JP3556411B2 - Disc playback device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk reproducing apparatus for reproducing an optical disk such as a CD-ROM disk.
[0002]
[Prior art]
At present, as a disk drive such as a CD-ROM drive, a horizontal front loading type is mainly used. The horizontal front-loading disk drive enables a tray for mounting a disk to be taken in and out of a drive body having a built-in disk drive / playback mechanism such as an optical pickup and a disk motor.
[0003]
In this type of disk drive, after the tray is loaded into the drive body, the mechanical unit supporting the disk drive / playback mechanism rises, and the turntable lifts the disk from the tray and clamps it with the clamper. Then, the disk can be reproduced. When the eject button is pressed after the end of the reproduction of the disc, the mechanical unit is lowered to release the disc clamp, the disc is returned to the tray, and then the tray is ejected from the drive body.
[0004]
As a mechanism for raising and lowering the mechanical unit, for example, as shown in FIG. 5, there is a type in which the mechanical unit 5 is rotated about a rotation shaft 6 provided at an end on the back side in the tray insertion direction as a fulcrum. That is, the guide projection 8 is provided on the front side of the mechanical unit 5, and the guide projection 8 is inserted and held in the elevating guide groove 9 a of the cylindrical cam 27. The mechanical unit 5 is moved up and down by guiding the user. A support projection (not shown) for supporting the movable end on the front side of the mechanical unit 5 raised to the disk clamp position from below on the cylindrical cam 27 and fixing the height of the mechanical unit 5 during disk reproduction. Is provided.
[0005]
[Problems to be solved by the invention]
However, in the conventional mechanical unit elevating mechanism, the front movable end of the mechanical unit at the time of disk clamping is only supported by the support projection provided on the cylindrical cam. For this reason, there is a problem in the support stability of the mechanical unit, and there is a problem that the mechanical reproduction is likely to fluctuate from side to side due to vibration from the outside, so that the reproduction of the disk is likely to be affected. Therefore, a method is considered in which the number of support points on the front side of the mechanical unit is increased by one, and the front end of the mechanical unit is supported at two points in the disk clamp state. However, for that purpose, it is necessary to newly add a supporting member having a rotating mechanism, which causes an increase in the number of parts and the number of assembling steps.
[0006]
The present invention has been made in order to solve such a problem, and it is possible to more stably support a reproducing mechanism moved to a disk reproducing position without newly adding a support member having a rotating mechanism. It is intended to provide equipment.
[0007]
In order to achieve the above object, a disk reproducing apparatus according to the present invention comprises a reproducing mechanism for driving and reproducing a disk, and a position for executing the disk reproducing and a position for not executing the disk reproducing. a rotation operating member and the drive means for operating the drive means for moving, said drive means to move the playback mechanism to the non-execution position from the reproduction execution position by force from the outside with the A first support portion provided for supporting the playback mechanism when the playback mechanism is at the playback execution position; and a first support portion provided on the rotary operation member, wherein the playback mechanism is provided when the playback mechanism is at the playback execution position. And a second supporting portion for supporting .
In the present invention, the second support for supporting the reproducing mechanism on a rotary operating member for operating the driving means with an external force so as to move the reproducing mechanism from the reproduction execution position to the non-execution position. parts by the provided, it becomes possible to support the playback mechanism in the first support portion of the reproducing mechanism provided on the motion means driving this second support part, newly a support member having a rotation mechanism It is possible to more stably support the reproducing mechanism moved to the disk reproducing position without adding. For this reason, the fluctuation of the reproducing mechanism due to the vibration from the outside is greatly reduced, and good disk reproduction is possible.
[0009]
Further, the present invention is useful in a disc reproducing apparatus having a driving means for moving a reproducing mechanism in a thickness direction of a disc between a position where the disc is reproduced and a position where the disc is not reproduced, and the reproducing mechanism which is moved to the disc reproducing position. The mechanism can be more stably supported from below.
