JPH11288541A - Disk transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothen the opening/closing movement of a disk guide part. SOLUTION: The device is composed of disk transfer means 20, one of which is formed with a driving belt 29 for driving the peripheral edge of the disk, while moving for opening/closing between the clamping position for clamping the disk and the retreating position for retreating from the disk under reproduction, a driving motor 50 for producing the driving force of the driving belt 29, and a transmission means 60 for transmitting the driving force of the driving motor 50 independently of the opening/closing movement of the disk transfer means 20, then the driving belt 29 is driven in the loading direction when the disk transfer means 20 is moved to the clamping position from the retreating position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk transfer device for transferring disks having different diameters to a predetermined position.

[0002]

2. Description of the Related Art The applicant of the present invention has proposed a disk transfer mechanism using an endless drive belt in Japanese Patent Application Laid-Open No. Hei 8-241553. FIGS. 1 to 4 show schematic plan views of a disk reproducing apparatus 100 provided with the disk transport mechanism 20. FIG.

[0003] The disk transport mechanism 20 includes a disk guide section 22 provided on the left side of the apparatus and having a drive belt 29;
It is composed of a disc guide section 32 provided on the right side of the apparatus and having a fixed belt 36. Further, both disc guide portions 22 and 32 are connected by a pinion gear 43, and can be opened and closed in directions facing each other.

The drive of the drive belt 29 is performed by the main chassis 1
The driving is performed by a driving motor 50 fixedly disposed at 0 and generating a driving force of the driving belt 29. The driving force is disposed between the driving belt 29 and the driving motor 50, and is a transmission means for transmitting the driving force irrespective of a change in the relative positional relationship between the driving belt 29 and the driving motor 50 due to the insertion of the disk. 6
0 is transmitted.

When the disk guides 22 and 32 open and close, the plates 62 and 63 that support the gear train are
It moves while changing the shape using the shaft 52 as a fixed shaft (FIG.
See FIG. 8). At this time, the gear train rotatably supported by the plates 62 and 63 respectively rotates, so that the plates 62 and 6 are rotated.
3 can be changed. Therefore, since the drive pulley 27 around which the drive belt 29 is stretched also rotates, the drive belt 29 must move while rotating. For this reason, a frictional force is generated at the contact portion between the drive belt 29 and the disc guide portion 22, and there is a problem that the opening and closing movement of the disc guide portion is not smooth.

However, in the prior art, since only the 12 cm disc was supported, both disc guide portions 22 and 3 were used.
2. The distance for opening and closing movement is small. Therefore, the rotation of the drive belt 29 is not started by a change in the transmission means 60 to a certain extent due to the backlash present in each gear of the transmission means 60 and the play of mounting each gear. Therefore, the disk guide portions 22 and 32 are smoothly opened and closed.

[0007]

When the disc reproducing apparatus 100 is capable of transferring discs having diameters of 8 cm and 12 cm, both disc guide portions 22 and 32 are 8c.
m disk receiving position (between belts 76mm) and 12cm
Evacuation position during disc playback (128 m between belts)
m). At this time, the transmission means 60 is moved to the position shown in FIG.
m) and the position shown in FIG. 8 (128 mm between belts).

Therefore, when the disk is held between 128 mm and 8 cm between the belts, the movement of both disk guides in the closing direction becomes large and cannot be absorbed by the backlash existing in each gear train described above. Therefore, the driving belt 2
Since the transmission means 60 cannot be moved unless the rotating member 9 is rotated, the movement of both disc guides in the closing direction is not smooth.

[0009]

According to a first aspect of the present invention, there is provided a disk transfer apparatus comprising: a disk drive unit which is driven by a drive motor when a relative positional relationship of a disk transfer unit changes from an open state to a closed state; Drive the disk drive. Due to the driving force of the drive motor, the disk transfer means is urged in the closing direction, and the movement in the closing direction becomes smooth.

Further, in the disk transfer device according to the second aspect of the present invention, before the relative positional relationship of the disk transfer means changes from the open state to the closed state, the drive motor 50 is rotated to apply backlash to the gear train. When the relative positional relationship of the disk transfer means changes from the open state to the closed state due to the backlash, the disk drive does not need to rotate, and the movement of the disk transfer means in the closing direction is smooth.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment to which the present invention is applied will be described below with reference to FIGS.

