 2A and 2B having different outer diameters to the disk mounting position. In this case, the optical discs 2A and 2B are sandwiched inside the first front contact member 38, the first rear contact member 39, the second front contact member 40, and the fourth contact member 50. Thus, a centering operation for positioning the optical disks 2A and 2B having different outer diameters at the disk mounting position is performed. That is, the center holes 2a of the optical disks 2A and 2B having different outer diameters and the engaging protrusions 28a of the turntable 23a are made to coincide with each other in the direction orthogonal to the main surface of the disk 2.

  Next, in the disk drive device 1, after the above-described centering operation of the optical disk 2, the base lifting mechanism 55 raises the base 27, so that the optical disk 2 positioned at the disk mounting position is moved to the turntable of the disk mounting unit 23. A chucking operation to be attached to 23a is performed.

  Specifically, when the base 27 is raised from the chucking release position shown in FIG. 26 to the chucking position shown in FIG. 27 by the base elevating mechanism 55, it engages with the center hole 2a of the optical disk 2 positioned at the disk mounting position. While the portion 28a enters, the periphery of the center hole 2a of the optical disc 2 is pressed against the contact projection 7 of the top plate portion 5a, so that the engagement projection 28a is engaged with the center hole 2a of the optical disc 2, and The optical disk 2 is held on the turntable 23a in a state where the plurality of pressing support pieces 28b are engaged with the periphery of the center hole 2a of the optical disk 2. Then, with the optical disk 2 being held on the turntable 23a, the base 27 is lowered to the intermediate position shown in FIG.

  In the disk drive device 1, after the above-described chucking operation, the first rotating arm 35 is interlocked with the sliding of the drive lever 52 toward the inner back side of the housing 3 as described later. And the second rotating arm 36 is slightly rotated in the direction in which they are separated from each other, that is, in the directions of the arrows a2 and b2 shown in FIGS. At this time, the fourth rotating arm 49 is rotated integrally with the second rotating arm 36 while being in contact with the regulating piece 51. Further, the third rotation arm 46 is slightly rotated in the direction of the arrow c2 shown in FIGS. 11 and 20 in conjunction with the sliding of the drive lever 52 toward the inner back side of the housing 3. . Thereby, from the outer periphery of the optical disks 2A and 2B held on the turntable 23a, the first front-side contact member 38, the first back-side contact member 39, the second front-side contact member 40, the first The third contact member 48 and the fourth contact member 50 are separated from each other.

  When a recording or reproduction command signal is input from the personal computer 1000 from the state shown in FIGS. 11, 20, and 28, the disk drive device 1 transmits an information signal to the optical disk 2 based on the command. Recording or reproduction is performed. Specifically, the spindle motor 24a rotates the optical disk 2 integrally with the turntable 23a, and the optical pickup 25 is moved from the outer peripheral side to the inner peripheral side by the pickup feeding mechanism 26, and focus servo control and tracking servo control are performed. As a result, the TOC data recorded in the lead-in area of the optical disc 2 is read. Thereafter, when the information signal is recorded, the optical pickup 25 moves to a predetermined address in the program area of the optical disc 2 based on the read TOC data. When reproducing the information signal, the optical pickup 25 moves to the address in the program area where the designated data is recorded. The optical pickup 25 performs an information signal writing or reading operation on a desired recording track of the optical disc 2.

  In this disc drive apparatus 1, when an eject button 21 provided on the front panel 20 is operated or an eject command signal is input from the personal computer 1000 on which the disc drive apparatus 1 is mounted, the disc drive apparatus 1 is based on this command signal. First, sliding of the drive lever 52 to the front side is started by the drive mechanism.

  Then, in conjunction with the slide toward the front side of the drive lever 52, the direction in which the first rotating arm 35 and the second rotating arm 36 approach each other, that is, the direction of the arrow a1 shown in FIGS. It is slightly rotated in the b1 direction. At this time, the fourth rotating arm 49 is rotated integrally with the second rotating arm 36 while being in contact with the regulating piece 51. Further, the third rotation arm 46 is slightly rotated in the direction of the arrow c1 shown in FIGS. 12 and 21 in conjunction with the slide of the drive lever 52 toward the front side of the housing 3.

  As a result, the first front-side contact member 38, the first back-side contact member 39, the second front-side contact member 40, the first front-side contact member 40, the outer periphery of the optical discs 2A and 2B held by the turntable 23a. The third contact member 48 and the fourth contact member 50 are in contact with each other. In the case of the small-diameter optical disc 2B shown in FIG. 21, the fourth contact member 50 is in a state of being separated from the outer peripheral portion of the optical disc 2B.

  Next, in the disk drive device 1, the base lifting mechanism 55 lowers the base 27 to the chucking release position, thereby performing a chucking release operation for removing the optical disk 2 from the turntable 23 a of the disk mounting portion 23.

  Specifically, when the base 27 is lowered to the chucking release position, the tip of the push-up pin 66 comes into contact with the non-signal recording area on the inner circumference side of the optical disc 2 mounted on the turntable 23a of the disc mounting portion 23. As a result, the optical disk 2 is detached from the turntable 23a while pushing up the optical disk 2.

  Next, in the disk drive device 1, an ejection operation is performed to eject the optical disks 2 </ b> A and 2 </ b> B in the disk mounting unit 23 from the disk insertion / removal port 19 to the outside of the housing 3.

  Specifically, when ejecting the large-diameter optical disk 2A from the disk insertion / removal port 19 of the housing 3, first, as shown in FIG. The rotating arm 49 is rotated in the direction of arrow d2 in FIG. Further, the fourth rotating arm 49 is in a state in which the fourth contact member 50 is in contact with the back side of the outer peripheral portion of the large-diameter optical disc 2A, so that the back side of the outer peripheral portion of the optical disc 2A. The optical disk 2A is pushed out of the housing 3 while pressing.

  Then, as shown in FIG. 14, until the center hole 2a of the large-diameter optical disc 2A is positioned on the front side of the straight line connecting the first front-side contact member 38 and the second front-side contact member 40. When the optical disc 2A is ejected to the outside of the housing 3, the first front-side contact member 38 and the second front-side contact member 40 are on the front side along the outer peripheral portion of the large-diameter optical disc 2A. From the back to the back. Then, this time, with the first front-side contact member 38 and the second front-side contact member 40 being in contact with the back side of the outer peripheral portion of the optical disc 2A, The two rotating arms 36 are biased by the torsion coil springs and rotated in directions close to each other, that is, in the directions of the arrows a1 and b1 shown in FIG.

  Further, the third rotating arm 46 rotates in the direction of the arrow c2 shown in FIG. 14 by being pressed while the third contact member 48 is in contact with the outer peripheral portion of the large-diameter optical disc 2A. Moved.

  The first rotating arm 35 and the second rotating arm 36 press the optical disc 2A at the disc insertion / removal position shown in FIG. The center hole 2a of the optical disk 2A having a diameter is pushed out from the disk insertion / removal opening 19 to a position where it is exposed to the outside of the housing 3.

  On the other hand, when the small-diameter optical disk 2B is ejected from the disk insertion / removal port 19 of the housing 3, first, the fourth rotating arm 49 is linked with the slide of the drive lever 52 to the front side in FIG. It is rotated in the d2 direction. Further, the fourth rotating arm 49 is in a state in which the fourth contact member 50 is in contact with the back side of the outer peripheral portion of the small-diameter optical disc 2B, so that the back side of the outer peripheral portion of the optical disc 2B is moved. The optical disk 2B is pushed out of the housing 3 while being pressed.

  Then, as shown in FIG. 23, until the center hole 2a of the small-diameter optical disc 2B is located on the front side of the straight line connecting the first front-side contact member 38 and the second front-side contact member 40, When the small-diameter optical disc 2B is ejected to the outside of the housing 3, the first front-side abutting member 38 and the second front-side abutting member 40 are located on the front side along the outer peripheral portion of the small-diameter optical disc 2B. From the back to the back. Then, the first rotating arm 35 is now in a state in which the first front-side contact member 38 and the second front-side contact member 40 are in contact with the back side of the outer peripheral portion of the small-diameter optical disc 2B. And the second rotating arm 36 are biased by the torsion coil springs and rotated in directions close to each other, that is, in the directions of the arrows a1 and b1 in FIG.

  Further, the third rotating arm 46 is rotated in the direction of the arrow c2 in FIG. 23 by being pressed while the third contact member 48 is in contact with the outer peripheral portion of the small-diameter optical disc 2B. .

  The first rotating arm 35 and the second rotating arm 36 push the optical disc 2B to the disc insertion / removal position shown in FIG. 24 while pressing the back side of the outer peripheral portion of the small-diameter optical disc 2B. Become.

  In the case of the small-diameter optical disc 2B, as shown in FIG. 25, the first rotating arm 35 and the second rotating arm 36 are in the directions close to each other, that is, the arrow a1 direction and the arrow b1 in FIG. By further rotating in the direction, the optical disc 2B can be pushed out to a position where the central hole 2a of the optical disc 2B is exposed from the disc insertion / removal opening 19 to the outside of the housing 3.

  As described above, in the disk drive device 1, when the optical disks 2A and 2B having different outer diameters are pulled to the disk mounting position by the first rotating arm 35 and the second rotating arm 36, the first rotating arm 35 and the second rotating arm 36 are used. By sandwiching the optical disks 2A and 2B inside the front contact member 38, the first back contact member 39, the second front contact member 40, and the fourth contact member 50, the outer diameters of these outer diameters can be reduced. It is possible to perform a centering operation for positioning different optical disks 2A and 2B at the disk mounting position.