Further, the present invention provides a rotary operating member for operating a driving means with an external force so as to move a storage body storing a disk and a reproducing mechanism from a reproduction execution position to a non-execution position. by providing the second support portion for supporting, it is possible to support the playback mechanism in the first support portion of the by the playback mechanism to the second support portion and the drive means, support having a rotating mechanism The reproducing mechanism moved to the disk reproducing position can be supported more stably without newly adding a member.
Further, the present invention is suitably used for a disk reproducing apparatus having a driving means for rotating a reproducing mechanism between a position where a disk reproduction is executed and a non-execution position by using the driving mechanism as a fulcrum. It is possible, by providing the second support portion for supporting the other end portion of the playback mechanism to the rotation operating member for operating the drive means with a force from the outside, and the second support portion capable of supporting the movable end portion of the playback mechanism in the first support portion of the reproducing mechanism provided on the drive motion means and will, without adding a new support member having a rotating mechanism, moved to the disk reproducing position The reproduced mechanism can be more stably supported.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
As shown in FIGS. 1 and 2, the disc reproducing apparatus according to the present embodiment is configured such that a tray 1 on which a disc is mounted can be freely inserted into and removed from a main chassis 2 as a drive main body. Guide protrusions 1a are provided on both side surfaces of the tray 1. These guide protrusions 1a are slidably held by guide portions (not shown) provided on the main chassis 2. Thus, the tray 1 is guided in a linear direction parallel to the surface of the disk mounted thereon, and is conveyed between the tray discharge position shown in FIG. 1 and the tray storage position shown in FIG.
[0014]
As shown in FIGS. 1 to 4, a reproduction mechanical unit configured to support a mechanical chassis 3 having a disk drive / reproduction mechanism mounted thereon through a plurality of buffer members 4 such as damper rubber, as shown in FIGS. 5 are provided. On the mechanical chassis 3, a disk motor 13, an optical pickup 14, an optical pickup feed mechanism (including the pickup feed motor 10 and the like) are mounted. A turntable 16 is attached to a motor shaft of the disk motor 13. The main chassis 2 holds a clamper 12 via a clamper holder 11.
[0015]
As shown in FIG. 5, rotating shafts 6 are coaxially protruded from both sides of the reproducing mechanism unit 5 on the far side in the tray insertion direction, and these rotating shafts 6 are provided on the main chassis 2. It is rotatably held by the holding section 7. A rotation guide shaft 8 projects from the front of the reproducing mechanism unit 5. The rotation guide shaft 8 is inserted and held in an elevating guide groove 9 a provided on a side surface of the cylindrical cam 27. With the rotation of 27, it is guided vertically (in the thickness direction of the disk) along the elevating guide groove 9a. Thus, the reproduction mechanism unit 5 is configured to tilt about the rotation shaft 6 as a fulcrum.
[0016]
As shown in FIGS. 3 and 4, a loading motor (not shown) is mounted on the main chassis 2, and an intermediate gear 22 is meshed with a drive shaft of the motor via a pinion gear 21. Further, a loading gear 24 is connected to a pinion gear 23 of the intermediate gear 22. 6, a rack gear 42 provided on the tray 1 is provided on the pinion gear 25 above the loading gear 24, and a cylindrical cam 27 is provided on the pinion gear 26 below the loading gear 24, as shown in FIG. The gears are meshed with each other.
[0017]
The cylindrical cam 27 is provided with a pin projection 28 that engages with a cam 41 protruding from the back surface of the tray 1. Further, the cylindrical cam 27 has a support protrusion 29 for supporting the reproducing mechanism unit 5 moved up to the disk clamp position, and a cam groove for holding and guiding a pin protrusion 32 erected at one end of the emergency lever 31. 33 are provided.
[0018]
The emergency lever 31 is rotatably provided with a shaft 34 as a fulcrum, and has a horizontal projection 35 together with the above-mentioned pin projection 32 as coupling means with the cylindrical cam 27. The coupling structure between the pin projection 32 and the horizontal projection 35 and the cylindrical cam 27 will be described later.
