CN1963928A - Disk drive device - Google Patents

Abstract

A recording medium driving device for recording information to or reproducing information from a recording medium, comprising: a device body into which a recording medium is inserted or removed; a transport mechanism transporting a recording medium in a loading direction and an ejecting direction medium; a mounting portion on which a recording medium is mounted; a transfer arm that moves and transfers the recording medium according to movement of the recording medium in a loading direction and an ejecting direction; and a driving mechanism that has a drive mechanism for applying a driving force. A driving source for moving a conveying arm, wherein the conveying arm includes: a contact portion that comes into contact with the recording medium; and an urging member that pushes the contact portion in an ejecting direction of the recording medium.

Description

disk drive

References to related applications

The present application contains subject matter of Japanese Patent Applications JP2005-325360 and JP2005-351341 filed in the Japan Patent Office on November 9, 2005 and December 5, 2005, the entire contents of which are hereby incorporated by reference.

technical field

The present invention relates to a disc drive for recording and/or reproducing information signals to and from an optical disc, and more particularly to a so-called slot-in type disc drive for directly inserting an optical disc into a device body.

Background technique

Optical discs such as CD (Compact Disc), DVD (Digital Versatile Disc), and BD (Blu-ray Disc) and opto-optical discs such as MO (Magneto Optical Disk), MD (MiniDisc) are now widely known as optical discs. Various disk drive devices corresponding to these disks, cartridges, and the like have appeared on the market.

Types of disk drive devices include, for example: a type in which a cover and a door provided in a housing are opened and a disk is directly mounted on a turntable from the opened cover or door; A type in which the tray out of the case automatically mounts the disc on the turntable inside the case when the tray is pushed into the case; and a type in which the disc is directly mounted on the turntable provided on the tray. In all of these types, however, an operator is required to operate to open and close the cover or door, push and pull the tray into and out of the housing, and mount the platters on the turntable.

On the other hand, there is a so-called slot-in type disc drive in which the disc is automatically mounted on the turntable only by inserting the disc from a disc insertion and ejection opening provided on the front surface of the housing. A slot insertion type disc drive includes a pair of guide wheels opposed to each other that grip an optical disc inserted from a disc insertion and ejection opening. The disk drive device performs a loading operation to push an optical disk inserted from the disk insertion and ejection opening into the housing by rotating the pair of guide wheels in opposite directions, respectively, and an ejection operation to insert and eject the disk through the disk The opening pops out of the housing.

In a mobile device such as a notebook personal computer mounted with a disk drive device, further reductions in size, weight and thickness are required. Therefore, the demand for reduction in size, weight, and thickness of the disk drive device has also become urgent. Under these circumstances, a disc drive device is proposed here as a slot-insert type disc drive device, in which a disc drive device is provided at the front end that will contact the outer edge of the disc inserted through the disc insertion and ejection openings of the front panel. The contact part, and set a plurality of rotating arms, the base end of which is a rotatable support. When these rotating arms are rotated along a plane parallel to the optical disk, the disk drive device performs a loading operation to push the optical disk into the casing and an ejection operation to eject the optical disk out of the casing through the disk insertion and ejection opening (see, for example, JP- A-2002-117604 and JP-A-2005-100595). Among disk drive devices with reduced thickness, a thickness of 12.7 mm is set as a standard size for an ultra-thin disk drive device mounted in a notebook personal computer or the like. In addition, a disc drive device having a thickness reduced to 9.5 mm, which is equal to the thickness of a hard disk drive (HDD) unit, has also been proposed.

In such a disk drive apparatus, when performing a disk loading operation and an ejecting operation while rotating a plurality of rotating arms in a plane parallel to the optical disk, it is necessary to prevent the rotating arms from coming into contact with the disk mounting portion that rotatably holds the optical disk. The turntable of the turntable and the engagement protrusion arranged in the turntable and passing through and engaging with the central hole of the optical disk collide.

However, in the thickness-reduced disk drive device, since the case thickness increases, it is difficult to set the rotational area of the arm high. Therefore, it is necessary to rotate the arm at a minimum height to prevent the arm from colliding with the disk mounting portion. In a disk drive device installed in a portable electronic device, the rotary arm may be driven even when the electronic device is not in a stable position. Therefore, the arm may shake to collide with the disk mounting portion.

Furthermore, in the above-mentioned disk drive device provided with a plurality of rotary arms and performing the disk loading operation and ejection operation when the rotary arms are rotated in a plane parallel to the disk, the disk drive device is ejected by rotating the rotary arms. For an optical disk, the rotating arm has a urging member such as a torsion coil spring that urges rotation in the direction in which the optical disk is ejected. When ejecting the optical disc out of the device body, it is necessary to expose the opening formed in the center of the optical disc and to securely arrange the optical disc at a position to prevent the optical disc from falling due to its own weight. Since the user can hold the opening and sides of the optical disc and take out the optical disc without touching the signal recording surface, the optical disc can be fixedly set in one position.

However, in the disk drive device, since the driving force for ejecting the disk is only elastic force, the fixed position of the disk ejected out of the device often changes. The change in the fixing position of the optical disc may be caused by the change in elastic force caused by the aging and deterioration of the force applying member. In addition, in the disc insertion/removal hole where the disc is inserted or ejected, a panel curtain made of non-woven fabric may be provided to stabilize the fixed position of the disc and remove dust adhering to the signal recording surface of the disc wait. However, when the mass of the panel curtain varies, it is difficult to stabilize the fixed position of the optical disc.

In addition, a disc drive device is proposed, which includes a motor and a link mechanism for transmitting the driving force of the motor to the rotating arm to stabilize the fixed position of the disc. The lever mechanism controls the rotating arm to stabilize the fixed position of the disc. However, in such a disc drive device, when the disc is ejected out of the device body, a force in a direction opposite to the driving direction of the motor and the link mechanism may act on the disc. This is because there is an obstacle such as a book or part of the user's body on the disc's transport area, or a user who suddenly decides to stop the disc from being ejected pushes the disc back in the direction of insertion. In this situation, additional loads are applied to the arm, motor and linkage. In addition, the optical disk may be broken due to a collision force (ie, a driving force applied by the rotary arm in the ejection direction and a force acting in the opposite direction).

Contents of the invention

Therefore, it is desirable to provide a disc drive device having a reduced thickness capable of preventing collisions between the rotating arm and the disc mounting portion.

It is also desirable to provide a disc transfer mechanism and a disc driving device by which, even if the above-mentioned force in the opposite direction is applied to the disc, no additional load is applied to the rotary arm, the motor and the link mechanism, and the Prevent the breakage of the disc.

According to an embodiment of the present invention, there is provided a recording medium driving device for recording information to or reproducing information from a recording medium. The recording medium driving device includes: a device body into which a recording medium is inserted or removed; a transfer mechanism which transfers the recording medium in a loading direction and an ejecting direction; a mounting part on which the recording medium is mounted; a transfer arm which according to the recording medium moves and conveys the recording medium along the movement of the loading direction and the ejecting direction; and a driving mechanism having a driving source for applying a driving force to move the conveying arm, wherein the conveying arm includes: a contact portion that comes into contact with the recording medium ; and an urging member that pushes the contact portion in the ejection direction of the recording medium.

According to another embodiment of the present invention, there is provided an electronic device, including an instruction unit, which issues instructions for inserting and ejecting operations of a recording medium to a recording medium driving device that records information to or reproduces information from a recording medium, Wherein the recording medium driving device comprises: a device body into which the recording medium is inserted or removed; a conveying mechanism which conveys the recording medium in a loading direction and an ejecting direction; a mounting part on which the recording medium is mounted; a conveying arm which according to the recording medium moves and conveys the recording medium along the movement of the loading direction and the ejecting direction; and a driving mechanism having a driving source for applying a driving force to move the conveying arm, wherein the conveying arm includes: a contact portion that comes into contact with the recording medium ; and an urging member that pushes the contact portion in the ejection direction of the recording medium.

Description of drawings

In the attached picture:

1 is an external perspective view showing an electronic device equipped with a disc drive device according to the present invention;

2 is an external perspective view showing a disk drive device according to the present invention;

3 is a perspective view showing the inside of the disk drive device according to the present invention;

Fig. 4 is a perspective view showing the disc drive device after the main chassis is removed;

5 is an external perspective view showing a top cover;

6 is a perspective view showing the inside of the disk drive device according to the present invention;

7 is a perspective view showing a bottom unit;

8 is a sectional view showing a connection portion of the bottom frame and the sub-frame;

Figure 9 is a diagram showing the support structure with the shock absorber between the bottom frame of the bottom unit and the sub-frame;

FIG. 10 is a perspective view showing another example of a disk drive device;

11 is a cross-sectional view showing another example of a disk drive device;

Fig. 12 is a plan view showing the process of transferring the optical disc and showing the start of insertion of the optical disc;

13 is a plan view showing a process of inserting an optical disc and showing a state in which an eject arm is rotated by the optical disc;

14 is a plan view showing a process of inserting an optical disc and showing a state in which an eject arm and a loading arm are driven by a slider;

15 is a plan view illustrating a process of inserting an optical disc and showing a state in which the optical disc is transported to a central position;

16 is a plan view showing a process of inserting an optical disc and showing a state in which the optical disc is released from each arm and allowed to rotate freely;

17 is a plan view showing a process of ejecting an optical disc and showing a state where the optical disc comes into contact with each arm;

Fig. 18 is a plan view showing the process of ejecting the optical disc and showing the state in which the optical disc is conveyed by the arms;

Fig. 19 is a plan view showing the process of ejecting the optical disc and showing the state in which the optical disc is conveyed by the arms;

Fig. 20 is a plan view showing a process of ejecting an optical disc and showing a state in which the optical disc is ejected and stopped at a predetermined position;

Figure 21 is a perspective view showing a loading cam plate;

Figure 22 is an exploded perspective view showing the eject arm;

23 is a plan view showing a circuit board on which first to fourth switches and a slider for pressing down these switches are mounted;

Figure 24 is a timing diagram when the disc is loaded;

Figure 25 is a timing diagram when the disc is ejected;

Fig. 26 is a plan view showing a state in which the disc is clamped during insertion of the disc;

Fig. 27 is a perspective view showing a state in which the transmission is hindered by an obstacle in the transmission area of the optical disc during the process of ejecting the optical disc;

Fig. 28 is a perspective view showing an eject arm provided with a stopper;

Fig. 29 is a plan view showing a state in which wrong insertion of a small-diameter optical disc is prevented;

30 is a perspective view showing a disk drive apparatus in which a guide protrusion for guiding rotation of the eject arm is provided on the upper surface of the main chassis;

FIG. 31A is a schematic view showing the rotation track of the eject arm guided by the guide protrusion and showing the state before the eject arm rises to the protrusion;

FIG. 31B is a schematic view showing the rotation track of the eject arm guided by the guide protrusion and showing the state in which the eject arm has moved to the protrusion;

Fig. 31C is a schematic diagram showing the rotation track of the eject arm guided by the guide protrusion and showing the state that the eject arm has been lower than the protrusion;

32A and 32B are perspective views showing a slider and a sub-slider;

Fig. 33 is a sectional view showing the positional relationship between guide pins and guide holes at the chuck release position, disc insertion position and recording/reproduction position;

34 is a perspective view showing guide pins and guide holes in a state where the bottom unit is lowered to the chuck release position;

35 is a perspective view showing the guide pins and the guide holes in a state where the bottom unit is raised to the snap-in position; and

36 is a perspective view showing guide pins and guide holes in a state where the bottom unit is raised to a recording and reproducing position;

Detailed ways

The disc drive device according to the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 1 , the disk drive device 1 is a slot-in type disk drive 1 mounted on a device body 1001 of a notebook type personal computer 1000 . As shown in FIG. 2, this disk drive device 1 has a structure in which the thickness of the entire device is reduced to, for example, about 12.7 mm. This disc drive device 1 is capable of applying information recording and reproducing signals to an optical disc 2 such as CD (Compact Disc), DVD (Digital Versatile Disc), or BD (Blu-ray Disc).

First, the specific structure of the disk drive apparatus 1 will be discussed in detail. As shown in FIGS. 3-6, the disk drive device 1 includes a casing 3 as a casing of the device body. The case 3 includes a substantially flat box-shaped bottom case 4 as a lower case and a top cover 5 as a top plate covering an opening on the bottom case 4 . A drive mechanism 120 which is exposed on the upper side of the bottom unit 22 and provides a drive force for disc transfer, which will be described later, and a main body covering the disc transfer mechanism 50 to which the drive force of the drive mechanism 120 is transmitted are installed in the casing 4. Frame 6.

As shown in FIGS. 2 and 5 , the top cover 5 includes a top plate portion 5 a closing the bottom case 4 and a pair of side plate portions 5 b formed by slightly bending the periphery of the top plate portion 5 a along both sides of the bottom case 4 . A substantially circular opening 7 is formed approximately at the center of the top plate portion 5a. During the clamping operation described later, the engaging protrusion 33a of the turntable 23a engages with the central hole 2a of the optical disc 2 and is exposed through the opening 7 . The periphery of the opening 7 of the top plate portion 5a forms a contact protrusion 8 slightly protruding inwardly of the case 3, which contacts the periphery of the central hole 2a of the optical disc 2 held on the turntable 23a.

On the front surface side of the top plate portion 5a, a pair of guide protrusions 11a, 11b for guiding an optical disc 2 inserted from a later-described disc insertion and ejection opening 19 and restricting the optical disc 2 in the height direction are formed toward the casing 3. internal expansion. The pair of guide projections 11a, 11b have a substantially partial tapered shape at positions substantially symmetrical along the centerline of the insertion direction of the optical disc 2 through the opening 7, and this shape is characterized by rising to draw along the insertion direction of the optical disc 2. Out of the arc and up so that the diameter of the arc decreases continuously from the outside to the inside in a direction substantially perpendicular to the insertion direction of the optical disc 2 . The pair of protrusions 11a, 11b have a shape obtained by a taper divided in the axial direction thereof and its apex is exposed to the inner side of the top plate portion 5a. The guide protrusions 11a, 11b continuously decrease and become thinner from the outside to the inside.

