JPH0935385A - Disk device and method of guiding turntable in disk device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a disk device in which a turntable can be accurately fitted into the center hole of the disk even when the disk device is used in a vertical position. A base 23 having a turntable 26 for rotating a disc 3 and a front portion of the base 23 are provided at a first position where the turntable 26 can be fitted with the disc 3 and from the disc with respect to the first position. A moving mechanism 30 for moving between a second position apart from each other in a separating direction, and an ejecting position of the disc 3 to a loading position of the disc 3 in conjunction with movement of the base 23 from the second position to the first position. The disk tray 4 moving to the first position and at least the base 23 when the base 23 reaches the first position from the second position.
3 is provided on the back surface of the disc tray 4 and the openings of the insulators 29b and 29c provided on the base 23. And a guide protrusion 4c that can be fitted into the opening 290 of the insulator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device having a function of at least reproducing an optical disc and the like, and a method of guiding a turntable in the disc device. The present invention relates to a corresponding disc device and a turntable guiding method in the disc device.

[0002]

2. Description of the Related Art A disk device for reproducing an optical disk such as a CD-ROM is known. 8 and 9 are side views schematically showing the structure of a conventional disk device.

As shown in these figures, a disk drive 1
Reference numeral B denotes an apparatus main body 2 and a disk tray 4 which is moved in the front-rear direction (horizontal direction in the drawing) with respect to the apparatus main body 2 to be taken in and out.
It is composed of

The apparatus main body 2 includes a bottom plate 11, a main circuit board assembly 12 provided on the bottom plate 11, and a mechanism assembly 1 provided on the main circuit board assembly 12.
3 and a case 14 that covers the upper side of the mechanism assembly 13. The case 14 has a top plate portion 14a, and a disc clamper 38 is rotatably installed on the lower surface (inner surface) of the case 14 coaxially with a turntable 26 described later.

The mechanism assembly 13 has a chassis 20,
A mechanism unit 22 is provided on the chassis 20. The mechanism unit 22 has a base 23, and the base 23 has a spindle motor 25 for rotating a turntable and a turntable 2 fixed to its rotating shaft.
6, an optical head 27, and an optical head moving mechanism (not shown) for moving the optical head 27 in the radial direction of the optical disk 3.

By the way, in this type of disk device, an anti-vibration structure is adopted so that vibrations from the outside are not directly transmitted to the optical head and the like. Has been taken into consideration.
That is, the base 23 is rotatably supported with respect to the chassis 20 via an insulator 29a made of an elastic body (rubber or the like) at the rear end (the inner side of the apparatus main body 2). Both front side portions of the base 23 are also connected to the vertical movement mechanism 30 via similar insulators 29b and 29c. Then, the operation of the vertical movement mechanism 30 causes the base 23 to rotate in the vertical direction about the insulator 29a, and the front portion of the base 23 is in a raised position where the turntable 26 can mount the disc 3 (FIG. 9). (See FIG. 8) and a lower position (see FIG. 8) below the raised position.

The disc tray 4 is a member on which the optical disc 3 is placed, and the base 2 is operated by the operation of the vertical movement mechanism.
3 (that is, the mechanical unit 22) moves up and down,
It moves in the front-rear direction with respect to the apparatus main body 2 between an optical disk loading position and an optical disk ejecting position.

When the disc device 1B is not used, the disc tray 4 is in a state of being accommodated in the device body 2 (disc loading position), and the base 23 is in the raised position. When the eject operation is performed in this state, the disc tray 4 is moved forward by the driving of a motor (not shown),
The base 23 (that is, the mechanism unit 22) moves down from the raised position to the lowered position while moving to a position (disc ejection position) protruding outward from the device body 2.

When the disc 3 is placed on the disc tray 4 and a loading operation is performed, the disc tray 4 moves rearward to the disc loading position and
The base 23 rises toward the raised position. This allows
The turntable 26 is fitted into the center hole 3a of the disc 3 and the disc clamper 38 is attached to the turntable 2
6 is magnetically attracted to the optical disc 6, the optical disc 3 is sandwiched between the disc clamper 38 and the turntable 26, and reproduction by the optical head 27 becomes possible (see FIG. 9).

When an eject operation is performed, the disk device 1
Each of the mechanisms B operates in the reverse order and in the opposite direction to that at the time of loading, and the disc 3 is released from the clamp, placed on the disc tray 4, and ejected.

The disk device having the above-mentioned structure is generally used in a horizontally placed state, that is, in a state where the disk is taken in and out in the horizontal direction.

