JP2004103056A - Disk changer system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correctly move the rotary tray housing many DVD disks to stop at a desired position. <P>SOLUTION: The disk changer, when moving the slot to a desired position, sets an interruption preventing timer beside an error timer and increases the drive power one level up to accelerate the rotation of the rotary tray 101 so that it does not interrupt if it can not move one slot before the interruption timer counts up. This disk changer repeats this process as required and prevents the rotary tray 101 from stopping before it reaches the desired position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disc changer device.
[0002]
[Prior art]
Recently, a disc changer device capable of storing a plurality of disc-shaped recording media such as a DVD (Digital Versatile Disc) and a CD (Compact Disc) and selectively reproducing each disc has been proposed.
[0003]
In the above-described conventional disk changer device, the storage format of the disk is various. For example, a rotary tray method is known in which a plurality of grooves (hereinafter, referred to as slots) extending radially in a radial direction are formed on a rotating disk, and disks are held and stored by fitting the disks in a standing state in the slots. Have been. In such a rotary tray type disk changer device, the disk is moved to a designated position by accelerating / decelerating the rotation speed of the rotary tray (for example, see Patent Document 1).
[0004]
In addition, if the disk cannot be moved to the designated position within a preset time, an error is displayed to notify the user that the disk could not be moved (for example, see Patent Document 2). ).
[0005]
[Patent Document 1]
JP-A-2000-222808 (pages 7-9, FIG. 1-4)
[Patent Document 2]
JP-A-10-188430 (page 3-5, FIG. 3-8)
[0006]
[Problems to be solved by the invention]
However, the conventional disk changer device employing the rotary tray system has the following problems. That is, an excessive load is applied to the motor due to environmental changes such as the weight and temperature of the disk stored in the rotary tray, and the rotational drive of the rotary tray may be greatly affected. For this reason, there is a case where the drive control of the rotary tray cannot be performed accurately.
[0007]
For example, when moving a slot to a designated stop target position, the more disks stored in the rotary tray, the faster and more accurately the inertia acts to stop the slot at the stop target position. It will be difficult. Further, the more the disk is stored in the rotary tray, the higher the possibility that the weight balance will be lost and the rotary tray will stop before the slot reaches the stop target position.
[0008]
In this case, conventionally, for example, the following error processing is performed. As shown in FIG. 12, when deceleration is started before the stop target position, an error timer is set (step S21), and the designated slot of the rotary tray cannot reach the predetermined stop target position before the error timer times out. In this case (step S26; Yes), error processing such as rotating the rotary tray in the reverse direction to stop at the stop target position is performed (step S27). Here, each time the slot passes the stop target position (or a separately determined reference position) while the deceleration is being continued because the designated slot has not yet reached the stop target position (step S25; Yes). (Step S22) Increment the slot number at the target stop position by one (Step S23) and decrease the number of slots to the target stop position by one (Step S24).
[0009]
However, it takes a lot of time to move the designated slot to the stop target position by rotating the rotary tray in reverse every time such an error occurs, and it is not easy to use. Such a case may occur every time the rotary tray is moved unless the number of discs and the deviation are eliminated.
[0010]
An object of the present invention is to provide a disc changer device that can accurately move a rotary tray capable of storing a large number of discs such as DVDs to a stop target position.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 is:
A disk storage unit in which a plurality of slots for storing disk-shaped recording media are formed one by one; a position detection unit for detecting the position of the slot; a driving unit for driving the disk storage unit; Control means for controlling the drive means to move a designated slot of the plurality of slots to a designated slot stop position based on a detection result by the means,
Timing detection means for detecting a passage timing when the slot passes a predetermined reference position,
Determining means for determining the presence or absence of a slot passing through the reference position within a predetermined reference time based on a detection result by the timing detection means,
The control means controls the driving means so as to increase the driving force of the driving means by a predetermined amount when the determining means determines that there is no slot passing through the reference position within the reference time. And
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the outline of the disc changer 10 to which the present invention is applied will be described in detail with reference to FIGS.