Since the pair of guide protrusions 11a, 11b have such a shape, the guide protrusions 11a, 11b can smoothly guide the optical disc 2 inserted into the housing 3 from the disc insertion and ejection opening 19 while correcting the disc 2 along the width direction of the disc 2. deviation. Since the guide protrusions 11a, 11b of this shape are provided in the top cover 5, the rigidity of the top plate portion 5a can be improved. The main surface on the inner side of the top plate portion 5 a is processed to reduce frictional resistance with the optical disc 2 .

The bottom case 4 is made of sheet metal formed into a substantially flat box shape. Its lower surface is substantially rectangular. A platform portion 4 a disposed higher than the lower surface and extending outward is disposed on one side of the bottom case 4 . A loading arm 51b for pushing the optical disc 2 into the housing 3, which will be described later, is supported by the table portion 4a so as to be freely rotatable.

On the lower surface of the bottom case 4, a circuit board 59 is installed by screwing etc., and the circuit board is provided with: electronic devices such as IC chips constituting the drive control circuit; the joints for realizing the electrical connection of each unit; detecting the operation of each unit detection switch etc. On a part of the peripheral wall of the bottom case 4, a terminal opening 4b is provided through which the terminals mounted on the circuit board 59 are exposed.

The top cover 5 is mounted on the bottom cover 4 by screwing. Specifically, as shown in FIG. 5, a plurality of through holes 13 through which screws 12 pass are formed on the outer edge of the top plate portion 5a of the top cover 5. As shown in FIG. A plurality of guide pieces 14 bent inwardly at substantially right angles are provided on both side plate portions 5b. On the other hand, as shown in FIG. 3 , a plurality of fixing pieces 15 bent inwardly at substantially right angles are provided on the outer edge of the bottom case 4 . Screw holes 16 corresponding to the through holes 13 of the top cover 5 are formed on the fixing piece 15 . A plurality of slits (details of which are not shown) for preventing the plurality of guides 14 of the top cover 5 from coming off are formed on both sides of the bottom case 4 .

When installing the top cover 5 to the bottom case 4 , the top cover 5 slides from the front side to the rear side in a state where the guide pieces 14 of the top cover 5 are engaged with the guide slots of the bottom cover 4 . As a result, the top plate portion 5 a of the top cover 5 closes the upper opening of the bottom cover 4 . In this state, the screws 12 are screwed into the screw holes 16 of the bottom case 4 through the plurality of through holes 13 of the top cover 5 . In this way, the casing 3 shown in FIG. 2 is formed.

As shown in FIG. 2 , a substantially flat rectangular front panel 18 is mounted on the front surface of the housing 3 . The front panel 18 is provided with a disc insertion and ejection opening 19, into which the disc 2 is inserted and removed. In other words, the optical disc 2 can be inserted into the housing 3 through the disc insertion and ejection opening 19 and ejected out of the housing 3 from the disc insertion and ejection opening 19 . On the disk insertion and ejection opening 19, unillustrated panel curtains are formed along both side portions perpendicular to the longitudinal direction. The panel curtain is made of non-woven fabric or the like cut in a long shape and bonded to the rear surface side of the front panel 18 by an adhesive or the like. As a result, the panel curtain prevents impurities such as dust from entering the housing 3 . Furthermore, since the panel curtain comes into sliding contact with the surface of the disk when the disk 2 is inserted or removed, the panel curtain prevents impurities such as dust from adhering to the disk 2 .

On the front surface of the front panel 18 are provided a display unit 20 that displays an access state of the optical disc 2 by emitting light, and an eject button 21 that is depressed when the optical disc 2 is ejected.

Near the side where the platform portion 4a of the bottom case 4 is provided, a pair of guide protrusions 124 for sliding a slider 122 to be described later of the drive mechanism 120 along this side are protrudingly provided along one side, and they are spaced apart from each other. (See Figure 10).

As shown in FIG. 3 and FIG. 4 , the main frame 6 is fixed on the lower surface of the bottom case 4 by screwing. The main frame 6 is disposed above the circuit board 59 to partition the inner cavity of the bottom case 4 into an upper half and a lower half at a height substantially equal to the platform 4a. As a result, in the housing 3, an area closer to the top cover 5 side than the main chassis 6 is a disk transfer area, on which the loading arm 51 and the eject arm 52 are exposed to rotate freely. The first and second link arms 54 and 55, the operating arm 58, and the cam ring 57 of the disk transfer mechanism 50 are provided in an area closer to the bottom case 4 side than the main chassis 6, and the disk transfer mechanism 50 will include The driving force of the drive motor 121 and the drive mechanism 120 of the slider 122 is transmitted to the eject arm 52 .

The main frame 6 is made of substantially flat sheet metal and has: an upper surface 6a covering the bottom case 4 from the rear surface side of the bottom case 4 to a side on which the platform portion 4a is formed; A pair of side plate portions 6b obtained by bending the periphery of the upper surface 6a. In the main chassis 6, a bottom opening 6c and an ejection arm opening 6d are respectively formed on the upper surface 6a, and the bottom unit 22 and the ejection arm 52 of the disk drive mechanism 50 are exposed to the transfer area of the optical disk 2 through these two openings. A side plate opening 6e through which the loading cam plate 53 connected to the slider 122 slid by the driving motor 121 is inserted is formed in the side plate portion 6b on the side where the platform portion 4a is provided. On the upper surface 6a of the main chassis 6, the eject arm 52 of the disc transfer mechanism 50 that transfers the optical disc 2 to the outside and inside of the housing 3, the operating arm 58 that transmits the driving force of the drive mechanism 120 and operates the eject arm 52, and the guide The moving cam ring 57 of the second link arm 55 is locked on the bottom case 4 side.

In the main frame 6, a plurality of guides 6f bent inwardly at substantially right angles and through holes 6h for fixing the main frame 6 to the bottom case 4 are provided on both sides of the side plate portion 6b. On the other hand, in the bottom case 4, screw holes 4c are formed at positions corresponding to the through holes 6h. The main chassis 6 is fixed by screwing screws into the screw holes 4c and the through holes 6h.

The disk drive apparatus 1 includes a bottom unit 22 forming a drive main body on a lower surface of the bottom case 4 . The bottom unit 2 has a bottom frame 27 formed of a substantially rectangular frame body as shown in FIG. 7 . The bottom frame 27 is supported by a sub-frame 29 via a plurality of shock absorbers 28a-28c. The bottom frame 27 is arranged on the bottom case 4 through the sub-frame 29 , whereby one side along the direction of the bottom unit 22 is substantially located in the center of the case 3 . In the bottom unit 22, on one end side in the longitudinal direction, there is provided a disc mounting portion 23 for receiving the optical disc 2 inserted into the inner cavity of the housing 3 from the disc insertion and ejection opening 19, and is driven to be mounted on the disc mounting portion. The disc 2 is rotated on the disc 23 by the disc rotation driving mechanism 24 . The bottom unit 22 has: an optical pickup 25 for writing signals to or reading signals from the optical disc 2 driven by a disc rotation drive mechanism 24; and a pickup feeding mechanism 26 for moving the optical pickup in the longitudinal direction 25 to thereby feed the optical pickup 25 in the radial direction of the optical disk 2. The optical pickup 25 and the pickup feeding mechanism 26 are integrally provided in the bottom chassis 27 . Since the bottom chassis 27 is supported by the subchassis 29 , the bottom unit 22 is operated by a bottom lifting mechanism 150 described later to rise and fall with the subchassis 29 relative to the optical disk 2 .

The bottom unit 22 is exposed on the disk transfer area through the opening of the bottom 6c of the main chassis 6 so that the disk mounting portion 23 is located substantially centrally on the lower surface of the bottom case 4 . The bottom unit 22 can be raised and lowered by the bottom lifting mechanism 150 . In the original state, the bottom unit 22 is positioned below the optical disc 2 inserted into the inner cavity of the casing 3 from the disc insertion and ejection opening 19 . According to the loading operation of the optical disc 2, the bottom unit 22 rises and is rotatably engaged with the optical disc 2. As shown in FIG. After the recording and reproducing operations, the base unit 22 is lowered by the base lift mechanism 150, released from the engagement with the optical disc 2, and retracted from the transfer area of the optical disc 2.

The bottom frame 27 is formed by punching a sheet metal into a predetermined shape and bending the peripheral edge of the sheet metal slightly downward. Continuously formed on the main surface of the bottom chassis 27 are: a substantially semicircular opening 27a for a turntable through which a turntable 23a of a later-described disk mounting portion 23 is exposed upward; and a substantially rectangular opening for a pickup. 276, the objective lens 25a of the optical pickup 25 described later is exposed upward through this opening. As shown in FIG. 6, a decorative sheet 30 is fixed to the upper surface of the bottom frame 27, and openings are formed in the decorative sheet 30 corresponding to the openings 27a, 27b.

In the bottom chassis 27 , a guide plate 32 that prevents the optical disk 2 from contacting the bottom chassis 27 and guides the optical disk 2 to the contact part 74 of the eject arm 52 is formed at one end on the side opposite to the disk mounting portion 23 . A fiberboard 40 is attached to the guide plate 32 . Therefore, even when the optical disc 2 comes into sliding contact with the guide plate 32, the signal recording surface of the optical disc 2 can be prevented from being scratched.

In the bottom frame 27, coupling pieces 41a, 41b coupled to the sub-frame 29 via shock absorbers 28a, 28b are protrudingly provided on both sides in the longitudinal direction. A plurality of insertion holes 43 are drilled in each coupling piece 41a, 41b, and the insertion holes 43 are connected with coupling pieces 45a, 45b formed in the sub-chassis 29 and through which stepped screws 42 are inserted.

The disk mounting portion 23 has a turntable 23 a driven and rotated by a disk rotation driving mechanism 24 . A chuck mechanism 33 for mounting the optical disc 2 is provided at the center of the turntable 23a. The chuck mechanism 33 has an engaging protrusion 33a engaged in the central hole 2a of the optical disc 2 and a plurality of engaging pawls 33b locking the periphery of the central hole 2a of the optical disc 2 engaged with the engaging protrusion 33a. The chuck mechanism 33 holds the optical disc 2 on the turntable 23a.

The disk rotation drive mechanism 24 has a flat-shaped spindle motor 24a to rotate the disk integrated with the turntable 23a. The spindle motor 24a is screwed to the lower surface of the bottom frame 27 via the supporting plate 24a so that the turntable 23a provided on the upper surface protrudes slightly from the turntable opening 27a of the bottom frame 27 .

The optical pickup 25 has an optical assembly that collects a light beam emitted from a semiconductor laser as a light source with an objective lens 25a and irradiates the light beam to the signal recording surface of the optical disc 2, and detects the signal generated by a light detector made of a light receiving element or the like. The signal recording surface of the optical disc 2 is reflected back by the return beam. The optical pickup 25 writes/reads signals to/from the optical disc 2 .

The optical pickup 25 has an objective lens driving mechanism such as a two-axis driver, which drives the objective lens to be displaced in the optical axis direction (focusing direction) and in a direction perpendicular to the recording track of the optical disc 2 (tracking direction). The optical pickup 25 is driven and controlled based on the detection signal detected from the optical disc 2 by the photodetector to be used on the signal recording surface of the optical disc 2 while displacing the objective lens 25a in the focusing direction and the tracking direction by the two-axis driver. The focus servo of focusing the objective lens 25a and the tracking servo of focusing and forming a beam spot by the objective lens 25a follow the recording track. A three-axis driver other than focus control and tracking control can be used as the objective lens drive mechanism, which makes it possible to limit the inclination (skew) of the objective lens 25a with respect to the signal recording surface of the optical disc 2, thereby making the light beam condensed by the objective lens 25a Radiates vertically onto the signal recording surface of the optical disc 2 .

The pick-up feeding mechanism has: the pick-up bottom 34 that optical pick-up 25 is installed; A pair of guide rods 35a, 35b that slidably support the pick-up bottom 34 radially along the optical disc 2; The pair of guide rods 35a, 35b support the pickup bottom 34 and the displacement driving mechanism 36 for displacing it.

In the picker bottom 34, a pair of guides 37a, 37b are formed, in which a guide hole is formed for passing one of the guide bars 35a, 35b; the picker bottom 34 is also formed with a guide 38, in which A guide groove for engaging the other guide rod 35b is formed in the guide member 38. As a result, the pickup bottom 34 is slidably supported by the pair of guide rods 35a, 35b.

The pair of guide rods 35a, 35b are provided on the lower surface of the bottom chassis 27 parallel to the radial direction of the optical disk 2. As shown in FIG. The pair of guide rods 35a, 35b guide the pickup bottom 34 on which the optical pickup 25 is exposed through the pickup 27b opening of the bottom chassis 27 on the inner and outer edges of the optical disk 2 .

The displacement drive mechanism 36 converts the rotary drive of the drive motor 31 connected to the bottom frame 27 into a linear drive through a gear and a rack (not shown) and drives along the direction of the pair of guide rods 35a, 35b (that is, the diameter of the optical disc 2). Drive the picker bottom 34 toward) and displace it. For example, a stepping motor including a lead screw is used as the displacement drive mechanism 36 .

Next, the sub-frame 29 supporting the bottom frame 27 via the shock absorbers 28 will be described. The subchassis 29 is raised and lowered according to the conveyance of the optical disk 2 by the bottom lift mechanism 150 as described later, thereby bringing the bottom chassis 27 closer to the optical disk 2 or moving the bottom chassis 27 away from the optical disk 2 . The sub-chassis 29 has a shape substantially similar to that of the bottom chassis 27 and is formed of a substantially rectangular frame slightly larger than the bottom chassis 27 . The sub-frame 29 is coupled to the bottom frame 27 to constitute the bottom unit 22 together with the bottom frame 27 . A bottom frame 29 is provided along the side on which the guide bar 25a is provided. A reinforcing frame 44 for reinforcing the sub-frame 29 is integrally attached to the sub-frame 29 . In the sub-frame 29 are formed coupling pieces 45 a , 45 b to which the shock absorbers 28 a , 28 b are mounted and which are coupled to the bottom frame 27 . The gusset 45 a is provided on one side in the longitudinal direction and at a position corresponding to the gusset 41 a of the bottom chassis 27 . The coupling piece 45 b is provided protrudingly on the other side in the longitudinal direction and at one end on the disk mounting portion 23 side corresponding to the coupling piece 41 b of the bottom chassis 27 .