However, some personal computers equipped with a disk device such as a CD-ROM drive device are used vertically, that is, in a state where the disk is vertically inserted and removed. Also,
Some CD-ROM drive devices that can be externally attached to the computer body can be installed vertically due to the installation space.

When the disk device having the above-mentioned structure is used in such a vertical installation, since the turntable 26 and the spindle motor 25 are provided in the front part of the base 23, the weight becomes considerable. When 23 moves from the second position to the first position, the insulator (particularly 29b, 29c) may be deformed by the weight, and the base 23 may move in a state in which it is lowered below the original movement path. . In particular, after the disc 3 is fitted to the turntable 26, the weight of the disc 3 is also added, and the deformation of the insulator is further increased.
There is a case where the positional relationship between 6 and the center hole of the disk 3 placed on the disk tray 4 is deviated.

When such a situation occurs, the turntable 26 cannot accurately engage with the central hole of the disk 3 placed on the disk tray 4, and the disk 3 cannot be clamped properly. Also, in such a state, the disc 3
However, there is a problem that the recording surface of the disc 3 will be rubbed against other members such as the disc tray and the disc will be damaged if the reproduction is forcedly performed.

In order to solve such a problem, an attempt has been made to urge the lower side of the mechanism unit with a spring when it is placed vertically, but it lacks stability and the number of parts such as the spring increases while the spring increases. There was a problem that the design became complicated because of the installation space of the.

[0016]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. Even when the disc device is used in a vertical position, the above-mentioned clamp failure and disc rubbing at the time of reproduction occur. It is an object to provide a disk device that does not have a disk.

It is another object of the present invention to provide a turntable guiding method which does not cause the above-mentioned defective clamping or disc rubbing at the time of reproduction even when the disc device is installed vertically.

[0018]

In order to achieve such an object, a disk device according to the present invention has a base provided with a turntable for rotating a disk, and at least one end portion of the base, the turntable being provided with the turntable. A moving mechanism for moving between a first position at which the disk can be fitted and a second position away from the disk in a direction away from the first position, and a second position from the second position at one end of the base. 1
A disc tray that moves from a disc ejection position to a disc loading position in conjunction with movement to a position, and at least one end of the base reaches the first position of the base from the second position. Guide means for guiding the movement from the second position to the first position, the guide means having a first means provided on the base and a second means provided on the disc tray. .

Further, the disk device according to the present invention further includes a base so that the base moves along a correct path when the base moves between the first position and the second position. It may have a biasing means for biasing.

It is preferable that the second means comprises at least one engaging projection provided on the back surface of the surface of the disk tray on which the disk is placed and capable of cooperating with the first means.

Further, the base has at least one vibration absorbing means connected to the moving mechanism, and the first means cooperates with the at least one engaging projection in the vibration absorbing means. It is preferably provided.

In this case, the first means comprises an opening into which the at least one engaging projection formed in the vibration absorbing means can be inserted.

Further, the at least one engaging protrusion is
Preferably, the tip portion has a chamfered taper portion.

The second means is preferably the first means when the disc tray is located at the loading position.
It is configured to be engageable with the first means of the base located in the position.

Further, the disk device according to the present invention includes a turntable for rotating the disk, a base provided on the chassis via a vibration absorbing member so as to be pivotable about the rear end, and a base for the base. A movement for pivoting the front end portion around the rear end portion between a first position where the turntable can be fitted to the disc and a second position which is separated from the disc in a direction away from the first position. The mechanism, the disc tray that moves from the disc ejection position to the disc loading position in conjunction with the movement of the front end portion of the base from the second position to the first position, and the disc device are used in a vertically installed state. In this case, when the base moves from the second position to the first position, there is provided guide means for restricting and guiding relative movement in the vertical direction between the base and the disc tray. It can be configured to so that.

Further, in the turntable guiding method in the disc device according to the present invention, the base provided with the turntable for rotating the disc is placed at the first position and the first position where the turntable can be fitted to the disc. On the other hand, a disc tray on which a disc is placed is provided so as to be movable between a second position that is separated from the disc in a direction away from the disc, and the disc tray is interlocked with the movement of the base from the second position to the first position. In a disc device provided to move from the eject position to the disc loading position, the turntable moves along a correct movement path when the base moves from the second position to the first position. In addition, the base is guided through a part of the disc tray.