The disc changer 10 can store 400 discs. However, the number of discs that can be stored is not limited to 400, but can be 200, 150, or the like. Also, in the present embodiment, a DVD is described as a disk stored in the disk changer 10, but the present invention is applicable not only to a DVD but also to a CD or the like.
[0013]
In the present embodiment, a rotary tray 101 described later realizes the function of the disk storage unit described in the claims of the present invention, and a sensor group including the first sensor 104a to the third sensor 104c is a position detection unit. The functions of the right rotation rotary tray control motor 102a and the left rotation rotary tray control motor 102b realize the functions of the driving means, the microcomputer 106 realizes the functions of the control means, and the microcomputer 106 detects the timing. The function of the means and the function of the determination means are realized, and the RAM 106a realizes the function of the storage means.
[0014]
First, the configuration will be described. FIG. 1 shows an operation unit provided on the front surface of a disc changer 10 to which the present invention is applied.
As shown in FIG. 1, an operation unit provided on the front of the disc changer 10 is provided with a disc exchange port 10a and a display device 10b, and as operation keys, a disc exchange port open / close key 10c, a reproduction key 10d, A stop key 10e, a rotary tray operation dial 10f, a numeric keypad 10g, and the like are provided.
[0015]
The disk exchange opening 10a is opened and closed by a key operation of a disk exchange opening / closing key 10c or the like, and a predetermined number of disks can be exchanged with the disk exchange opening 10a opened. As described later, the display device 10b displays various display data output from the microcomputer 106. The display data includes, for example, an operating state such as during reproduction or pause, a slot number located at the center of the disk exchange slot 10a, a slot number of a disk being reproduced, and the like.
[0016]
The reproduction key 10d outputs an instruction signal to the microcomputer 106 to reproduce data of a disc in a slot designated in advance in response to a key operation by a user. The stop key 10e outputs, to the microcomputer 106, an instruction signal to stop the currently executing disc reproduction process in response to a key operation by the user.
[0017]
The rotary tray operation dial 10f outputs to the microcomputer 106 a signal instructing a rotation operation of the rotary tray 101 in accordance with a dial operation by a user. The numeric keypad 10g outputs, to the microcomputer 106, a slot number in which a disk to be played is loaded, a track number (song number) to be played, and the like in response to a key operation by the user.
[0018]
FIG. 2 is a plan view showing a schematic configuration of the storage unit 100.
As shown in FIG. 2, the storage unit 100 includes a rotary tray 101, a right rotating rotary tray control motor 102a, a left rotating rotary tray control motor 102b, a disc arm 103, a sensor support plate 104, and first sensors 104a to 104 on a substrate 105. The third sensor 104c and the disk presence / absence detection sensor 104d are mounted and configured. Signal lines indicated by reference numerals (1) to (6) in the figure are connected to the microcomputer 106 and its peripheral circuits (see FIG. 4).
[0019]
The rotary tray 101 is provided at the center of the substrate 105 and has 400 slots extending from the center thereof in the radial direction. The rotary tray 101 is fitted and held and stored in a state where a disk is set up in the slot.
[0020]
The rotary tray 101 performs a clockwise rotation (rotation in the direction indicated by the symbol R in the drawing) by the power supplied by the clockwise rotary tray control motor 102a, and rotates counterclockwise by the power supplied by the clockwise rotary tray control motor 102b. (The direction opposite to the direction indicated by the symbol R in the figure) is performed.
[0021]
Here, when the rotary tray 101 rotates clockwise, the current slot number stored in the RAM 106a described later is incremented by one, and when rotated counterclockwise, the slot number is decremented by one.
[0022]
The right-rotating rotary tray control motor 102a and the left-rotating rotary tray control motor 102b rotate the rotary tray 101 in accordance with a control signal output from the rotary tray control motor driver 110 via the signal line (6).