At one end of the opposite side of the disk mounting portion 23 on the other side in the longitudinal direction, no gussets are provided in the sub-chassis 29 and are fixed to the reinforcement of the sub-chassis 29 combined with the gussets 41c of the bottom chassis 27. A coupling piece 45c is provided in the frame 44 . In each gusset 45a-45c, as shown in FIG. 8, an insertion hole 46 continuous to each insertion hole 43 of each gusset 41a-41c of the bottom frame 27 is drilled. Shock absorbers 28a-28c are connected to coupling pieces 45a-45c, respectively. The connecting pieces 45a-45c are connected to the connecting pieces 41a-41c of the bottom frame 27 through the shock absorbers 28a-28c. Stepped screws 42 pass through the respective insertion holes 43 and 46 .

The sub-chassis 29 has, as shown in FIG. 7 , a first support rod 47 located on the disk mounting portion 23 side on the side opposite to the slider 122 described later and engaged with the first cam of the slider 122 to be supported. the slot 130; the second support lever 48, which is located on the side of the disk mounting portion 23 on the opposite side to the sub-slider 151 and engages with the second cam slot 170 of the sub-slider 151 to be supported; and the third support A lever 49 which is located on the front surface side opposite to the slider 122 and is rotatably supported in a lever hole 9 provided in the side plate portion 6b of the main chassis 6 .

Therefore, in the sub-chassis 29 , as the slider 122 and the sub-slider 151 slide, the first support rod 47 slides along the first cam slot 130 and the second support rod 48 slides along the second cam slot 170 . As a result, the disk mounting portion 23 side turns with the third support rod 49 as a fulcrum to allow the bottom chassis 27 to rise and fall.

As shown in Figure 3, the upper push pin 10 that is used as the chuck unclamping device is formed on the lower surface of the bottom case 4, when the bottom lifting mechanism 150 makes the sub-frame 29 and the bottom frame 27 descend, the upper push pin 10 makes the The optical disk 2 on the turntable 23a of the disk loading section 23 is released from the turntable 23a. The push-up pin 10 is located near the disc mounting portion 23 of the bottom unit 22, protrudes upward from the lower surface of the bottom case 4 and passes through an insertion hole formed in the decorative sheet 30 exposed in the disc transfer area.

As shown schematically in FIG. 9 , the bottom unit 22 having such a structure ascends and descends in the arrow A direction and in the direction opposite to the arrow A. As shown in FIG. In this case, the bottom frame 27 is supported by the sub-frame 29 only through the shock absorbers 28 , and all paths through which vibrations from the outside are transmitted pass through the sub-frame 29 on which the shock absorbers 28 are mounted. Shock resistance is thus improved. The extra weight including the shock absorbers 28 is not applied to the bottom frame 27 . In other words, since the shock absorber is not provided, the total weight of the bottom frame 27 through which the impact is transmitted becomes light. Therefore, the impact resistance can be further improved.

When the main frame 6 is fixed to the bottom case 4, the main frame 6 is fixed via the shock absorber. Specifically, as shown in FIG. 10, a shock absorber 28 is provided between each guide 6f and the screw hole 4c of the bottom case 4 to fix the main frame 6 by a stepped screw.

In the bottom unit 22 thus fixed, as shown schematically in FIG. In this case, the bottom frame 27 is supported by the sub-frame 29 , which is supported by the main frame 6 , only via the shock absorbers 28 a - 28 c . The main frame 6 is fixed to the bottom case 4 via shock absorbers 28 . The path through which vibrations from the outside are transmitted passes through the main frame 6 on which the shock absorbers 28 are mounted and the sub-frame 29 on which the shock absorbers 28a-28c are mounted. Shock resistance is further improved since the vibration is transmitted via the shock absorber arranged in two stages.

A shock absorbing material 39 may be further disposed between the middle of the side plate portion 6 b of the main frame 6 and the bottom case 4 . The shock absorbing material 39 is composed of an elastic member such as a thin rubber sheet so as to block the path of shock transmission when the side plate portion 6b and the bottom case 4 are in direct contact with each other due to the vibration amplitude of the shock. An adhesive layer is formed on one side of the shock absorbing material 39 . The adhesive layer is adhered to the side plate portion 6 b of the main frame 6 .

As a result, even when the distance between the bottom case 4 and the main frame 6 is reduced and the main frame 6 is connected inside the bottom case 4 via the shock absorber 28, the side plate portion 6a of the main frame 6 is prevented from coming into contact with the bottom case 4 And the disturbance is transmitted to the main chassis 6 and the bottom chassis 22 via the contact portions.

As shown in FIGS. 12-19, the disk drive device 1 includes a disk transfer mechanism 50, which realizes the transfer of the optical disk 2 between the disk insertion and removal position and the disk installation position. , the optical disk 2 is inserted into/removed from the disk insertion and ejection opening 19, and in the disk mounting position, the optical disk 2 is mounted on the turntable 23a of the disk mounting portion 23.

The disc transfer device 50, as a supporting part that moves between the upper surface 6a of the main chassis 6 and the main surface opposite to the disc mounting cloth part 23 of the top plate part 5a, has The loading arm 51 and the ejection arm 52 of the swing support part; the loading cam plate 53 that transmits the driving force to the loading arm 51 from the drive mechanism 120 described later; the first link arm 54 that rotates the ejection arm 52 in the ejection direction of the optical disc 2 ; the second link arm 55 coupled to the first link arm 54; the helical tension spring 56 suspended between the first and second link arms 54, 55; the guide engaging the second link arm 55 the cam ring 57 that protrudes 13 and guides the second link arm 55;

In the disc transport mechanism 50, when the eject arm 52 is rotated to a predetermined position by inserting the optical disc 2, the first link arm 54 is rotated in one direction by the eject arm 52, and since the guide protrusion 113 formed at its front end Guided by the cam ring 57 , the second link arm 55 moves in a direction different from the rotational direction of the first link arm 54 . Therefore, when urged in the ejection direction by the coil tension spring 56, the ejection arm 52 rotates in the insertion direction. On the other hand, when the optical disk 2 is ejected, the guide protrusion 113 of the second link arm 55 is guided by the cam ring 57, and the first and second link arms 54, 55 are in close contact with each other. Therefore, the coil tension spring 56 is not stretched, and in a state where the urging force in the ejection direction does not work, the ejection arm 52 is rotated by the operation arm 58 via the first link arm 54 to eject the optical disk 2 .

As a result, when the optical disc 2 is inserted, the biasing force can act in the ejection direction by the coil tension spring 56 while the user inserts the optical disc 2 to a predetermined position. Therefore, it is possible to prevent the optical disc 2 from staying in a state in which the optical disc 2 is not fully inserted into the casing 3 because the insertion of the optical disc 2 is stopped by the user. When the optical disk 2 is ejected, the biasing force applied to the eject arm 52 in the eject direction by the coil tension spring 56 does not act. Therefore, the eject arm 52 is rotated according to the movement of the operation arm 58 which receives the driving force of the driving mechanism 120 . Therefore, the optical disc 2 can be stably ejected to a predetermined stop position without relying on the elastic force, and at this position, the central hole of the optical disc is ejected out of the casing 3 .

Each component of the disk transfer mechanism 50 will be described in detail below.

The loading arm 51 conveys the optical disc 2 to the disc mounting portion 23 . The base end portion of the loading arm 51 is rotatably supported on the platform portion 4a of the bottom case 4 and is closer to the disk insertion and ejection opening 19 side than the disk mounting portion 23, and its front end is along the direction of the arrow a1 and the arrow in FIG. The a2 direction is rotatably set. Specifically, the loading arm 51 is made of a flat sheet metal. The insertion portion 60 is protrudingly provided at one end thereof. The insertion portion 60 is engaged with the platform portion 4a, whereby the loading arm 51 is rotatably supported on the platform portion 4a in the arrow a1 direction and the arrow a2 direction in FIG. 12 .

In the loading arm 51, a contact portion 61 that comes into contact with the outer edge of the optical disc 2 inserted from the disc insertion and ejection opening 19 is provided at its front end to protrude upward. A small-diameter roller 61 a is rotatably mounted to the contact portion 61 . The contact portion 61 is made of a softer resin than the optical disc 2 . A central portion of the contact portion 61 that contacts the outer edge of the optical disc 2 inserted from the disc insertion and ejection opening 19 is bent inward. Since the flange portion has an increased diameter, its both ends restrict movement along the height direction of the optical disk 2 . Thus, the contact portion 61 has a substantially drum-like shape.

A locking piece 63 is formed in the loading arm 51 to ascend to approach the insertion portion 60 . The coil end of the coil spring 62 is locked to the right guide wall 97 . The other end of the coil spring 62 is locked to the locking piece 63 (see FIG. 6 ). As a result, the loading arm 51 is generally urged to rotate with the insertion portion 60 as a fulcrum in the arrow a1 direction of FIG.

Further, in the loading arm 51 is protrudingly provided an engaging projection 64 which penetrates and engages with a first cam groove 66 of the loading cam plate 53 which will be described later. Since the engaging protrusion 64 moves along the first cam groove 66 of the loading cam plate 52 , the loading arm 51 rotates while restraining the force exerted by the coil spring 62 .

The loading cam plate 53 that rotates the loading cam 51 is made of flat-shaped sheet metal. The loading cam plate 53 is engaged with a slider 122 of a driving mechanism 120 described later to move back and forth on the table portion 4 a as the slider 122 moves. The loading cam plate 53 is superimposed on the loading arm 51 supported on the platform portion 4 a, and the engaging projection 64 passes through the loading cam plate 53 . As a result, the loading cam plate 53 limits the rotation of the loading arm. As shown in FIG. 21 , in the loading arm plate 53 are formed: a first cam groove 66 into which the engagement protrusion 64 protrudingly provided in the loading arm 51 is inserted; a second cam groove 67 protrudingly provided The guide protrusion 65 in the platform portion 4a is inserted into the second cam groove 67; a pair of engaging protrusions 68 engaged with the slider 122.

The first cam groove 66 restricts the rotation of the loading arm 51 urged by the coil spring 62 in the loading direction of the optical disc 2 when the engaging protrusion 64 slides. The first cam groove 66 includes: a first guide portion 66a, which limits the engagement projection 64 to limit the rotation of the loading arm 51 in the arrow a1 direction of FIG. 12, which is the loading direction of the optical disc 2; The first guide portion 66a is formed adjacent to and continuously and rotates the loading arm 51 along the loading direction of the optical disk 2; and the third guide portion 66c is formed continuously with the second guide portion 66b and guides the engaging projection 64 so that the loading arm 51 is rotated in the direction of arrow a2 in FIG.

When the loading cam plate 53 moves backward inside the housing 3, the engaging protrusion 64 moves along the second guide portion 66b. Accordingly, the loading arm 51 biased by the coil spring 62 rotates in the direction of arrow a1 in FIG. When the optical disk 2 is mounted on the disk mounting portion 23, the engaging protrusion 64 moves along the third guide portion 66c. Accordingly, the loading arm 51 is rotated in the direction of arrow a2 in FIG. 16 against the urging force of the coil spring 62 and the contact portion 61 of the loading arm 51 is separated from the outer edge of the optical disc 2 to allow the optical disc 2 to rotate.

When the optical disk 2 is ejected, since the slider 122 moves forward, the loading cam plate 53 moves backward. The engaging protrusion 64 moves from the second guide portion 66b to the first guide portion 66a and the loading arm 51 turns in the direction of arrow a1 in FIGS. 18 and 19 to come into contact with the optical disk 2 . In this case, the optical disk 2 is ejected when pressed in the ejecting direction by the ejecting arm 52 which is subjected to the driving force of the driving mechanism 120 and is urged in the inserting direction by the loading arm 51 which The arm 51 is biased by a coil spring 62 . As a result, when the optical disc 2 is ejected, the disc transfer mechanism 50 pushes the optical disc 2 outward to a predetermined ejection position while the optical disc 2 is clamped by the loading arm 51 and the ejecting arm 52 . The loading arm 51 prevents the optical disk 2 from being ejected suddenly.

When the ejection of the optical disc 2 is finished, the engaging protrusion 64 is locked by the protrusion 69 formed in the first cam groove 66 of the loading cam plate 53 . Therefore, the rotation of the loading arm 51 in the a1 direction is restricted and the loading arm 51 is held at a position withdrawn from the disk transfer area to wait for the insertion of the optical disk 2 .

The second cam groove 67 passes through the guide protrusion 65 protrudingly provided in the platform portion 4 a to guide the movement of the loading cam plate 53 . The second cam groove 67 is a linear cam groove parallel to the moving direction of the slider 122 . Since the guide protrusion 65 slides with the movement of the slider 122 , the second cam groove 67 guides the loading cam plate 53 in the moving direction of the slider 122 .

A pair of protrusions 68 that engage with the slider 122 are formed at one side of the loading cam plate 53 at intervals from each other. The engaging projection 68 is protrudingly provided downward and extends to the lower surface side of the bottom case 4 so as to engage with the engaging recess 127 of the slider 122 provided along the sides of the bottom case 4 . As a result, the loading cam plate 53 and the slider 122 are integrated and the loading cam plate 53 slides as the slider 122 moves.

The other side on the side opposite to the side on which each engaging protrusion 68 is formed slides through a gap provided between the right guide wall 57 and the platform portion 4a. Therefore, the loading cam plate 53 can be prevented from rising from the platform portion 4a.