[0027]

According to the above-described disk device of the present invention, a base having a turntable for rotating the disk, at least one end of the base, and a first position where the turntable can be fitted to the disk are A moving mechanism that moves between a first position and a second position away from the disc in a direction away from the disc, and ejecting the disc in conjunction with movement of one end of the base from the second position to the first position. A disc tray that moves from a position to a disc loading position, and guides the movement of the base from the second position to the first position when at least one end of the base reaches the first position from the second position The guide means comprises a first means provided on the base and a second means provided on the disc tray.
Therefore, even when the disk device is used vertically,
When the base moves from the first position to the second position, the base moves while being guided by the guide means, so that the base does not drop downward due to the weight of the turntable, the motor or the disc. The turntable can be securely engaged with the center hole of the disc.

According to the turntable guiding method in the disk device of the present invention, when the base provided with the turntable moves from the second position to the first position, the turntable has a correct movement path. Since the base is guided through a part of the disc tray so as to move along the base, even when the disc device is used vertically, the base moves from the second position to the first position. The turntable does not drop downward when moving, and the turntable can be reliably fitted into the center hole of the disc.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk device according to the present invention and a turntable guiding method by the device will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings. To facilitate understanding, the same reference numerals are used for the parts corresponding to the above-mentioned conventional example.

FIG. 1 is an exploded perspective view showing an embodiment of a disk device of the present invention, FIG. 2 is a plan view of the disk device shown in FIG. 1, and FIG. 3 is a cam wheel structure in the disk device shown in FIG. FIG. 4 is a bottom view showing the structure of the back surface of the disc tray in the disc device shown in FIG. 1, FIG. 5 is a sectional view showing the structure of the vibration absorbing means (insulator), and FIG. FIG. 7 is a partial sectional view showing the structure of the guiding means according to the present invention, and FIG. 7 is a sectional view showing a modification of the guiding means according to the present invention.

As shown in FIG. 1, a disk device 1A of the present invention is a device for reproducing an optical disk 3 such as a CD-ROM, and mainly comprises a device main body 2 and the device main body 2.
It is composed of a disc tray 4 for moving an optical disc which is moved in the front-rear direction (horizontal direction) and is taken in and out.

The apparatus main body 2 includes a bottom plate 11, a main circuit board assembly 12 provided on the bottom plate 11, and a mechanism assembly 1 provided on the main circuit board assembly 12.
3 and a case 14 that covers the upper side of the mechanism assembly 13. The case 14 includes a top plate portion 14a, left and right side plate portions 14b and 14c, a back plate portion 14d, and a front plate portion 1
4e. On the lower surface (inner surface) of the top plate portion 14a, a disk clamper 38 is installed so as to be rotatable coaxially with a turntable 26 described later.

The disc tray 4 is provided on the front plate portion 14e.
Is formed with a narrow opening 141e. A front bezel 16 is attached to the front plate portion 14e via a frame 15 made of a cushion material such as sponge. The front bezel 16 also has a narrow opening 16a through which the disc tray 4 is inserted and removed.

The mechanism assembly 13 is a chassis 2 having a substantially container shape.
It has 0. The chassis 20 is composed of a rectangular, substantially plate-shaped bottom portion 20a, and wall portions 20b provided upright in a U-shape along the left and right sides and the rear edge portion of the bottom portion 20a. A wall portion is not formed on the front bezel 16 side of the chassis 20 and is in an open state, and when the chassis 20 is assembled into the case 14, the opening 14 of the case 14 is opened.
1e is located.

As shown in detail in FIG. 2, the chassis 20 is provided with a mechanism unit 22 and a moving mechanism (vertical movement mechanism) 30 for the mechanism unit. Of these, the mechanical unit 22 is the bottom portion 20 a of the chassis 20.
The recessed space 21 is formed so as to fit in the vicinity of the center of the recessed space 21, and the moving mechanism 30 is installed in front of the recessed space 21.

The mechanical unit 22 has a base 23,
On the base 23, a spindle motor 25 for rotating a turntable, a turntable 26 fixed to a rotation shaft of the spindle motor 25, an optical head (including an actuator) 24, and the optical head 24 are mounted on the optical disc 3.
And an optical head moving mechanism 28 that moves in the radial direction. Spindle motor 25 and turntable 2
6 and 6, a rotation driving means for rotating the optical disc 3 is constituted. The turntable 26 includes a permanent magnet that can attract the disc clamper 38.

The optical head moving mechanism 28 includes a forward / reverse rotation motor 28a, a lead screw 28b which is rotated by the drive of the motor 28a, and a reduction gear train which reduces the rotation of the motor 28a and transmits the rotation to the lead screw 28b. 28c, a slider 28e provided with an engaging member 28d that engages with the spiral groove of the lead screw 28b, a guide rod 28g for restricting the moving direction of the slider 28e, and an optical head 24, and is integrated with the slider 28e. And a mounting table 28f that is formed integrally. The lead screw 28b and the guide rod 28g are arranged such that the longitudinal direction thereof is the front-back direction of the disc device 1A.