  Here, as schematically shown in FIG. 29, the first rotating arm 35 and the second rotating arm 36 are disposed at positions that are substantially symmetrical with the turntable 23a of the disk mounting portion 23 interposed therebetween. It can be rotated in a direction close to or away from each other around a rotation center O located on the back side of the turntable 23a.

  Of the four contact members 38, 39, 40, and 50 that are in contact with the outer peripheral portions of the optical disks 2 </ b> A and 2 </ b> B having different outer diameters, they are positioned on the front side of the turntable 23 a of the first rotating arm 35. The first front-side abutting member 38 and the first back-side abutting member 39 located on the back side of the turntable 23 a of the first rotating arm 35 and the turntable of the second rotating arm 36. The second front-side contact member 40 located on the front side of 23a and the fourth contact member 50 located on the back side of the turntable 23a of the second rotating arm 36 are the same as those of the turntable 23a. The positional relationship is substantially symmetric with respect to the center line along the insertion direction of the optical disc 2 passing through the center portion and the rotation center O.

  By the way, when centering a large-diameter optical disk 2A having a diameter of 12 cm and centering a small-diameter optical disk having a diameter of 8 cm, the first rotation arm 35 and the second rotation center about the rotation center O are used. An angle difference is produced by Δθ in the rotation range of the rotation arm.

  Therefore, if the arrangement of the four abutting members 38, 39, 40, 50 is set in advance in consideration of this angle difference Δθ, the four abutting members 38, 39 can be used in the centering operation described above. , 40, 50 can be brought into contact with the outer peripheral portions of the optical disks 2A, 2B having different outer diameters.

  Specifically, an arc centered on the rotation center O passing through the front side of the turntable 23a is defined as S1, and the arc S1 and the outer periphery of the large-diameter optical disc 2A and the small-diameter optical disc 2B at the disc mounting position are defined as S1. The contact points are A and B, respectively, and an arc centering on the rotation center O passing through the back side of the turntable 23a is S2 (S1> S2). The arc S2 and the large-diameter optical disc 2A at the disc mounting position Two arcs S1 and S2 satisfying the relationship of angle AOB = A′OB ′ = Δθ when the contact points between the outer periphery and the outer periphery of the small-diameter optical disc 2B are A ′ and B ′, respectively, have a predetermined radius. It exists over the range. And it is designed so that the four contact members 38, 39, 40, 50 are arranged at positions satisfying such a relationship.

  In the vicinity of arc S1, Δθ decreases as the radius decreases, and Δθ increases as the radius increases. Then, the design limit is a point slightly beyond the arc S1, that is, a place where contact with the outer peripheral portion of the small-diameter optical disc 2B is impossible. On the other hand, in the vicinity of the arc S2, Δθ increases as the radius decreases, and Δθ decreases as the radius increases. Δθ has a minimum value, which is a design limit.

  In actual design, the most preferable radii and angle differences Δθ of the arcs S1 and S2 are set within the range of the degree of freedom of design. These can be easily obtained while drawing using CAD software or the like. Is possible.

  As described above, in the disk drive device 1, the first rotating arm 35 and the second rotating arm 36 have the first front-side contact member 38, the first back-side contact member 39, the first When the optical disks 2A and 2B having different outer diameters are sandwiched inside the front surface side contact member 40 and the fourth contact member 50, respectively, the central portions (center holes) of the optical disks 2A and 2B having different outer diameters are sandwiched. 2a) and the central portion of the disc mounting portion 23 (with the engaging projection 28a of the turntable 23a) can be made to coincide with each other in the direction orthogonal to the main surface of the disc 2. That is, it is possible to appropriately and stably perform the centering operation for positioning the optical disks 2A and 2B having different outer diameters at the disk mounting position.

  Further, in this disk drive apparatus 1, the first rotating arm 35 and the second rotating arm 36 pull the large-diameter optical disk 2A and the small-diameter optical disk having different outer diameters to the disk mounting position at the same time as the centering operation. Is done. That is, the centering operation by the first rotating arm 35 and the second rotating arm 36 also serves as an operation of further pulling the optical disk 2 drawn by the third rotating arm 46 to the disk mounting position.

  Therefore, in this disk drive apparatus 1, regardless of the difference in the outer diameter of the optical disks 2A and 2B inserted from the disk insertion / removal port 19, the loading operation for pulling the optical disks 2A and 2B having different outer diameters to the disk mounting position is performed appropriately. It is possible to carry out stably.

  Specifically, the radius of the large-diameter optical disk 2A is 6 cm, whereas the radius of the small-diameter optical disk 2B is 4 cm. Therefore, the small-diameter optical disk 2B has a larger diameter than the optical disk 2A. Further, it is necessary to push the disc insertion / removal opening 19 into the inside of the housing 3 by an extra 2 cm, and the distance to the disc mounting position is not equal. That is, the small-diameter optical disc 2B has a stroke shorter by about 2 cm from the disc insertion / removal opening 19 to the disc mounting position than the large-diameter optical disc 2A.

  Therefore, in the disk drive device 1 according to the present invention, in order to absorb the stroke difference due to the difference in outer diameter between the large-diameter optical disk 2A and the small-diameter optical disk 2B, first, the third rotating arm 46 is used. The small-diameter optical disk 2B is placed on the housing 3 until the center hole 2a of the small-diameter optical disk 2B is positioned on the back side of the straight line connecting the first front-side contact member 38 and the second front-side contact member 40. It is pushed inside. As an actual margin, if the small-diameter optical disk 2A is pushed in by about 10 mm more than the large-diameter optical disk 2A, the subsequent pulling operation becomes more stable.

  Next, the first rotating arm 35 and the second rotating arm 36 are urged by the torsion coil springs and rotated in directions close to each other, whereby the first front contact member 38 and the second rotating arm 36 are rotated. The small-diameter optical disc 2B sandwiched between the two front-side contact members 40 is drawn to the disc mounting position.

  At this time, the stroke difference due to the difference in outer diameter between the large-diameter optical disc 2A and the small-diameter optical disc 2B is absorbed according to the degree of closing of the first rotary arm 35 and the second rotary arm 36. It will be. As a result, the optical disks 2A and 2B having different outer diameters can be reliably pulled to the disk mounting position.

  In the disk drive device 1 according to the present invention, the third abutting member 48 of the third rotating arm 46 also contacts the outer peripheral portion of the large-diameter optical disk 2A during the centering operation of the large-diameter optical disk 2A. It has a configuration that allows contact. That is, a total of five contact members 38, 39, 40, 48, and 50 are brought into contact with the outer peripheral portion of the large-diameter optical disc 2A.

  Here, the abutting portion that abuts on the outer peripheral portion of the optical disc 2 during the centering operation is the front side of the turntable 23 a of the first rotating arm 35 and the turntable of the first rotating arm 35. At least 3 surrounding the turntable 23a among the back side from the turntable 23a, the front side from the turntable 23a of the second turning arm 36, and the backside from the turntable 23a of the second turning arm 36. A total of 3 or more are required for each location.

  Therefore, the disk drive device 1 according to the present invention is not necessarily limited to the above-described configuration as long as the above-described conditions are satisfied. For example, the third contact from the outer peripheral portion of the large-diameter optical disk 2A during centering. It is also possible to adopt a configuration in which the member 48 is separated or a configuration in which three contact points are provided during centering.

  Further, in the disk drive device 1 according to the present invention, for example, as shown in FIG. 30, the shapes of the contact members 38, 39, 40, and 50 that are in contact with the outer peripheral portion of the optical disk 2 during centering are substantially arc-shaped. It is also possible. Note that the radius of this arc is preferably smaller than the radius of the large-diameter optical disc 2A.

  In this case, the starting position of the loading operation by the first rotating arm 35 and the second rotating arm 36 can be set to the front, and the amount of the optical disk 2 discharged from the optical disk insertion / removal port 19 after the ejection operation is completed. Can be increased.

  Also, in this case, as schematically shown in FIG. 31, when centering the large-diameter optical disc 2A, the back side of the first back-side contact member 39 and the fourth contact member 50 having a substantially arc shape. The outer peripheral portion of the large-diameter optical disc 2A comes into contact with (A1 point shown in FIG. 31). On the other hand, when centering the small-diameter disc 2B, the small-diameter optical disc is placed on the front side (point B1 shown in FIG. 31) of the first back-side abutting member 39 and the fourth abutting member 50, which are substantially arc-shaped. The outer peripheral part of 2B will contact | abut.

  Therefore, A1OB1 = Δθ becomes smaller as the arc portions of the first back-side contact member 39 and the fourth contact member 50 become longer. Further, when the angle difference Δθ is decreased, the rotation range of the first rotation arm 35 and the second rotation arm 36 is narrowed. As a result, for example, there are obtained merits such as a reduction in dead space due to a decrease in the passing portions of the rotating arms 35 and 36 and a reduction in mechanical stress due to a decrease in the driving stroke of the driving lever 52 that drives the rotating arms 35 and 36. be able to.

  Thus, since the setting range of the angle difference Δθ is widened by making the shapes of the first back surface side contact member 39 and the fourth contact member 50 substantially circular arc shapes, the degree of freedom in design is further increased. Is possible.

  Further, in the disc drive apparatus 1 according to the present invention, as shown in FIG. 32, a plurality of abutting members may be arranged at each abutting location that abuts on the outer peripheral portion of the optical disc 2 during centering. . In this example, instead of the above-described first back-side abutting member 39, the abutting member dedicated to pulling out and ejecting the optical disc 2 is located on the back side of the turntable 23a of the first rotating arm 35. 70a and a centering contact member 70b are provided.