The eject arm 52 that ejects the optical disk 2 from the disk mounting portion 23 to the disk insertion and ejection opening 19 is provided on the side opposite to the side on which the loading arm 51 is formed and further than the disk mounting portion 23. Close to the rear surface side of the casing 3 . When operated by the first and second link arms 54, 55 and the operation arm 58 described later, the eject arm 52 conveys the optical disk 2 to the disk mounting portion 23 side in the direction of arrow b1 in FIG. Eject to the side of the disk insertion and ejection opening 19 and rotate in the direction of arrow b2 in FIG. 12 . As shown in Figure 22, the ejection arm 52 includes: a rotation support portion 71 rotatably supported by the main chassis 6; a push-out arm 72 rotatably engaged in the rotation support portion 71 and pushing out the optical disc 2; a coil spring 73 biased by the eject arm 72 ;

The rotation support portion 71 is made of a substantially circular sheet metal and is rotatably mounted on the opposite side of the upper surface 6a of the main chassis 6 from the disk transfer area. A mounting opening 71 b for mounting the rotating supporting portion 71 to the main frame 6 is drilled at substantially the center of the main surface 71 a of the rotating supporting portion 71 . In the rotation bearing portion 71, a convex-shaped sliding contact portion 75 that makes sliding contact with the main frame 6 forms an expanded shape on the main surface 71a. Since the sliding contact portion 75 comes into sliding contact with the main frame 6, the rotation support portion 71 rotates smoothly.

An engaging piece 76 that engages with the push-out arm 72 and the coil spring 73 is formed in the rotation bearing portion 71 . The engaging piece 76 is bent from the front end of a vertical wall 76a which is vertically arranged from the main surface 71a so that the engaging piece 76 is arranged above the main surface 71a and from the opening of the eject arm 6d of the main chassis 6 to the upper surface side 6a. raised. Formed in the engagement piece 76 are: a cylindrical engagement portion 77, which passes through the opening 85 of the push-out arm 72 and through which the coil spring 73 is inserted; A locking member 89 engages to limit the rotation of the ejection arm 72; and a locking notch 79 which locks one arm 73c of the coil spring 73 in place.

In the rotation bearing portion 71, an engaging hole 80 that is rotatably engaged with a first link arm 54 described later is formed in the main surface 71a. In the rotation bearing portion 71, a bent piece 81 is formed from one side of the main surface 71a. The bent piece 81 is bent downward from the main surface 71 a to form an abutment piece that abuts against the sub-slider 151 of the bottom lift mechanism 150 described later. When the bending piece 81 rotates along the arrow b1 direction in FIG. 12 , along with the insertion of the optical disc 2 , the optical disk 2 is transported to the side of the disk mounting part 23 along the arrow b1 direction, and the bending piece 81 is conductively mounted on the circuit board 59 The first switch SW1. As a result, the disc drive device 1 can detect the rotation of the eject arm 52 pressed by the optical disc 2 to the rear surface side of the casing 2 and obtain timing for driving the drive mechanism 120 .

The push-out arm 72 rotatably engaged with the engaging piece 76 is made of flat sheet metal. One end of the push-out arm 72 is formed with: an opening 85 through which the engaging portion 77 of the engaging piece 76 is inserted and engaged; the first to third locking tabs 86-88 of the locking coil spring 73; The locking piece 89 that the rotation limiting portion 78 locks; the pressing piece 90 that presses the left guide wall 96, which guides the center of the optical disc 2 and separates the left guide wall 96 from the optical disc 2; Install part 91. The engagement portion 77 of the rotation support portion 71 passes through the opening 85 , whereby the ejection arm 72 is rotatably engaged with the rotation support portion 71 . First and second locking tabs 86 , 87 vertically disposed about the opening 85 are inserted into the cylindrical portion 73a of the coil spring 73 to hold the coil spring 73 in place. The other arm 73 c of the coil spring 73 is locked in the locking notch 79 of the rotation bearing portion 71 . As a result, the eject arm 72 is biased with the rotation support portion 71 as a fulcrum to rotate to the disk insertion and ejection opening 19 side by a predetermined elastic force.

The locking piece 89 is bent downward from the vicinity of the opening 85 . As the eject arm 72 rotates, the lock piece 89 comes into contact with the rotation restricting portion 78 of the rotation supporting portion 71 to restrict the rotation of the eject arm 72 biased toward the disc insertion and ejection opening 19 side. The pressing member 90 applies force to the transfer area of the optical disc 2 and presses the left guide wall 96 guiding the center of the optical disc 2 to withdraw the left guide wall 96 from the optical disc 2 to rotate the left guide wall 96 during recording and/or reproduction.

The contact portion 74 mounted to the mounting portion 91 of the ejection arm 72 is formed of resin injection molding softer than the optical disk 2 . The contact portion 74 has: a concave disk accommodating portion 74a, which contacts the outer edge of the optical disk 2; an insertion hole 74b, through which the mounting portion 91 of the ejection arm 72 is inserted; and a restricting portion 74c, which acts as a small-diameter disk. Insertion of the small-diameter disk into the housing 3 is restricted when it is inserted by mistake. The mounting portion 91 passes through the insertion hole 74b, whereby the contact portion 74 is integrally formed with the ejection arm 72 . A stopper 100 for preventing wrong insertion of the small-diameter optical disc 101 may be formed in the contact portion 74 . The stopper 100 will be described in detail later.

In this eject arm 52 , the rotation bearing portion 71 and the eject arm 72 are rotatably engaged with each other and the eject arm 72 is urged by a predetermined elastic force of the coil spring 73 to rotate to the disk insertion and eject opening 19 side. Therefore, the eject arm 52 is operated to rotate in the direction of arrow b2 in FIG. Even if a force in the direction of the arrow b1 acts on the eject arm 52 due to, for example, an obstacle in the transfer area of the optical disc 2, the eject arm 72, which is subjected to a force in the direction opposite to the direction in which the optical disc 2 is ejected, overcomes the force applied by the coil spring 73 to The engaging portion 77 of the rotation support portion 71 serves as a fulcrum for rotation in the direction of the arrow b1. As a result, the driving force to rotate the eject arm 52 in the b2 direction and the force acting in the direction opposite to the driving direction are prevented from opposing each other. Therefore, no additional load is applied to the motor or the like as the drive mechanism 120 that drives the first link arm 54 and the operation arm 58 to rotate the eject arm 52 in the direction of arrow b2 in FIG. 19 . The optical disc 2 is held by the force exerted by the eject arm 52 in the eject direction and by the force acting in the opposite direction. Therefore, the optical disc 2 can be prevented from breaking.

The first link arm 54 rotatably engaged with the rotation support portion 71 of the eject arm 52 is operated by an operation arm 58 to be described later so that the eject arm 52 is inserted in the direction of the optical disk 2 or in the direction of the arrow b1 or the direction of the arrow b2 in FIG. eject direction) turn. The first link arm 54 is formed from a substantially rectangular metal plate. One end thereof in the longitudinal direction is rotatably engaged with the engaging hole 80 of the rotation support portion 71 , and the other end in the longitudinal direction is rotatably engaged with the second link arm 55 . The other end of the biasing coil spring 93, the other end 58b of the operating arm 58, and one end of the helical tension spring 56 suspended between the first link arm 54 and the second link arm 55 are connected at substantially the center in the longitudinal direction. .

One end of the urging coil spring 93 is locked to a locking portion provided on the upper surface 6 a of the main chassis 6 . The other end of the biasing coil spring 93 is connected to substantially the center of the first link arm 54 . As a result, the urging coil spring 93 raises the first and second link arms 54 , 55 in the direction p1 in FIG. 12 and rotates the guide protrusion 113 of the second link arm 55 to the cam ring 57 .

The second link arm 55 rotatably engaged with the other end of the first link arm 54 is made of elongated thin sheet metal. A guide protrusion 113 is protrudingly provided at one end of the link arm 55 . The guide protrusion 113 is protrudingly provided toward and engaged with the guide groove 114 of the cam ring 57, thereby being guided to the loading guide wall 112a and the ejection guide wall 112b, and controls the first link arm 54 and the second link arm The distance between 55. The elastic lock piece 55 a is provided in the middle of the second link arm 55 in the longitudinal direction. One end of the helical tension spring 56 suspended between the first link arm 55 and the first link arm 54 is locked to the spring lock 55a.

In the second link arm 55 is formed an engagement projection 116 which engages with a cam groove 108 formed in the operation arm 58 described later. In the disk transfer mechanism 50, since the engaging protrusion 116 is engaged with the cam groove 108, the second link arm 55 can make the ejection arm 52 rotate following the movement of the slider 122, and can stably eject the optical disk 2 to a predetermined position. popup position.

During the ejection of the optical disk 2, when the panel curtain provided in the disk insertion and ejection opening 19 of the front panel 18 comes into sliding contact with the optical disk 2 to apply a load to the optical disk 2, the supporting portion 71 of the ejection arm 52 and the second A link arm 54 exerts force in the b1 direction. If the second link arm 55 and the operating arm 58 are not engaged, even if the operating arm 58 moves in the direction f2 following the sliding of the slider 122, the first link arm 54 will simply move in the direction d2 using the engaging hole 80 as a fulcrum. Rotate with respect to the rotation support portion 71 . It is difficult to rotate the eject arm 52 in the b2 direction. The second link arm 55 also simply rotates relative to the first link arm 54 .

On the other hand, when the second link arm 55 and the operating arm 58 are engaged, the engaging projection 116 comes into contact with the side wall of the cam groove 108 as the operating arm 58 slides in the d2 direction. It is difficult to freely rotate the second link arm 55 relative to the first link arm 54 . Since the engaging projection 116 of the second link arm 55 comes into contact with the side wall of the cam groove 108, the rotation of the first link arm 54 in the direction d2 is restricted. Therefore, even if a force is applied to the eject arm 52 in the b1 direction during the ejection of the optical disc 2, when the operation arm 58 moves in the d2 direction, the first link arm 54 can move in the d2 direction against the force applied in the b1 direction and The eject arm 52 is rotated in the b2 direction. As a result, the ejection arm 52 can be rotated in the b2 direction corresponding to the sliding amount of the slider 122 in the f2 direction, and the ejection arm 52 can safely eject the optical disk 2 to a predetermined ejection position.

As described above, the cam ring 57 that guides the movement of the guide protrusion 113 of the second link arm 55 is locked in the locking hole drilled in the upper surface 6 a of the main chassis 6 . A substantially ring-shaped cam wall 112 is vertically provided towards the side of the bottom case 4 . The guide protrusion 113 of the second link arm 55 rotates around the cam wall 112 during loading to ejection of the optical disk 2 . The cam wall 112 is formed with: a loading guide wall 112a on which the guide protrusion 113 slides when the optical disc 2 is loaded; an ejection guide wall 112b on which the guide protrusion 113 slides when the optical disc 2 is ejected; and a protrusion 112c , which prevents the reverse movement of the cam 113 between the loading guide wall 112a and the ejection guide wall 112b. A guide groove 114 through which the guide protrusion 113 moves is formed by surrounding the guide walls 112a, 112b and the protrusion 112c with the outer edge portion 112d.

The operating cam 58 coupled to the first link arm 54 and the driving mechanism 120 and operating the eject arm 52 is formed of an elongated metal plate. At the center in the longitudinal direction of the operation arm 58 is formed a cam groove 108 through which the engaging protrusion 116 formed on the second link arm 55 is inserted. One end 58 a of the operating arm 58 in the longitudinal direction is engaged with a third link arm 94 coupled to the slider 122 of the drive mechanism 120 . Its other end 58b engages with the first link arm 54 .

As described above, the cam groove 108 is engaged with the engaging protrusion 116 of the second link arm 55 to rotate the eject arm 52 according to the sliding operation of the slider 122 . The cam groove 108 is formed in the shape of an elongated hole to move the engaging protrusion 116 when the second link arm 55 rotates around the cam ring 57 . The cam groove 108 is formed in a direction substantially perpendicular to the arrow d1 direction and the arrow d2 direction of FIG. 12 , which is the moving direction of the operating arm 58 . As a result, since the engaging projection 116 comes into contact with the side wall of the cam groove 108, the cam groove 108 can restrict the rotation of the second link arm 55 and restrict the rotation of the first link arm 54 in the d2 direction.

Since the slider 122 is operated to slide, the operating arm 58 moves in the arrow d1 direction and the arrow d2 direction of FIG. The arm 52 rotates. Specifically, when the operating arm 58 is moved in the direction of arrow d1 in FIG. Rotate in the direction of arrow b1, which is the direction in which the optical disc 2 is inserted. When the operating arm 58 moves in the arrow d2 direction in FIG. Move, this direction is the ejection direction of disc 2.

The third link arm 94 rotatably engaged with the one end 58a of the operating arm 58 is made of a substantially L-shaped metal plate. Since the bent portion 94a is rotatably connected to the main chassis 6, the third link arm 94 is supported to freely rotate in the directions of arrow c1 and arrow c2 in FIG. 12 . The engaging projection 109 formed at the end 94b extending from the bent portion 94a is engaged with the slider 122 . The other end 94c is rotatably engaged with the operating arm 58 . As a result, when the slider 122 is subjected to the driving force of the driving motor 121 of the driving mechanism 120 and is transmitted along the arrow f1 direction in FIG. 12 , the third link arm 94 is guided by the first guide groove 125 formed in the slider 122 And rotate in the direction of arrow c1 in FIG. 12 to move the operating arm 58 in the direction of arrow d1 in the figure. When the slider 122 is conveyed in the direction of arrow f2 in FIG. 12 , the third link arm 94 is guided by the first guide groove 125 and rotates in the direction of arrow c2 in the figure to move the operating arm 58 in the direction of arrow d2 in the figure.

The left/right guide walls 96, 97 provided on the left and right sides of the disc transfer area are centered and guided when the side of the disc 2 is slid. The guide walls 96 and 97 are formed of a material softer than the optical disk 2, such as synthetic resin. The right guide wall 97 is provided on the platform portion 4 a and the left guide wall 96 is provided on the main frame 6 . The guide walls 96, 97 are fixed by screws, adhesive tape, or the like.

Arc-shaped side walls 96 a , 97 a corresponding to the shape of the optical disk 2 are vertically provided on the left and right guide walls 96 , 97 . The side walls 96a, 97a are provided at positions where they form a predetermined gap with the side of the optical disc 2 conveyed to the center position and do not contact the optical disc 2 when the optical disc 2 is driven and rotated. Make contact. The front end on the opposite side of the disk insertion and ejection opening 19 of the side wall 96a formed in the left guide wall 96 is provided so as to be swingably formed in the center of the disk transfer area and outside the disc transfer area by the hinge portion 98. Guide 99. The centering guide 99 is urged by the leaf spring 95 warped toward the disc transfer area side to bring the side of the optical disk 2 into contact with the centering guide 99 . As a result, the optical disc 2 is urged by the centering guide 99 in the centering direction. When the optical disc 2 is inserted into the case and the eject arm 52 is rotated in the b1 direction, the centering guide 99 is pressed by the pressing piece 90 formed in the pressing arm 72 to be conveyed from the disc during recording and reproducing operations. The zone retracts and remains in position away from the sides of the disc 2 .