In such an optical head moving mechanism 28, the engaging member 2 is inserted into the spiral groove of the lead screw 28b.
Since 8d is engaged, when the lead screw 28b rotates in a predetermined direction by driving the motor 28a, the slider 28e moves along the guide bar 28g.
The optical head 24, which is fixed to the mounting table 28f, moves in the radial direction of the optical disc 3 mounted on the disc tray 4 by moving in the front-back direction of A.

The drive of the motor 28a is controlled by the control means (CPU) 50 provided in the main circuit board assembly 12.

The base 23 is supported on the chassis 20 via an insulator 29a, which is a vibration absorbing means made of an elastic body (rubber or the like), at the rear end (the inner side of the apparatus main body 2). Therefore, the base 23 can be displaced in any direction within the range of elastic deformation of rubber around the installation location of the insulator 29a. Insulators 29b and 29c as vibration absorbing means are also provided on both front sides of the base 23. These insulators 29b and 29c are formed with arms 35a and 35b of a base lifting member 35 of a moving mechanism 30 described later. Are connected to the respective connected portions. As described above, the disk device 1A has a structure in which the base 23 of the mechanism unit 22 is supported by the chassis 20 via the three insulators 29a, 29b, and 29c.
The influence of vibration transmitted from 0 to the base 23 can be minimized. As a result, a seismic design is performed to prevent the optical head 24 and the like from being affected by vibration.

These insulators 29a, 29b,
Each of the 29c is formed in a substantially cylindrical shape having an axial opening 290 as shown in FIG. A circumferential constriction is partially formed on the upper and lower portions of the outer peripheral surface of each insulator. And the insulator 2
In the case of 9a, the base 2 is provided through the constricted portion on the upper side.
3 is attached to the rear end of the chassis 3 and is connected to the chassis 20 via a constricted part at the bottom thereof. On the other hand, each of the insulators 29b and 29c is also attached to both sides of the base 23 through the upper constricted portion, and is also connected to the connecting portions of the arms 35a and 35b of the base elevating member 35 through the lower constricted portion. It is connected.

The moving mechanism (vertical movement mechanism) 30 is constructed so as to pivot the front portion of the base 23 at least in the vertical direction about the insulator 29a. Specifically, the moving mechanism 30 includes a front portion of the base 23 of the mechanism unit 22 and the turntable 26.
Is a first position where the disc can be fitted with the disc 3 (a raised position when the disc device is placed horizontally), and a second position distant from the disc in a direction away from the disc, that is, below the first position. The second position (lowering position) is moved.

This moving mechanism 30 is a motor (driving source) provided on the front side of the chassis 20 and capable of forward / reverse rotation.
31, a deceleration mechanism 32 that decelerates and transmits the rotation of the motor 31, a cam wheel (elevating gear member) 33 that is rotated via the deceleration mechanism 32, and a displacement (rotation) that occurs as the cam wheel 33 rotates. And a base elevating member 35 which moves).

The deceleration mechanism 32 has a substantially frustoconical roller 32a fixed to the tip of the rotary shaft of the motor 31, and a wheel 32b having a cap-shaped rubber sheet which is in close contact with the outer peripheral conical surface of the roller 32a. Large gear 3 that meshes with a pinion gear (not shown) provided under the wheel 32b
2c and a small gear 32d coaxially fixed on the upper part of the large gear 32c. The rotation of the motor 31 is reduced by the reduction mechanism 32 at a predetermined reduction ratio and transmitted to the cam wheel 33.

As shown in FIG. 3, the cam wheel 33 is
Lower gear 3 that meshes with the small gear 32d of the reduction mechanism 32
3a and an upper gear 3 that meshes with a rack gear 4b formed on the back surface (lower surface) of the disc tray 4 along the front-rear direction.
3b and. A cam groove 34 is formed along the circumferential direction on the outer periphery of the shaft between the gears 33a and 33b. The cam groove 34 is formed between the lower gear 33a and a lower cam groove 34a formed between the flange 331 and the lower gear 33a formed between the gears 33a and 33b, and between the flange 331 and the upper gear 33b. Upper cam groove 34b,
It is configured with an inclined cam groove 34c that connects both cam grooves 34a and 34b. In this case, the upper cam groove 34b is formed over substantially the entire circumference of the cam wheel 33, and the lower cam groove 34a has a center angle of 10 to 10 on the cam wheel 33.
It is formed in an angle range of about 45 °.

