JPS6396766A - Optical disk reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the exchange of a disk to prevent the signal reading surface of the disk from being loaded adversely, and to prevent a stain or a flaw from being attached on the disk, by enabling the disk to be loaded on a reproducing equipment main body, holding the disk in a disk case on the market. CONSTITUTION:When the disk case 6 is pushed against a restoring lever 36, an engaging lever 24 is engaged and held with the engaging recessed part 27 of the disk case 6, and a detecting lever 15 is pressed to the outside plane of the disk 9, then being turned, and a detecting switch 18 is switched from an ON-state to an OFF-state, and an operation circuit 53 supplies an operation command to a driving motor 44. At the time of receiving the operation command from the operation circuit 53, a movable cam 42 is moved in a direction of B, and a reproducing mechanism substrate 39 is raised, and a driving gear 43 interlocked with the substrate is also raised to the position of the disk desired to be reproduced. Next, a turning plate 46 is turned in a direction of C, and a tip part 51 turns a positioning gear 47, and releases it from a positioning recessed part 50, and simultaneously, the driving gear 43 is engaged with a rack 52. In this way, the exchange of the disk can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical disc reproducing apparatus that optically reads information by projecting a light spot onto an information track on which high-density signals are recorded on a disc.

Conventional technology In recent years, commercialization of optical disc playback devices has progressed from devices that play a single disk to devices that can store multiple disks and play any one of them at will. .

An example of the above-mentioned conventional multi-disc playback device will be described below with reference to the drawings.

FIG. 7 shows a conventional disc playback device of this type. In Fig. 7, 1 is the main body of the disc playback device, 2
3 is a disc holding case, 4 is a disc case, and 5 is a disc playback mechanism.

First, let's start with disc case 4 to disc 3, which are commercially available.
Then, the disc 3 is mounted in the disc holding case 2 with the signal reading surface of the disc 3 aligned in the specified direction. In this way, the disc holding case 2 with the plurality of discs 3 mounted therein is mounted on the playback device main body 1, and becomes ready for playback.

Next, the playback mechanism 5 moves to the specified position on the disk 3 according to the performance program order, takes it into the playback mechanism 6, and enters the playing state.

Problems to be Solved by the Invention However, the above configuration has the following problems.

(1) It is necessary to replace the disc from a commercially available disc case to a dedicated disc holding case, and during this replacement work, the signal readout surface of the disc may be reversed, or there may be dirt or scratches on the signal readout surface due to human fingers. There is a risk of adhesion.

(2) While a disc is being played, it is not possible to replace other discs in the disc holding case, so interruptive play cannot be performed.

(3) When a disc is not installed in the position where the playback order has been programmed, the playback mechanism takes in the disc and performs an idle operation because there is no disc presence detection device, so it takes a long time until the next disc is played. This had problems such as long waiting times.

An object of the present invention is to provide the following optical disc playback device that can solve the above problems.

(1) By making it possible to insert the disc into the main body of the playback device while keeping it in the commercially available disc case, there is no need to replace the disc.11 It also prevents the disc from being installed in the wrong direction with the signal readout side of the disc, and prevents dirt on the disc. Prevents adhesion and scratches.

(2) By making it possible to replace any one of the plurality of discs with another disc while playing, it is possible to interrupt playback of a disc other than the installed disc.

(3) By being equipped with a disc presence/absence detection device, the playback mechanism does not take in a disc at a position where a disc is not installed and passes through to the next disc position, reducing the waiting time before playback. can be made shorter.

Means for Solving the Problems In order to achieve the above object, the optical disc playback device of the present invention, when a commercially available disc case holding a disc is attached to the main body of the playback device, reproduces the commercially available disc case from the mounting position. When the disc position is pressed, a detection lever rotatably held on a part of the case holder to be transported to the position switches the interlocking detection switch from ON to OFF, and the operating circuit of the playback mechanism recognizes the presence of the disc. ,
Transmits operation commands to the drive motor. Next, when the drive motor moves the case receiver from the installation position to the playback position, the cam surface formed by the case support side and the detection lever turns the detection switch from OFF (installation position) to ON (during the movement) and then OFF (playback). position), the operating circuit recognizes that the case holder has completed its movement, and
Enter playback state.