[0019]
Further, the emergency lever 31 has a support projection 37 for supporting the movable end on the front side of the reproducing mechanism unit 5 in cooperation with the support projection 29 of the cylindrical cam at the time of disc clamping, and a two-contact type when the disc clamp is completed. A switch operating section 39 is provided for pressing the swing switch 38 in a predetermined direction to depress the switch 38 from the neutral state.
[0020]
The switch 38 detects the disc clamp completion time and the tray discharge completion time while discriminating each of them according to the falling direction. That is, as shown in FIG. 13, when the disc clamp is completed, the switch 38 is pushed by the switch operating portion 39 of the emergency lever 31 and the switch 38 is tilted to the right in the drawing. The switch 38 is pushed down by the provided switch operation projection 49, and conversely, falls down to the left side in the figure.
[0021]
Next, the operation of the disc reproducing apparatus when the tray is ejected will be described. FIG. 3 and FIG. 6 show a state at the time of disk reproduction, that is, at the time of disk clamping. At this time, the switch 38 is pressed to the right by the switch operating section 39 of the emergency lever 31. The movable end on the front side of the reproducing mechanism unit 5 is supported at two points by the support protrusions 29 and 37 of the cylindrical cam 27 and the emergency lever 31, whereby the reproducing mechanism unit is vibrated by external vibration. 5 Prevents wobble. Further, at this time, the gear of the cylindrical cam 27 and the lower pinion gear 26 of the loading gear 24 are connected (engaged), and the upper pinion gear 26 and the rack gear 42 of the tray 1 are not connected. At this time, as shown in FIG. 13, the tray positioning projections 44 provided on the emergency lever 31 are engaged with the ribs 45 provided on the back surface of the tray 1, so that the positioning of the tray 1 on a plane can be performed. Is being done.
Thereafter, the loading motor is turned on and the loading gear 24 starts rotating in the direction of the arrow, whereby the cylindrical cam 27 rotates in the direction of the arrow. By the rotation of the cylindrical cam 27, the emergency lever 31 connected to the cylindrical cam 27 via the cam groove 33 and the pin projection 32 rotates in the direction of the arrow. As a result, the switch operating portion 39 of the emergency lever 31 is separated from the switch 38, and the support protrusion 37 of the emergency lever 31 is moved together with the support protrusion 29 of the cylindrical cam 27 into the movable ends 5a, 5b on the front side of the reproducing mechanism unit 5. Evacuate from the supporting position. Further, the rotation guide shaft 8 of the reproducing mechanism unit 5 is guided downward according to the elevation guide groove 9a of the cylindrical cam 27, and the disk clamp state is released. FIG. 7 shows a state at this time (the cylindrical cam 27 rotates 60 degrees).
[0023]
When the cylindrical cam 27 is further rotated, as shown in FIG. 8, the tray 1 moves in the discharge direction by the action of the pin projection 28 protruding from the upper surface of the cylindrical cam 27 and the cam 41 provided on the back surface of the tray 1. Then, when the cylindrical cam 27 rotates by 85 degrees, the upper pinion gear 25 of the loading gear 24 and the rack gear 42 of the tray 1 are brought into a connected state as shown in FIG. At this point, the gear 27a of the cylindrical cam 27 and the lower pinion gear 26 of the loading gear 24 are still in a connected state.
[0024]
FIG. 10 shows a state in which the cylindrical cam 27 is further rotated to 95 degrees. At this time, the gear 27a of the cylindrical cam 27 and the lower pinion gear 26 of the loading gear 24 are cut off, and the rotation of the cylindrical cam 27 is restricted by the action of the pin projection 28 of the cylindrical cam 27 and the cam 41 of the tray 1. You. On the other hand, the tray 1 moves forward by the driving of the loading gear 24.
[0025]
Thereafter, the pin projection 28 of the cylindrical cam 27 is separated from the cam 41 of the tray 1 as shown in FIG. Also, as shown in FIG. 13, one end (rotation restricting portion) 46 of the emergency lever 31 is almost simultaneously with the detachment of the pin projection 28 from the cam 41 by the wall of the loading slide groove provided on the tray 1. The emergency lever 31 is restricted from rotating (locked) by contact with the wall 47.