On the other hand, the base elevating member 35 is located between the cam wheel 33 and the base 23, as shown in FIG. The base elevating member 35 is formed by integrally forming a pair of arms 35a and 35b arranged substantially in parallel with each other and a connecting portion 35c connecting their ends, and has a substantially C-shape as a whole. I am doing it. Connection part 3
Shafts 35d and 35e are formed at both ends of the 5c so as to project therefrom, and these shafts 35d and 35e are rotatably supported by the chassis 20. Therefore, the base elevating member 35 rotates about the shafts 35d and 35e, and the arms 35a and 35b also move along with the shafts 35d and 35e.
Rotate around 5e.

Further, on the base elevating member 35, the cam wheel 3 is provided on the side opposite to the extending side of the arms 35a and 35b.
A follower (following member) 36 having a protruding shape that engages with the cam groove 34 of No. 3 is formed in a protruding manner. As shown in FIG. 3, a sphere 361 is formed at the tip of the follower 36, and the sphere 361 is inserted into the cam groove 34.
With the rotation of, the cam groove 34 slides in the cam groove 34.

When the follower 36 is engaged with the upper cam groove 34b, the arms 35a and 35b are connected to the shaft 35.
When the follower 36 engages with the lower cam groove 34a via the inclined cam groove 34c as the cam wheel 33 rotates, the follower 36 engages with the lower cam groove 34a.
The arms 35a and 35b move to positions that are pivoted upward about the shafts 35d and 35e.

Base elevating member 3 constructed as described above
As described above, the insulators 29b and 29c attached to the connecting portions formed on both front side portions of the base 23 are connected to the arms 35a and 35b of the No. 5, respectively. Therefore, the base 23 of the mechanism unit 22 has its center around the position of the insulator 29a on the back side of the apparatus body 2 as the arms 35a and 35b of the base elevating member 35 move up and down as the cam wheel 33 rotates. The front portion has a first position (upper position) where the turntable can be fitted to the disc on the disc tray, and a second position separated from the first position in a direction away from the disc, that is, a position below the first position. It is designed to move between (lower position).

Further, as shown in FIG. 2, the chassis 2
The base is attached to a substantially central portion of 0 so that the base 23 moves along a correct path when the base moves between the first position and the second position. It has a biasing means 19 for biasing. This biasing means 19
Is a part of the guiding means of the present invention, and specifically, a mounting portion mounted on the chassis 20 with a screw, and a substantially U-shaped elastic piece integrally formed with the mounting portion. (Leaf spring). A part of the elastic piece is always in contact with the side portion of the base 23 without hindering the movement of the base 23. The elastic means 19 is located below the base 23 when the disk device is used in a vertical position, and always biases the base 23 from the lower side to the upper side.
As a result, when the base 23 moves between the first position and the second position in a state where the disk device is used vertically, the insulators 29a, 29 are driven by the weight of the base 23.
It is possible to prevent the movement paths of the turntable 26 from deviating due to the deformation of b and 29c.

As shown in FIG. 1, the disc tray 4 has a shallow concave disc placing portion 4a, and the optical disc 3 is placed on the disc placing portion 4a, and the position is regulated as desired. It is transported in the state where it was processed.

As shown in FIG. 4, a rack gear 4b that meshes with the upper gear 33b of the cam wheel 33 is formed on the back surface of the disc tray 4. As a result, the disc tray 4 moves in the front-rear direction with respect to the apparatus main body 2 between the loading position of the optical disc and the ejection position of the optical disc as the cam wheel 33 rotates. Then, in the loading operation of the optical disc 3, the cam wheel 33 rotates clockwise in FIG. 2, whereby the disc tray 4 moves rearward, and the disc 3 is carried into the apparatus main body 2.
In addition, as described above, the base 23 of the mechanism unit 22 is
Between the first and second positions of the cam wheel 3
This is due to the vertical movement of the base elevating / lowering member 35 accompanying the rotation of the disk 3. Therefore, the movement of the disc tray 4 between the ejection position and the loading position is interlocked with the movement of the base 23 between the first position and the second position. Will be done.

On the back surface of the disc tray 4,
As shown in FIG. 4, the disc tray 4 is an optical disc 3
Openings 29 of the insulators 29b and 29c provided on both front sides of the base 23 of the mechanical unit 22 that has moved up from the second position to the first position when moved to the first loading position.
A pair of guide protrusions 4c are integrally formed at positions where they can be inserted into the respective 0s.

