JP3413757B2 - Rotary drive mechanism for rotary tray tray - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drive device for a rotor lister tray in a disc changer used for a disc player or the like that plays a disc by mounting the disc. 2. Description of the Related Art A conventional disk player for mounting and playing a disk is provided with a disk changer, and a plurality of disks are mounted on a rotor lister tray of the disk changer in advance to specify a disk desired to be played. In some cases, a designated disk is extracted from a rotor tray tray and transferred to a turntable of a disk player. In a disk player having a disk changer provided with such a rotor tray tray,
When a disc desired to be played is designated and the designated disc is extracted from the rotary tray, the control for stopping the rotation of the rotary tray is constant regardless of the number of loaded discs. [0004] However, in the case of the above-described conventional rotary drive device for the rotary stocker tray, when the number of discs that can be mounted is small, the rotary stocker tray rotates. Even when the stop control was constant, there was not much difference in the total weight of the discs depending on the number of loaded discs, so that no inconvenience was felt in the control. However, when the number of disks that can be placed on the rotor tray tray is as large as 200, for example, the weight of one CD disk is about 15 g, and the total weight is about 3 kg. In this case, since the rotation stop operation of the rotor tray tray is delayed, there is a problem that the stop at the reference position for performance is greatly shifted as compared with the state in which only one mounting disk is used. . An object of the present invention is to provide a rotary drive apparatus for a rotary stocker tray which can stop a desired disk at a reference position for accurate performance regardless of the number of disks placed on the rotary stocker tray. With the goal. SUMMARY OF THE INVENTION [0007] A rotary drive device for a rotor lister tray according to the present invention is a rotary drive device for a rotor lister tray in a disc changer having a rotor lister tray on which a disk is placed. A drive means for rotating a rotor lister tray in which an address number is previously assigned to a position where a disk is mounted, and a reference address number at a current rotor lister tray position opposite to a predetermined reference position. Means for specifying the disk to be extracted from the rotor tray tray or inserted into the rotor tray tray by the address number of the rotor tray tray, and a counter for counting the number of disks placed on the rotor tray tray Means and finger When the position corresponding to the address number specified by the setting means reaches the reference position during the rotation of the rotor tray tray, the rotation driving direction of the rotor lister tray is reversed in a period based on the number of disks counted by the counting means. And switching means for switching to [0008] According to the rotary drive device of the rotary storage tray according to the present invention, the number of disks mounted on the rotary storage tray is counted, and the designated address number position is set to the reference position during the rotary drive of the rotary storage tray. Since the rotation direction of the rotor tray tray is switched in the reverse direction for a period based on the counted number of disks from the time when the number of disks is reached, the inertia at the time of rotational drive differs based on the number of disks placed on the rotor lister tray. Nevertheless, it can be stopped early at the position corresponding to the designated address number. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a main part of a disk changer provided with a rotary driving device of a rotor tray tray according to an embodiment of the present invention. In the main part of the disk changer according to one embodiment of the present invention, a disk-shaped rotor tray tray 2 is rotatably mounted on a substrate 1. On the other hand, a rotor lister tray motor 4 and a power transmission mechanism 5 for driving the rotor lister tray 2 to rotate clockwise and counterclockwise are provided on the substrate 1, and the power transmission mechanism 5 is driven by driving the rotor lister tray motor 4. It is configured to drive the rotor lister tray 2 via the controller. Protrusions (not shown) are formed radially at equal angular intervals on the rotor tray tray 2, and between the adjacent protrusions, as shown in FIG. The disk 3 is placed radially in an upright state. Reference numeral 6 denotes a stopper for positioning the loaded disk 3. The disk 3 is inserted and mounted on and removed from the rotor tray tray 2 by a clamp arm 7 provided so as to be able to advance and retreat toward the center of the rotor tray tray 2, and the disk 3 is clamped by the clamp arm 7. The disc 3 placed at the position of the rotor tray tray 2 facing the tip of the tray 3 or placed at the position of the rotor tray tray 2 facing the tip of the clamp arm 7 is taken out by the clamp arm 7. In the present embodiment, the position of the rotor tray tray 2 facing the tip of the clamp arm 7 is set as the reference position. The insertion and mounting of the disk 3 on the rotor tray tray 2 is performed by inserting a clamp arm 7 which clamps the disk 3 toward the center of the rotor lister tray 2 by a drive device (not shown) and releasing the clamp. Done. The removal of the disk 3 from the rotor tray tray 2 is performed by the clamp arm 7.