Next, the operation of insertion to ejection of the optical disc 2 realized by the disc transfer mechanism 50 constructed as described above will be described. The conveying state of the optical disc 2 is monitored by detecting the depressed states of the first to fourth switches SW1 - SW4 mounted on the circuit board 59 . As shown in FIG. 23 , the first switch SW is provided in the turning region of the turning support portion 71 of the eject arm 52 . Along with the rotation of the pop-up arm 52, when the first switch SW1 is released or pressed by the rotation supporting portion 71, the first switch SW1 is switched to H or L (in this state, pressing the switch is represented as L, and not pressing The lower switch is indicated as H). As shown in FIG. 23 , second to fourth switches SW2 - SW4 are provided on the moving area of the slider 122 . As the slider 122 slides in the f1 direction or the f2 direction, the second to fourth switches SW2-SW4 are sequentially switched to H or L.

The disk drive device 1 monitors the depressed state and the number of times of depression of the first to fourth switches SW1-SW4 to monitor the conveying state of the optical disk 2 and start the drive motor 121, the spindle motor 24a, the displacement drive mechanism 36, and the optical pickup 25. wait. Specifically, the disk drive device 1 detects the conveyance state of the optical disk 2 and outputs timings of various motors according to timing charts shown in FIGS. 24 and 25 .

Before inserting the optical disk 2, as shown in FIG. 12, the slider 122 slides in the direction of arrow f2 on the side of the disk insertion and ejection opening 19. As a result, in the loading arm 51, the engaging projection 64 is locked to the projection 69 of the loading cam plate 53 and the contact portion 61 is rotated and held in a position retracted from the transfer area of the optical disk 2. The third link arm 94 engaged with the slider 122 rotates in the direction of arrow c2 in FIG. 12 . As a result, the eject arm 52 , which is operated and rotated by the operating arm 58 and the first link arm 54 , is urged to rotate in the direction of arrow b2 in FIG. 12 . Since the slider 122 slides in the direction f2, the auxiliary slider 151 slides in the direction of the arrow h2 in the figure. As a result, the sub-chassis 29 constituting the bottom unit 22 descends to the bottom case 4 side and withdraws from the transfer area of the optical disc 2 .

When the optical disc 2 is inserted from the disc insertion and ejection opening 19, the contact portion 61 of the ejection arm 52 is pressed against the insertion end surface of the optical disc 2, as shown in FIG. In this case, since the rotation support portion 71 is rotated in the b1 direction with the mounting opening 71b as a fulcrum, one end of the first link arm 54 engaged with the rotation support portion 51 also moves to the left guide wall 96 side. On the other hand, in the second link arm 55 engaged with the first link arm 54, the guide protrusion 113 engaged with the guide groove 114 of the cam ring 57 moves along the loading guide wall 112a. Since the loading guide wall 112 a of the cam ring 57 extends to the right guide wall 97 side, the second link arm 55 is guided by the loading guide wall 112 a to be separated from the first link arm 54 . Therefore, since the helical tension spring 56 suspended between the first link arm 54 and the second link arm 55 is extended, the first link arm 54 and the second link arm 54 are moved toward each other in the direction of bringing the link arms closer to each other. The link arm 55 exerts force. Since the guide protrusion 113 is in contact with the loading guide wall 112a, the force acting on the elastic lock piece 55a of the second link arm 55, that is, the force applied in the direction opposite to the rotation direction of the rotation support portion 71 is applied to the first load. on the link arm 54. Therefore, force is applied to the eject arm 52 in the direction of arrow b2 in FIG. 13 , which is the direction in which the optical disc 2 is ejected.

Therefore, the optical disc 2 is inserted while overcoming the force applied to the eject arm 52 in the eject direction. Therefore, even when the user aborts the insertion of the optical disk 2, since the optical disk is pushed to the outside of the casing 3, the optical disk 2 can be prevented from remaining in the casing 3 in an unfinished state.

When the user inserts the optical disc 2 while overcoming the applied force and the ejection arm 52 is rotated to a predetermined angle, the first switch SW1 provided on the circuit board 59 is pressed by the bent piece 81 of the rotation supporting portion 71 and activates the drive mechanism 120 . In this case, the depressed states of the first to fourth switches SW1-SW4 are L, H, H, and H in order, and are detected by the microcomputer of the disc drive device 1 (in this state, the depressed state The switch is denoted L without depressing the switch denoted H). In the driving mechanism 120 , the slider 122 is driven by the driving motor 121 and slides in the direction of arrow f1 in FIG. 14 . As a result, the loading cam plate 53 also slides in the same direction together with the slider 122 . Therefore, the loading arm 51 , which is restricted by the rotation of the first cam groove 66 , is urged by the coil spring 62 to rotate in the direction of arrow a1 in FIG.

When the eject arm 52 rotates to the start position of the driving mechanism 120, the guide protrusion 113 of the second link arm 55 moves from the loading guide wall 112a of the cam ring 57 to the eject guide wall 112b. Therefore, the first link arm 54 and the second link arm 55 approach each other and contract the coil spring 56 . Therefore, the application force applied to the eject arm 52 in the b2 direction stops working. When the first link arm 54 is urged in the p1 direction by the third link arm 93, the second link arm 55 moves in the same direction. Therefore, the guide protrusion 113 moves from the loading guide wall 112a to the ejection guide wall 112b side and is located near the protrusion 112c.

When the slider 122 further slides in the f1 direction, as shown in FIG. 15, the engaging protrusion 64 moves in the first cam groove 66 of the loading cam plate 53 from the first guide portion 66a to the second guide portion 66b. Corresponding to this movement, the loading arm 51 rotates in the direction of arrow a1 in the figure. Thus, the optical disc 2 is conveyed onto the disc mounting portion 23 . In this case, since the depressed states of the first to fourth switches SW1-SW4 are detected as L, H, L, and H in sequence, the bottom unit 22 descends to the chuck release position. It becomes possible to securely transfer the optical disc 2 .

The optical disk 2 is loaded by the loading arm 51 , guided by the left and right guide walls 96 , 97 , and brought into contact with a stopper lever 140 described later so as to be centered on the disk mounting portion 23 .

The third link arm 94 is guided by the first guide groove 125 of the slider 122 and rotates in the direction of arrow c1 in FIG. 15 . The operation arm 58 engaged with the third link arm 94 moves in the direction of arrow d1 in the figure. Accordingly, the first link arm 54 engaged with the other end 58b of the operating arm 58 is pressed by the operating arm 58 and further moved to the left guide wall 96 side. Since the first link arm 54 is moved by the operation arm 58, the rotation support portion 71 is rotated in the direction of arrow b1 in the figure. Therefore, the ejection arm 72 turns in the same direction. In this case, the pressing piece 90 formed on the ejection arm 72 presses the centering guide 99 of the left guide wall 96 extending from the disc transfer area, thereby separating the centering guide 99 from the side of the disc.

In this situation, since the engaging arm 165 engaged with the slider 122 rotates, the sub-slider 151 slides in the direction of arrow h1 in the figure and the bottom unit 22 is lifted to the latching position. As a result, the optical disc 2 transferred to the center position is clamped on the turntable 23a by the edge of the central hole 2a engaged by the turntable 23a and the contact protrusion 8 formed around the opening 7 of the top plate portion 5a.

In this way, since the depressed states of the first to fourth switches SW1-SW4 are detected as L, L, H and H in sequence, the bottom unit 22 is lifted to the clamping position and the optical disc 2 is clamped on the turntable 23a. During loading of the optical disc 2 in the disc drive device 1, so-called double loading is performed. In double clamping, when the optical disc 2 is clamped on the turntable 23a, the spindle motor 24a is driven to rotate the optical disc 2 half a circle, and the driving motor 121 reverses so that the bottom unit 22 rises to the clamping position again (see FIG. 24 ). Thus, when the optical disc 2 is not fully engaged with the turntable 23a, recording and reproduction can be prevented.

When the slider 122 further slides along the f1 direction, since the engaging projection 64 moves from the second guide portion 66b of the loading cam plate 53 to the third guide portion 65c, the loading cam 51 rotates in the arrow a2 direction in FIG. 16 and contacts the portion 61 is separated from the side of the optical disc 2.

When the slider 122 is further moved along the f1 direction and the sub-slider 151 is further moved along the h1 direction, the bottom unit 22 descends from the clamping position to the recording and reproducing position, waiting for the user to perform a recording or reproducing operation. As shown in FIG. 16 , the head end of the sub-slider 151 abuts against the bent piece 81 of the rotation support portion 71 . As a result, the rotation support portion 71 is further rotated in the direction of the arrow b1 in the figure, while extending the urging coil spring 93 . Therefore, the contact portion 74 of the eject arm 52 and the disc 2 in the center are separated from each other. Since the first link arm 54 moves together with the rotation support portion 71 and is urged in the p1 direction by the biasing coil spring 93, in the second link arm 55 engaged with the first link arm 54, the guide projection 113 Climbs on the projection 112c that prevents reverse movement to the side of the loading guide wall 112a, thereby moving toward the ejection guide wall 112b.

As shown in FIG. 16 , the slider 122 presses the stop lever 140 that centers the optical disc 2 to separate the stop lever 140 from the side of the optical disc 2 . As a result, the optical disk 2 is separated from the centering guide 99 of the loading arm 51, the eject arm 52, the stopper lever 140 and the left guide wall 96 which center the optical disk 2, thereby being held by the disk rotation driving mechanism on the turntable 23a in a free state. 24 drives and thus turns.

In this case, since it is detected that the depressed states of the first to fourth switches SW1-SW4 are L, L, L, and H in order, it can be understood that the bottom unit 22 descends to the recording and reproducing position and can Drive to rotate disc 2.

When the recording and reproducing operations are finished and the ejection operation of the optical disc 2 is performed by the user, first, the drive motor 121 of the drive mechanism 120 is reversed and the slider 122 slides in the direction of arrow f2 in FIG. 17 . As a result, since the engaging protrusion 64 moves from the third guide portion 66c to the second guide portion 66b of the loading cam plate 53, the loading cam 51 rotates in the arrow a1 direction in FIG.

The sub-slider 151 slides in the direction of the arrow h2 in the figure, and the pressing on the rotation support portion 71 is released. Accordingly, the eject arm 52 is rotated in the direction of the arrow b2 in the figure by the force of the urging coil spring 93, and the contact portion 74 comes into contact with the side surface of the optical disk 2. Since the first link arm 54 engaged with the rotation support portion 71 is moved in the d1 direction by the operation arm 58 and the urging coil spring 93 is contracted, the ejection arm 52 is only rotated to a position where it comes into contact with the optical disc 2 and ejection of the optical disc 2 does not occur. force.

When the slider 122 further slides along the f2 direction, the sub-slider 151 slides along the arrow h2 direction in the figure to lower the bottom unit 22 . As a result, the optical disk 2 is pushed upward by the push-up pin 10 vertically arranged from the bottom case 4 to release the chucked state with the turntable 23a.

In this case, since it is detected that the depressed states of the first to fourth switches SW1-SW4 are L, H, L, and H in sequence, it can be understood that the bottom unit 22 descends to the snap release position and can Safely eject disc 2.

Thereafter, when the third link arm 94 engaged with the slider 122 is rotated in the direction of arrow c2 in FIG. 18 by sliding the first guide groove 125 of the slider 122, the operating arm 58 moves in the direction of arrow d2 in the figure. As shown in FIGS. 18 and 19, when the first link arm 54 moves in the same direction as the operating arm 58 moves in the d2 direction, the ejection arm 52 moves along the arrow b2 in FIG. 18 according to the amount of movement of the operating arm 58. direction to eject disc 2.

In this state, the loading arm 51 pushed in the direction of arrow a1 in FIG. Since the engaging protrusion 64 is engaged with the first cam groove 66 of the loading cam plate 53, the loading arm 51 is allowed to rotate along with the sliding of the loading cam plate 53, and its free rotation is restricted. When the loading cam plate 53 slides together with the slider 122 in the direction of arrow f2 in FIG. 19 , the loading arm 51 rotates in the direction of arrow a2 in the figure while overcoming the force exerted by the coil spring 62 . Therefore, no force is applied to prevent the ejection of the optical disc 2 . Since the optical disc 2 is ejected while being held by the loading arm 51 and the ejection arm 52, the optical disc 2 can be prevented from being ejected suddenly.

Since the first link arm 54 is moved in the d2 direction by the operating arm 58 , in the second link arm 55 , the guide protrusion 113 slides on the ejection guide wall 112 b of the cam ring 57 . In this case, since the first link arm 54 and the second link arm 55 are moved in the same direction by the operation arm 58, the coil tension spring 56 is not extended. In other words, during the insertion of the optical disc 2, the moving direction of the first link arm 54 when the eject arm 52 moves in the b1 direction is the same as the second linking direction when the guide protrusion 113 is guided by the loading guide wall 112a of the cam ring 57. The direction of movement of the lever arm 55 is reversed. The first link arm 54 and the second link arm 55 are separated from each other. Thereby, the helical tension spring 56 is extended and a force applied in the ejection direction acts on the ejection arm 52 . However, when the optical disc 2 is ejected, the guide protrusion 113 of the second link arm 55 is guided in the same direction as the direction in which the first link arm 54 is moved by the ejection guide wall 112b. The first link arm 54 and the second link arm 55 therefore do not move apart from each other. Therefore, the helical tension spring 56 is not stretched, and the eject arm 52 is rotated in the eject direction by the driving force of the drive mechanism 120 without being urged in the eject direction.