As shown in FIG. 6, each of the guide protrusions 4c is formed in a substantially cylindrical shape having a diameter slightly smaller than the diameter of the opening 290 of the insulators 29b and 29c.
By being inserted into the opening 290, the movement of the base 23 from the second position to the first position can be guided in cooperation with the opening 290. In addition, the tip of the guide protrusion 4c is chamfered so as to be tapered toward the tip in order to facilitate entry of the insulators 29b and 29c into the opening 290.

The length of the guide protrusion 4c in the axial direction is not particularly limited, but at least in the state where the disc device 1A is used in a vertical position, the disc tray 4 can be used.
When the base 23 moves from the second position to the first position when the turntable 26 fits on the disk 3 on the disk tray 4 which has reached the loading position, the guide projection 4c is inserted into the insulator. It is necessary to have a length that can be inserted into the openings of 29b and 29c,
For example, the length is set to about 5 mm to 1 cm.

The pair of guide projections 4c and the openings of the insulators 29b, 29c constitute the guide means of the present invention, in which case the guide projections form the first means of the guide means and the insulator 29b. , 29c form the second means.

In this embodiment, the first means is provided with the pair of guide projections 4c as described above. However, one of the guide projections 4c, preferably when the disk device is vertically installed. Alternatively, only the guide protrusion located on the upper side may be used.

According to the disc device 1A as described above, even when the disc device is used in a vertically installed state, the base 23 of the mechanism unit 22 is moved in the process of moving from the second position to the first position. In addition to the urging means 19, a guide protrusion 4c provided on the back surface of the disc tray 4 which has moved from the ejecting position to the loading position is inserted into the openings 290 of the insulators 29b and 29c of the base 23 and guided. . Therefore, even if the weight of the components of the mechanical unit 22 or the weight of the disk 3 when the turntable 26 is engaged with the disk 3 is applied to the base 23, the correct movement path of the turntable 26 is not affected.

Next, the operation of the disk device 1A will be described.

When the disc device 1A is not used, the empty disc tray 4 is in a state of being accommodated in the device body 2 (disc loading position). In this state, the base 23
Is located at the first position (elevated position), and the guide protrusion 4a provided on the back surface of the disk 4 has an opening 290 for the insulators 29b, 29c provided on the base 23.
It has been fitted to.

When an eject operation is performed in this state, the motor 31 rotates in a predetermined direction, and the cam wheel 33 rotates counterclockwise in FIG. 2 via the speed reduction mechanism 32. With the rotation of the cam wheel 33, the follower 36 of the base elevating member 35 located in the lower cam groove 34a moves up the inclined cam groove 34c and moves to the upper cam groove 34b. As a result, the follower 36 is displaced upward, the base elevating member 35 rotates about the shafts 35d and 35e, and the arm 3
5a and 35b swing downward. This arm 35a, 3
With the swing of 5b, the front portion of the base 23 pivots about the position of the insulator 29a via the insulators 29b and 29c connected to the respective arms, and the base 23 moves to the second position (down position). To do. This base 2
The guide protrusion 4a provided on the back surface of the disc tray 4 is disengaged from the openings of the insulators 29b and 29c of the base 23 in accordance with the movement operation of the disc 3 from the first position to the second position.

On the other hand, the rotation of the cam wheel 33 causes the upper gear 33b and the rack gear 4b on the back surface of the disc tray 4 to mesh with each other.
Moves from the loading position toward the front of the disc device, passes through the openings 141e and 16a, and moves to a position (disc ejection position) protruding outward from the device body 2.

In this state, the optical disk 3 is mounted on the disk mounting portion 4a of the disk tray 4 which has been pulled out,
When the loading operation is performed, the motor 31 rotates in the opposite direction, and the cam wheel 33 rotates clockwise (reverse rotation) in FIG. 2 via the speed reduction mechanism 32. Along with this, the disc tray 4 moves to the inside of the disc device, and the opening 141
e, 16a to move to the disc loading position. As a result, the optical disc 3 placed on the disc tray 4 while being positioned is also conveyed to the disc loading position in the apparatus main body 2.

On the other hand, when the reverse rotation of the cam wheel 33 is started, the follower 36 of the base elevating member 35 is moved.
Moves along the upper cam groove 34b, and when the center of the optical disk 3 approaches the center hub portion 26a of the turntable 26, the follower 36 moves down the inclined cam groove 34c,
It moves to the lower cam groove 34a. As a result, the follower 36 is displaced downward, and the base elevating member 35 moves toward the shaft 35d,
The arm 35a, 35b swings to a raised position by rotating about 35e. As the arms 35a, 35b swing, the insulators 29b, 29 connected to the respective arms
The front portion of the base 23 is connected to the insulator 2 via the c
9a pivots about the position of 9a,
Lifted toward the position, the mechanical unit 22 is in a substantially horizontal state.