Is moved toward the center of the rotor tray tray 2 by a driving device to clamp the disk 3, and the clamp arm 7 is driven in a direction away from the rotor tray tray 2 in the clamped state. The player is moved to a predetermined position. As shown in FIGS. 3 and 4, the rotor tray tray 2 is located on a predetermined radius on the back side of the rotor tray tray 2 and corresponds to the position where the disc 3 is placed. A protrusion B is formed on the rear side of the rotor tray tray 2 so as to be located on a predetermined radius on the outer peripheral side of the radius where the protrusion A is provided. The protrusions B are formed at intervals of 20 protrusions A, and as shown in FIG. 4B, the number of protrusions is incremented by 1 at intervals of 20 protrusions A, and are formed so as to be distinguishable from each other. For example, when 200 discs 3 can be placed on the rotor tray tray 2, the number of the protrusions A is 200, and the number of the protrusions B is 200.
0 (the number of projections), the projection B1 (two projections) on the left side (counterclockwise position) of the projection B0, and the projection B9 (projection) on the right side (clockwise position) of the projection B0. Number 9
), A projection B2 (three projections) on the right side of the projection B1, a projection B8 (eight projections) on the left side of the projection B9, and so on. Here, the term “projection B” refers to the projection B0,.
, B9, or as a generic term. Accordingly, 20 projections A are formed between the projections B0 and B1, and the numbers of the address numbers 1 to 20 from the projection B0 side to the projection B1 side are set as the address numbers on which the disk 3 is mounted. Numbered, projection B1 and projection B2
Are formed with 20 projections A, and address numbers 21 to 40 are assigned from the projection B1 side to the projection B2 side as an address number at which the disk 3 is placed,..., And the projection B9. Twenty projections A are formed between the projections B0 and the projections B9 as address numbers at which the disk 3 is mounted.
The numbers of the address numbers 181 to 200 are assigned from the side to the projection B0 side, and the rotor lister tray 2
The address numbers 1 to 2 are set at the positions where the upper disk 3 is placed.
00 is assigned in one-to-one correspondence. Further, a sensor support plate 8 is provided in the radial direction of the rotor stocker tray 2 at a position separated from the rotor stocker tray 2 by at least the size of the disk 3 and at an angle of 45 ° clockwise with respect to the axis of the clamp arm 7. Is provided. The sensor support plate 8 is provided with a light emitting diode 8C at a position where light is shielded by the disk 3 placed on the rotor tray tray 2. On the substrate 1, a first photocoupler 8A that is shielded from light by the projection A, a second photocoupler 8B that is shielded from light by the projection B, and a light emitting diode 8
A phototransistor 8c is provided at a position facing the light-emitting diode 8C.
c constitutes a third photocoupler. Accordingly, the rotation of the rotor tray tray 2 causes the first photocoupler 8A to detect the protrusion A, and the second photocoupler 8B to detect the protrusion B, and outputs the outputs of the first and second photocouplers 8A and 8B. Each address number is detected in cooperation. When the disk 3 is mounted, the light emitting diode 8C
Is blocked, and the placement of the disk 3 is detected by the third photocoupler. For example, the address number (40 + α) is detected by the number α (positive integer) of the protrusions A counted from the time when the protrusion B2 is detected by the clockwise driving of the rotor lister tray 2, and the number of protrusions A If the output of the third photocoupler is cut off when α is counted,
This means that the disk 3 is placed at the address number (40 + α). Accordingly, an address number is assigned to the position where the disk 3 is placed, and by rotating the rotor lister tray 2 clockwise one time, it is determined whether the disk 3 is placed at the position of the assigned address number. It is checked whether or not the address number on which the disk 3 is mounted is determined. This address number is made to correspond to the address number of the RAM of the control circuit 10 described later, and information on the presence or absence of the disk is stored in the address number. These operations are performed as initial settings when the power is turned on or when the door is opened / closed (when the disk is taken out of the rotor lister tray 2 or inserted and placed). It is to be noted that 20 pieces are placed on the rotor tray tray 2.