FIG. 1 is a schematic plan view of the disk reproducing apparatus 100 when the disk transfer mechanism 20 is in a disk receiving state. The disk reproducing device 100 has a main chassis 1
0, a front panel 12, and a loading chassis 14. The front panel 12 has an insertion opening 12A for inserting and removing a disk. A plurality of guide grooves 14A for guiding the disk transfer mechanism 20 are formed in the loading chassis 14 disposed on the upper surface of the apparatus.

The disk transfer mechanism 20 comprises a disk guide section 22 disposed on the left side of the apparatus and a disk guide section 32 disposed on the right side of the apparatus. Both disc guide portions 22 and 32 are suspended by the loading chassis 14 and can be moved in the left and right directions by being guided by the guide grooves 14A. Further, the two disk guide portions 22 and 32 can be moved in opposing directions by being connected by a pinion gear 43.

The disk guide portions 22 and 32 are biased by the spring 41 in the direction of approaching each other. Therefore, in the disk receiving state, the positioning is performed at a distance shorter than the diameter of the small-diameter disk d (see FIG. 1), and the distance between the drive belt 29 and the fixed belt 36 is 76 mm.

Further, at the time of disc reproduction, a cam 47 is provided to evacuate both disc guide portions 22, 32, and the cam 47 is driven by the evacuating mechanism M1. The rotation of the cam 47 engages with the pin 25A erected on the lower surface of the disk guide 22, and the distance between the drive belt 29 and the fixed belt 36 is wider than the diameter of the large-diameter disk D (see FIG. 4), and the distance between the drive belt 29 and the fixed belt 36 is 128 mm.

FIG. 9 shows the structure of the disk guide portions 22 and 32.
This will be described with reference to FIG. The disk guide section 22 disposed on the left side of the apparatus includes a loading plate 24 and a disk guide 25. Disc guide 25
Has a U-shaped cross section to guide the periphery of the disk (see FIG. 10) to prevent the disk from falling off during transfer. A drive pulley 27 and a driven pulley 28 are disposed at both ends of the disc guide portion 22, and an endless drive belt 29 is stretched between the pulleys. Drive belt 29
Is made of a material having a high coefficient of friction and functions as a disk drive for driving the periphery of the disk. On the upper surface of the loading plate 24, a plurality of pins 24A are formed to pass through the guide grooves 14A. Further, a pin 25A that engages with the cam 47 is formed on the lower surface of the disc guide 25.

On the other hand, a disk guide 32 is disposed on the right side of the apparatus facing the disk guide 22. The disk guide 32 includes a loading plate 34 and a disk guide 35. The cross section of the disk guide 35 has a U-shape. A fixing belt 36 is fixed at a position where the fixing belt 36 is engaged with the outer peripheral surface of the disk. Also,
A disk introduction portion 35A made of a resin material having a low coefficient of friction is formed on the front side of the disk guide 35 in the apparatus. Further, a plurality of pins 34A are formed on the upper surface of the loading plate 34 to pass through the guide grooves 14A.

A mechanism for rotating the drive belt 29 will be described with reference to FIGS. A drive motor 50 for generating a driving force for rotating the drive belt 29 is fixedly disposed on the main chassis 10 and has a worm gear 5 on its output shaft.
1 is attached. The gear member 53 is supported by the main chassis 10 by a shaft 52. A gear 53A formed on the lower surface of the device meshes with the worm gear 51, and a gear 53B formed on the upper surface of the device is connected to the gear 55. Are engaged.

The driving force of the gear 53B is a plate 62,
The drive belt 2 is transmitted by a gear train supported by
9 drives the driving pulley 27 on which it is stretched. This is achieved by the following configuration. The plate 62 is rotatably supported on a shaft 52. A plate 63 is rotatably supported on the other end of the plate 62 about a shaft 54. At the other end, a shaft 58 that supports the drive pulley 27 is provided. The drive pulley 27 is formed with a gear portion 27A that meshes with the gear 57 on the lower surface of the device, and the drive belt 29 is stretched on the upper surface of the device. A plurality of gears 55, 56, 57 serving as transmission elements are pivotally supported on the upper or lower surfaces of the plates 62, 63 serving as support members, and transmit the driving force of the gear member 53 to the drive pulley 27. I do.