[0026]
FIG. 12 shows a state at the time when the discharge of the tray 1 is completed. As described above, even when the discharge of the tray 1 is completed, the one end 46 of the emergency lever 31 is in contact with the wall 47 of the slide groove of the tray 1, and the emergency lever 31 and the cylindrical cam 27 are vibrated from the outside. To prevent trouble by rotating unjustly. When the discharge of the tray 1 is completed, a switch operation projection 49 provided on the back surface of the tray 1 pushes the switch 38 to the left as shown in FIG. Then, a detection signal indicating that the tray has been ejected is output from the switch 38 to the controller, and the controller receiving this detection signal stops driving the loading motor.
[0027]
Further, in this disk reproducing apparatus, when the tray loading mechanism and the mechanical unit elevating mechanism become inoperable due to a failure, a power failure, etc., as shown in FIG. 53 is inserted, and the emergency lever 31 is forcibly turned in the direction of the arrow. As a result, the cylindrical cam 27 rotates in the direction of the arrow, and the reproducing mechanism unit 5 descends, so that the tray 1 is slightly discharged and becomes ready to be manually pulled out.
[0028]
Here, the details of the coupling portion between the emergency lever and the cylindrical cam will be described with reference to FIG.
FIG. 14A shows a state at the time of disk reproduction (disk clamping). At this time, the pin projection 32 of the emergency lever 31 is at a fixed position in the cam groove 33 of the cylindrical cam 27 near the outer periphery of the cylindrical cam. When timer Jen turning the sea lever 31 manually with a stick-shaped material as described above, while moving the pin projection 32 toward the center of the cylindrical cam 27 along the cam groove 33, the wall of the cam groove 33 in its peripheral surface Is pressed, the cylindrical cam 27 rotates in the direction of the arrow.
[0030]
Then, as shown in FIG. 14 (b), where the cylindrical cam 27 is rotated to a certain angle, with distance from the wall of the cam groove 33 by the extension of the pin projection 32 cam groove 33, the horizontal emergency lever 31 instead The protrusion 35 comes into contact with the protrusion receiving surface 27a of the cylindrical cam 27, and rotates while pressing the cylindrical cam 27 outward from the center. Thereafter, as shown in FIG. 14C, the horizontal projection 35 presses the projection receiving surface 27a while moving toward the outer peripheral side of the cylindrical cam 27 along the projection receiving surface 27a.
As described above, when the pin projection 32 approaches the center of the cylindrical cam 27 and the moment acting on the cylindrical cam 27 is reduced, the horizontal projection 35 is brought into contact with the projection receiving surface 27a of the cylindrical cam 27, and Since the cam 27 is configured to be pushed outward from its center, the total force is smaller than in the case where the pin protrusion 32 alone pushes the wall of the cam groove 33 of the cylindrical cam 27 to rotate the cylindrical cam 27. Can rotate the cylindrical cam 27.
[0032] go to further rotate the emergency lever 31, timer Gen horizontal projection 35 of the sea lever 31 away from the protrusion receiving surface 27a of the cylindrical cam 27, the pin projections 32 against the walls of the pin protrusions 32 cam groove 33 again As a result, the cylindrical cam 27 is turned. At this time, since the pin projection 32 pushes the wall of the cam groove 33 outward, the cylindrical cam 27 can be rotated with a small force. At this time, since the pin projection 32 pushes the wall of the cam groove 33 outward, the cylindrical cam 27 can be rotated with a small force. Thus, according to the present embodiment, the support lever for supporting the movable end on the front side of the reproduction mechanism unit 5 at two points in cooperation with the support protrusion 29 of the cylindrical cam 27 at the time of disc reproduction is provided on the emergency lever 31. Since the 37 is provided, a stable support structure of the reproducing mechanism unit 5 can be realized without newly adding a supporting member having a rotation mechanism, and the influence of external vibration on the disk reproduction is greatly reduced. It becomes possible.
