JPH10112118A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a point of time of completing disk clamping and a point of time of completing tray ejection by one switch and to reduce the number of parts and the number of assembling. SOLUTION: An emergency lever 31 is provided with a switch operating part 39 for pressing a switch 38 at the time of completing the disk clamping. Then, an operating projection 49 for operating the switch 38 is provided on a back surface of the tray 1. As a result, the degree of freedom of selecting positions of the switch 38 is drastically enhanced, and without newly adding a switch operating member having a rotary mechanism to this switch 38, the detection of a point of time of completing the disk clamping and a point of time of completirng the tray ejection can be performed by using one two-contact type oscillating switch 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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.

[0002]

2. Description of the Related Art At present, a disk drive such as a CD-ROM drive is mainly of a horizontal front loading type. 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.

[0007]

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.

[0009]

In order to achieve the above object, a disc reproducing apparatus according to the present invention comprises a reproducing mechanism for driving and reproducing a disk, and a reproducing mechanism for executing a position for executing the reproduction of the disk and a non-executing position. A rotation operating member for operating the driving means with an external force to move the reproducing mechanism from the reproduction execution position to the non-execution position, and a driving mechanism for moving the reproduction mechanism to the reproduction execution position. It is characterized by comprising detection means for detecting the arrival, and an operation unit provided on the rotary operation member and operating the detection means when the reproduction mechanism reaches the reproduction execution position.

More specifically, the detecting means is a switch for detecting the arrival of the reproducing mechanism at the reproduction execution position with a change in mechanical state, and more specifically, the switch to the reproduction execution position of the reproduction mechanism. , And a single swing switch of, for example, a two-contact type that detects arrival of the disk and arrival of a container that accommodates the disk at a predetermined non-execution position.

When the container reaches a predetermined non-execution position, the detecting means is engaged with a first operating portion provided on the container and changes to the first state, and the control means controls the control means. A signal is output to stop the operation of the driving means. Further, when the reproducing mechanism reaches the reproducing execution position, the reproducing mechanism is engaged with the second operating portion provided on the rotary operating member to change to the second state, and outputs a control signal to the controlling means to output the control signal to the controlling means. Stop the operation.

The rotary operation member is, specifically, an emergency lever for operating the driving means with an external force so as to move the container and the reproduction mechanism from the reproduction execution position to the non-execution position. is there.

As described above, according to the present invention, the 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 is provided with:
Since the operating unit for operating the detecting means when the reproducing mechanism reaches the reproducing execution position is provided, the degree of freedom in selecting the position of the detecting means is improved, and as a result, this is the time when the reproducing mechanism reaches the reproducing executing position. The detection of the completion of the disc clamping and the completion of the tray ejection when the container reaches the predetermined non-execution position can be performed by a single two-contact type swing switch (detection means).

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, since the rotating operation member is provided with the operating section for operating the detecting means, the degree of freedom in selecting the position of the detecting means is greatly improved, and the time when the disk clamp is completed and when the tray is discharged The completion point can be detected by a single two-contact type swing switch.

[0016]

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) 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 protrusions 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 guide groove 33 and the pin projection 32 rotates in the direction of the arrow. As a result, the switch operating section 39 of the emergency lever 31 is separated from the switch 38, and the support projection 37 of the emergency lever 31 is moved together with the support projection 29 of the cylindrical cam 27 to the front movable ends 5a and 5b 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 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, the pin projection 28 of the emergency lever 31 is at a fixed position near the outer periphery of the cylindrical cam in the guide groove 33 of the cylindrical cam 27. When the emergency lever 31 is manually turned using a rod as described above, the pin projection 28 moves toward the center of the cylindrical cam 27 along the guide groove 33, and the wall of the guide groove 33 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 28
Is separated from the wall of the guide groove 33 by the extended portion of the guide groove 33, and the emergency lever 31
The horizontal projection 35 contacts the projection receiving surface 27a of the cylindrical cam 27, and rotates while rotating the cylindrical cam 27 outward from its 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, the pin projection 28 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 protrusion 2
As compared with the case where the wall of the guide groove 33 of the cylindrical cam 27 is pushed with only 8 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 28 again comes into contact with the wall of the guide groove 33 and the pin projection 2 is moved.
At 8, the cylinder cam 27 is turned. At this time, since the pin projection 28 pushes the wall of the guide 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]

As described above, according to the disk reproducing apparatus of the present invention, since the rotating operation member is provided with the operating section for operating the detecting means, the degree of freedom in selecting the position of the detecting means is greatly improved. However, the completion of the disc clamping and the completion of the tray ejection can be detected by a single two-contact type swing switch. As a result, the number of parts and the number of assembly steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tray ejection state of a disc reproducing apparatus according to an embodiment.

FIG. 2 is a perspective view showing a disk clamp state of the disk reproducing apparatus.

FIG. 3 is a perspective view showing a configuration of a tray loading mechanism 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 the reproducing mechanism unit.

FIG. 6 is a plan view showing a state of the disk reproducing apparatus according to the embodiment when the disk 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. 9 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 95 degrees.

FIG. 11 is a plan view showing a state where the rotation of the emergency lever is restricted.

FIG. 12 is a plan view showing a state at the end of tray ejection.

FIG. 13 is a diagram showing the relationship between the switch operation projections of the emergency lever and the tray and the switches.