  The fourth abutting member 50 may be divided into a plurality of abutting members. The fourth abutting member 50 is configured so that the outer periphery of the optical disc 2 is loaded during the aforementioned loading operation and ejecting operation. In order to prevent the discontinuous operation of the fourth rotating arm 49 by the divided contact members, only the arc shape that is a continuous shape or the tip portion is separated, It is desirable to comprise.

  Further, as the ejection assisting means for assisting the ejecting operation of the optical disk 2 described above, as shown in FIGS. 30 and 32, it rotates in a plane parallel to the main surface of the optical disk 2 inserted from the disk insertion / removal port 19. It is also possible to adopt a configuration in which a possible fifth rotation member 71 is rotatably attached to the first rotation arm 35 via a support shaft 71a. Further, the fifth rotating member 71 is provided with a fifth contact member 71c that protrudes upward from the rear surface of the outer peripheral portion of the optical disk 2 inserted from the disk insertion / removal port 19. . As a result, the above-described ejection operation can be performed more reliably.

  Further, in the disk drive device 1 according to the present invention, the first rotating arm 35 and the second rotating arm 36 are inserted from the main surface of the top plate portion 5 a facing the disk mounting portion 23 and the disk insertion / removal port 19. A rotation operation is performed between the optical disk 2 and the main surface of the optical disk 2 that has been made.

  For this reason, the above-described loading operation, centering operation, and ejecting operation of the optical disc 2 can be performed appropriately and stably without being affected by the clearance between the optical disc 2 inserted from the disc insertion opening 19 and the base 27. Is possible.

  In particular, among the optical disks 2A and 2B having different outer diameters, even when the chucking operation for raising the base 27 and mounting the small-diameter optical disk 2B on the turntable 23A is performed after the centering operation of the small-diameter optical disk 2B, It is possible to avoid a collision between the first and second rotating arms 35 and 36 and the base 27.

  Therefore, in the disk drive device 1 according to the present invention, the influence of the clearance between the optical disk 2 and the base 27 that becomes narrow when chucking the turntable 23a while allowing loading of the optical disk 2 having different outer diameters. The entire apparatus can be further reduced in size, weight, and thickness without being subjected to the above.

  Further, in the disk drive device 1 according to the present invention, the distal end portion of the first rotating arm 35 and the distal end portion of the second rotating arm 36 are formed in the guide groove 9 of the guide member 8 provided in the top plate portion 5a. It is slidably supported in the engaged state. As a result, the first rotating arm 35 and the second rotation between the main surface of the top plate portion 5a facing the disc mounting portion 23 and the main surface of the optical disc 2 inserted from the disc insertion / removal port 19 are performed. The moving arm 36 can be stably rotated.

  Furthermore, the casing 3 attaches such a guide member 8 to the front side of the top plate portion 5a, so that the guide member 8 functions as a reinforcing rib. As a result, the rigidity of the top cover 5 is increased. Is possible. As a result, the rigidity of the top cover 5 in the vicinity of the disk insertion / removal opening 19 is prevented from being lowered, and the operation reliability when the optical disk 2 is mounted on the turntable 23a of the disk mounting portion 23 by raising the base 27 is improved. Is possible.

  As described above, the disk drive device 1 according to the present invention can selectively load the optical disks 2A and 2B having different outer diameters while having a simple mechanism, and loads the optical disk 2B having a small diameter. It is not necessary to use an adapter for making the same size as the large-diameter optical disc 2A, and the operability can be further improved. In addition, operation reliability is high and cost reduction is easy.

  In the disk drive device 1 according to the present invention, the number of parts can be greatly reduced compared to the conventional slot-in type disk drive device in which the optical disks 2A and 2B having different outer diameters can be selectively mounted. It is possible to further reduce the size, weight, and thickness of the entire apparatus. In particular, as an ultra-thin slot-in type disk drive device mounted on a notebook personal computer 1000 or the like, the thickness can be reduced to 12.7 mm or 9.5 mm.

  Next, a specific configuration for controlling the drive of the disk drive device 1 according to the present invention will be described. In the following description, members that perform functions equivalent to those of the disk drive device 1 described above will be described with common reference numerals.

  Of the first to fourth rotating arms 35, 36, 46, and 49 constituting the disk transport mechanism 34, the first rotating arm 35 and the second rotating arm 36 are as shown in FIG. A pair of front and rear rotating rollers 73a and 73b are rotatably attached to the first front surface side contact member 38 and the second front surface side contact member 40, respectively. Of the pair of rotating rollers 73a and 73b, the rotating roller 73a located on the front side of the housing 3 is a portion that comes into contact with the outer peripheral portion of the optical disc 2 during the loading operation and the ejecting operation described above. In addition, the rotation roller 73b located on the back side of the housing 3 is a portion that comes into contact with the outer peripheral portion of the optical disc 2 during the centering operation described above. As described above, by providing the pair of rotating rollers 73a and 73b with different functions, the large-diameter optical disk 2A and the small-diameter optical disk 2B formed by the first rotating arm 35 and the second rotating arm 36 described above are used. The loading operation, centering operation, and ejecting operation can be performed reliably and stably.

  In the interlocking mechanism 41, as shown in FIGS. 33, 34 and 35, the first rotating arm 35 and the second rotating arm 36 described above are optical disks 2A and 2B having different outer diameters. It is necessary to perform a rotation operation corresponding to each. For this reason, the cam piece 57 bent upward from the middle part of the cam lever 56 is further bent in a substantially U shape in the horizontal direction. The horizontal plane portion 57a of the cam piece 57 corresponds to the small-diameter optical disc 2B by cutting out the first cam portion 74a corresponding to the large-diameter optical disc 2A and the front side from the first cam portion 74a. The second cam portion 74b is formed.

  In the interlocking mechanism 41, the first rotating arm 35 and the second rotation arm 35 are inserted into the case 3 when the large-diameter optical disk 2A is inserted from the disk insertion / removal port 19 of the housing 3 and when the small-diameter optical disk 2B is inserted. The engagement state of the second support shaft 44 with the first cam portion 74a and the second cam portion 74b is switched by the difference in opening angle with the rotating arm 36.

  Specifically, when the large-diameter optical disc 2A is inserted, the second support shaft 44 engages with the first cam portion 74a, and guides in conjunction with the above-described sliding movement of the cam lever 56 in the left-right direction. Slide in the groove 45. As a result, the first turning arm 35 and the second turning arm 36 can be turned in a direction close to or away from each other in accordance with the outer diameter of the large-diameter optical disc 2A.

  On the other hand, when the small-diameter optical disk 2B is inserted, the second support shaft 44 engages with the second cam portion 74b, and moves in the guide groove 45 in conjunction with the sliding operation of the cam lever 56 in the left-right direction. Slide As a result, the first turning arm 35 and the second turning arm 36 can be rotated in a direction close to or away from each other in accordance with the outer diameter of the small-diameter optical disc 2B.

  Further, as shown in FIG. 33, the disk transport mechanism 34 is a first torsion coil spring as a biasing member that biases the first rotating arm 35 and the second rotating arm 36 toward each other. 75. Although not shown in detail, the first torsion coil spring 75 has one end locked to the base end of the first rotating arm 35 with the coil portion inserted through the first support shaft 37 and the other end. The first rotation arm 35 and the second rotation arm arm 36 are urged in the direction approaching each other by locking the portion to the second rotation arm 36.

  Further, as shown in FIGS. 34 and 57, the disk transport mechanism 34 is in a non-biased state in which the first rotary arm 35 and the second rotary arm 36 described above are biased toward each other. As an urging switching mechanism capable of switching between the urging states, a pressing lever 76 that presses the second rotating arm 36, and the pressing lever 76 is used as the first rotating arm 35 and the second rotating arm 36. And a second torsion coil spring 77 that is an urging member for urging in the direction in which they are close to each other.

  The pressing lever 76 has an abutting pin 76a abutted against the second rotating arm 36 at one end thereof, and an upper surface portion of the driving lever 52 shown in FIGS. 37 (a) to 37 (d) at the other end. And a cam pin 76b to be engaged with the cam groove 78 formed in the inner wall. The pressing lever 76 rotates between a contact position where the contact pin 76 a contacts the second rotating arm 36 and a retracted position where the contact pin 76 b separates from the second rotating arm 36. It is pivotally supported on the chassis 11 in a movable state.

  As shown in FIG. 34, the second torsion coil spring 77 is engaged with the chassis 11 while the coil portion is supported by the chassis 11, and the other end is engaged with the pressing lever 76. As a result, the contact pin 76a of the pressing lever 76 is urged in a direction to contact the second rotating arm 36.

  In the disk transport mechanism 34, the pressing lever 76 presses the second rotating arm 36, thereby biasing the first rotating arm 35 and the second rotating arm 36 described above toward each other. In this state, the drive lever 52 slides in the cam groove 78 of the drive lever 52 while the drive lever 52 slides in the cam groove 78 of the drive lever 52 in conjunction with the slide toward the back side in the direction of arrow X2 in FIG. When the casing 3 is slid to the end on the back side, it is switched to the non-biased state by rotating to the retracted position against the bias of the second torsion coil spring 77.

  As shown in FIGS. 33 and 34, the third rotating arm 46 is biased by a torsion coil spring 79 that is a biasing member disposed on the wing portion 4a. One end of the torsion coil spring 79 is locked to the locking pin 79a of the wing portion 4a, and the other end is locked to a locking pin 79b provided on the lower surface of the third rotating arm 46. The urging direction of the three rotation arms 46 can be switched between a direction in contact with the outer peripheral portion of the optical disc 2 and a direction away from the outer peripheral portion of the optical disc 2.