While the base 23 moves from the second position to the first position, the biasing means 19 is maintained in contact with the side portion of the base 23. Further, when reaching at least the first position, the guide protrusion 4c on the back surface of the disc tray 4 which has reached the loading position is inserted into the openings 290 of the insulators 29b and 29c provided in the base 23,
After that, the guide protrusion 4c and the opening 290 cooperate with each other to guide the movement of the base 23 along the guide protrusion 4c.

As a result, even when the disc device is used in a vertical position, the base 23 is urged by the urging means 19.
Urging force of the disc tray 4 and the guide protrusion 4 of the disc tray
By fitting c with the openings of the insulators 29b, 29c, the relative movement in the vertical direction between the disk tray 4 and the disk tray 4 is guided to the first position. Therefore, during the movement of the base 23 from the second position to the first position,
There is no possibility that the insulator deforms due to the weight of components such as the turntable and the spindle motor, the movement path of the turntable 26 shifts, and the positional shift between the turntable 26 and the center hole 3a of the disk 3 does not occur.

As a result, the center hub portion 26a of the turntable 26 is accurately fitted in the center hole 3a of the optical disc 3, and the turntable 26 supports and lifts the central portion of the disc 3. Thus, even when the center hub 26a of the turntable 26 is fitted into the center hole 3a of the disc 3 and the own weight of the disc 3 is applied to the base 23, the movement of the base 23 is guided by the guide protrusion 4c of the disc tray 4. Therefore, the movement route of the turntable 26 does not shift.

The disc clamper 38 rotatably supported on the lower surface of the top plate portion 14a of the case 14 is magnetically attracted to the turntable 26, and the disc clamper 3
The optical disc 3 is sandwiched between the turntable 8 and the turntable 26. As a result, the disc 3 supported by the turntable 26 is reliably clamped by the clamper 38, and even when the disc device is used in a vertical position, a defective clamping or a rubbing of the disc recording surface due to it is prevented.

When the optical disc 3 is mounted at the disc loading position as described above, the spindle motor 25
Is activated and the optical disk 3 rotates at a constant speed. Further, the optical head 24 is moved to a predetermined position by the optical head moving mechanism 28, and the optical head 24 emits light onto the recording surface of the optical disc 3 while performing tracking control and focus control.
Light is received to reproduce the information recorded on the optical disc 3.

When the reproduction is stopped and the eject operation is performed,
Each mechanism of the disc device 1A operates in the same manner as the eject operation described above, and the disc 3 is released from the clamp, placed on the disc tray 4, and ejected.

Although the disk device of the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to this. For example, a guide recess that can be engaged with the guide projection 4c of the disc tray 4 is formed in a part of the base 23 separately from the insulators 29b and 29c, and the base 23 extends from the second position to the first position through the recess. You can also guide the movement.

Further, for example, as shown in FIG. 7, a guide protrusion is formed on the side of the base 23 of the mechanism unit, and a guide concave portion to which the guide protrusion is fitted is formed at a position on the back surface of the corresponding disc tray 4. May be.

Further, the insulators 29b, 29
If the opening 290 of c and the above-described guide recess are formed to be elongated in the front-rear direction of the base 23, the movement of the base 23 from the second position to the first position can be guided over a longer distance.

Further, the guide means of the present invention can be constituted by only the biasing means or the guide projection and the guide recess.

Finally, it should be noted that the present invention is not limited to the above-mentioned embodiments, but various improvements and modifications can be made within the scope of the claims set forth in the claims.

[0076]

As described above, according to the present invention, when the base moves from the second position to the first position, the base moves while being guided by the guide protrusions on the back surface of the disc tray. Even if the disc is fitted to the disc and the disc's own weight acts on the disc, the movement path of the turntable does not shift. As a result, even if the disk device is used vertically, there will be no problems such as defective clamping.

Further, the above-mentioned guide protrusion can be easily manufactured by integral molding on the back surface of the disc tray, and neither the number of parts nor the manufacturing cost is increased.

Further, if the opening of the insulator on the base side is used for the receiving side of the guide protrusion, there is an advantage that the existing design can be used as it is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a disk drive according to the present invention.

FIG. 2 is a plan view of the disk device shown in FIG.