At this time, the detection lever engages with a part of a guide member provided for moving the case holder, moves away from the side of the disc, and allows the disc to rotate freely, thereby enabling playback. The disc is also equipped with a structure at multiple locations that allows the disc to be attached to and removed from the main body of the playback device while the disc is held in a commercially available disc case.

Function: With the above-described configuration, the present invention allows a purchased disc to be attached to and removed from the main body of a playback device without removing it from the disc case and without touching the disc, and it is possible to replace the disc case with another disc case during playback. In addition, during normal use when a commercially available disc case containing a disc is attached to the playback device, the detection switch turns from ON to OFF, and the operating circuit sends an operation command to the drive motor to move the case holder to the playback position. However, if there is no disc, the detection switch remains ON and the operating circuit does not work.
Do not move to the playback position. Next, when the case holder moves from the installation position to the playback position, the detection switch turns OFF at the installation position, turns ON mid-movement, and turns OFF again at the playback position, and the operating circuit recognizes the completion of the case holder movement and starts playback. However, if the movement of the case holder is not completed due to abnormal use, playback will not begin, so the disc will not get caught in the playback mechanism and be damaged, or fall out of the disc case. Become.

Embodiment Hereinafter, an optical disc reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows an exploded view of a commercially available disk case in one embodiment of the present invention. In Fig. 2, 6 is a disc case, 7 is an upper lid, 8 is a lower lid, 9 is a disc, and 10 is a disc case.
is an engagement hole provided in the lower cover 8, and is an engagement hole provided in the lower cover 8, and
The elastic protrusion 11 and the protrusion 12 of the upper lid 7 engage with each other. At this time, the upper cover 7 can be opened and closed using the engagement hole 1° as a fulcrum, and the disc 9 can be taken out while being stored in the disc case e. FIG. 2 shows the state before the disc case 6 is attached to the main body of the playback device in one embodiment of the present invention. In FIG. 1, 13 is a case receiving bottom plate, 14 is a left guide member fixed to the case receiving bottom plate 13, a detection lever 15 is held rotatably around a support shaft 1e, and a detection switch 18 is held by a spring 17. is biased to the position where it is turned on.

Reference numeral 19 denotes a mounting plate to which the detection switch 1 is fixed with screws 20, and is fixed with screws 22 to a left guide member 21 that movably holds the left guide member 14.

Reference numeral 23 denotes a right guide member fixed to the case receiving bottom plate 13, in which the engagement lever 24 is rotatably held around a support shaft 26, and the engagement recess 27 of the disc case 6 is held by a spring 26.
is biased into a position where it engages. 28 is the right guide member 2
The right guide member movably holds the take-out lever 29, and the take-out lever 29 is rotatably held around a support shaft 30, and is biased by a spring 31 to a position where it moves in conjunction with the engagement lever 24. Reference numeral 32 denotes a take-out button which is held in the cabinet 33 so as to be freely pushed and pulled, and is biased by a spring 34 to a position where the push-in portion 36 interlocks with the take-out lever 29 . Reference numeral 36 denotes a return lever, which is held by the case receiving bottom plate 13 so as to be rotatable about a support shaft 37, and is biased by a spring 38 so as to eject the disc case θ from the main body of the playback device. 3
Reference numeral 9 denotes a reproduction mechanism board, on which guide shafts 4o are fixed on both sides, and connected to a moving cam 42 having a stepped groove 41. 43 is a drive gear, which is fixed to a rotating plate 46 via a belt 46 from a drive motor 44 fixed to the regeneration mechanism. A positioning lever 47 is rotatably held by the right guide member 28 around a support shaft 48, and is urged by a spring 49 to a position where it engages with a positioning recess 60 provided in the right guide member 23. , rotating plate 4
6 rotates, its protruding end 51 rotates the positioning lever 47, and at the same time, the positioning lever 47 is released from the positioning recess 50, and at the same time, the rack 52 provided on the side surface of the right guide member 23 engages with the drive gear 43. When the drive motor 44' receives an operation command from the operation circuit 53 connected to the detection switch 18, it moves the right guide member 23 onto the reproduction mechanism board 39. 64 is a convex surface formed by the detection lever 16, and 64 is a convex surface formed by the left guide member 14.
It is formed on the same surface as 5. Reference numeral 56 denotes a recess formed continuously from the convex surface 55 of the left guide member 14, and the detection switch 18 is turned on when it comes into contact with the convex surfaces 64 and 55, and turned off when it comes into contact with the recess 56. Operation circuit 5
3 is configured to give an operation command to the drive motor 44 of the regeneration mechanism 39 when the detection switch 18 changes from ON to OFF, and the left guide member 14 moves onto the regeneration mechanism board 39 and the detection switch 18 changes from ON to OFF. O again
From FF to ON, and further to 0FF5, the drive motor 44 is stopped and a command is given to the regeneration mechanism that it may enter the regeneration state.