  Further, the third rotating arm 46 is engaged with a substantially L-shaped shaft hole 46a through which the support shaft 47 is inserted, and a cam groove 80 formed in the upper surface portion of the drive lever 52 as shown in FIG. And a cam pin 76b to be joined. As shown in FIGS. 56 (a) to 56 (f), the third rotating arm 46 rotates as the cam pin 46 b slides in the cam groove 80 in conjunction with the sliding operation of the drive lever 52. Is operated. Further, the rotation center of the third rotation arm 46 is switched depending on the position of the support shaft 47 in the shaft hole 46a.

  The fourth rotation arm 49 is rotated in conjunction with the slide operation of the drive lever 52 via the coupling mechanism 81 shown in FIG.

  Specifically, the connecting mechanism 81 includes a crank arm 82a that is rotatably supported via the first support shaft 37, and a connection that connects the crank arm 82a and the fourth rotating arm 49. A crank mechanism including an arm 82b is provided. The connecting arm 82b is formed with a long hole 83b through which a guide pin 83a provided on the second rotating arm 36 is inserted. In this crank mechanism, the crank arm 82 a rotates in conjunction with the rotation operation of the fourth rotation arm 49.

  Further, as shown in FIG. 35, the coupling mechanism 81 is meshed with the first gear 84 rotated through the crank arm 82 a described above and the first gear 84 on the bottom surface portion of the bottom case 4. A second gear 85 and a rotation operation member 87 in which a third gear 86 meshed with the second gear 85 is formed.

  This rotation operation member 87 is for rotating the fourth rotation arm 49 in conjunction with the slide operation of the drive lever 52, and engages with a slide member 92 of the drive lever 52 described later. It has an engaging pin 88 and a positioning pin 89 that contacts and fixes the end of the drive lever 52 on the back side during recording and reproduction.

  The rotation operation member 87 is urged to one side in the rotation direction (here, the clockwise direction in FIG. 35) by a tension coil spring 90 which is an urging member. One end of the tension coil spring 90 is locked to a locking pin 90 a provided on the bottom surface of the bottom case 4, and the other end is locked to a locking pin 90 b provided on the rotation operation member 87. Thus, the turning operation member 87 is biased to one side in the turning direction. The rotation operation member 87 is formed with a substantially arcuate slit 91 for releasing the locking pin 90a.

  On the other hand, a slide member 92 that is slidable in the front-rear direction with respect to the drive lever 52 is attached to the back side of the drive lever 52. The slide member 92 is biased to the front side by the first and second tension coil springs 93a and 93b, and the engaging pin 88 of the rotation operation member 87 is engaged with the end on the back side. Thus, the rotation operation member 87 is rotated in conjunction with the slide operation of the drive lever 52.

  The first and second tension coil springs 93a and 93b are respectively configured such that the front end of the housing 3 is locked to the drive lever 52 and the back end is locked to the slide member 92. The slide member 92 is urged toward the front side in the direction of arrow X1 in FIG. Among these, the 1st tension coil spring 93a is for operating the drive lever 52 and the slide member 92 integrally, and the spring force is about 200-300 gf. On the other hand, the second tension coil spring 93b is for protecting the mechanism when the optical disk 2 cannot be normally ejected, and its spring force is about 400 to 600 gf.

  When the fourth rotating arm 49 is rotated toward the inner back side of the housing 3 when loading the optical disc 2, the coupling mechanism 81 is connected to the first via the crank mechanism 82 described above. The gear 84 is rotated. Then, when the first gear 84, the second gear 85, and the third gear 86 are engaged with each other, the rotation operation member 87 resists the urging force of the tension coil spring 90, and the other side in the rotation direction (here, FIG. 35 (counterclockwise direction). Thereby, the drive lever 52 can be slid to the back side in the direction of arrow X2 in FIG. 35 in conjunction with the rotation of the fourth turning arm 49 to the back side.

  On the other hand, when the optical disk 2 is ejected, the drive lever 52 is slid to the front side in the direction of the arrow X1 in FIG. 35 (clockwise direction). Thereby, the fourth rotating arm 46 is rotated to the front side of the housing 3 through the crank mechanism 82 by meshing the third gear 86, the second gear 85, and the first gear 84. Can do.

  As shown in FIG. 33, the fifth rotating member 71 has a gear portion 71 b formed over a predetermined region of the outer peripheral portion thereof, and the gear portion 71 b is an internal tooth disposed on the chassis 11. By being engaged with the gear 94, the rotation operation is performed in conjunction with the rotation operation of the first rotation arm 35.

  In order to raise and lower the base unit 22 by the base elevating mechanism 55, the drive lever 52 is formed with a first cam groove 95 on the side surface facing the base 31, as shown in FIG. The first cam groove 95 includes a first horizontal surface portion 95a for positioning the base unit 22 in the chucking release position, a top surface portion 95b for positioning the base unit 22 in the chucking position, and a base unit. And a second horizontal surface portion 95c for positioning 22 at an intermediate position.

  On the other hand, the cam piece 57 of the cam lever 56 is formed with a second cam groove 96 as shown in FIG. 38 (b), and the second cam groove 96 places the base unit 22 in the chucking release position. A first horizontal surface portion 96a for positioning the base unit 22 at a chucking position, and a second horizontal surface portion 96c for positioning the base unit 22 at an intermediate position. doing.

  Here, the cam lever 56 is formed with a pair of front and rear guide grooves 97a, 97b on its main surface, and a pair of head guides protruding from the bottom surface portion of the bottom case 4 shown in FIG. 35 in these guide grooves 97a, 97b. By being engaged with the pins 98a and 98b, the base unit 22 can be slid in the left and right arrow Y1 and arrow Y2 directions in FIG. It is supported by.

  Further, a guide pin 99 protrudes upward at a position where the cam lever 56 and the drive lever 52 intersect. On the other hand, a guide groove 100 with which the guide pin 99 is engaged is formed on the bottom surface of the drive lever 52 shown in FIG. As shown in FIG. 35, the cam lever 56 is driven by the guide pin 99 sliding in the guide groove 100 in conjunction with the slide of the drive lever 52 in the directions of the arrow X1 and arrow X2 in FIG. A sliding operation is performed in a direction perpendicular to the sliding direction of the lever 56.

  As shown in FIG. 5 described above, the base 27 is positioned on the side of the disk mounting portion 23 on the side facing the drive lever 52 and is engaged with and supported by the first cam groove 95 of the drive lever 52. 1 is located on the side of the disc mounting portion 23 on the side facing the cam lever 56 and is engaged with and supported by the second cam groove 96 of the cam piece 57 and the vertical slit of the bent piece 58. The second support shaft 60 is located on the front side of the side opposite to the side facing the drive lever 52 and is rotatably supported by a shaft hole 61 provided on the other side of the bottom case 4. The third support shaft 62 is positioned on the front side of the side opposite to the side facing the cam lever 56, and is attached to the bottom of the bottom case 4 via an insulator 63 made of a viscoelastic member such as rubber. A fixed support 65 supported by a screw 64; It has.

  Therefore, in the base lifting mechanism 55, the first support shaft 59 slides in the first cam groove 95 of the drive lever 52 in conjunction with the slide of the drive lever 52 and the cam lever 56, and the second support shaft. When 60 slides in the second cam groove 96 of the cam lever 56 and the vertical slit of the bent piece 58, the disk mounting portion 23 side of the base 27 is chucked to the turntable 23a of the optical disk 2 with respect to the front surface side. The position is moved up and down between the chucking release position and the intermediate position separated from the turntable 23a.

  Specifically, in the chucking release position shown in FIGS. 58 (a) to 58 (d), as shown in FIG. 58 (a), the drive lever 52 is interlocked with the slide toward the front side in the arrow X1 direction. When the cam lever 56 is slid to the right in the direction of the arrow Y1, the first support shaft 59 is moved to the first horizontal plane portion 95a in the first cam groove 95 as shown in FIG. The second support shaft 60 is positioned on the first horizontal surface portion 95 a in the second cam groove 96. As a result, the base unit 22 is lowered to the chucking release position as shown in FIG.

  In the chucking position shown in FIGS. 59 (a) to 59 (d), the cam lever 56 moves in the arrow Y2 direction in conjunction with the slide of the drive lever 52 in the arrow X2 direction in FIG. 58 (a). By sliding, as shown in FIG. 59 (c), the first support shaft 59 is positioned on the top surface portion 95b in the first cam groove 95, and the second support shaft 60 is the second cam groove. It will be located in the top surface part 96b in 96. FIG. As a result, the base unit 22 is raised to the chucking position shown in FIG.

  60 (a) to 60 (d), the cam lever 56 is interlocked with the sliding of the drive lever 52 to the end on the back side in the direction of the arrow X2 in FIG. 60 (a). When the first support shaft 59 is slid to the left end in the direction of arrow Y2 in FIG. 60 (a), the second horizontal surface portion 95c in the first cam groove 95 is shown in FIG. 60 (c). The second support shaft 60 is positioned on the second horizontal surface portion 96 c in the second cam groove 96. Thereby, the base unit 22 descends to an intermediate position between the chucking release position and the chucking position shown in FIG.

  As shown in FIGS. 39A, 39B, 40A, and 40B, the drive lever 52 has a predetermined stroke with respect to the drive lever 52 as shown in FIG. A rack member 101 that is slidable in the front-rear direction of the arrow X1 direction and the arrow X2 direction in FIG. A rack gear 101a is formed on the rack member 101 in the front-rear direction. On the other hand, as shown in FIG. 35, the bottom case 4 has a drive motor 102 constituting a drive mechanism, a worm gear 103 attached to the rotating shaft of the drive motor 102, and a drive from the worm gear to the rack gear. A gear train 104 that transmits the power of the motor is arranged.