3 is a perspective view showing a configuration of a cam wheel in the disc device shown in FIG. 1. FIG.

4 is a bottom view showing the configuration of the back surface of the disc tray in the disc device shown in FIG. 1. FIG.

5 is a cross-sectional view of an insulator in the disc device shown in FIG.

FIG. 6 is a partial cross-sectional view of guide means according to the present invention,
The state where the guide protrusion is fitted in the opening of the insulator is shown.

FIG. 7 is a cross-sectional view showing a modified example of the guide means according to the present invention.

FIG. 8 is a side view of a conventional disc device when an optical disc is ejected.

FIG. 9 is a side view of the conventional disc device during optical disc reproduction.

[Explanation of symbols]

 1A, 1B Disc device 2 Device body 3 Optical disc 3a Center hole 4 Disc tray 4a Disc mounting portion 4b Rack gear 4c Guide protrusion 11 Bottom plate 12 Main circuit board assembly 13 Mechanism assembly 14 Case 14a Top plate portion 14b, 14c Side plate portion 14d Back plate part 14e Front plate part 141e Opening 15 Frame 16 Front bezel 16a Opening 19 Energizing means 20 Chassis 20a Bottom part 20b Wall part 21 Recess 22 Mechanical unit 23 Base 231 Opening 24 Optical head 25 Spindle motor 26 Turntable 27 Optical head 28 Optical Head moving mechanism 28a Motor 28b Lead screw 28c Reduction gear train 28d Engaging member 28e Slider 28f Mounting table 28g Guide rods 29a, 29b, 29c Insulator 290 Opening 30 Moving mechanism (Vertical movement mechanism) 31 Motor 32 Reduction mechanism 32a Roller 32b Wheel 32c Large gear 32d Small gear 33 Cam wheel 331 Flange 34a Lower cam groove 34b Upper cam groove 34c Inclined cam groove 35 Base lifting members 35a, 35b Arm 35c Connecting portion 35d , 35e Shaft 36 Follower 361 Sphere 37 Recess 38 Disc clamper 50 Control means

Claims (9)

[Claims] 1. A base having a turntable for rotating a disc, a first position at which the turntable can be fitted to the disc, and a direction in which the turntable separates from the disc with respect to the first position. A moving mechanism for moving the disc between a second position separated from the first position and a moving mechanism for moving the first end of the base from the second position to the first position. A tray, and at least one end of the base from the second position to the first
From the second position of the base to the first position when reaching the position
And a guide means for guiding the movement to the position, the guide means having a first means provided on the base and a second means provided on the disk tray. 2. The guide means further constantly biases the base so that the base moves along a correct path when the base moves between the first position and the second position. 2. An urging means to activate the urging means.
The disk device as described above. 3. The second means has at least one engaging protrusion provided on the back surface of the surface of the disk tray on which the disk is placed, and which is capable of cooperating with the first means. The disk device according to claim 1 or 2. 4. The base has at least one vibration absorbing means connected to the moving mechanism,
4. The disk device according to claim 3, wherein means are provided on the vibration absorbing means so as to cooperate with the at least one engagement protrusion. 5. The disk device according to claim 4, wherein the first means is an opening into which the at least one engagement protrusion formed in the vibration absorbing means can be inserted. 6. The disk device according to claim 5, wherein the at least one engagement protrusion has a chamfered taper portion at a tip portion thereof. 7. The second means is configured to be engageable with the first means of the base located at the first position when the disc tray is located at the loading position. The disk device according to claim 1 or 2. 8. A base provided with a turntable for rotating a disc, the base being pivotally provided on a chassis via a vibration absorbing member and having a rear end as a center, and the front end of the base having the turntable as a turntable. A moving mechanism for pivoting the rear end as a center between a first position at which the disc can be fitted and a second position separated from the first position in a direction away from the disc, and a front end of the base. When the disc device is used in a vertically installed state, the base moves to the first position when the disc device is used in a vertical position. A disc device comprising: a guide unit that guides the base plate and the disc tray while restricting relative movement in the vertical direction when moving from the second position to the first position. . 9. A base provided with a turntable for rotating a disc is provided with a first position where the turntable can be fitted to the disc and a second position which is separated from the disc in a direction away from the first position. And a disc tray on which a disc is placed so as to move from a disc ejection position to a disc loading position in conjunction with movement of the base from the second position to the first position. In the disk device, the base is the second
A guide method for a turntable in a disc device, which guides the base through a part of the disc tray so that the turntable moves along a correct movement path when moving from a position to a first position. .