The operation of the optical disk reproducing apparatus configured as described above will be explained below with reference to FIGS. 3, 4, 5, and 6.

First, FIG. 3 shows the state in which the disc case 6 without the disc 90 is installed. When the disc case e is pushed in against the return lever 36, it engages with the engagement recess 27 of the disc case 6. The matching lever 24 is engaged and held. At this time, the detection lever 16 is
is in the same position as before it was installed, and the detection switch 18 is set to O.
Since the state remains N, the operation circuit 53 does not issue an operation command to the drive motor 44.

Next, FIG. 4 shows the state in which the disc case 6 containing the disc 9 is attached. When the disc case 6 is pushed against the return lever 36, it is inserted into the engagement recess 27 of the disc case 6. The engagement lever 24 is engaged and held. At this time, the detection lever 1S is pushed by the outer surface of the disk 9 and rotated in the inward direction, switching the detection switch 18 from ON to OFF, and the operation circuit 63 gives an operation command to the drive motor 44.

Next, FIG. 5 shows the operation of the drive motor 44. When an operation command is received from the operation circuit 63, the moving cam 44
2 moves in direction B to raise the playback mechanism board 39, and the drive gear 43 connected thereto also rises to the position of the disc to be played. Next, the rotating plate 4e rotates in the direction C, and the protruding end 61 rotates the positioning lever 47 to release the engagement from the positioning recess 60, and at the same time, the drive gear 4
3 engages with the rack 62.

Next, FIG. 6 shows the progress of moving the disk 9 to the reproduction position. When the drive gear 43 engages with the rack 62 and rotates in the C direction, the disk 9 starts moving in the E direction. At this time, the detection switch 18 is connected to the convex surface 64 of the detection lever 16 and the convex surface 56 of the left guide member 14.
During the movement, the switch is turned ON, and when the movement to the playback position is completed, the switch is turned OFF at the position of the recess 66 of the left guide member 14.
becomes. At this time, the detection lever 18 engages with a protrusion 57 provided on the left guide member 21 and separates from the outer surface of the disc, allowing the disc 9 to rotate freely and playback.At the same time, the operating circuit 63 is stopped by the drive motor 44. give commands,
The disc 9 is stopped at the playback position. Further, this stop command simultaneously serves as a command to the regeneration mechanism to start regeneration operation, and regeneration is performed. After the playback is finished, the disc 9 returns to the loading position by the reverse operation of the above explanation. However, to explain the operation of taking out the disc 9 from the main body of the playback device, when the eject button 32 is pressed, the push-in part 35 moves the eject lever 29. The protruding end 68 of the take-out lever 29 further rotates the engagement lever 24.

At this time, the engagement lever 24 is disengaged from the engagement recess 27 of the disc case 6, and the disc case 6 is ejected from the main body of the playback device by the reaction force of the return lever 36.

As described above, according to this embodiment, a plurality of commercially available disc cases holding discs can be attached to the main body of the playback device as is. It can be attached to and removed from the main unit, and other disc cases can be replaced during playback. In addition, the outer surface of the disc pushes the detection lever rotatably held in a part of the case holder that transports the commercially available disc case from the installation position to the playback position, and the detection switch is switched from ON to OFF. The operating circuit of the playback mechanism recognizes the presence of a disc, transmits an operating command to the drive motor, and transports the case holder, but when there is no disc, the detection switch remains ON and the operating command is not transmitted to the drive motor. Therefore, when a plurality of discs are played back consecutively, the next disc is played by passing through a location where there is no disc, so it is possible to shorten the waiting time during playback between discs. Also, when the case receiver is moved from the mounting position to the playback position by the drive motor, the cam surface formed by the side surface of the case receiver and the detection lever turns the detection switch from 0FF (mounting position) to ON (during the movement) and then to 0FF ( By switching to the playback position),
The operating circuit of the regeneration mechanism recognizes that the case holder has completed its movement and starts the regeneration operation at the same time as giving a stop command to the drive motor. Since the disc does not start operating, it is possible to prevent the disc from getting caught in the playback mechanism and being damaged, or from falling out of the disc case.

