JP3912974B2 - Disk transport mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk transport that sandwiches a disk-shaped recording medium (hereinafter abbreviated as a disk) such as a CD and transports the disk between an insertion / discharge port and a play position, or between a play position and a disk storage area. Relates to the device.
[0002]
[Prior art]
Among players used with loaded discs, in-vehicle CD players and the like often use a slot-in method in which a disc is directly inserted into the apparatus from an insertion / ejection port provided on the front panel. The disc is automatically transported to the play position by a disc transport mechanism built in the player. Conventionally, as such a disk transport mechanism, a plurality of drive pulleys are arranged in a row on a base plate and a drive force is applied to the peripheral edge of the disk, and the peripheral edge of the disk is transported. 2. Description of the Related Art A configuration in which a second guide body provided with a guide groove that guides along a direction is arranged to face each other so as to be movable in the proximity and separation directions is widely known. In such a disc transport mechanism, each drive pulley is rotated in the same direction with the disc sandwiched between the drive pulley and the guide groove so that the disc is transported while rolling along the guide groove. In order to prevent the disc and optical pickup from coming into contact with the first and second guide bodies during play, the distance between the two guide bodies is widened via a motor, a rack, or the like.
[0003]
[Problems to be solved by the invention]
Generally, in an in-vehicle CD player or the like, an anti-vibration measure is adopted in which a turntable or an optical pickup is supported via a damper mechanism during play in order to avoid the influence of vibration during vehicle travel. . Therefore, it is necessary to secure a sufficient clearance around the disc and the optical pickup during play. However, if the first and second guide bodies are to be retracted to the outside while ensuring such a clearance. In the conventional disk transport mechanism described above, the width of the player increases, making it difficult to cope with the 1DIN size. Therefore, a design that sacrifices the clearance to some extent is unavoidable, which is a factor that impairs the reliability of the anti-vibration measures.
[0004]
The present invention has been made in view of the actual situation of the prior art, and its purpose is to suppress a retreat space of a guide body in which a plurality of drive pulleys are arranged in a row, It is an object of the present invention to provide a disc transport mechanism that can avoid interference with an optical pickup and is advantageous in improving the reliability of anti-vibration measures and reducing the size of the apparatus.
[0005]
[Means for Solving the Problems]
In the present invention, a specific drive pulley of a guide body in which a plurality of drive pulleys are arranged in a row is driven by a link mechanism such as a rotating lever that interlocks with the retraction operation of the guide body, Retracted more than other drive pulleys. As a result, only a specific drive pulley that is likely to interfere with the disc or optical pickup during play can be retreated greatly, so that the entire guide body including other drive pulleys and the like need not be retreated greatly. In addition, the reliability of the anti-vibration measures required for in-vehicle players and the like can be secured. In the present invention, when the guide body is not retracted, the specific drive pulley is elastically biased and protrudes inward, so that the drive force is applied to the peripheral portion of the disk with which the drive pulley elastically contacts. Therefore, it can be expected to improve the conveyance capacity.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the disc transport mechanism of the present invention, a plurality of drive pulleys are arranged in a row and a first guide body that applies a driving force to one peripheral portion of the disc-shaped recording medium ; A second guide body having a guide groove for guiding a peripheral edge and disposed opposite to the first guide body, and both guides by moving the first and second guide bodies in the approaching and separating directions. and a guide member spacing changing means for changing the spacing of the body, clamp the inserted the disc-shaped recording medium from the insertion outlet between the guide groove and the plurality of drive pulleys, at least the play by the driving force in the disk transport mechanism for transporting to a position, the more of the drive pulley, and a pivot lever which is pivotally supported a particular drive pulley closest to the disc-shaped recording medium which is in the play position the tip, before And biasing means for the pivoting lever is elastically urged to project the particular drive pulley to the second guide side, interlocking the first guide member to the operation by a predetermined amount away from said second guide member And lever driving means for rotating the rotating lever against the elastic biasing force, and the guide body interval changing means moves the first guide body away from the second guide body. In the process of retracting the first guide body from the disk-shaped recording medium disposed at the position, the specific driving pulley is moved to another driving pulley as the rotating lever driven by the lever driving means rotates. On the other hand, it is configured to protrude toward the second guide body side.
[0007]
In the disc transport mechanism configured as described above, when the disc is placed at the play position and the first and second guide bodies are retracted to the outside, the lever driving means rotates against the elastic biasing force of the biasing means. In order to rotate the moving lever, the specific driving pulley pivotally supported at the tip of the rotating lever is retracted larger than the other driving pulleys and protrudes outward. Therefore, if this specific drive pulley is a drive pulley that is particularly concerned about interference with the disc or optical pickup during play, it is not necessary to largely retract the entire first guide body, so that the width dimension of the player can be reduced. Can be easily shortened. On the other hand, when the first and second guide bodies are in a position where the disc can be clamped, the specific drive pulley is elastically biased by the biasing means and protrudes inward. The drive pulley can be made to elastically contact the peripheral edge of the disk, and the drive force can be easily transmitted.
