JP3428315B2 - Disc playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus for reproducing an optical disk such as a CD-ROM disk. 2. Description of the Related 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 type 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. 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 the disk with the clamper. By doing so, it becomes possible to play the disc. When the eject button is pressed after the end of the reproduction of the disk, the mechanical unit is lowered to release the disk clamp, the disk is returned to the tray, and then the tray is ejected from the drive body. As a mechanism for raising and lowering the mechanical unit, for example, as shown in FIG. 5, there is a mechanism for rotating the mechanical unit 5 with a rotating shaft 6 provided at an end on the back side in the tray insertion direction as a fulcrum. . That is, this is the mechanical unit 5
A guide projection 8 is provided on the front side of the
Is inserted and held in the vertical guide groove 9a of the cylindrical cam 27, and the mechanical unit 5 is raised and lowered by guiding the guide protrusion 8 in the vertical direction by the rotation of the cylindrical cam 27. In the above-mentioned conventional disk drive, the completion of the disk clamp is detected, for example, from the rotational position of the cylindrical cam. That is, a projection for switch operation is provided on the cylindrical cam, and the projection operates the switch when the disk clamp is completed. When the switch is operated, a disc clamp completion detection signal is output from the switch to the controller, and the controller performs control to stop the operation of the motor that rotates the cylindrical cam. In such a disk drive,
The completion of the tray unloading is detected, for example, by directly detecting the position of the tray with a switch. That is, a projection for switch operation is provided on the tray, and the projection operates the switch when the tray is discharged to a predetermined position. When the switch is operated, a tray ejection completion detection signal is output from the switch to the controller, and the controller performs control so as to stop the operation of the loading motor. As described above, in the disk drive, at least two switches for detecting the completion of the disk clamping and the completion of the ejection of the tray are required. Against this background,
In recent years, there has been an increasing demand for performing the above two detections with a single switch in terms of downsizing the disk drive, reducing the number of assembly steps, and the like. The present invention has been made to meet such a demand, and it is possible to detect the completion of disc clamping and the completion of tray ejection with a single switch, thereby reducing the number of parts and the number of assembly steps. It is an object of the present invention to provide a disk reproducing apparatus capable of achieving the above. In order to achieve the above object, a disk reproducing apparatus according to the present invention mounts a disk.
A tray, a reproduction mechanism for driving the disc and reproducing mounted on the tray, and a drive mechanism for moving the tray and the playback mechanism between a position and a non-execution position for executing playback of said disk, said The playback mechanism is
In the first direction when in the line position,
The first direction when the recording / reproducing mechanism is at the non-execution position;
In the state where it is pushed in the second direction different from
A switch for detecting the state of the
When the operation is disabled, the reproduction mechanism is moved from the reproduction execution position to the
Manually moving the drive mechanism to move to the non-execution position
A rotating operation member for operating the regenerating mechanism.
When in the playback execution position, it interferes with the switch
A switch for pressing the switch in the first direction.
A rotary operating member having a switch operating section,
When the tray reaches the non-execution position,
Push this switch in the first direction
Switch that switches from the pressed state to the pressed state in the second direction.
And a touch operation projection . [0010] More specifically, the switch is one of the swing switch 2 contact type if e example. [0011] [0012] [0013] The present onset Akira in this way, non-operation of the drive mechanism
The playback mechanism from the playback execution position to the non-execution position
Operation unit to operate the drive mechanism manually
When the regeneration mechanism is in the regeneration execution position, the switch and
Interference causes the switch to be pushed in the first direction
A switch operation section is provided, and the tray is
When it reaches the non-execution position, it interferes with the switch and
Switch in the second direction from the state pressed in the first direction.
With a switch operation projection to make it
In particular, the rotation operation member is provided with the switch operation portion.
Thus, the degree of freedom in selecting the position of the switch is improved, and as a result,
When the disc clamp with the playback mechanism at the playback execution position is completed
Point and the point at which the tray was reached
A configuration that detects the completion of laser discharge with one switch
It is easy to take. When the operation protrusion of the switch is provided on the cylindrical cam as in the prior art, the position of the switch is limited to the vicinity of the cylindrical cam (approximately the center in the width direction of the entire apparatus). in this case,
There is no problem if the switch operation projection can be provided at the required position on the tray side, but that position of the tray may be cut off to avoid interference with the playback mechanism such as the pickup feed motor when clamping the disc. Yes, in this case, the switch operation protrusion cannot be provided on the tray. For this reason, a switch for detecting the time when the disk clamp is completed and a switch for detecting the time when the tray ejection is completed must be provided at different positions. On the other hand, according to the present invention, the switch operating section for operating the switch is provided on the rotary operation member.