  Therefore, as shown in FIG. 35, the drive member 102 is driven to rotate in one direction, so that the rack member 101 is connected to the drive lever 52 via the worm gear 103, the gear train 104, and the rack gear 101a. 35, the drive lever 52 and the rack member 101 are integrally moved to the back side in the direction of the arrow X2 in FIGS. 35 and 39 while being pulled to the back side in the direction of the arrow X2 in FIG. On the other hand, as shown in FIG. 40, in this drive mechanism, when the drive motor 102 is driven to rotate in the other direction, the rack member 101 is illustrated with respect to the drive lever 52 via the worm gear 103, the gear train 104, and the rack gear 101a. 35, the drive lever 52 and the rack member 101 are integrally moved to the front side in the direction of the arrow X1 in FIGS. 35 and 40 (a) while being pulled out to the front side in the direction of the arrow X1.

  Further, as shown in FIG. 36, a circuit board 105 on which a drive control circuit that performs drive control of each part is configured is disposed on the bottom surface portion of the bottom case 4. The circuit board 105 is attached to the bottom surface of the bottom case 4 on the back side by screws. On the bottom surface of the bottom case 4 and the circuit board 105, an electronic component (not shown) such as an IC chip constituting a drive control circuit, a connector 106 for electrical connection of each part, First to fourth detection switches SW1, SW2, SW3, SW4 for detecting the operation are arranged.

  The drive control circuit is driven by the drive mechanism described above based on detection signals from the first to fourth detection switches SW1, SW2, SW3, SW4 that are operated by moving the drive lever 52. While detecting the position of the lever 52, drive control of the drive lever 52 by this drive mechanism is performed.

  Among these, the first detection switch SW <b> 1 is disposed at the front end of the bottom case 4. The first detection switch SW1 is a switch that is operated by the front end portion of the drive lever 52 to detect that the drive lever 52 is moved to the initial position or the drive lever 52 is at the initial position. Detect that 1 is in the initial state.

  On the other hand, the second detection switch SW2, the third detection switch SW3, and the fourth detection switch SW4 are arranged at predetermined intervals on the edge of the circuit board 9 facing the drive lever 52 in the moving direction of the drive lever 52. In FIG. 36, they are arranged in parallel across the arrow X1 direction and the arrow X2 direction. These second to fourth detection switches SW2, SW3, SW4 are as shown in FIGS. 37B and 37C when the drive lever 52 moves in the direction of the arrow X1 or the direction of the arrow X2 in FIG. Further, it is operated by an operating element 107a provided in a part of the cam portion 107 provided on the side surface portion of the drive lever 52, and switching between on and off is performed.

  Here, the second detection switch SW2 is a switch that is operated by the operation element 107a provided on the drive lever 52 when the drive lever 52 is moved to a position for ejecting the optical disc 2 mounted on the disc drive apparatus. The third detection switch SW3 is a switch operated by the operation element 107a when the optical disk 2 is inserted into the disk drive device and the drive lever 52 is moved to the position. The fourth detection switch SW4 is This switch is operated by the operator 107a when the optical disk 2 is chucked on the turntable 23a and the drive lever 52 is moved to a position where the information signal can be recorded or reproduced.

  Next, specific drive control of the disk drive device 1 configured as described above will be described.

  When the disk drive device 1 is in a state where the power source is shut off and stopped in a state where the optical disk 2 is inserted at a position in the apparatus 1 where information signals can be recorded or reproduced, the timing shown in FIG. Drive control of the drive lever 52 is performed according to the chart. When the optical disk 2 is not mounted in the apparatus 1 and the power is shut off and stopped, the drive lever 52 is controlled according to the timing chart shown in FIG. Is called.

  By the way, in the disk drive device 1 of this example, when the power is turned on in the state where the optical disk 2 is inserted into the disk drive apparatus 1 or in the state where the optical disk 2 is not inserted, the drive motor 102 is changed. The drive lever 52 is once moved in the direction of the arrow X1 in FIG. At this time, as shown in FIG. 61, when it is detected that the fourth detection switch SW4 is operated by the operation element 107a and is in the ON state, the drive lever 52 is directed in the rear direction which is the inner side in the apparatus 1. In the pulled-in state, it is detected that the optical disk 2 is inserted into a pull-in position where recording and reproduction are possible.

  Here, when the fourth detection switch SW4 is operated and it is detected that the optical disk 2 is in the recording / reproducing position, the drive motor 102 that has been rotationally driven in the other direction is driven in reverse in one direction to drive. The lever 52 is moved in the direction of the arrow X2 in FIG. 36, and the base unit 22 that has been moved to the chucking side is moved to an intermediate position so that the information signal can be recorded and reproduced with respect to the optical disc 2.

  When the optical disk 2 is in a recordable / reproducible state, an information signal is recorded / reproduced by inputting a recording / reproduction command of the apparatus 1 or the personal computer 1000.

  Even when the optical disk 2 is not installed in the disk drive device 1 and the power is shut off and stopped, the drive motor 102 is driven to rotate in the other direction as shown in FIG. The timing chart as shown in FIG. 62 shows that the first, second, and third detection switches SW1, SW2, and SW3 are moved once in the direction of arrow X1 in FIG. 36 and the movement of the drive lever 52 is controlled. 36, once the operation of the second detection switch SW2 is released and the second detection switch SW2 is operated again, the drive motor 102 rotates in one direction, and the drive lever 52 is moved to the arrow in FIG. When the first switch SW1 is moved again in the X1 direction and the first switch SW1 is operated again, the drive motor 102 is stopped, and the drive lever 52 is initialized on the front side of the housing 3. It is.

  Next, the power is turned on, and the position of the drive lever 52 is controlled according to the timing chart as shown in FIG. 62. After the initial setting is made that the disc drive device 1 can insert the optical disc 2, the housing A state in which the large-diameter optical disc 2A is inserted from the disc insertion / removal port 19 of FIG.

  First, when a large-diameter optical disk 2A is inserted from the disk insertion / removal port 19 of the housing 3, as shown in FIGS. 41 to 44, while driving the drive lever 52 according to the timing chart shown in FIG. A loading operation of the large-diameter optical disc 2A is performed.

  Specifically, first, as shown in FIG. 41, in the initial state of inserting the large-diameter optical disc 2A, the contact pin 76a of the pressing lever 76 shown in FIG. Thus, the drive lever 52 is biased toward the front side in the direction of the arrow X1 in FIG. Further, when the cam pin 76b of the pressing lever 76 presses the cam groove 78 of the driving lever 52, a thrust is generated on the driving lever 52 toward the front side in the direction of arrow X1 in FIG.

  Next, in the loading start state of the large-diameter optical disc 2A shown in FIG. 42, when the fourth rotating arm 49 pressed by the optical disc 2A is rotated toward the back side in the direction of the arrow d1, the connecting mechanism The drive lever 52 slides toward the back side in the direction of arrow X2 in FIG. At this time, the movement of the cam pin 46 b of the third rotating arm 46 is restricted in the cam groove 80 of the drive lever 52. For this reason, the slide member 92 moves against the driving lever 52 against the biasing force of the first tension coil spring 93a toward the back side in the direction of the arrow X2 in FIG. When the third rotating arm 46 is able to retract the optical disk 2A having a predetermined angular position, that is, the large-diameter optical disk 2A, the drive lever 52 moves by a predetermined stroke toward the rear side in the direction of arrow X2 in FIG. Then, it is detected by the drive control circuit that the operation of the third detection SW 3 has been switched, rotation drive in one direction of the drive motor 102 is started, and the drive lever 52 receives the drive force of the drive motor 102. 36 is moved in the direction of arrow X2.

  Next, in a state where the large-diameter optical disc 2A is centered so that the center hole 2a engages with the chucking mechanism 28, as shown in FIG. 43, the third contact member of the third rotating arm 46 is provided. 48, the fourth contact member 50 of the fourth rotation arm 49, and the fifth contact member 71c of the fifth rotation member 71 perform the centering operation of the large-diameter optical disc 2A. . Then, as shown in FIG. 44, chucking of the large-diameter optical disc 2A is completed. As shown in FIG. 63, this chucking operation is executed by driving the drive motor 102 in one direction and in the other direction and controlling the position of the drive lever 52 to move the base unit 22 up and down. .

  In this disk drive device 1, the base unit 22 is raised to the chucking position, and the first chucking operation for mounting the large-diameter optical disk 2A on the turntable 23a is performed, and the base unit 22 is lowered to the intermediate position. Then, after the spindle motor 24a drives the optical disk 2A to rotate and shifts the phase of the optical disk 2a, the base unit 22 is raised again to the chucking position, and the second chuck for mounting the optical disk 2A on the turntable 23a is performed. The king operation is performed.

  Next, in the recording / reproducing state in which the information signal is recorded or reproduced on the large-diameter optical disc 2A shown in FIG. 45, the third abutting member 48 of the third rotating arm 46 and the fourth rotating member The fourth contact member 50 of the arm 49 and the fifth contact member 71c of the fifth rotating member 71 are separated from the outer peripheral portion of the optical disc 2A.

  On the other hand, in this disk drive device 1, the ejecting operation of the loaded large-diameter optical disk 2A controls the rotation direction of the drive motor 102 and performs drive control of the drive lever 52 according to the timing chart shown in FIG. 46 and FIG. 47.