[0008]
In addition, if such a disc transport mechanism is incorporated into a vehicle-mounted player whose disc is supported by a damper mechanism at the play position, sufficient clearance is secured around the disc being played and the optical pickup while being compatible with 1DIN size. Therefore, the reliability of the anti-vibration measure is improved. For example, if the specific drive pulley is a drive pulley located at the innermost position in the disc conveyance direction, there is a risk that the drive pulley may come into contact with the disc or optical pickup being played even if vibration is applied while the vehicle is running. Lower.
[0009]
【Example】
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a state in which a disk is loaded in a changer type CD reproducing apparatus according to the embodiment, and FIG. 2 shows a first guide body shown in FIG. FIG. 3 is an explanatory diagram when the first guide body is in the retracted position, and FIG. 4 is a component configuration diagram of the link mechanism attached to the first guide body. It is.
[0010]
The changer-type CD playback device shown in FIG. 1 is a 1DIN-size-compatible in-vehicle device, and measures are taken to prevent vibration during play. This CD playback apparatus includes a disk drive mechanism (not shown) having a turntable for rotationally driving a disk 1 arranged at a play position, an optical pickup for reading the information, and a plurality of sheets behind the play position. A disk storage mechanism 2 capable of storing the disk 1, an insertion / discharge port (not shown) provided on the front panel, and a disk transport mechanism 10 that transports the disk 1 between the play position and between the play position and the disk storage area. As a countermeasure against vibration, the disc drive mechanism is supported by a damper mechanism (not shown) during play. In the disk storage mechanism 2, a plurality of stockers 5 that individually hold the disks 1 are inserted into a plurality of feed screws 4 erected on the chassis 3 in a screwed state, and the feed screws 4 are synchronized with each other. The stocker 5 can be moved up and down appropriately by rotating forward and backward.
[0011]
The disc transport mechanism 10 guides the peripheral portion of the disc 1 and the first guide body 11 that arranges a plurality of drive pulleys 13, 13 a and gears 14 in a row and applies a driving force to the peripheral portion of the disc 1. A second guide body 12 having a guide groove 12a to be opposed to the first guide body 11, and moving the first and second guide bodies 11 and 12 in the approaching and separating directions. The motor 15 and the rack 16 for changing the distance between the guide bodies 11 and 12 and the guide body distance changing means such as the first and second slide plates 17 and 18 are mainly configured. The rotational driving force of the driving pulleys 13 and 13a and the gear 14 is given by another motor (not shown), and the rotational driving force of the feed screw 4 is also given by the other motor via a transmission force switching mechanism (not shown). It is done.
[0012]
The first guide body 11 pivotally supports the drive pulley 13 and the gear 14 on the base plate 11 a integrated with the first slide plate 17, but only the innermost drive pulley 13 a has a rotating lever 19. It is pivotally supported at the tip of The rotating lever 19 is connected to one end of the connecting member 20 and is elastically biased counterclockwise by a tension spring 21 around the rotating shaft 19a. The other end of the connecting member 20 is connected to a fan-shaped lever 22, and the fan-shaped lever 22 can rotate around a rotation shaft 22a. The sector lever 22 is provided with a cut-and-raised portion 22 b, and this cut-and-raised portion 22 b is in sliding contact with the cam surface 23 a of the cam plate 23. The cam plate 23 is connected to the first slide plate 17 via a tension spring 24, and is slidable with respect to the first slide plate 17 and the base plate 11a while expanding and contracting the tension spring 24. Further, the cam plate 23 has a guide piece 23b that is slidably inserted through a protruding piece 23b that can come into contact with the restriction wall 3a integral with the chassis 3 and a cut-and-raised portion 17a of the first slide plate 17. A hole 23c is formed. The second guide body 12 is integrated with the second slide plate 18 and is designed so that the first and second slide plates 17 and 18 slide and move in the opposite directions by substantially the same distance. As a result, the first guide body 11 and the second guide body 12 approach and separate from each other in a substantially symmetrical manner. A detection switch 25 for determining whether or not the disc 1 is placed at the play position is disposed at an appropriate position of the second guide body 12.