With the above configuration, both disc guides 2
The plates 62 and 63 are rotated by the shaft 5
2 so that the drive belt 2
Transmission means 60 for transmitting the driving force of the drive motor 50 regardless of the change in the relative positional relationship between the drive motor 9 and the drive motor 50 is configured.

Here, the transmission means 60 includes a drive motor 50.
To rotate about the shaft 52 fixed to the main chassis 10. In addition, the drive belt 29 is restricted to translation only because the disk guide portion 22 supported by the shaft is guided by the guide groove 14A of the loading chassis 14. Therefore, when the drive belt 29 is rotated counterclockwise to load the disk, the gear member 53 is driven to rotate counterclockwise, and the drive belt 29 is urged to the right side of the apparatus while rotating. Similarly, when the drive belt 29 is rotated clockwise to eject the disk, the gear member 53 is driven to rotate clockwise.
The drive belt 29 is urged to the left side of the apparatus while rotating.
However, the force applied to the left side of this device is
Since the urging force of the spring 41 for urging the discs 2 and 32 in the closing direction is weaker, the holding of the disk does not come off.

This can be used for the purpose of smoothing the movement of both disc guide portions 22 and 32 in the closing direction (first embodiment). That is, the disk guide 2
When the belts 2 and 32 move in the closing direction, the drive belt 29 is driven to rotate in the disk loading direction. Then, as described above, the driving belt 29 generates an urging force to move the right side of the apparatus, that is, both the disc guide portions 22 and 32 in the closing direction while rotating. Therefore, the disc guide 2
2, 32 achieves a smooth movement in the closing direction.

On the other hand, when the disk guides 22 and 32 move in the closing direction, the plates 62 and 63 move while changing the shape using the shaft 52 as a fixed shaft (see FIGS. 5 to 8). At this time, the gear trains supported by the plates 62 and 63 rotate, respectively, so that the relative positional relationship between the plates 62 and 63 can be changed. Therefore, when the disk guides 22 and 32 move in the closing direction, the drive belt 29 moves while rotating clockwise. Therefore, the rotational movement of the drive belt 29 is required in accordance with the movement of the disk guides 22 and 32 in the closing direction, and a frictional force is generated at the contact portion between the drive belt 29 and the disk guide 22. In addition, the opening and closing movement of the disk guide cannot be performed smoothly.

The meshing portion of each gear is provided with a backlash in order to prevent teeth from creaking with each other due to gear manufacturing errors and deformation of the gear during movement, thereby preventing smooth movement. ing. Since the transmission means 60 of this embodiment is composed of a plurality of gear trains, the total amount of backlash existing in each gear increases. Therefore, by effectively applying this backlash to the gear train, it can be used for the purpose of smoothing the opening and closing movement of both disc guides 22, 32 (second embodiment). This is performed by performing the following operation control.

Both disc guides 2 are moved by the retracting mechanism M2.
When the distance between the belts 2 and 32 is 128 mm, the driving belt 29 is rotated in advance in the direction of ejecting the disk. As a result, the backlash generated in each gear constituting the transmission means 60 is 0 in the ejection direction.
And it is maximum in the loading direction. Next, the drive belt 29 is rotationally driven by a predetermined amount in the loading direction. By these operations, a certain amount of backlash can be given in the ejecting direction of the disk with respect to the backlash amount which varies for each device. By this predetermined amount of backlash, the drive pulley 27 provided at the forefront of the transmission means 60 can move to the right side of the apparatus without rotating the drive belt 29 in the ejecting direction. Accordingly, the spring 41 can smoothly move in the closing direction even with a weak urging force.