  Here, when ejecting the large-diameter optical disc 2A, as shown in FIG. 34 described above, the position of the support shaft 47 in the shaft hole 46a of the third rotating arm 46 is switched, so that FIG. As described above, the third rotating arm 46 rotates in a direction away from the outer peripheral portion of the large-diameter optical disc 2A at a timing earlier than that at the time of loading.

  More specifically, the third rotating arm 46 is interlocked with the slide of the driving lever 52 on the front side in the direction of the arrow X1, and first, the state shown in FIG. 56 (a) to the state shown in FIG. 56 (b). It becomes. At this time, the cam pin 46b slides on a portion of the cam groove 80 that is curved to the right in the drawing, whereby the third rotation arm 46 rotates counterclockwise.

  Next, when the state shown in FIG. 56C is reached, the cam pin 44b is brought into contact with the inclined surface in the cam groove 80, whereby the third rotating arm 46 is pressed to the left side in the drawing. At this time, the support shaft 47 passes through the lower straight portion of the L shape in the shaft hole 46a. At this point, the large-diameter optical disc 2A is ready to be ejected.

  Next, when the state shown in FIG. 56 (d) is reached, the position of the support shaft 47 in the shaft hole 46a is switched to the right end of the L-shape, so that the third rotating arm 46 is rotated around this position. Fully open.

  Next, when the state shown in FIG. 56 (e) is reached, the third rotating arm 46 is urged by the torsion coil spring 79 so that the position of the support shaft 47 in the shaft hole 46a is at the left end of the L-shape. By switching, the state before loading is restored again as shown in FIG.

  As described above, in the disk drive device 1, the third rotation arm 46 is switched from the center of rotation to the third rotation from the state in which the second tension coil spring 93 b is extended at the time of ejection. The arm 46 can be prevented from opening sharply, and the ejection operation of the large-diameter optical disc 2A can be stably performed.

  On the other hand, when the small-diameter optical disk 2B is inserted from the disk insertion / removal port 19 of the housing 3, the drive lever 52 according to the timing chart shown in FIG. While performing drive control, loading of the small-diameter optical disk 2B shown in FIGS. 48 to 52 is performed.

  Specifically, first, in a state where insertion of the small-diameter optical disk 2B into the disk drive device 1 is started, the contact pin 76a of the pressing lever 76 is contacted with the drive lever 52, so that the drive lever 52 is in FIG. It is biased toward the front side in the direction of the middle arrow X1. Further, when the cam pin 76b of the pressing lever 76 presses the cam groove 78 of the driving lever 52, a thrust toward the front side in the direction of the arrow X1 in FIG.

  Next, in the state shown in FIG. 49 in which the small-diameter optical disk 2B is further inserted into the disk drive device 1 and loading is started, the fourth rotating arm 49 pressed against the inserted small-diameter optical disk 2B is 49, the drive lever 52 slides toward the back side in the direction of the arrow X2 in FIG. 49 via the coupling mechanism 81. When the drive control circuit detects that the drive lever 52 has moved by a predetermined stroke in the direction of the arrow X2 in FIG. 49, the drive motor 102 starts to rotate in one direction. Then, the cam pin 46 b of the third rotating arm 46 moves in the cam groove 80 of the drive lever 52, so that the third contact member 48 is in contact with the outer peripheral portion of the small-diameter optical disc 2, and 3 pivots 46 in the direction in which the optical disk 2B is pulled.

  Next, in the state in which the small-diameter optical disc 2B is centered so that the center hole 2a engages with the chucking mechanism 28, as shown in FIG. 50, the first front-side contact of the first rotating arm 35 is performed. The rotation roller 73b on the back surface provided on the member 38, the rotation roller 73b on the back surface side provided on the second front surface side contact member 40 of the second rotation arm 36, and the fourth rotation arm 49 A centering operation of the small-diameter optical disc 2B is performed between the fourth contact member 50 and the fifth contact member 71c provided on the fifth rotating member 71. Then, as shown in FIG. 51, the chucking of the small-diameter optical disc 2B is completed.

  In this disk drive apparatus 1, the base unit 22 is raised to the chucking position, and the first chucking operation for mounting the small-diameter optical disk 2B on the turntable 23a is performed, and the base unit 22 is lowered to the intermediate position. Then, after the spindle motor 24a rotationally drives the small-diameter optical disk 2B and shifts the phase of the optical disk 2B, the base unit 22 is raised again to the chucking position, and the optical disk 2B is mounted on the turntable 23a for the second time. The chucking operation is performed.

  Next, in the recording / reproducing state in which the information signal is recorded or reproduced on the small-diameter optical disc 2B shown in FIG. 52, the rear surface provided on the first front-side abutting member 38 of the first rotating arm 35 is arranged. A rotating roller 73b, a rotating roller 73b on the back surface provided on the second front surface contact member 40 of the second rotating arm 36, and a fourth contact member 50 of the fourth rotating arm 49; Thus, the fifth contact member 71c of the fifth rotating member 71 is separated from the outer peripheral portion of the optical disc 2B.

  On the other hand, in this disc drive apparatus 1, the ejecting operation of the mounted small-diameter optical disc 2B controls the drive direction of the drive motor 102, while controlling the drive lever 52 according to the timing chart shown in FIG. This is performed as shown in FIGS.

  Specifically, first, in the ejected state of the small-diameter optical disc 2B shown in FIG. 53, the drive motor 102 is rotationally driven in the other direction, and the drive lever 52 slides toward the front side in the direction of arrow X1 in FIG. Accordingly, the fourth turning arm 49 is turned to the front side in the direction of arrow d2 in FIG. 53 via the connecting mechanism 81, and the contact pin 76a of the pressing lever 76 shown in FIG. 34 is driven. The first rotating arm 35 and the second rotating arm 36 are urged in a direction approaching each other by coming into contact with the lever 52. Thereby, as shown in FIG. 54, the ejection operation of the small-diameter optical disc 2B is performed.

  By the way, in this disc drive apparatus 1, as shown in FIG. 55, when the small-diameter optical disc 2B is inserted from the position shifted to the first rotating arm 35 side of the disc insertion / removal port, Although the first rotating arm 35 and the second rotating arm 36 are rotated in directions away from each other, the second support shaft that slides inside the guide groove 45 is caught by the curved portion 45a that is curved to the left. As a result, the rotation of the first rotation arm 35 and the second rotation arm 36 in the direction away from each other is restricted, and further insertion of the small-diameter optical disc 2B is prevented.

  Thereby, in the disk drive device 1, it is possible to prevent a state in which the loading operation of the small-diameter optical disk 2B is not properly performed.

  When the small-diameter optical disk 2B is inserted from the position shifted to the second rotation arm 36 side of the disk insertion / removal opening, rotational driving in one direction of the drive motor 102 is started at an early timing. . For this reason, the third rotating arm 46 forcibly pulls the small-diameter optical disk 2B toward the center. Therefore, there is no problem when the small-diameter optical disk 2B as described above is shifted to the first rotating arm 35 side.

  Further, in this disk drive apparatus 1, the drive lever 52 slides by the same stroke toward the back side in the direction of the arrow X2 shown in each drawing when either the large-diameter optical disk 2A or the small-diameter optical disk 2B is inserted. At that time, the drive motor 102 is driven in the other direction, and this drive lever 52 is moved to the back side in the direction of the arrow X2 shown in each figure, so that the subsequent drive lever 52 is driven by the same sequence control. Therefore, it is not necessary to provide a separate detection switch for each of the disks 2A and 2B having different outer diameters, and the structure can be simplified.

  In addition, as shown in FIGS. 66 and 67, the disk drive apparatus 1 includes a first disk guide for guiding the optical disk 2 inserted from the disk insertion / removal port 19 on the front side of the bottom case 4 while restricting the insertion angle. A mechanism 108 and a shutter opening / closing mechanism 109 for preventing a new optical disk 2 from being inserted into the housing 3 through the disk insertion / removal port 19 when the optical disk 2 is mounted on the turntable 23a. Yes.

  As shown in FIGS. 66, 67 and 68, the first disk guide mechanism 108 has an insertion guide lever 110 which is operated up and down while synchronizing with the up and down operation of the base unit 22 by the base up and down mechanism 55. . The insertion guide lever 110 is made of a resin member with little friction with the optical disc 2 and is disposed along the insertion direction of the optical disc 2, and the support shaft 111 provided on the base end side is located on the back side of the motor case 112. It is engaged with a provided bearing portion 113 and is rotatably supported. Further, in order to correspond to the large-diameter optical disk 2A and the small-diameter optical disk 2B, a horizontally long guide piece 110a along the disk insertion / removal opening 19 is formed on the upper surface of the insertion guide lever 110 so as to protrude toward the front side. . The insertion guide lever 110 is formed with a pressed piece 110b that is pressed by a pressing piece 114 provided on the base 27 so as to protrude from the side surface on the back side.

  Further, one end of a torsion bar 115 supported on the back surface of the motor case 112 is engaged with the lower surface of the guide piece 110 a of the insertion guide lever 110. The torsion bar 115 is inserted through a torsion coil spring 116 attached to the motor case 112 and is in a state where one end is directed upward and the other end is directed downward by the urging force of the torsion coil spring 116.

  In the first disc guide mechanism 108, as shown in FIG. 70A, when the base unit 22 is in the chucking release position, the pressing piece 114 of the base unit 22 is pressed against the insertion guide lever 110. By pressing 110b downward, the guide piece 110a of the insertion guide lever 110 can be raised to a position where the insertion angle of the optical disc 2 inserted from the disc insertion / removal port 19 is restricted. On the other hand, as shown in FIG. 70 (b), when the base unit 22 is in the intermediate position, the pressing of the pressing piece 114 of the base unit 22 against the pressed piece 110 b of the insertion guide lever 110 is released, whereby the insertion guide The guide piece 110a of the lever 110 can be lowered to a position away from the signal recording surface of the optical disc 2 mounted on the turntable 23a.