[0013]
In the CD reproducing apparatus configured as described above, when the first guide body 11 is in the state shown in FIG. 2, the disk 1 can be sandwiched between the both guide bodies 11 and 12, and the drive pulleys 13 and 13a Thus, the disc 1 can be conveyed in the horizontal direction in the figure along the guide groove 12a while applying a driving force to the peripheral portion of the disc 1. At this time, the innermost drive pulley 13a of the first guide body 11 is located on the inner side (the second drive pulley 13) because the rotation lever 19 is pulled counterclockwise by the tension spring 21 in the figure. Slightly projecting toward the guide body 12 side). Therefore, the innermost drive pulley 13a is more resilient than the other drive pulleys 13 to easily contact the disk 1 to transmit the drive force, and the conveyance capacity is improved accordingly. On the other hand, in order to prevent the disc 1 and the optical pickup from coming into contact with the first and second guide bodies 11 and 12 during play, the first guide body 11 is moved outward (anti-second guide) to the position shown in FIG. Retreat to the body 12 side). During the retracting operation, the protrusion 23b abuts against the restriction wall 3a and the movement of the cam plate 23 is restricted, and then the first slide plate 17 and the base are moved while the cut-and-raised portion 17a is moved along the long hole 23c. Since the plate 11a slides with respect to the cam plate 23, the cut and raised portion 22b slides with respect to the cam surface 23a, and the fan-shaped lever 22 rotates counterclockwise in FIG. Therefore, the connecting member 20 is pushed rearward (upward in the figure), and the connecting member 20 rotates the rotating lever 19 in the clockwise direction in FIG. 2 against the elastic biasing force of the tension spring 21. As a result, as shown in FIG. 3, the innermost drive pulley 13 a is largely retracted to the outside of the other drive pulleys 13. The innermost drive pulley 13a is the portion of the first guide body 11 that is closest to the disk 1 and the optical pickup being played, so that only the drive pulley 13a is largely retracted as in this embodiment. If this is the case, a marginal clearance can be secured around the disk 1 and the optical pickup being played without substantially increasing the retreat space of the first guide body 11, and the reliability of the anti-vibration measures is improved. .
[0014]
Even if vibration prevention measures are not required, such as an in-vehicle player, if the drive pulley that is concerned about interference with the disk or optical pickup being played is retracted larger than other drive pulleys, Since it is possible to easily reduce the width dimension of the player, it is easy to promote downsizing.
[0015]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0016]
A specific drive pulley of a guide body in which a plurality of drive pulleys are arranged in a row is driven by a link mechanism such as a rotating lever that interlocks with the retracting operation of this guide body, and other drive pulleys during play Since the disc transport mechanism is configured to be retracted more largely than a specific drive pulley, only a specific drive pulley that is likely to interfere with the disc or the optical pickup during play can be retracted greatly. Therefore, it is possible to ensure the reliability of anti-vibration measures required for in-vehicle players and the like without greatly retracting the entire guide body including other drive pulleys and the like. In addition, even a player who has not taken special anti-vibration measures can save the space for retracting the guide body, so that the width dimension can be easily shortened, which is advantageous for downsizing. Further, when the guide body is not retracted, the specific drive pulley is elastically biased and protrudes inward, so that it is easy to transmit the drive force to the peripheral portion of the disk with which the drive pulley elastically contacts. Therefore, the improvement of the conveyance capability can be expected.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a state in which a disc is loaded in a changer-type CD player according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram when the first guide body shown in FIG. 1 is in a position where a disk can be conveyed;
FIG. 3 is an explanatory diagram when the first guide body is in a retracted position.
FIG. 4 is a component configuration diagram of a link mechanism attached to the first guide body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc 2 Disc storage mechanism 3 Chassis 4 Feed screw 5 Stocker 10 Disc transport mechanism 11 First guide body 11a Base plate 12 Second guide body 12a Guide groove 13, 13a Drive roller 14 Gear 15 Motor 16 Rack 17, 18 Slide Plate 19 Rotating lever 20 Connecting member 21 Tension spring (biasing means)
22 Fan-like lever 22b Cut and raised portion 23 Cam plate 23a Cam surface 24 Tension spring 25 Detection switch

Claims (3)

A plurality of drive pulleys arranged in a row to provide a first guide body for applying a driving force to one peripheral edge of the disk-shaped recording medium, and a guide groove for guiding the other peripheral edge of the disk-shaped recording medium A second guide body disposed opposite to the first guide body, and a guide body that moves the first and second guide bodies in the approaching and separating directions to change the distance between the two guide bodies. and a distance changing section, the disc-shaped recording medium inserted from the insertion outlet sandwiched between the guide groove and the plurality of drive pulleys, disk transfer mechanism for transferring to at least play position by the driving force In
Wherein the plurality of drive pulleys, and the pivot lever pivotally supported a particular drive pulley closest to the disc-shaped recording medium which is in the play position the tip portion, the specific said pivoting lever is elastically biased And a biasing means for projecting the drive pulley toward the second guide body, and an operation for moving the first guide body away from the second guide body by a predetermined amount in conjunction with the elastic lever. Lever driving means for rotating against the force,
In the process of retracting the first guide body from the disc-shaped recording medium disposed at the play position by moving the first guide body away from the second guide body by the guide body interval changing means , A disc transport mechanism, wherein the specific drive pulley protrudes toward the second guide body with respect to other drive pulleys as the rotation lever driven by the drive means rotates.   2. The disk-shaped recording medium according to claim 1, wherein the disk-shaped recording medium is incorporated in a disk reproducing and / or recording device supported by a damper mechanism at a play position, and the disk-shaped recording medium is inserted at least between the play position and the insertion / discharge port. A disc transport mechanism that is reciprocated.   3. The disk transport mechanism according to claim 1, wherein the specific drive pulley is a drive pulley located at the innermost position in the disk transport direction.

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