Further, in order to reproduce the disc transferred by the disc transfer mechanism, the disc reproducing apparatus 100
An optical mechanism 70 is provided. The optical mechanism 70 includes an optical pickup 71, a turntable 77, an optical base 75 on which each element is arranged, and the like. The optical pickup 71 is driven from the inner circumference to the outer circumference of the disk mounted on the turntable 77, and optically reads information recorded on the disk. The turntable 77 is loaded with a disc brought to a reproduction position by the disc transfer mechanism 20 and is driven to rotate by a spindle motor. Further, the optical mechanism 70 is driven up and down by a vertical mechanism M2,
The disc is brought to a retracted position (DOWN position) where it does not come into contact with the transfer surface of the disc, and to a reproduction position (UP position) where the disc is mounted on the turntable 3 and can be reproduced.

<< Operation Control Diagram >> FIG. 13 shows an operation control diagram of the disk reproducing apparatus 100.

The optical pickup 71 is controlled by a known servo control such as a tracking servo and a focus servo, and optically reads information recorded on a disk. The read signal is amplified by the RF amplifier 72 and then input to the signal processing circuit 73. The output of the RF amplifier 72 is input to a servo circuit 75. The servo circuit 75 drives the spindle motor 76 to rotate based on a synchronization signal extracted from the input signal.

The system controller 90 has a disk insertion detecting sensor 9 for detecting that a disk has been inserted.
5. A reproduction position detection sensor 96 for detecting that the disk has been brought to the reproduction position, an ejection position detection sensor 97 for detecting that the disk has been brought to the ejection position, and various mechanism position detection sensors (not shown). ) Is input, and an operation flow described later is performed.
The required command is output to the signal processing circuit 73, the servo circuit 75, and the driving circuits 81, 82, 83 based on the data.

The driving circuits 81, 82 and 83 are driven by respective driving modes in accordance with instructions from the system controller 90.
, The retracting mechanism M1, the up-and-down mechanism M2.

<< Loading Operation >> Disk Reproducing Apparatus 1
00 will be described with reference to the flowchart shown in FIG.

In the disk receiving state shown in FIG. 1, the drive motor M1 is not driven, and the retraction mechanism M1 and the up-and-down mechanism M2 are not driven. The disk transfer mechanism 20 is driven by the spring 41 so that the small-diameter disk d
It is positioned narrower than the diameter of the
It has been. Incidentally, the optical mechanism 70 is positioned at a retreat position which does not hinder the transfer of the disk.

In this state, the disc is inserted into the insertion slot 1 formed in the front panel 12 by manual operation of the user.
2A, the outer peripheral surface of the disk firstly has a drive belt 29 on the left side of the apparatus and a disk introduction section 35A on the right side of the apparatus.
At two points. When the user further pushes the disk in this engaged state, the disk slides against the introduction wall 35A, which is a material having a low friction coefficient, and the insertion force resists the bias of the springs so that the two disk guide portions are opposed to each other. 2
Spread out 2,32.

When the increase in the distance between the two disk guide portions 22 and 32 is detected by the disk insertion detection sensor 95 (S1), the driving of the drive motor 50 is started to start loading. The drive belt 29 is driven to rotate counterclockwise (S2). Accordingly, the drive belt 29 drives the outer peripheral surface of the disk, and the disk is loaded while rotating clockwise.

When the reproduction position detection sensor 96 detects that the disk has been brought to the reproduction position (S
3) The driving of the driving motor 50 is stopped (S4). Next, the optical mechanism 70 is brought to the UP position by the vertical mechanism M1 to clamp the disk, and the disk is clamped by the clamp mechanism and the turntable 77 (not shown) (S5).

When the clamping is completed, the cam 47 is driven by the retracting mechanism M1, and the cam 47 and the disc guide portion 22 are moved.
By the engagement with the pin 25A formed on the lower surface of the disk guide portion 22, the space between the disk guide portions 22 and 32 moves in the opening direction (S6).
At this time, the distance between the belts is 12 as shown in FIG.
8 mm, which does not hinder reproduction of the large-diameter disk D. Thereafter, the spindle motor 76 starts to rotate at a predetermined number of revolutions, and the reproduction of the disc is started (S7).