  Therefore, in this disk drive device 1, the second disk guide mechanism 108 moves up and down the insertion guide lever 110 while interlocking with the lifting and lowering operation of the base unit 22 by the base lifting mechanism 55. When the large-diameter optical disc 2A or the small-diameter optical disc 2B having a different outer diameter is inserted from the outlet 19, the guide piece 110 a of the insertion guide lever 110 regulates the insertion angle of the optical disc 2 inserted from the disc insertion / extraction opening 19. By guiding these optical discs 2 into the housing 3, it is possible to prevent the signal recording surface of the optical disc 2 from coming into contact with the components in the housing 3 and being damaged. Since the guide piece 110a of the insertion guide lever 110 has a horizontally long shape along the disc insertion / removal port 19, it corresponds not only to the large-diameter optical disc 2A but also to the small-diameter optical disc 2B having a smaller diameter than the optical disc 2A. Is possible.

  As shown in FIGS. 66, 67 and 69, the shutter opening / closing mechanism 109 has a shutter member 117 which is operated up and down in synchronization with the up / down operation of the insertion guide lever 110 by the first disk guide mechanism 108 described above. ing. The shutter member 117 is formed of a substantially rectangular flat plate member, and the rear side is engaged with a vertical slit 118 provided on the front surface of the bottom case 4 and supported so as to be slidable in the vertical direction. Further, a pair of shutter pieces 117a extended along the disk insertion / removal opening 19 is provided on both side surfaces of the shutter member 117 so as to correspond to the large-diameter optical disk 2A and the small-diameter optical disk 2B. The other end of the torsion bar 115 supports the back side of the shutter member 117. Thereby, the shutter member 117 is held downward.

  Then, the shutter member 117 is in synchronization with the ascending / descending operation of the insertion guide lever 110 by the first disk guide mechanism 108, and the closed position for closing the path of the optical disk 2 inserted from the disk insertion / removal opening 19 and the disk insertion / removal opening 19. Is moved up and down between the open position where the path of the optical disc 2 inserted from the open position is opened.

  Specifically, in the shutter opening / closing mechanism 109, as shown in FIG. 70A, when the base 27 is in the chucking release position, the path of the optical disk 2 into which the shutter member 117 is inserted from the disk insertion / removal opening 19 is opened. Can be lowered to the open position. On the other hand, in the shutter opening / closing mechanism 109, as shown in FIG. 70 (b), when the insertion guide lever 110 is raised when the base 17 is in the intermediate position, the torsion bar 115 supported by the motor case 112 is rotated about its axis. Rotates and pushes the shutter member 117 upward. As a result, the shutter member 117 can be raised to the closing position that blocks the path of the optical disk 2 inserted from the disk insertion / removal port 19.

  Therefore, in this disk drive device 1, when the optical disk 2 is mounted on the turntable 23 a, a new large-diameter optical disk 2 or a small-diameter optical disk 2 B is inserted into the housing 3 from the disk insertion / removal opening 19 by the shutter member 117. It is possible to prevent insertion. In particular, since the pair of shutter pieces 117a of the shutter member 117 has a double wing shape extending along the disk insertion / removal port 19, an optical disk 2B having a small diameter is formed from the gap between the shutter member 117 and the disk insertion / removal port 19. Can be prevented from being inserted.

  Further, as shown in FIGS. 66, 67 and 71, the disk drive device 1 is configured such that the small-diameter optical disk 2B inserted from the disk insertion / removal port is connected to the fourth contact member 50 of the fourth rotating arm 49. A second disk guide mechanism 118 is provided for guiding the inside of the housing 3 while restricting the contactable height.

  The second disc guide mechanism 118 has a guide lever 119 that is operated up and down in synchronism with the up and down movement of the base unit 22 by the base up and down mechanism 55 in the vicinity of the tip of the fourth rotating arm 49. . The guide lever 119 is made of a resin member with little friction with the optical disc 2 and is arranged along the insertion direction of the small-diameter optical disc 2B. A support shaft 119a provided on the base end side is a bottom surface portion of the bottom case 4. It is engaged with the bearing part 120a of the bearing member 120 provided in the, and is rotatably supported.

  Further, a guide pin 119 b is formed to protrude toward the drive lever 52 at the distal end side of the guide lever 119. On the other hand, as shown in FIGS. 37 (b) and 37 (c), the drive lever 52 is provided with a cam portion 121 to which the guide pin 119b is slidably contacted. On the other hand, an elastic piece 119c is provided on the proximal end side of the guide lever 119 so as to extend from the front side toward the back side. And the front-end | tip part of this elastic piece 119c is latched by the latching | locking part 120b of the bearing member 120. FIG. Therefore, the distal end side of the guide lever 119 is urged downward by the elastic force of the elastic piece 119c.

  A disk guide portion 119d for guiding the small-diameter optical disk 2B inserted from the disk insertion / removal port 19 to the fourth contact member 50 of the fourth rotating arm 49 is provided on the upper surface of the front side of the guide lever 119. Is provided. On the other hand, on the upper surface of the back side of the guide lever 119, when the small-diameter optical disk 2B is ejected from the disk insertion / removal port 19 to the outside of the housing 3, or from the disk insertion / removal port 19 the housing 3 constituting the apparatus main body An arm guide portion that guides from the back side to the front side of the housing 3 or from the front side to the back side of the housing 3 while restricting the fourth rotating arm 49 in the height direction when inserted into the inside. 119e is provided. Thereby, when the fourth turning arm 49 is turned from the back side to the front side of the housing 3 or from the front side to the back side of the housing 3, the small-diameter optical disc 2B and the turntable 23a It is possible to avoid a collision with the engaging protrusion 28a.

  When the drive lever 52 is slid in the front-rear direction in the direction of the arrow X1 or the arrow X2 in each drawing, the guide pin 119b slides on the upper surface portion of the cam portion 121. 19 is moved up and down between a guide position for regulating the small-diameter optical disk 2B inserted from 19 in the height direction and a retreat position separated from the lower surface of the small-diameter optical disk 2B mounted on the turntable 23a.

  Therefore, in this disk drive device 1, when the small-diameter optical disk 2 </ b> B is inserted from the disk insertion / removal port 19 of the housing 3, the second guide lever located near the tip of the fourth rotating arm 49 is inserted into the disk. By guiding the small-diameter optical disk 2B inserted from the outlet 19 to the inside of the housing 3 while regulating the small-diameter optical disk 2B so as to be able to contact the fourth contact member 50 of the fourth rotating arm 49, The subsequent loading operation of the small-diameter optical disk 2B can be performed appropriately and reliably.

  The insertion guide lever 110 described above is positioned near the tip of the second rotating arm 36, and the optical disk 2 inserted from the disk insertion / removal port 19 is inserted into the second front surface of the second rotating arm 36. It also has a function similar to that of the guide lever 119 that guides the inside of the housing 3 while restricting the height to allow contact with the side contact member.

  Incidentally, as shown in FIG. 72, the disk drive device 1 described above is provided with a rattling prevention mechanism 140 that prevents rattling of the base 27 during recording and reproduction.

  Specifically, the backlash prevention mechanism 140 prevents backlash of the base 22 moved to an intermediate position where information signals are recorded or reproduced with respect to the optical disc 2, and the second support shaft of the base 27 is prevented. As a pressing member that presses 60 to one side of the inner surface of the second cam groove 96 of the cam lever 56, a torsion coil spring 141 that is an elastic member attached to the cam lever 56 is provided.

  The torsion coil spring 141 has a wound portion 141a around which a wire is wound, and elastic displacement portions 141b and 141c from which the wire is extended with a predetermined spread angle. On the other hand, the cam piece 57 of the cam lever 56 is provided with a support shaft 142a at the upper left corner in the drawing and a pair of locking pieces 142a and 142b at the left and upper ends in the drawing. The torsion coil spring 141 is elastically displaced in a direction in which the pair of elastic displacement portions 141b and 141c are separated from each other in a state where the support shaft 142a is inserted through the winding portion 141a. The other elastic displacement portion 141c is locked to the other locking piece 142c, so that the cam piece 57 is attached to the surface opposite to the base 27. Yes.

  Further, the other elastic displacement portion 141 b of the torsion coil spring 141 is extended along a direction parallel to the main surface of the cam lever 56, and an intermediate portion thereof is elastically bent back to the main surface side of the cam lever 56 with an acute angle. A displaceable folded portion 141d is formed. The folded portion 141d can come into contact with the outer peripheral portion of the second support shaft 60 facing outward from the second horizontal surface portion 96c of the second cam groove 96.

  In the rattling prevention mechanism 140 configured as described above, when the base 27 is in the chucking release position shown in FIG. 58 and the chucking position shown in FIG. 59, as shown in FIG. Since the second support shaft 60 is located on the first horizontal surface portion 96a and the top surface portion 96b in the second cam groove 96, the second support shaft 60 facing outward from the second cam groove 96 is provided. The folded portion 141d of the torsion coil spring 141 is separated from the outer peripheral portion.

  On the other hand, when the base 27 is moved from this state to the intermediate position shown in FIGS. 60A to 60D, the second support shaft 60 of the base 27 as shown in FIG. 72B. Moves to the second horizontal surface portion 96 c in the second cam groove 96, so that the torsion coil spring 141 is moved against the outer peripheral portion of the second support shaft 60 facing outward from the second cam groove 96. While the folded portion 141d is in contact, the second support shaft 60 is pressed against the lower surface of the second cam groove by its elastic force.