The degree of freedom in selecting the position of the switch is greatly improved, and it is possible to detect the completion of the disk clamp and the completion of the ejection of the tray with a single swing switch. Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the disk reproducing apparatus according to the present embodiment is configured such that a tray 1 on which a disk is mounted can be taken in and out of a main chassis 2 as a drive main body. Guide protrusions 1a are provided on both side surfaces of the tray 1, and 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 transported between the tray discharge position shown in FIG. 1 and the tray storage position shown in FIG. As shown in FIGS. 1 to 4, a main chassis 2 is provided with a mechanical chassis 3 on which a disk drive / reproducing mechanism is mounted via a plurality of buffer members 4 such as a damper rubber. A reproduction mechanism unit 5 is 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) 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. As shown in FIG. 5, rotating shafts 6 are coaxially protruded from both sides of the reproducing mechanism unit 5 on the rear side in the tray insertion direction, and these rotating shafts 6 are attached to the main chassis. The second shaft holder 7 is rotatably held. Also,
A rotation guide shaft 8 protrudes from the front of the reproducing mechanism unit 5, and 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 the disk, it is guided vertically (in the thickness direction of the disk) along the elevating guide groove 9a. Thus, the reproducing mechanism unit 5 is configured to tilt about the rotation shaft 6 as a fulcrum. As shown in FIGS. 3 and 4, a loading motor (not shown) is mounted on the main chassis 2, and a pinion gear 2 is mounted on a drive shaft of the motor.
1 and the intermediate gear 22 is meshed with the intermediate gear 2.
A loading gear 24 is connected to the second pinion gear 23. 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. The cylindrical cam 27 is provided with a pin projection 28 which 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 an emergency lever 31.
A cam groove 33 for holding and guiding the pin projection 32 erected at one end is provided. The emergency lever 31 is rotatably mounted on a shaft 34 as a fulcrum, and has a horizontal projection 35 together with the above-mentioned pin projection 32 as means for coupling to the cylindrical cam 27. The pin projection 32, the horizontal projection 35 and the cylindrical cam 2
The structure of bonding with 7 will be described later. Further, the emergency lever 31 has a support protrusion 37 for supporting the movable end on the front side of the reproducing mechanism unit 5 in cooperation with the support protrusion 29 of the cylindrical cam at the time of disk clamping, and at the time of completion of the disk clamp. A switch operation unit 3 for pressing a two-contact type swing switch 38 in a predetermined direction to depress the switch 38 from a neutral state.
9 are provided. The switch 38 is for detecting the disc clamping completion time and the tray ejection completion time while discriminating each of them according to the falling direction. That is, FIG.
As shown in FIG. 3, when the disk clamp is completed, the switch operating section 39 of the emergency lever 31 is turned on.
When the tray is completely ejected, the switch 38 is pushed by a switch operation projection 49 provided on the back surface of the tray 1 and the switch 38 conversely falls to the left in the figure. Next, the operation of the disc reproducing apparatus when the tray is ejected will be described. FIG. 3 and FIG. 6 show the 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 support projections 29 and 37 of the cylindrical cam 27 and the emergency lever 31, respectively.
Thereby, the reproduction mechanical unit 5 caused by external vibration
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 tray 1 can be positioned on a plane. 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 emergency lever 3
The one support protrusion 37 is retracted from the position supporting the movable ends 5a and 5b on the front side of the reproducing mechanism unit 5 together with the support protrusion 29 of the cylindrical cam 27. Further, the rotation guide shaft 8 of the reproducing mechanism unit 5 is guided downward in accordance with 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). When the cylindrical cam 27 is further rotated, FIG.
As shown in the figure, when the tray 1 moves in the discharging 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, the cylindrical cam 27 rotates by 85 degrees. As shown in FIG. 9, the upper pinion gear 25 of the loading gear 24 and the rack gear 4 of the tray 1
2 is in a coupled state. 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. FIG. 10 shows a state in which the cylindrical cam 27 is further rotated to 95 degrees. At this time, the gear 2 of the cylindrical cam 27
7a is separated from the lower pinion gear 26 of the loading gear 24, 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. On the other hand, tray 1 has loading gear 2
4 is advanced by driving. Thereafter, as shown in FIG.
The pin projection 28 of the tray 7 is separated from the cam 41 of the tray 1.
Also, as shown in FIG. 13, the emergency lever 3 is almost simultaneously released from the cam 41 of the pin projection 28.
One end (rotation restricting portion) 46 of the tray 1 is in contact with a wall 47 of a loading slide groove provided in the tray 1, and the contact with the wall 47 regulates (locks) the rotation of the emergency lever 31. FIG. 12 shows the state at the time when the discharge of the tray 1 is completed. In this manner, even when the discharge of the tray 1 is completed, the one end portion 46 of the emergency lever 31 is in contact with the slide groove wall 47 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. At the time when the discharge of the tray 1 is completed, FIG.