In this case, in the disc transfer mechanism 50, since the optical disc 2 is in sliding contact with the panel curtain provided in the disc insertion and ejection opening 19 of the front panel 18, relatively a force applied in the b1 direction acts on the ejection arm. 52 and the first link arm 54. In this case, as described above, the second engaging projection 116 comes into contact with the side wall of the cam groove 108 of the operating cam 58 to restrict the rotation of the first link arm 54 in the d2 direction. Therefore, as the operation arm 58 moves in the d2 direction by an amount corresponding to the sliding amount of the slider 122 in the f2 direction, the first link arm 54 and the eject arm 52 rotate. Therefore, the disc transport mechanism 50 can rotate the eject arm 52 by an amount corresponding to the sliding operation of the slider 122 against the force applied in the b1 direction, and stably eject the optical disc 2 to a predetermined eject position.

As shown in FIG. 20, when the slider 122 moves to the original position, the sliding operation stops due to the depression of the detection switch. As the sliding operation stops, the eject arm 52 is rotated to the original position by the operating arm 58 and the first link arm 54, so that the optical disc 2 is stopped at a position where the central hole 2a is inserted and ejected from the disc opening. 19 pop up. In the loading arm 51 , the engaging protrusion 64 is locked to the protrusion 69 formed in the first cam groove 66 of the loading cam plate 53 , and the contact portion 61 is withdrawn from the transfer area of the optical disc 2 .

In this case, since the depressed states of the first to fourth switches SW1-SW4 are H, H, H, and H in sequence, it can be understood that the optical disc 2 is ejected to the predetermined ejection position by the ejection arm 52, and the driving motor is stopped. 121 drive.

In a state where the optical disc 2 is inserted by a predetermined amount and the drive of the drive motor 121 is started, when the user notices that the inserted optical disc 2 is wrong and quickly holds the optical disc 2, the disc transfer mechanism 50 stops the drive motor 121 and then enables The driving motor 121 is reversely driven to eject the optical disk 2 .

Specifically, as shown in FIG. 26, when the optical disc 2 is inserted into a predetermined amount from the disc insertion and ejection opening 19 and the driving motor 121 is activated, along with the movement of the slider 122 and the loading cam plate 53 in the f1 direction, the loading arm 51 to rotate in the direction of arrow a1 in the figure. When the optical disk 2 is held by the user, the rotation of the loading arm 51 is restricted, and on the other hand, the loading cam plate 53 slides in the f1 direction together with the slider 12 . Accordingly, the engaging projection 64 protrudingly provided in the loading arm 51 is locked to the front end of the first guide portion 66 a of the loading cam plate 53 . As a result, the sliding of the slider 122 in the f1 direction is restricted and the driving of the driving motor 121 is stopped. When a predetermined time elapses in this state, the drive motor 121 is driven to reverse and the optical disc 2 is ejected in the reverse procedure of the above-described insertion of the optical disc 2 .

In this case, since the eject arm 52 rotates by a predetermined amount when the optical disc 2 is inserted by a predetermined amount, the first and second link arms 54, 55 move in directions to separate the link arms from each other. A helical tension spring 56 suspended between the first and second link arms 54, 55 is extended. Therefore, the drive motor 121 is driven in reverse. When the sliding of the slider 122 in the direction f2 ends, the first link arm 54 biased by the helical tension spring 56 rotates, and the ejection arm 52 rotates in the direction of arrow b2 in FIG. 26 . Therefore, in the disk drive device 1, the eject arm 52 is urged to rotate in the direction of arrow b1 in FIG. The applied force of the tight spring 56 ejects the optical disk 2 . It is thus possible to prevent a situation where the drive of the drive motor 121 is stopped due to the disc being held when the disc 2 is loaded and the disc 2 is not fully exposed to the disc insertion and ejection opening 19.

Abnormal transport of the optical disc 2 can be detected by monitoring the depressed states of the first to fourth switches SW1-SW4 mounted on the circuit board 59 with a microcomputer. As shown in FIG. 24 , the time elapsed when the slider 122 moves from the state where the first switch SW1 is depressed by the eject arm 52 until it is detected that the lowering of the bottom unit 22 to the latching release position (LHHH to LHLH) is equal to or greater than a predetermined time (for example, 3 seconds) or when the time until the base unit 22 passes the chucking position from the chucking release position and moves to the recording and reproduction position (LHLH to LLLH) is equal to or longer than a predetermined time, it can be detected that abnormal transfer is performed. The driving motor 121 is stopped or reversed to eject the optical disk 2 .

When an obstacle such as a book is placed in front of the disk insertion and ejection opening 19 when the optical disk 2 is ejected, the optical disk 2 comes into contact with the obstacle and it becomes difficult to eject the optical disk 2 . As a result, an additional additional load acts on the driving motor 121 of the driving mechanism 120 . When the optical disc 2 is gripped by the obstacle by the eject arm 52 which is rotated by the driving force of the drive motor 121, an additional load is also applied to the optical disc 2.

In this disk drive apparatus 1, the rotation support portion 71 of the eject arm 52 is engaged with the eject arm 72 to freely rotate in the b1 direction with the engaging portion 77 as a fulcrum and is biased in the b2 direction by a predetermined force provided by the coil spring 73 . Therefore, when the optical disc 2 is ejected, even if there is an obstacle preventing the ejection of the optical disc 2 and a force in the direction opposite to the direction in which the optical disc 2 is ejected is applied to the ejection arm 52, since the ejection arm 72 rotated in the b1 direction due to being subjected to the opposite direction force, Therefore, an extra load can be prevented from being applied to the driving motor 121 and the optical disk 2 .

When the eject arm 72 of the eject arm 52 is rotated in the b1 direction, the disk drive device 1 stops the drive of the drive motor 121 . When an obstacle is located in front of the disk insertion and ejection opening 19 and the state in which the ejection of the optical disk 2 is hindered continues for a predetermined time, the disk drive device 1 pushes the optical disk 2 into the loading position again. As shown in FIG. 27, if the optical disk 2 is ejected to the outside from the disk insertion and ejection opening 19 and one side of the optical disk 2 contacts an obstacle to stop the ejection of the optical disk 2 for a predetermined time, the drive motor 121 is reversed. Therefore, the first and second link arms 54, 55 and the operation arm 58 move in reverse to the above-mentioned process to perform the loading operation of the optical disc 2. As shown in FIG. In this case, as in the case described above, the first and second link arms 54, 55 do not move apart from each other. Therefore, the helical tension spring 56 is not stretched and the force applied in the ejection direction does not act on the ejection arm 52 .

As a result, the disc drive device 1 can prevent the disc 2 from staying in a state where the disc 2 is sandwiched between the eject lever 52 rotating in the eject direction and the obstacle, and can prevent an additional load from being applied to the drive motor 121 and the disc 2 .

Abnormal transport of the optical disc 2 can be detected by monitoring the depressed states of the first to fourth switches SW1-SW4 mounted on the circuit board 59 with a microcomputer. As shown in FIG. 25, after the drive motor 121 is reversed, the time elapsed when the slider 122 moves until the bottom unit 22 descends from the recording and reproducing position through the chucking position to the chucking release position (LLLH to LHLH) is equal to or greater than For a predetermined time (for example, 3 seconds), or when the bottom unit 22 is lowered to the clamping release position until the bottom unit 22 moves to a state where all the first to fourth switches SW1-SW4 are not pressed (LHLH to HHHH) When the time is equal to or greater than the predetermined time, it is detected that abnormal transmission is performed. The drive motor 121 stops or rotates normally to load the optical disc 2 .

As described above, according to the disk transfer mechanism 50 of the disk drive device 1 to which the present invention is applied, when the disk 2 is inserted, the user inserts the disk 2 to a predetermined position and is separated from each other along the link arm by the cam ring 57. The first link arm 54 and the second link arm 55 are guided in the same direction, and the force generated by the helical tension spring 56 suspended between the link arms can be applied to the eject arm 52 in the ejection direction. Therefore, it is possible to prevent the optical disc 2 from being incompletely inserted into the casing 3 due to the user stopping the insertion of the optical disc 2 .

When the optical disk 2 is ejected, by moving the first link arm 54 and the second link arm 55 by the cam ring 57 while bringing the link arms into close contact with each other, the action in the ejection direction by the helical tension spring 56 is eliminated. The thrust of the ejection arm 52. The eject arm 52 is rotated according to the operation of the slider 122 and the operation arm 58 which are driven by the driving mechanism 120 . Therefore, the disc transport mechanism 50 can stably eject the optical disc 2 to a predetermined stop position by the driving force of the driving mechanism 120 without relying on elastic force, and the central hole 2a of the optical disc 2 is ejected out of the casing 3 at this position.

In addition, the disk transfer mechanism 50 does not employ a mechanism that rotates the eject lever 52 by the urging force of the coiled tension spring 56 when the optical disk 2 is ejected. Therefore, the eject lever 52 subjected to this thrust does not make a contact sound, which is normally produced when the eject lever comes into contact with the disc. Therefore, with the disc drive device 1, no noise is generated when the disc 2 is ejected and usability is improved.

In the disc drive device 1 of the present invention, the stopper 100 for preventing the wrong insertion of the small-diameter optical disc 101 may be formed on the contact portion 74 of the eject arm 52 . Although the disc drive device 1 is designed for an optical disc 2 having a large diameter (eg, 12 cm diameter), it is foreseeable that a user may mistakenly insert an optical disc 10 having a small diameter (eg, 8 cm diameter). In this case, when the eject arm 52 is pushed in the b1 direction due to the contact of the small-diameter disk 101 with the contact portion 74, the eject arm 52 does not rotate to the position where the drive mechanism 120 is driven. It is possible to eject the small-diameter disk 101 with a force applied in the b2 direction. On the other hand, when the small-diameter disk 101 is inserted while being biased toward the side of the loading arm 51 that does not come into contact with the contact portion 74 of the eject arm 52, the small-diameter disk 101 is likely to be inserted into the inside of the housing 3. And it is kept at a position deviated from the rotation area of the eject arm 52 .

Therefore, as shown in FIG. 28, in the eject arm 52, the stopper 100 for preventing the wrong insertion of the small-diameter disk 101 is formed in the contact portion 74, and therefore, even when the small-diameter disk 101 is inserted and simultaneously biased When facing the loading arm 51 side, the small-diameter disk 101 can also be prevented from being inserted into the case 3 .

The stopper 100 is formed to extend further to the loading arm 51 side than the contact portion 74 . Even when the small-diameter disk 101 is inserted while being biased toward the loading arm 51 side, since a part of the small-diameter disk 101 contacts the stopper 100, further insertion of the small-diameter disk 101 is inhibited.

In the insertion waiting state of the optical disc 2 rotated by the eject arm 52 in the direction of arrow b2 in FIG. The diameter of the small-diameter disc 101 . Therefore, even when the small-diameter disk 101 is inserted while being biased toward the loading arm 51 side, the stopper 100 can securely prevent erroneous insertion.

In addition, when the entire small-diameter disk 101 is substantially inserted from the disk insertion and ejection opening 19, in the insertion waiting state of the optical disk 2, the ejection arm 52 is rotated to a position where the stopper 100 is in contact with the small-diameter The insertion end faces of the disk 101 are in contact. In other words, the stopper 100 comes into contact with the small-diameter disk 101 when substantially the entire small-diameter disk 101 is inserted. Therefore, the small-diameter disk 101 comes into contact with the stopper 100 in a state where almost no remaining portion of the small-diameter disk 101 pushed in from outside the disk insertion and ejection opening 19 remains. Further insertion of the small-diameter disc 101 can be restricted. Therefore, it is difficult for the user to further insert the small-diameter disk 101 into the housing 3 .

The stopper 100 rotates together with the eject arm 52 in the b1 direction and the b2 direction on the disk transfer area. In this case, if the length of the eject arm 52 is formed to prevent the rotation of the stopper 100 on the disk mounting portion 23 of the bottom unit 22 exposed to the disk transfer area, thereby preventing such a situation from occurring, That is, the stopper 100 swings and collides with the turntable 23a and the engaging projection 33a of the disk mounting portion 23 during the rotation of the eject arm 52. As shown in FIG.

In the disk drive device 1 to which the present invention is applied, as shown in FIG. collision. This projection 103 is formed at a certain position on an area where the push-out arm 72 of the eject arm 52 turns on the upper surface 6a of the main frame 6, and on this area, when the contact portion of the eject arm 52 When 74 passes the disk mounting portion 23 or its vicinity, the ejection arm 72 moves.

Therefore, when the optical disc 2 is inserted and the eject arm 52 is rotated in the b1 direction, since the eject arm 72 moves on the protrusion 103, the contact portion 74 rises. Therefore, as shown in FIG. 31B , the rotational trajectory of the contact portion 74 and the optical disk 2 supported by the contact portion 74 rises. This makes it possible to prevent the collision of the turntable 23a of the disk mounting portion 23 and the engaging projection 33a. 31A-31C are schematic diagrams showing the trajectory of rotation of the eject arm 52 indicated by the arrow L direction in FIG. 30 .

The protrusion 103 is formed only at a position where the eject arm 72 moves when the contact portion 74 of the eject arm 52 passes the disk mounting portion 23 or its vicinity. Therefore, the rotation locus of the eject arm 52 does not rise to other positions except the position where the protrusion 103 is formed. Therefore, compared with the case where the protrusion is provided on the eject arm 52 side, it is not necessary to ensure the turning height of the eject arm 52 over the entire turning area. When a downwardly protruding protrusion is formed on the eject arm 52 , the protrusion generally moves to the upper surface 6 of the main chassis 6 . Therefore, the trajectory of eject arm 52 is generally high. In an area other than the main chassis 6, the trajectory of the eject arm 52 must be set high enough to prevent the downwardly protruding protrusion from colliding with other components. Therefore, the thickness of the casing 3 increases, and it is difficult to reduce the size and thickness of the disk drive device. In addition, when the eject arm 52 swings due to disturbance in rotation or the like, the protrusion is likely to come into sliding contact with or collide with other components (such as the optical pickup 25) located below the protrusion.

In view of this, in the disc drive device 1 to which the present invention is applied, since the protrusion 103 is formed on the upper surface 6a of the main chassis 6, the trajectory of the eject arm 52 is only at the portion where the protrusion 103 moves. up to get higher. In other areas, the eject arm 52 is rotated in the lower position. As shown in FIGS. 31A and 31C, since the disk drive device 1 does not have a protrusion protruding downward, a collision with other parts located below the rotation area of the eject arm 52, etc. cannot occur. Reduction in size and thickness of the casing 3 can thus be achieved.