  Thereby, when the base 27 is in the intermediate position, the folded portion 141 d of the torsion coil spring 141 presses the second support shaft 60 against one side of the inner surface of the second cam groove 96, whereby the second support shaft 60. And backlash between the first cam groove 62 and the second cam groove 62 are prevented.

  As described above, in this disk drive device 1, when the base 27 is in the intermediate position, the backlash prevention mechanism 140 described above can prevent the base 27 from rattling. Thus, the clearance between the optical disk and the components in the apparatus can be maintained, and stable recording of the optical disk can be ensured, and signal recording and reproduction operations can be appropriately performed on the optical disk.

  Note that the rattle prevention mechanism 140 can be configured as shown in FIG. 73, for example. That is, in this rattling prevention mechanism 140, as a pressing member that presses the second support shaft 60 of the base 27 against one side of the inner surface of the second cam groove 96 of the cam lever 56, an elastic member other than the above-described torsion coil spring 141 is used. In addition, for example, a leaf spring 151 as shown in FIG. 73 can be used.

  Specifically, the leaf spring 151 is extended along a direction parallel to the main surface of the cam lever 56 from an attachment portion 151a attached to the surface of the cam piece 57 opposite to the base 27. The elastic displacement portion 151 b has a middle portion of the elastic displacement portion 151 b and a bent portion 151 c that is bent toward the main surface of the cam lever 56. The bent portion 151c can come into contact with the outer peripheral portion of the second support shaft 60 facing outward from the second horizontal surface portion 96c of the second cam groove 96.

  73. The rattle prevention mechanism 140 configured as shown in FIG. 73 has the base 27 in the chucking release position shown in FIGS. 58 (a) to 58 (d) and in FIGS. 59 (a) to 59 (d). When in the chucking position shown in FIG. 73, the second support shaft 60 of the base 27 is positioned on the first horizontal surface portion 96a and the top surface portion 96b in the second cam groove 96 as shown in FIG. 73 (a). Thus, the bent portion 151c of the leaf spring 151 is separated from the outer peripheral portion of the second support shaft 60 facing outward from the second cam groove 96.

  On the other hand, when the base 27 is moved from this state to the intermediate position shown in FIGS. 60A to 60D, the second support shaft 60 of the base 27 as shown in FIG. 73B. Is moved to the second horizontal surface portion 96 c in the second cam groove 96, so that the leaf spring 151 of the leaf spring 151 is opposed to the outer peripheral portion of the second support shaft 60 facing outward from the second cam groove 96. While the bent portion 151c is in contact, the second support shaft 60 is pressed against the lower surface of the second cam groove by its elastic force.

  Thus, when the base 27 is in the intermediate position, the bent portion 151c of the leaf spring 151 presses the second support shaft 60 against one side of the inner surface of the second cam groove 96, whereby the second support shaft It is possible to prevent backlash between the second cam groove 62 and the second cam groove 62.

  Therefore, in this case as well, when the base 27 is at the intermediate position, it is possible to prevent the base 27 from rattling, so that the clearance between the optical disk and the components in the apparatus can be maintained inside the apparatus at this intermediate position. In addition, it is possible to ensure stable rotation of the optical disc and appropriately perform signal recording and reproduction operations on the optical disc.

  Further, the rattling prevention mechanism 140 can be configured as shown in FIG. 74, for example.

  Specifically, the rattling prevention mechanism 14 shown in FIG. 74 has a pressing member 161 slidably attached to the surface of the cam piece 57 opposite to the base 27, and the pressing member 161 is attached to one side in the sliding direction. And a tension coil spring 162 which is a biasing means for biasing.

  The pressing member 161 is formed of a long flat plate member, and the headed guide pins 164a and 164b provided in the cam piece 57 are inserted into a pair of guide holes 163a and 163b provided on both the left and right sides. The cam piece 57 is attached to be slidable in the same direction as the sliding direction of the cam lever 56, that is, in the left-right direction.

  In addition, a guide groove 165 into which the second spindle 60 that faces outward from the second cam groove 96 enters is cut out between the pair of guide holes 163a and 163b of the pressing member 161. The guide groove 165 has a shape corresponding to the second cam groove 96, but when the second support shaft 60 is positioned on the second horizontal surface portion 96 c in the second cam groove 96, The second support shaft 60 is in contact with the outer peripheral portion of the support shaft 60 and presses the second support shaft 60 against one side of the inner surface of the second cam groove 96 of the cam lever 56.

  One end of the tension coil spring 162 is locked to a locking piece 166 b provided on the cam piece 57, and the other end is locked to a locking hole 166 a provided on the pressing member 161. It is biased to one side in the sliding direction (here, the left side in the figure).

  In the rattling prevention mechanism 140 configured as shown in FIG. 74, the base 27 is in the chucking release position shown in FIGS. 58 (a) to 58 (d) and in FIGS. 59 (a) to 59 (d). When in the chucking position shown, the second support shaft 60 of the base 27 is positioned on the first horizontal surface portion 96a and the top surface portion 96b in the second cam groove 96 as shown in FIG. Thus, the second support shaft 60 facing outward from the second cam groove 96 can move in the guide groove 165 of the pressing member 161.

  On the other hand, when the base 27 is moved from this state to the intermediate position shown in FIGS. 60A to 60D, the second support shaft 60 of the base 27 as shown in FIG. 74B. Is moved to the second horizontal surface portion 96c in the second cam groove 96, but the second support shaft 60 is pressed against the cam piece 57 by contacting the end portion in the guide groove 165. The member 161 moves to the other side (right side in the figure) in the sliding direction against the urging of the tension coil spring 162.

  As a result, the pressing member 161 is in a state where the second support shaft 60 is pressed against the lower surface of the second cam groove 96 by the urging force of the tension coil spring 162, and the second support shaft 60 and the second cam groove 96 are It will prevent the play from occurring between.

  Therefore, in this case as well, when the base 27 is at the intermediate position, it is possible to prevent the base 27 from rattling, so that the clearance between the optical disk and the components in the apparatus can be maintained inside the apparatus at this intermediate position. In addition, it is possible to ensure stable rotation of the optical disc and appropriately perform signal recording and reproduction operations on the optical disc.

DESCRIPTION OF SYMBOLS 1 Disk drive apparatus, 2 Optical disk, 3 Housing | casing, 4 Bottom case, 5 Top cover, 8 Guide member, 9 Guide groove, 10 Window part, 11 Chassis, 19 Disk insertion / extraction opening, 22 Base unit, 23 Disk mounting part, 23a Turntable, 24 disc rotation drive mechanism, 25 optical pickup, 26 pickup feed mechanism, 27 base, 28 chucking mechanism, 34 disc transport mechanism, 35 first rotation arm, 36 second rotation arm, 38 first Front side contact member, 39 first back side contact member, 40 second front side contact member, 41 interlocking mechanism, 46 third rotating arm, 48 third contact member, 49 fourth Rotating arm, 50 fourth contact member, 52 drive lever, 55 base lifting mechanism, 56 cam lever, 66 push-up pin , 71 5th rotation member, 72 5th contact member, 81 connection mechanism, 101 rack member, 108 first disk guide mechanism, 109 shutter opening / closing mechanism, 110 insertion guide lever, 117 shutter member, 118 second Disc guide mechanism, 119 guide member, 140 rattling prevention mechanism, 141 torsion coil spring, 151 leaf spring, 161 pressing member, 162 tension coil spring

Claims (1)

A housing provided with a disk insertion / removal port for inserting / removing an optical disk on the front surface;
A disk mounting portion on which an optical disk inserted into the housing is mounted from the disk insertion / removal port, a disk rotation driving mechanism for rotating the optical disk mounted on the disk mounting portion, and rotation by the disk rotation driving mechanism A base unit having an optical pickup for recording or reproducing an information signal with respect to a driven optical disc, and a pickup feeding mechanism for operating the optical pickup in the radial direction of the optical disc, and these are integrally provided on the base When,
A disk transport mechanism for transporting the optical disk between a disk insertion / removal position where the optical disk is inserted / removed from the disk insertion / removal port and a disk mounting position where the optical disk is mounted on the disk mounting portion;
A chucking position for raising the base and mounting the optical disc on the disc mounting portion, a chucking release position for lowering the base and removing the optical disc from the disc mounting portion, and a base for the chucking position A base elevating mechanism for elevating the base between an intermediate position where the information signal is recorded or reproduced with respect to the optical disc,
A rattling prevention mechanism that suppresses the occurrence of rattling of the base located at the intermediate position,
The base elevating mechanism has a cam groove that is supported by a support shaft protruding from a side surface of the base and is slid along the side surface of the base while supporting the side surface of the base. The base is moved up and down while the support shaft slides in the cam groove by sliding the slide member.
The rattle prevention mechanism has a pressing member that presses the support shaft against one side of the inner surface of the cam groove,
The pressing member has a guide groove having a shape corresponding to the cam groove into which the support shaft enters. The pressing member is movably attached to the slide member and is urged to one side in the moving direction by an urging means. And
As the slide member is slid, the pressing member is moved integrally with the slide member while the support shaft slides in the cam groove and the guide groove , and the slide member is moved to the intermediate position. When the slide to the position, the support shaft comes into contact with the end of the guide groove , and the pressing member against the slide member against the bias of the biasing means on the other side in the moving direction And the pressing member presses the support shaft against one side of the inner surface of the cam groove by the urging force of the urging means.

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