[0023]
The disk arm 103 operates according to a control signal output from the disk arm control motor driver 111 via the signal line (5). That is, in response to the control signal, the disk arm 103 pulls out the disk in the slot located at the disk transfer position P facing the disk arm 103 and sets it in a playback device (not shown). The disk is stored in the slot at the transport position P.
[0024]
Next, the first to third sensors 104a to 104c and the disk presence / absence detection sensor 104d will be described.
[0025]
The first sensor 104a and the second sensor 104b are both installed between the substrate 105 and the rotary tray 101, and determine the position of the slot on the rotary tray 101 (that is, the position of the rotary tray 101) and the rotation direction of the rotary tray 101. And outputs the signals PH1 and PH2 to the microcomputer 106 via the signal line (1) and the signal line (2), respectively.
[0026]
The first sensor 104a and the second sensor 104b are respectively located on two different diameters extending radially from the rotation center axis of the rotary tray 101, and have different distances from the rotation center of the rotary tray 101. I have. As a result, the signal PH1 output from the first sensor 104a and the signal PH2 output from the second sensor 104b are shifted by a predetermined time at the time of output (see FIG. 3A). Thus, the rotation direction of the rotary tray 101 can be determined. A method of determining the rotation direction of the rotary tray 101 will be described later in detail.
[0027]
The third sensor 104c is provided on the substrate 105, and outputs a signal PH3 for determining the position of the rotary tray 101 using the signals PH1 and PH2 to the microcomputer 106 via the signal line (3).
[0028]
The disk presence / absence detection sensor 104d is provided on a sensor support plate 104 provided above the rotary tray 101, and outputs a signal DISC for determining the presence / absence of a disk stored in the rotary tray 101 via a signal line (4). Output to the microcomputer 106.
[0029]
The first sensor 104a to the third sensor 104c and the disk presence / absence detection sensor 104d output each of the signals PH1 to PH3 and the signal DISC as Hi (High) or Low output according to the rotation operation of the rotary tray 101. I do.
[0030]
Next, a method for determining the rotation direction of the rotary tray 101, the position of the slot on the rotary tray 101, and the presence / absence of a disc based on the signals PH1 to PH3 and the signal DISC will be described with reference to FIGS. ) Will be described in detail.
The discriminating process (hereinafter, simply referred to as various discriminating processes) for discriminating the rotation direction of the rotary tray 101, the position of the slot, and the presence / absence of the disc described below is performed by a microcomputer 106 described later.
[0031]
For the sake of simplicity, only the above-described various types of discriminating processing when rotating clockwise will be described, and the discriminating processing when rotating counterclockwise will not be described because it is the same as that for rotating clockwise.
[0032]
FIG. 3A is a timing chart of the signals PH1 to PH3 and the signal DISC output from each of the first sensor 104a to the third sensor 104c and the disk presence / absence detection sensor 104d when the rotary tray 101 is rotating clockwise. FIG. 3B is a table showing the correspondence between the slot numbers of the slots on the rotary tray 101 and the groups.
[0033]
First, a method of determining the rotation direction of the rotary tray 101 will be described.
Although the output timings of the signal PH1 and the signal PH2 are shifted from each other by a predetermined time, the rotation direction of the rotary tray 101 can be determined using the difference. When the signal PH2 also rises from Low to Hi after the signal PH1 rises from Low to Hi (or when the signal PH2 also falls from Hi to Low after the signal PH1 falls from Hi to Low), the rotary tray 101 Is determined to be clockwise rotation (rotation in the direction indicated by the symbol R in FIG. 2). Conversely, after the signal PH2 rises from Low to Hi, the signal PH1 also rises from Low to Hi (or the signal PH1 also falls from Hi to Low after the signal PH2 falls from Hi to Low). , The rotary tray 101 is determined to rotate counterclockwise. The method of associating the rotation direction of the rotary tray 101 with the left and right directions is arbitrary, and may be the reverse of this embodiment.
[0034]
Next, a method of determining the position of the slot (the position of the rotary tray 101) will be described.