In such a protrusion 103, a slope 103a that guides the ascent and descent of the ejection arm 72 of the ejection arm 52 is formed. Slopes 103a are formed at both ends in the direction in which the push-out arm 72 of the protrusion 103 turns. In the eject arm 52 , the eject arm 72 rises to the protrusion 103 and descends to the upper surface 6 a of the main frame 6 guided by the slope 103 a.

Specifically, in a state where the eject arm 52 is rotated to the disc insertion and eject opening 19 side and is waiting for the optical disc 2 to be inserted, as shown in FIG. 31A, the eject arm 72 is inserted closer to the disc than the protrusion 103 on the main chassis 6. and eject opening 19 side. When the optical disc 2 is inserted, since the contact portion 74 is pressed by the optical disc 2, the ejection arm 72 moves on the protrusion 103 before the ejection arm 52 turns into the housing 3 and rotates on the disc mounting portion 23. In this case, as shown in FIG. 31B, since the eject arm 72 rises while being guided by the slope 103a, smooth rotation of the eject arm 52 can be maintained without applying a load to the insertion of the optical disc 2. When the eject arm 52 is turned further into the housing 3 as shown in FIG. 31C , the eject arm 72 descends to the main chassis 6 while being guided by the slope 103 a of the protrusion 103 .

When the optical disc 2 is ejected, the eject arm 52 is rotated according to the reverse procedure to the above-described procedure. In this case, as in the above case, when the contact portion 74 is rotated on the disk mounting portion 23, the ejection arm 72 rises up to the protrusion 103 while being guided by the slope 103a. Therefore, smooth rotation of the eject arm 52 can be maintained.

The driving mechanism 120 that provides the driving force to the disk transfer mechanism 50 includes: a driving motor 121; a slider 122 that is acted on by the driving force of the driving motor 121 and slides in the bottom case 4; and transmits the driving force of the driving motor 121 to The gear set 123 of the slider 122 . The driving motor 121 , the slider 122 and the gear set 123 are arranged on the bottom case 4 . The drive mechanism 120 drives the disk transfer mechanism 50 and the bottom lift mechanism 150 by sliding the slider 122 with the drive motor 121 .

When the optical disk 2 is inserted to a predetermined position, the first switch SW1 is depressed by the rotation support portion 71 of the eject arm 52, and the drive motor 121 is driven in the normal direction to move the slider 122 in the f1 direction. When the ejecting operation is performed, the drive motor 121 is driven in the opposite rotational direction to move the slider 122 in the f2 direction. The slider 122 moves in the direction of the arrow f1 or the direction of the arrow f2 in FIG. 12 to drive the arms of the disk transfer mechanism 50 and the bottom lift mechanism 150 according to loading and ejection of the optical disk 2 . The gear set 123 transmits the driving force of the driving motor 121 to the slider 122 via the rack portion 131 .

The slider 122 is constituted by a resin component forming a substantially rectangular parallelepiped shape as a whole. As shown in FIG. 32A, on the upper surface 122a of the slider 122, there are formed: a first guide groove 125, which engages with the engaging projection 109 formed in the third link arm 94; a second guide groove 126, which engages with The engaging arm 165 of the sub-slider 151 which drives the bottom lift mechanism 150 described later engages; a pair of engaging notches 127 which engage with a pair of engaging protrusions 68 formed in the loading cam plate 53; and the third guide groove 128, It is engaged with one end of an opening and closing arm 191 of a disk insertion restricting mechanism 190 described later.

In the slider 122, formed at one side 122b on the bottom unit 22 side is a first cam slot 130 through which the first support rod 47 protrudingly provided in the sub-chassis 29 of the bottom unit 22 is inserted. and the rack portion 131, which meshes with the gear set 123. The first guide plate 152 that prevents the backlash of the first support rod 47 of the subchassis 29 and operates the disk rotation driving mechanism 24 stably is assembled in the first cam slot 130 . In the slider 122, a slider guide groove 129 whose sliding direction is guided to a pair of guide protrusions 124 protrudingly provided from the bottom case 4 is formed on the lower surface 122c in the longitudinal direction (see FIG. 10).

The slider 122 is disposed between one side of the bottom case 4 and the bottom unit 22 on the lower surface of the bottom case 4 . The slider 122 is positioned below the optical disk 2 inserted into the casing 3 from the disk insertion and ejection opening 19 . The upper surface 122 of the slider 122 has a height slightly smaller than that of the platform portion 4a. The slider 122 is covered by the main chassis 6 and driven by a driving motor 121 and a gear set 123 provided on the lower surface of the bottom case 4 to slide in forward and backward directions.

In the driving mechanism 120 , in conjunction with the sliding operation of the slider 122 , the third link arm 94 and the operating arm 58 engaged with the third link arm 94 move to restrict the rotation of the eject arm 52 . In addition, the loading cam plate 53 moves forward and backward to rotate the loading arm 51 . As a result, the drive mechanism 120 performs a loading operation to push the optical disc 2 into the housing 3 from the disc insertion and ejection opening 19 according to the sliding of the slider 122, and performs an ejecting operation to eject the optical disc 2 from the disc mounting portion 23 to the disc. The sheet is inserted and ejected out of the opening 19.

Next, the stopper lever 140 for centering operation for positioning the loaded optical disc 2 on the disc mounting portion 23 will be described. As shown in Fig. 6, a lever body 141 is formed in the stop lever 140: a lever body 141, which is rotatably supported by the main frame 6; Optical disc 2; support protrusion 143 through which the annular portion of the coil spring 144 is inserted on the other side of the lever body 141, and the support protrusion 143 rotatably supports the lever body 141 on the main chassis 6; and a limiting projection 145, which passes through the guide hole 146 drilled in the main frame 6 and limits the rotation of the lever body 141, so that the stop projection 142 stops the optical disc 2 in the center position.

The lever body 141 is composed of a resin component. In the lever body 141, one end 141a in which the stopper protrusion 142 is protrudingly provided is formed substantially in a circular arc shape. The supporting protrusion 143 is supported by the main chassis 6 , whereby the aforementioned one end 141 a is provided to extend to a sliding area of the slider 122 . As a result, the front end of the slider 122 and the lever body 141 come into contact with each other as the slider 122 slides, so that the stopper lever 140 is rotatable about the supporting protrusion 143 .

A stopper protrusion 142 is protrudingly provided from one end of the lever 141 to protrude on the upper surface 6 a of the main chassis 6 from a rotation hole 147 formed in the main chassis 6 and capable of contacting the outer peripheral surface of the optical disc 2 . Since the side of the insertion end side of the optical disc 2 pulled by the loading arm 51 comes into contact with the stopper protrusion 142 , the stopper protrusion 142 can perform a centering operation to stop the optical disc 2 to the disc mounting portion 23 . The rotation hole 147 that makes the stopper protrusion 142 protrude on the main chassis 6 is formed in a substantially circular arc shape so that it can be retracted from the stop position where the stopper protrusion 142 is centered on the optical disk 2 .

The support projection 143 is a substantially cylindrical portion including a hollow portion in which a thread groove is cut. A support protrusion 143 is protrudingly provided at the other end of the lever body 141 . The thread of the hollow part is continuous with the thread of the threaded hole drilled in the main frame 6, whereby the supporting protrusion 143 can be supported on the main frame 6 to freely rotate in the direction of the arrow g1 and the direction of the arrow g2 in FIG. 12 . A ring portion of the coil spring 144 is inserted through the support protrusion 143 . One end of the coil spring 144 is locked to the lever body 141 , and the other end is locked to the circuit board 59 disposed on the bottom case 4 . As a result, the coil spring 144 urges the stopper lever 140 to rotate about the support protrusion 143 in the direction of arrow g1 in FIG. 12 .

The restricting protrusion 145 restricts the rotation area of the lever body 141 that is urged to rotate by the coil spring 144 . As shown in FIG. 3 , the restricting protrusion 145 is protrudingly provided above the lever body 141 and exposed on the upper surface 6 a of the main frame 6 from a guide hole 146 formed in the main frame 6 . The guide hole 146 restricts the rotation area of the restriction protrusion 145 to stop the lever body 141 biased to rotate by the coil spring 144 in the g1 direction at a predetermined position for centering the optical disk 2 . The guide hole 146 is formed in a circular arc shape to make it possible to withdraw the lever body 141 from the stop position for centering the optical disc 2 .

Since the lever body 141 is pushed by the coil spring 144 and the limit projection 145 is locked to the end of the arrow g1 side of the guide hole 146, the stop lever 140 is rotated to the stop position where the stop projection 142 holds the disc 2 Stop in the center position. When the optical disc 2 is loaded, the side of the insertion end side of the optical disc 2 comes into contact with the stopper protrusion 142 . As a result, the stopper lever 140 positions the optical disc 2 on the disc mounting portion 23 . After the centering is completed, one end 141a of the lever body 141 is pressed toward the front end of the slider 122 conveyed in the f1 direction and the rotation of the lever 140 is stopped in the arrow g2 direction. As a result, the stopper projection 142 is separated from the outer edge of the optical disc 2 to make the optical disc 2 rotatable. When the optical disc 2 is ejected, since the slider 122 slides in the f2 direction, the stopper lever 140 is pushed by the coil spring 144 to rotate to the stop position where the stop flange 142 stops the disc 2 at Centered to prepare disc 2 to load.

The bottom elevating mechanism 150 that raises or lowers the bottom unit 22 in conjunction with the sliding operation of the slider 122 will be described below. The bottom lift mechanism 150 operates to raise and lower the bottom unit 22 between the chucking position, the chucking release position, and the recording and reproducing position. In the clamping position, the bottom unit 22 rises to install the optical disc 2 positioned at the disc mounting position on the turntable 23a of the disc mounting part 23; The turntable 23a unmounts the optical disc 2; and at the recording and reproducing position, the bottom unit 22 is located between the chucking position and the chucking release position to record signals to or reproduce signals from the optical disc 2.

Specifically, the bottom lifting mechanism 150 raises and lowers the first support bar 47 and the second support bar 48 formed on the bottom unit 22 by using the slider 122 and the sub-slider 151 slid according to the sliding operation of the slider 122, The bottom unit 22 is thereby raised and lowered. As shown in FIG. 32A , a first cam slot 130 that operates to raise and lower the bottom unit 22 at the chucking release position and the recording/reproduction position is formed in the longitudinal direction on the side opposite to the bottom unit 22 of the slider 122 . Formed in the first cam slot 130 are: a lower horizontal surface portion 130a corresponding to the chucking release position, an upper horizontal surface portion 130b corresponding to the recording and reproducing position, and a connection connecting the lower horizontal surface portion 130a and the upper horizontal surface portion 130b. Bevel portion 130c. A first support rod 47 protrudingly provided in the sub-chassis 29 of the bottom unit 22 is slidably passed through the first cam slot 130 .

As shown in FIG. 32A, a first guide plate 152 that guides the movement of the first support lever 47 and prevents the backlash of the first support lever 47 at the recording and reproducing position is provided in the first cam slot 130 to stably operate the disc. Rotate drive mechanism 24 . The first guide plate 152 is constituted by a leaf spring portion. One end of the first guide plate 152 is locked to a locking piece 153 formed on an upper portion of the first cam slot 130 , and the other end thereof is locked to an engaging notch 154 formed on a lower side of the first cam slot 130 . In the first guide plate 152, a convex portion 155 in a bent state is formed above the contact point of the upper side horizontal surface portion 130b and the slope portion 130c. Move to the raised portion 155 , and when the first support rod 47 moves to the upper horizontal surface portion 130 b, the raised portion is raised to the side of the upper surface 122 a of the slider 122 .

The lower horizontal surface portion 130a of the first cam slot 130 has a height slightly larger than the diameter of the first support rod 47 and is formed to be slidable. On the other hand, the height from the first guide plate 152 to the upper horizontal surface portion 130 b is set to be equal to or slightly smaller than the diameter of the first support rod 47 . Therefore, when the first support rod 47 moves to the upper horizontal surface portion 130b, the first support rod 47 is pressed and sandwiched between the first guide plate 152 and the upper horizontal surface portion 130b. Therefore, the first guide plate 152 can control the vibration generated by the spindle motor 24a of the disk rotation driving mechanism 24 provided on the bottom unit 22 and make the optical disk 2 rotate stably.

Since the first support rod 47 is sandwiched between the first guide plate 152 and the upper horizontal surface portion 130b, the raised portion 155 protrudes above the upper surface 122a of the slider 122 to press against the upper surface 6a of the main frame 6 . Therefore, the slider 122 is pressed toward the bottom case 4 side by the first guide plate 152 . The influence of vibrations due to driving the bottom unit 22 and external disturbances can be controlled.

The sub-slider 151 supports the second support bar 48 protrudingly provided from the sub-chassis 29 of the bottom unit 22 and engages with the slider 122 . The sub-slider 151 is configured to slide in the arrow h1 direction or the arrow h2 direction in FIG. 12 perpendicular to the loading direction of the optical disc 2 according to the sliding operation of the slider 122 .

As shown in FIG. 32B, the sub-slider 151 is composed of a long flat plate made of synthetic resin. On the upper surface 151a of the sub-slider 151, an upper guide groove 158 is formed in the longitudinal direction, and a guide protrusion 157 protruding from the main frame 6 is engaged with the guide groove 158 . In the sub-slider 151, at a position staggered from the upper guide groove 158 of the lower surface 151b, a lower guide groove 160 is formed in the longitudinal direction, and the guide protrusion 159 protruding from the bottom shell 4 is engaged with the lower guide groove 160. (See Figure 10). Since the guide protrusion 157 protruding from the main frame 6 is engaged with the upper guide groove 158 , the guide protrusion 157 can slide in the upper guide groove 158 . Since the guide protrusion 159 projected from the bottom frame 4 is engaged with the lower guide groove 160 , the guide protrusion 159 can slide in the lower guide groove 158 . As a result, the sub-slider 151 slides in the direction of the arrow h1 or the direction of the arrow h2 in conjunction with the sliding operation of the slider 122 .