[0033]
【The invention's effect】
As described above, according to the disk reproducing apparatus of the present invention, the reproducing mechanism moved to the disk reproducing position can be supported more stably without newly adding a support member having a rotating mechanism. For this reason, the fluctuation of the reproducing mechanism due to the vibration from the outside is greatly reduced, and good disk reproduction is possible.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a tray ejection state of the disk reproducing apparatus of the present embodiment; FIG. 2 is a perspective view showing a disk clamping state of the disk reproducing apparatus; FIG. 3 shows a configuration of a tray loading mechanism in a disk clamping state; FIG. 4 is a perspective view showing the configuration of a tray loading mechanism in a non-disc clamp state. FIG. 5 is a side sectional view showing an elevating mechanism of a reproducing mechanism unit. FIG. FIG. 7 is a plan view showing a state in which the cylindrical cam is rotated by 60 degrees. FIG. 8 is a plan view showing a state in which the cylindrical cam is also rotated by 75 degrees. FIG. FIG. 10 is a plan view showing a state where the cylindrical cam is rotated by 95 degrees. FIG. 11 is a plan view showing a state where the rotation of the emergency lever is restricted. FIG. 13 is a plan view showing the state at the end of tray ejection. FIG. 13 is a view showing the relationship between the switch and the switch operation projections of the emergency lever and the tray. FIG. 14 is a detailed view of a coupling portion between the emergency lever and the cylindrical cam. [Description of References]
1 Tray 2 Main chassis 3 Mechanical chassis 5 Reproduction mechanical unit 13 Disk motor 14 Optical pickup 24 Loading gear 27 Cylindrical cam 29 Support protrusion 31 Emergency Lever 32 Pin projection 33 Cam groove 35 Horizontal projection 37 Support projection 38 Switch 39 Switch operating part 42 Rack gear of tray

Claims (4)

A playback mechanism for driving and playing the disc;
Driving means for moving the reproducing mechanism between a position at which disk reproduction is performed and a position at which disk reproduction is not performed;
A rotation operation member for operating the driving unit with an external force so as to move the reproduction mechanism from the reproduction execution position to the non-execution position;
A first support unit provided on the driving unit and supporting the playback mechanism when the playback mechanism is at the playback execution position;
A second support portion provided on the rotary operation member, the second support portion supporting the playback mechanism when the playback mechanism is at the playback execution position. A playback mechanism for driving and playing the disc;
Driving means for moving the reproducing mechanism in a thickness direction of the disk between a position at which the disk is played and a position at which the disk is not played;
A rotation operation member for operating the driving unit with an external force so as to move the reproduction mechanism from the reproduction execution position to the non-execution position;
A first support unit provided on the driving unit and supporting the playback mechanism when the playback mechanism is at the playback execution position;
A second support portion provided on the rotary operation member, the second support portion supporting the playback mechanism when the playback mechanism is at the playback execution position. A container housing the disk,
A reproducing mechanism that drives and reproduces a disk housed in the housing,
Driving means for moving the container and the playback mechanism between a position at which the disk contained in the container is played and a position at which the disk is not played,
A rotation operation member for operating the driving unit with an external force so as to move the container and the reproduction mechanism from the reproduction execution position to the non-execution position,
A first support unit provided on the driving unit and supporting the playback mechanism when the playback mechanism is at the playback execution position;
A second support portion provided on the rotary operation member, the second support portion supporting the playback mechanism when the playback mechanism is at the playback execution position. A playback mechanism for driving and playing the disc;
Driving means for rotating the reproducing mechanism between a position where disc reproduction is executed and a non-execution position with one end thereof as a fulcrum;
A rotation operation member for operating the driving unit with an external force so as to move the reproduction mechanism from the reproduction execution position to the non-execution position;
A first support unit provided on the driving unit, for supporting the other end of the playback mechanism when the playback mechanism is at the playback execution position;
A second support portion provided on the rotary operation member, for supporting the other end of the playback mechanism when the playback mechanism is at the playback execution position.

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