Effects of the Invention As described above, the present invention eliminates the work of replacing the disc by allowing the disc to be mounted in the main body of the playback device while being held in the commercially available disc case, and also prevents the signal readout surface of the disc from being mounted in the opposite direction. Prevents dirt and scratches on the disc.

In addition, by being able to switch to another disc while playing any one of multiple discs, it is possible to interrupt playback of a disc other than the installed disc, and it is possible to reserve an unlimited number of discs while continuing playback. be. Also,
During normal use when a commercially available disc case containing a disc is attached to the playback device, the detection switch turns from ON to OFF, and the operating circuit sends an operation command to the drive motor to move the case holder to the playback position. If there is no disc, the detection switch remains ON, so the operating circuit does not work and does not move to the playback position. Therefore, when playing multiple discs continuously, it will not pass through a location where there is no disc. Since the next disc is played back, the waiting time during playback between discs can be shortened.

Also, when the case holder moves from the mounting position to the playback position, the detection switch is OFF at the mounting position and ON during the movement.

At the regeneration position, it turns OFF again, and the operating circuit recognizes that the case holder has completed its movement, gives a stop command to the drive motor, and causes the regeneration mechanism to start the regeneration operation, but due to abnormal use, the case holder does not move. If the playback operation is not completed, the playback operation will not begin, so it is possible to provide a very safe device in which the disc will not get caught in the playback mechanism and be damaged or fall out of the disc case.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a commercially available disc case before it is attached to the playback device main body of this embodiment, and FIG. 2 is an exploded perspective view of a commercially available disc case used in the optical disc playback device of one embodiment of the present invention. , Fig. 3 is a perspective view of a commercially available disc case without a disc inserted into the main body of the playback device, Fig. 4 is a perspective view of a commercially available disc case with a disc inserted into the main body of the playback device, and Fig. 6 6 is a perspective view showing the operation of the drive motor of the same device, FIG. 6 is a perspective view showing the progress of moving the commercially available disc case to the playback position, and FIG. 7 is a perspective view showing a conventional example. 6...Disc case, 9...Disc, 13...Case receiving bottom plate, 14...
・Left guide member, 16...Detection lever, 18...
...Detection switch, 21...Left guide member, 23...Right guide member, 28...Right guide member, 39...Regeneration mechanism board , 42
...Movement cam, 43...Driving gear, 4
4... Drive motor, 46... Rotating plate,
62... Rack, 63... Operating circuit,
54...Detection lever convex surface, 56...Left guide member convex surface, 66...Left guide member recess, 57
...Left guide member protrusion.

Claims (2)

[Claims] (1) A guide member provided on both sides, a disc receiving member movably provided between the guide members, and a rotatably provided disc receiving member, detecting the presence or absence of a disc attached to the disc receiving member. a detection lever, a cam band formed in series by the detection lever and a side end of the disc receiving member, a detection switch fixed to the guide member, and a drive for moving the disc receiving member between the guide members. an operation circuit that recognizes a switching command from the detection switch and operates the drive section; and a playback section that plays the disc at a position where the disc receiving member has moved backward; When located at the front between the guide members, the detection lever detects the presence or absence of a disc mounted on the disc receiving member;
upon detecting that a disk is mounted, the detection lever switches the detection switch from a first position to a second position, and the operating circuit operates the drive motor;
When the disc receiving member is moved rearward and it is detected that no disc is mounted, the detection lever is configured not to switch the detection switch, and when the disc receiving member is moved rearward, Second
The detection switch at the position is switched to the first position by the cam band, and when the disk receiving member completes rearward movement, the detection switch is switched to the second position again, and the operating circuit is switched to the second position. An optical disc reproducing device, characterized in that the reproducing unit is configured to perform disc reproducing at the same time as the drive motor is stopped. (2) The optical disc playback device according to claim 1, wherein a plurality of commercially available disc cases holding discs can be directly attached to the disc receiving member.