In the sub-slider 151 , an engaging groove 166 is formed at one end in the longitudinal direction on the slider 122 side, and an engaging arm 165 coupled to the slider 122 is engaged with the engaging groove 166 . Engagement grooves 166 are provided in engagement pieces 167 extending in a direction perpendicular to the longitudinal direction of the sub-slider 151 . In the sub-slider 151, the other end on the opposite side to the end forming the engaging piece 167 is provided as a contact protrusion 168 that contacts the rotation support portion 71 of the eject arm 52 when the optical disc 2 is loaded. touch. When the optical disc 2 is loaded, the contact protrusion 168 comes into contact with the bent piece 81 of the rotation support portion 71 . Therefore, by the first link arm 54 coupled with the rotation support portion 71 and by the guide protrusion 113 of the second link arm 55 coupled to the first link arm 54, the contact protrusion 168 moves in the direction of the cam ring 57. Climb on raised 112c. In addition, the contact protrusion 168 rotates the eject arm 54 until the contact portion 74 is disengaged from the side of the optical disk 2 .

In the sub-slider 151, on the side of the disk insertion and ejection opening 19, there is formed a second cam slot 170 that raises and lowers the bottom unit 2 at the chucking position, the chucking release position, and the recording/reproducing position, which are connected with The first cam slots 130 are formed together in the longitudinal direction. In the second cam slot 170, a lower horizontal surface portion 170a corresponding to the chucking release position, an upper horizontal surface portion 170b corresponding to the recording and reproducing position, and a connecting upper horizontal surface portion 170a and the lower horizontal surface portion 170b are formed. The inclined portion 170c corresponding to the clamping position. The second support rod 48 protrudingly provided on the sub-chassis 29 of the bottom unit 22 is slidably passed through the second cam slot 170 .

The slope portion 170c of the second cam slot 170 is positioned higher than the upper horizontal portion 170b, and is slightly lowered to guide the bottom unit 22 to the upper horizontal portion 170b. As a result, since the sub-slider 151 slides in the h1 direction, the second support rod 48 rises from the lower horizontal surface portion 170a to the inclined surface portion 170c, and the bottom unit 22 guided by the second cam slot 170 moves from the snapping release position to the slope portion 170c. The snap-in position moves. In this case, in the bottom unit 22, the periphery of the central hole 2a of the optical disk 2 conveyed to the disk mounting portion 23 is clamped by the turntable 23a and the contact protrusion 8 provided on the top plate portion 5a of the top cover 5. As the sub-slider 151 further slides in the h1 direction, the bottom unit 22 moves from the chucking position to the recording and reproducing position as the second support rod 48 descends from the slope portion 170c to the upper horizontal portion 170b.

As shown in FIG. 32B, the second cam slot 170 is provided with a second guide plate 171 the same as the first cam slot 130, which guides the movement of the second support rod 48 and prevents the movement of the second support rod 48 at the recording and reproducing positions. The backlash acts to operate the disk rotation drive mechanism 24 stably. The second guide plate 171 is made of a leaf spring portion. One end of the second guide plate 171 is locked to a locking piece 173 formed at an upper portion of the second cam slot 170 , and the other end thereof is locked to an engaging notch 174 formed at a lower side of the second cam slot 170 . In the second guide plate 171, a raised portion 175 in a bent state is formed above the contact point of the upper horizontal surface portion 170b and the inclined surface portion 170c. When the bottom unit 22 rises to the clamping position, the second support rod 48 The raised portion 175 is moved to, and when the second support rod 48 is moved to the upper horizontal surface portion 170b, the raised portion is raised to the upper surface 151a side of the sub-slider 151 .

The lower horizontal surface portion 170a of the second cam slot 170 has a slightly larger diameter than the second support rod 48 and is formed to be slidable. On the other hand, the height from the second guide plate 171 to the upper horizontal surface portion 170 b is set to be equal to or slightly smaller than the diameter of the second support bar 48 . Therefore, when the second support rod 48 moves to the upper horizontal surface portion 170b, the second support rod 48 is pressed and sandwiched between the second guide plate 171 and the upper horizontal surface portion 170b. Therefore, the second guide plate 171 can control the vibration generated by the spindle motor 24a of the disc rotation driving mechanism 24 provided in the bottom unit 22 together with the first guide plate 152 and stably rotate the optical disc 2 .

Since the second support rod 48 is sandwiched between the second guide plate 171 and the upper horizontal surface portion 170b, the raised portion 175 protrudes from the upper surface 151a of the sub-slider 151 to press against the upper surface 6a of the main chassis 6 . Therefore, the sub-slider 151 is pressed toward the bottom case 4 side by the second guide plate 171 . The influence of vibration and disturbance due to driving the bottom unit 22 can be controlled.

The engaging arm 165 that engages with the engaging groove 166 of the sub-slider 151 and couples the slider 122 and the sub-slider 151 is formed substantially in an L shape. The bent portion 165a is rotatably connected to the main chassis 6 . The engaging protrusion 177 formed on the one end 165 b extending from the bent portion 165 a on the short side is movably engaged in the second guide groove 126 of the slider 122 . The engaging projection 178 formed on the other end 165c of the long side is movably engaged in the engaging groove 166 of the sub-slider 151 .

When the slider 122 moves in the f1 direction, since the engaging protrusion 177 moves the second guide groove 126 of the slider 122, the engaging arm 165 rotates in the i1 direction with the bent portion 65a as a fulcrum. The engaging protrusion 178 slides the sub-slider 151 in the h1 direction while moving in the engaging groove 166 . When the slider 122 moves in the f2 direction, since the engaging protrusion 177 moves the second guide groove 126, the engaging arm 165 rotates in the i2 direction with the bent portion 165a as a fulcrum. The engaging protrusion 178 slides the sub-slider 151 in the h2 direction while moving in the engaging groove 166 .

As shown in FIG. 3, FIG. 6 and FIG. 33, a guide pin 180 is provided in the disc drive device 1, which guides the bottom unit 22 so that when the bottom unit rises to the clamping position, the disc transfer mechanism 50 transfers to the The center hole 2a of the optical disk 2 at the center position coincides with the position of the turntable 23a provided on the disk mounting portion 23 of the bottom chassis 27. As shown in FIG.

The guide pins 180 are vertically disposed from the bottom surface of the bottom case 4 . As shown in FIG. 33 , a flange portion 182 through which a guide hole 181 formed in the bottom chassis 27 is inserted is formed at an upper portion of the guide pin 180 . The diameter of the flange portion 182 is slightly larger than the diameter of the guide hole 181 of the bottom frame 27 . In the flange portion 182 are formed: a first guide portion 183 formed by a slope that increases in diameter at the upper end; and a second guide portion 184 that is formed by a slope that decreases in diameter at the upper end. When the bottom frame 27 is raised and lowered, since the first and guide portions 183, 184 pass through the guide wall 185 formed in the guide hole 181 while being in sliding contact with the guide wall 185, the flange portion 182 guides the bottom unit 22. to the snap-in position and the snap-in release position.

Guide holes 181 of the bottom frame 27 through which guide pins 180 are inserted are provided near the turntable 23 a separated from the third support rod 49 as a fulcrum of rotation of the bottom unit 22 . As shown in FIG. 33 , in the guide hole 181 , the guide wall 185 is in an expanded shape under the bottom frame 27 . The guide wall 185 forms a gap slightly larger than the diameter of the flange portion 182 of the guide pin 180 . Since the flange portion 182 passes through the gap, the bottom unit 122 is guided so that the central hole 2a of the optical disc 2 and the turntable 23a of the disc mounting portion 23 are positioned in coincidence.

34 and 33 (a), when the bottom unit 22 descends to the clamping release position, in the guide pin 180, the flange portion 182 is located above the guide hole 180. . When the optical disc 2 is transported to the center position, the bottom chassis 27 rises and the flange portion 182 passes through the guide hole 181 . When the bottom frame 27 was raised to the clamping position of the optical disc 2, as shown by the solid line in Figure 35 and Figure 33 (b), the guide wall 185 that was formed to expand in the guide hole 181 was guided by the first guide pin 180. part 183, and the flange part 182 passes through the gap of the guide wall 185. Thus, since the bottom chassis 27 rises while being guided by the guide pins 180, the turntable 23a of the disc mounting portion 23 coincides with the position of the center hole 2a of the disc 2 transported to the center position. Therefore, chucking can be performed smoothly without applying an extra load to the optical disk 2 and the turntable 23a.

A guide pin 180 and a guide hole 181 are formed at the other end side opposite to one end in the longitudinal direction where the third support rod 49 supporting the rotation of the bottom unit 22 is provided and formed near the disk mounting portion 23 . It is therefore possible to most effectively correct the deviation between the optical disc 2 conveyed to the center position and the turntable 23a. It is also possible to securely position the central hole 2a of the optical disk 2 and the engaging protrusion 33a of the turntable 23a.

36 and FIG. 33 (c) shown by double dotted lines, when the bottom unit 22 descended to the recording and reproduction position, the guide wall 185 of the guide hole 181 of the bottom frame 27 was guided at the second guide of the flange portion 182. The flange portion 182 is slid onto the guide hole 181 while the flange portion 182 is insertably guided. Then, the guide wall 185 descends to a position where the guide wall 185 is separated from the flange portion 182 . In this way, the guide pin 180 and the guide hole 181 do not contact each other in a state where the bottom unit 22 is lowered to the recording and reproducing position. Thereby, disturbance such as vibration can be prevented from being transmitted from the bottom case 4 to the bottom chassis 27 via the guide pin 180 . Therefore, it is possible to prevent disturbance from being transmitted to the disk rotation drive mechanism 24 and the optical pickup 25 via the guide pin 180 and adversely affecting the recording and reproducing characteristics.

The guide pin 180 is formed at a certain height to prevent the guide pin 180 from coming into contact with the lower surface of the optical disc 2 driven to rotate by the disc rotation driving mechanism 24 . Therefore, the guide pin 180 is unlikely to scratch the information recording surface of the optical disc 2 .

When the recording and reproducing operations are finished and the disk drive device 1 turns to the disk ejection process, the bottom unit 22 descends to the chucking release position and the disk 2 is pushed up from the turntable 23 by the push-up pin 10 to release the chucking. In this case, in the bottom frame 27 , the guide holes 181 are located below the guide pins 180 .

In the disk drive device 1 applicable to the present invention, the guide pin 180 can be used as the push-up pin 10 to release the clamping of the disk 2 . In other words, the upper end of the guide pin 180 may be formed in a hemispherical shape, and the guide hole 181 of the bottom chassis 27 may be formed corresponding to a non-recording area formed near the center hole 2a of the optical disc 2 mounted on the turntable 23a. As a result, when the bottom unit 22 descends to the chucking release position of the optical disk 2, the optical disk 2 is pushed by the upper end of the guide pin 180 and released from the chucking with the turntable 23a. According to this configuration, since the push-up pin 10 is not required except for the guide pin 180, the number of parts and the weight of the disk drive device 1 can be reduced.

In the disk drive apparatus according to the present invention, when the transfer arm is rotated and when the transfer arm is rotated on the disk mounting portion, the transfer arm is raised by moving on the protrusion. Therefore, it becomes possible to raise the rotation locus of the transfer arm to suppress the collision with the disk mounting portion.

In the disk transfer mechanism and the disk drive device according to another embodiment of the present invention, when the disk-shaped recording medium is ejected, even if there is an obstacle that inhibits the ejection of the disk-shaped recording medium and there is an object opposite to the ejection direction of the disk-shaped recording medium The force in the direction acts on the eject arm, and since the ejection unit subjected to the force in the opposite direction rotates in the loading direction, it is possible to prevent an additional load from acting on the drive motor and the disk-shaped recording medium.

It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and changes may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims and the equivalents thereof.

Claims (6)

1. A recording medium drive device for recording information to or reproducing information from a recording medium, comprising: a device body into which the recording medium is inserted or removed; a transport mechanism that transports the recording medium in a loading direction and an ejecting direction; a mounting portion on which the recording medium is mounted; a transfer arm that moves and transfers the recording medium according to the movement of the recording medium in the loading direction and the ejecting direction; and a driving mechanism, the recording medium has a driving source for applying a driving force to move the transfer arm, wherein The transfer arm includes: a contact portion that comes into contact with the recording medium; and A urging member that pushes the contact portion in the direction in which the recording medium is ejected. 2. The recording medium driving apparatus according to claim 1, further comprising a loading arm pushed to rotate in a recording medium loading direction, wherein When the recording medium is ejected, the loading arm is rotated in the ejecting direction of the recording medium by the drive mechanism, while supporting the ejecting end side side of the recording medium in the loading direction. 3. The recording medium drive device according to claim 1, wherein: A main chassis is provided and an upper surface side of the main chassis is set as a transfer area for recording media; the mounting portion is exposed to the transfer area from an opening of the main chassis; the transfer arm is disposed on the main frame and the mounting portion; and Protrusions are formed in the main chassis to limit the position of the transfer arm in the height direction when the transfer arm is rotated near the mounting portion. 4. The recording medium driving device according to claim 3, wherein, in the protrusion, slopes are formed at both ends in the direction of rotation of the transfer arm, and the slopes extend continuously from the main frame and guide the transfer arm. rise and fall. 5. The recording medium drive device according to claim 3, wherein: The transfer arm includes: a support portion supported on the device body side; and an arm portion in a loading direction of a recording medium is rotatably supported by the supporting portion; the contact portion moves on the mounting portion; and The arm portion moves over the protrusion. 6. An electronic device comprising an instruction unit that issues instructions of insertion and ejection operations of a recording medium to a recording medium drive device that records or reproduces information to or from a recording medium, wherein The recording medium drive device includes: a device body into which the recording medium is inserted or removed; a transport mechanism that transports the recording medium in a loading direction and an ejecting direction; a mounting portion on which the recording medium is mounted; a transfer arm that moves and transfers the recording medium according to the movement of the recording medium in the loading direction and the ejecting direction; and a drive mechanism having a drive source for applying a drive force to move the transfer arm, and The transfer arm includes: a contact portion that comes into contact with the recording medium; and A urging member that pushes the contact portion in the direction in which the recording medium is ejected.

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