Since zero discs 3 are configured to be mounted, the number of the projections A is 200, the angle between adjacent projections A is 1.8 °, and the projections A are every 1.8 °. It is provided in. The protrusions B are provided every 36 °. Therefore,
By rotating the rotor lister tray 2 at least about 40 degrees clockwise or counterclockwise, one of the protrusions B is detected, an address number is obtained, and the current position of the rotor lister tray 2 can be confirmed. [0020] In the rotary drive device of the rotor lister tray according to the embodiment of the present invention, the first drive device further comprises:
And outputs from the second photocouplers 8A and 8B,
A microcomputer which receives the output from the photocoupler and performs a control including a rotation direction control when the disk 3 is inserted into the rotor lister tray 2 and when the disk 3 is removed from the rotor lister tray 2 in addition to the initial setting. A control circuit 10 comprising:
A key switch 11 designated for 0 and a rotor lister tray motor drive circuit 12 for driving the rotor lister tray motor 4 under the control of the control circuit 10 are provided. The control circuit 10 is provided with the RAM to perform initial setting and, in addition, to perform control including rotation direction control, an address number corresponding to a position opposing the reference position is referred to as a reference address number at the current rotor lister tray position. And a calculation unit for determining the rotation direction based on the difference between the next address number specified by the key switch 11 and the reference address number, and a storage unit 101 for storing the next address number specified by the key switch 11 102 and rotorist tray motor drive circuit 1
2, a switching unit 103 for switching the direction of rotation of the rotor tray tray 2 by the operation unit 102 in a direction opposite to the rotation direction obtained by the calculation unit 102, and a counting unit 104 for counting the number of disks 3 loaded by initialization. Functionally provided. In the rotary drive device of the rotor lister tray according to the embodiment of the present invention configured as described above, when the number of disks mounted on the rotor lister tray 2 is initially set, the counting unit 104 The position corresponding to the address number specified by the key switch 11 during the clockwise or counterclockwise rotation of the rotor lister tray 2 calculated by the arithmetic unit 102 is counted as the reference position. The switching unit 103 switches the rotation driving direction of the rotor lister tray 2 in a direction reverse to the rotation driving direction until the reference position is reached from the time when the rotation counter direction is reached. In this case, the driving time in the reverse direction is, for example, 20 msec when the number of discs placed on the rotor tray tray 2 is less than 50, 10 msec when the number of discs is 50 or more and less than 100, and 100 or more. 5m when
Set like sec. Since the inertia increases as the number of disks 3 placed on the rotor tray tray 2 increases, the rotation speed decreases. However, by setting the period of driving in the reverse direction based on the number of disks 3 placed on the rotor tray tray 2 as described above, excessive travel is suppressed. In the above description, the case where the disc 3 is a CD is shown as an example, but the same applies to other discs such as MDs and DVDs instead of CDs. As described above, according to the rotary drive device of the rotor lister tray according to the present invention, a desired disk can be accurately detected regardless of the number of disks placed on the rotor lister tray. The effect of being able to stop at the reference position for performance is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a main part of a disc changer provided with a rotary drive device of a rotor lister tray according to an embodiment of the present invention. FIG. 2 is a schematic diagram for explaining the arrangement of a disk and a photocoupler in a rotary drive device of a rotor tray tray according to an embodiment of the present invention. FIG. 3 is a schematic view for explaining the arrangement of the protrusions and the photocouplers of the rotor lister tray in the rotary driving device of the rotor lister tray according to one embodiment of the present invention. FIG. 4 is a schematic diagram for explaining projections of a rotor tray tray in the rotary driving device of the rotor tray tray according to one embodiment of the present invention. DESCRIPTION OF REFERENCE NUMERALS 1 board 2 rotor tray tray 3 disk 4 rotor tray tray motor 5 power transmission mechanism 7 clamp arm 8 sensor support plate 10 control circuit 11 key switch 12 rotor tray tray motor drive circuits 8A and 8B first and second Photocoupler 8C Light emitting diode 8c Phototransistor 101 Storage unit 102 Operation unit 103 Switching unit 104 Counting units A, B, B0, B1,..., B9 Projection

Claims (1)

(1) A rotary drive device for a rotor changer tray in a disk changer provided with a rotor lister tray on which a disk is mounted, wherein a position where the disk is mounted is previously addressed. A driving unit for rotating the rotor lister tray to which the number is assigned, a storage unit for storing an address number of a position facing a predetermined reference position as a reference address number at the current rotor lister tray position, Designating means for designating a disk to be extracted or inserted into the rotor tray tray by the address number of the rotor lister tray, counting means for counting the number of disks placed on the rotor lister tray, and an address number designated by the designating means The position corresponding to Switching means for switching the rotational driving direction of the rotor lister tray in the reverse direction for a period based on the number of disks counted by the counting means from when the reference position is reached during rotation driving of the stocker tray. Tray rotation drive.