<< Eject Operation >> Disk Playback Device 10
The ejecting operation of the disc in the clamped state of 0 will be described with reference to a flowchart shown in FIG. This ejecting operation allows the disc guides 22, 32 to move smoothly in the closing direction by rotating the drive belt 29 when the disc guides 22, 32 move in the closing direction.

With the disk clamped,
When the eject operation of the disc is performed by the operation of the eject key (not shown) (S11), the retracting mechanism M1 is operated.
Rotates the cam 47 so that the disc guide portion 22
Is released (S12). When the engagement is released, the disk guide portions 22 and 32 try to move in the closing direction by the urging force of the spring 41, but do not close smoothly because the spring urging force is weak.

In the same manner as when the engagement of the cam 47 is released in step S12, the drive of the drive motor 50 is started to rotate the drive belt 29 in the loading direction (S1).
3). As described above, when the drive belt 29 is driven to rotate in the loading direction, an urging force is generated to move the disk guides 22, 32 in the closing direction. Accordingly, the disc guide portion 22,
Reference numeral 32 smoothly moves in the closing direction to clamp the disk between the drive belt 29 and the fixed belt 36 (S14).

When the clamping of the disk is completed, the clamp is released by the clamp mechanism, and the optical mechanism 70 is moved to the retreat position by the vertical mechanism M2 (S15). afterwards,
The drive belt 29 is driven in the ejecting direction by the drive motor 50 (S16). When the ejection position detection sensor 97 detects that the disc has been brought to the ejection position (S17), the drive motor 50 stops driving (S17), and the ejection is completed.

<< Second Embodiment of Ejection Operation >> A second embodiment of the ejection operation of the disk in the clamped state of the disk reproducing apparatus 100 will be described with reference to a flowchart shown in FIG. This ejecting operation provides a predetermined amount of backlash in the ejecting direction before the disc guides 22, 32 move in the closing direction, so that the disc guides 22, 32 can move smoothly in the closing direction.

With the disk clamped,
When the disc is ejected by the operation of an eject key (not shown) (S21), first, the drive mode is started.
The drive belt 29 is driven to rotate in the ejecting direction of the disk by the table 50, and the backlash in the ejecting direction is set to 0 (S22). Next, the drive belt 29 is driven to rotate by a predetermined amount in the loading direction (S23). By this processing, a predetermined amount of backlash can be given to each gear in the ejecting direction of the disk. Due to this predetermined amount of backlash, the transmission means 60 can change from FIG. 8 to the shape of FIG. 5 without the drive belt 29 rotating. Therefore, there is no need to consider the frictional force due to the movement of the drive belt 29, and the disc guides 22, 32 can move in the closing direction only by the urging force of the spring 41.

After performing the operation to make the backlash constant, the retracting mechanism M1 releases the engagement with the disk guide portion 22 by rotating the cam 47 (S24).
The disc guides 22 and 32 move smoothly in the closing direction by the urging force of the spring 41, and clamp the disc between the drive belt 29 and the fixed belt 36 (S25).

When the clamping of the disk is completed, the clamp is released by the clamp mechanism, and the optical mechanism 70 is moved to the retreat position by the vertical mechanism M2 (S26). afterwards,
The drive belt 50 is driven in the ejection direction by the drive motor 50 (S27). When the ejection position detection sensor 97 detects that the disk has been brought to the ejection position (S28), the drive motor 50 stops driving (S29), and the ejection is completed.

<< Other Embodiments >> In the second embodiment described above, when a predetermined backlash is given to the gear train of the transmission means 60, the driving belt 29 is driven to rotate in the ejecting direction and then loaded. It was driven to rotate in the direction by a predetermined amount. As a result, a certain amount of backlash can be given in the ejection direction with respect to the amount of backlash that varies for each device. However, the present invention is not limited to this operation control. That is, only the operation control that drives the drive belt 29 in the loading direction to maximize the backlash in the ejection direction may be used.

In the first embodiment, the transmission means 60 composed of a plurality of gear trains is used to transmit the driving force of the driving motor 50 to the driving belt 29. It is not limited to this configuration. For example, various modes can be adopted, such as a configuration using a press-contact pulley or a belt.