As shown in FIG. 7, the switch operation projection 49 provided on the back surface of the tray 1 pushes the switch 38 to the left. Then, a detection signal indicating that the tray has been discharged is output from the switch 38 to the controller, and the controller that has received the detection signal stops driving the loading motor. In this disk reproducing apparatus, when the tray loading mechanism and the mechanical unit elevating mechanism fail to operate due to a failure, a power failure, or the like, a small hole 52 formed in the front panel 51 as shown in FIG. The rod 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 the tray 1 can be pulled out manually. The details of the connection between the emergency lever and the cylindrical cam will now be described with reference to FIG. FIG. 14A shows a state at the time of disk reproduction (disk clamping). At this time pin projection 32 of the emergency lever 31 is in the position of the cylindrical cam near the outer periphery in the cam <br/> groove 33 of cylindrical cam 27. 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. Then, as shown in FIG. 14 (b), when the cylindrical cam 27 rotates to a certain angle, the pin projection 32
Together away from the wall of the cam groove 33 by an extension portion of the cam groove 33, instead of abutting ledge 35 of the emergency lever 31 is in protrusion receiving surface 27a of the cylindrical cam 27, toward the outside of the cylindrical cam 27 from the center Turn while pressing. 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, the pin projection 32 is
When the moment acting on the cylindrical cam 27 is reduced by approaching the center of the cylindrical cam 27, the horizontal projection 35 is brought into contact with the projection receiving surface 27a of the cylindrical cam 27 to push the cylindrical cam 27 outward from the center. By doing, pin projection 3
As compared with a case where the wall of the cam groove 33 of the cylindrical cam 27 is pushed by only 2 to rotate the cylindrical cam 27, the cylindrical cam 27 can be rotated with a smaller total force. When the emergency lever 31 is further rotated, the horizontal projection 35 of the emergency lever 31 is separated from the projection receiving surface 27a of the cylindrical cam 27, and the pin projection 32 again comes into contact with the wall of the cam groove 33 and the pin projection 32
As a result, the cylindrical cam 27 is turned. At this time,
Since the pin protrusion 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, by providing the emergency lever 31 with the switch operating portion 39 for pressing the switch 38 when the disk clamp is completed, the degree of freedom in selecting the position of the switch 38 is greatly improved, and The disc clamp completion time and the tray ejection completion time can be performed using a single two-contact type swing switch 38 without newly adding a switch operating member having a mechanism, thereby reducing the number of parts and the number of assembly steps. Can be achieved. [0037] According to the disk reproducing apparatus of the present invention as described above, according to the present invention, since a switch operation unit for operating the switch to the rotary operating member, considerably the degree of freedom in selecting the position of the switch The detection of the completion of the disc clamping and the completion of the ejection of the tray can be performed by one two-contact type swing switch. As a result, the number of parts,
Can it to reduce the number of assembly steps.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a tray ejection state of a disk reproducing apparatus according to the present embodiment; FIG. 2 is a perspective view showing a disk clamping state of the disk reproducing apparatus; FIG. FIG. 4 is a perspective view showing a configuration in a disk clamp state. FIG. 4 is a perspective view showing a configuration of a tray loading mechanism in a non-disk clamp state. FIG. 5 is a side sectional view showing an elevating mechanism of a reproducing mechanism unit. FIG. 7 is a plan view showing a state in which the disk reproducing device is clamped. 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 rotated by 75 degrees. FIG. 10 is a plan view showing a state in which the cylindrical cam is rotated by 85 degrees. FIG. 10 is a plan view showing a state in which the cylindrical cam is rotated by 95 degrees. FIG. 11 is a rotation restriction of the emergency lever. FIG. 12 is a plan view showing a state at the time of tray discharge completion. FIG. 13 is a view showing a relationship between an emergency lever and each switch operation protrusion of the tray and a switch. FIG. 14 is an emergency lever and a cylinder. Diagram for explaining details of a coupling portion with a cam [Description of reference numerals] 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 protrusion 33 ... Cam groove 35 ... Horizontal protrusion 37 ... Support protrusion 38 ... Switch 39 ... Switch operation part 42 ...... Tray rack gear 49 ...... Tray switch operation protrusion

Claims (1)

(57) Claims 1. A tray on which a disk is mounted, a reproducing mechanism for driving and reproducing the disk mounted on the tray, and the tray and the reproducing mechanism for reproducing the disk. A drive mechanism for moving between an execution position and a non-execution position, and a first direction when the reproduction mechanism is at the reproduction execution position.
And the playback mechanism is in the non-execution position.
Is pushed in a second direction different from the first direction.
State to detect each state.
Switch and the playback mechanism when the drive mechanism is inoperable.
The drive to move from the row position to the non-execution position
A rotation operation member for manually operating the mechanism,
When the playback mechanism is at the playback execution position, the switch
Switch in the first direction due to interference with the switch
A rotation operation member having a switch operation section for setting a state, and the rotation operation member is provided on the tray, and the tray is in the non-execution position
When it arrives, it interferes with the switch
From the state pressed in the first direction to the state pressed in the second direction.
And a switch operation projection for bringing the disc player into a closed state .