FIG. 14 is a diagram for explaining details of a coupling portion between the emergency lever and the cylindrical cam;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tray 2 ... Main chassis 3 ... Mechanical chassis 5 ... Reproducing mechanical unit 13 ... Disc 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 Switch 39 Switch operation part 42 Rack gear of tray 49 Switch operation protrusion of tray

Claims (8)

[Claims] 1. A reproducing mechanism for driving and reproducing a disk, driving means for moving the reproducing mechanism between a position at which reproduction of the disk is executed and a non-executing position; A rotation operating member for operating the driving means with an external force so as to move the driving mechanism to the non-execution position, a detection means for detecting that the reproduction mechanism has reached the reproduction execution position, and the rotation operation member. And an operation unit for operating the detection means when the reproduction mechanism reaches the reproduction execution position. 2. A reproducing mechanism for driving and reproducing a disk, driving means for moving the reproducing mechanism between a position at which the disk is reproduced and a position at which the disk is not reproduced, and a device for moving the reproducing mechanism to the reproducing position And a rotation operating member for operating the driving means with an external force so as to move the drive mechanism from the outside to the non-execution position, and detecting that the playback mechanism reaches the playback execution position with a mechanical state change. Detecting means, provided on the rotary operation member, and an operating unit that engages with the detecting means and changes the state of the detecting means when the reproduction mechanism reaches the reproduction execution position. Disk playback device. 3. A housing accommodating a disk, a playback mechanism for driving and playing back the disk housed in the housing, and a housing for the housing and the playback mechanism, respectively. Driving means for moving between a position at which reproduction is performed and a non-execution position; and an externally driving means for moving the container and the reproduction mechanism from the reproduction execution position to the non-execution position. A rotation operation member for operating by force, a detection unit for detecting arrival of the reproduction mechanism at the reproduction execution position and arrival of the container at the predetermined non-execution position, respectively, provided on the rotation operation member. An operating unit for operating the detecting means when the playback mechanism reaches the playback execution position. 4. A housing for accommodating a disk, a playback mechanism for driving and playing back the disk housed in the housing, and a housing for storing the disk and the playback mechanism, respectively. Driving means for moving between a position at which reproduction is performed and a non-execution position; and an externally driving means for moving the container and the reproduction mechanism from the reproduction execution position to the non-execution position. A rotation operation member for operating by force, and a detection of detecting the arrival of the playback mechanism at the playback execution position and the arrival of the container at the predetermined non-execution position, respectively, with a mechanical state change. And an operation unit provided on the rotary operation member, the operation unit engaging with the detection unit and changing the state of the detection unit when the reproduction mechanism reaches the reproduction execution position. Disk reproducing apparatus. 5. An accommodating body for accommodating a disk, a reproducing mechanism for driving and reproducing the disk accommodated in the accommodating body, and a housing for accommodating the accommodating body and the reproducing mechanism, respectively. Driving means for moving between a position at which reproduction is performed and a non-execution position; and an externally driving means for moving the container and the reproduction mechanism from the reproduction execution position to the non-execution position. A rotation operation member for operating by force, detection means for detecting arrival of the reproduction mechanism at the reproduction execution position and arrival of the container at the predetermined non-execution position, respectively, provided on the container. A first operation unit that operates the detection unit when the container reaches the predetermined non-execution position; and a first operation unit that is provided on the rotation operation member, and is provided before the reproduction mechanism reaches the reproduction execution position. And a second operating section for operating said detecting means. 6. A housing accommodating a disk, a playback mechanism for driving and playing back the disk housed in the housing, and a housing for storing the disk and the playback mechanism, respectively. Driving means for moving between a position at which reproduction is performed and a non-execution position; and an externally driving means for moving the container and the reproduction mechanism from the reproduction execution position to the non-execution position. A rotation operation member for operating by force, and a detection of detecting the arrival of the playback mechanism at the playback execution position and the arrival of the container at the predetermined non-execution position, respectively, with a mechanical state change. A first operation unit provided in the container, the first operation unit engaging with the detection unit and changing the detection unit to the first state when the container reaches the predetermined non-execution position; The rotation operation unit And a second operation unit that is provided on the material and engages with the detection unit when the reproduction mechanism reaches the reproduction execution position to change a state of the detection unit to a second state. Disc playback device. 7. A reproducing mechanism for driving and reproducing a disk, driving means for moving the reproducing mechanism between a position at which the disk is reproduced and a position at which the disk is not reproduced, and moving the reproducing mechanism to the reproduction execution position A rotation operation member for operating the mechanism moving means with an external force so as to move the mechanism to the non-execution position, a detection means for detecting that the reproduction mechanism has reached the reproduction execution position, and a driving means Control means for controlling the operation of the driving means to stop when the detection means detects that the reproduction mechanism has reached the reproduction execution position during the movement of the reproduction mechanism, and An operating unit provided for operating the detecting means when the playback mechanism reaches the playback execution position. 8. A housing for accommodating a disk, a reproducing mechanism for driving and reproducing the disk accommodated in the container, and a housing and a reproducing mechanism for each of the disks accommodated in the housing. Driving means for moving between a position at which reproduction is performed and a non-execution position; and an externally driving means for moving the container and the reproduction mechanism from the reproduction execution position to the non-execution position. A rotation operation member for operating by force, a detection unit for detecting the arrival of the reproduction mechanism at the reproduction execution position and an arrival of the container at the predetermined non-execution position, respectively, and the reproduction by the driving unit. When the detection unit detects that the reproduction mechanism has reached the reproduction execution position while the mechanism is moving, the operation of the driving unit is stopped, and the movement of the container by the driving unit is stopped. Control means for controlling the operation of the driving means to stop when the arrival of the container at the predetermined non-execution position is detected by the detection means; and A first operation unit that operates the detection unit when the predetermined non-execution position is reached, and a first operation unit that is provided on the rotation operation member and operates the detection unit when the reproduction mechanism reaches the reproduction execution position. 2. A disc reproducing apparatus comprising: an operation unit according to claim 2;