Further, in the first and second embodiments, one of the disk transport mechanisms 20 is constituted by the drive belt 29 and the other is comprised of the fixed belt 36, and the disk is transported while rotating the disk. However, the present invention is not limited to this, and it is also possible to configure the disk transfer mechanism with a pair of drive belts.

[0048]

According to the present invention, the opening and closing movement of the disk transfer means can be made smooth.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a disk reproducing apparatus 100 when a disk transfer mechanism 20 is in a disk receiving state.

FIG. 2 is a schematic plan view showing the disc reproducing apparatus 100 when the disc transfer mechanism 20 is transferring a small-diameter disc d.

FIG. 3 is a schematic plan view showing the disc player 100 when the disc transfer mechanism 20 is transferring a large-diameter disc D.

FIG. 4 is a schematic plan view showing the disc reproducing apparatus 100 when the disc transfer mechanism 20 is in a disc reproducing state.

FIG. 5 is a plan view showing the transmission means 60 when the disk transfer mechanism 20 is in a disk receiving state.

FIG. 6 is a plan view showing the transmission means 60 when the disk transfer mechanism 20 is transferring a small-diameter disk d.

FIG. 7 is a plan view showing the transmission means 60 when the disk transfer mechanism 20 is transferring a large-diameter disk D.

FIG. 8 is a plan view showing the transmission means 60 when the disk transport mechanism 20 is in a disk reproducing state.

FIG. 9 is a cross-sectional view of the disc guide section taken along the line CC.

FIG. 10 is a cross-sectional view of the disk guide section taken along line AA.

FIG. 11 is a cross-sectional view of the disk guide section taken along line BB.

FIG. 12 is a sectional view of the disk guide section 32 taken along line DD.

FIG. 13 is an operation control diagram of the disk reproducing apparatus 100.

FIG. 14 is a flowchart showing a loading operation in the disk reproducing apparatus 100.

FIG. 15 is a flowchart showing the ejection operation of the first embodiment in the disc reproducing apparatus 100;

FIG. 16 is a flowchart showing an ejection operation of the second embodiment in the disk reproducing apparatus 100.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main chassis 20 Disk transfer mechanism 22 Disk guide part 27 Drive pulley 28 Follower pulley 29 Drive belt 32 Disk guide part 36 Fixed belt 41 Spring 50 Drive motor 60 Transmission means d Small diameter disk D Large diameter disk M1 Evacuation Mechanism M2 Vertical mechanism

Claims (3)

[Claims] 1. A disk drive unit for driving the disk periphery, wherein at least one of the disk drives drives the disk periphery so as to engage with the disk periphery. , A drive motor for generating a drive force of the disk drive unit, a transmission element for transmitting the drive force output from the drive motor to the disk drive unit, and the transmission element And a support member for supporting the disk drive means. The support member moves in accordance with the change in the relative positional relationship of the disk transfer means, thereby allowing the disk drive unit and the drive motor to change their relative positional relationship. A transmitting means for transmitting the driving force to the disk drive unit; and a drive motor for outputting a signal when the relative positional relationship between the disk transfer means changes. Control means for outputting a drive command to the drive motor so as to generate an urging force for urging the support member in a direction in which the support member moves in accordance with a change in the relative positional relationship of the disk transfer means. A disk transfer device, comprising: 2. The disk transfer apparatus according to claim 1, wherein the relative positional relationship of said disk transfer means is changed by a spring biasing force. 3. A disk transporter having at least one of a disk drive and at least one of a disk drive and a distance substantially equal to the diameter of the insertion disk and larger than the diameter of the insertion disk to engage with the peripheral edge of the disk. A drive motor for generating a driving force of the disk drive unit; a drive motor for generating a drive force of the disk drive unit; A plurality of drive motors disposed between the disk drive and the drive motor for transmitting the driving force of the drive motor to the disk drive regardless of a change in the relative positional relationship between the disk drive and the drive motor; When the relative positional relationship between the transmission means constituted by a gear train and the disc transfer means is substantially equal to the diameter of the insertion disc by the urging force of the urging means, And a control means for outputting a required drive command to the drive motor so as to provide a predetermined backlash to the gear train.