The rotary tray 101 is provided with a plurality of sections in the circumferential direction in advance, and the numbers of slots formed in these sections are all different from each other. Here, the third sensor 104c outputs a Low signal corresponding to the length (the number of slots) of each of the plurality of sections as the signal PH3. Therefore, by counting the number of Low sections (ie, the number of slots) of the signal PH1 included in the Low section of the signal PH3 (the section from falling from Hi to Low to further becoming Hi), the slot position (the number of slots) is counted. The position of the rotary tray 101) can be determined. Hereinafter, the description will be made assuming that the number of Low sections and the number of slots of the signal PH1 have the same meaning.
[0035]
As shown in the table of FIG. 3B, the number of Low sections of the signal PH1 included in the Low section of the signal PH3 indicates the group numbers of the slots on the rotary tray 101 that have been grouped in advance. As shown in the figure, each group includes 25 (the number of slots) the number of Low sections of the signal PH1 from the start of the Low section of the signal PH3 to the start of the next Low section. including. For example, the group 5 in the table in the same drawing includes a total of 25 slots with slot numbers 101 to 125 between the start of the Low section of the signal PH3 and the start of the next Low section. The Low section of PH3 includes five slots of slot numbers 101 to 105 (Low section of the signal PH1), and the slot numbers 106 to 125 are provided between the end of the Low section and the start of the next Low section. (Low section of the signal PH1).
[0036]
Next, a method for determining the presence or absence of a disk will be described.
When the signal PH1 rises from Low to Hi when the rotary tray 101 rotates clockwise, and then the signal PH2 further rises from Low to Hi, a slot comes to the detection position of the disk presence / absence detection sensor 104d. The disk presence / absence detection sensor 104d outputs the signal DISC by one pulse when a disk is loaded in the slot, and outputs the signal DISC by Low when no disk is loaded (that is, does not output a pulse). . The microcomputer 106 detects the signal DISC for approximately 20 ms when the signal PH1 rises from Low to Hi, and then the signal PH2 rises from Low to Hi, and determines the presence or absence of the disk.
[0037]
Next, the configuration of the control system of the disc changer 10 will be described in detail with reference to FIG.
FIG. 4 is a functional block diagram showing a configuration of a control system of the disc changer 10. As shown in FIG.
[0038]
As shown in FIG. 4, the disk changer 10 includes a microcomputer 106, a RAM 106a, an input unit 107, a display unit 108, a disk exchange opening / closing control motor driver 109, a rotary tray control motor driver 110, a disk arm control motor driver 111, and a DSP 112. , A pickup unit 113, a load / unload SW 114, a disk exchange opening / closing control motor 115, and the like, except for the input unit 107, the display unit 108, the pickup unit 113, the load / unload SW 114, and the disk exchange opening / closing control motor 115. Each unit is connected by a plurality of buses.
[0039]
The microcomputer 106 opens and closes the disk exchange opening 10a, rotates the rotary tray 101, and operates the disk arm 103 in response to operation signals from various operation keys and operation dials (see FIG. 1) provided in the input unit 107. And a playback operation of a playback device (not shown).
[0040]
The microcomputer 106 performs the above-described various determination processes based on the signals PH1 to PH3 and the signal DISC output from each of the first sensor 104a to the third sensor 104c and the disk presence / absence detection sensor 104d.
[0041]
The microcomputer 106 stores the processing results of the above-described various determination processes, that is, the rotation direction of the rotary tray 101, the position of the slot, and the presence or absence of the disk in the RAM 106a.
[0042]
The microcomputer 106 transmits a rotation drive control signal (right rotation drive signal and left rotation drive signal shown in FIGS. 5 and 6) for accurately rotating the rotary tray 101 clockwise or counterclockwise by a predetermined slot. Send to driver 110. That is, the microcomputer 106 instructs the rotary tray control motor driver 110 to turn on / off the right rotation drive of the rotary tray 101 with the right rotation drive signal Hi / Low to adjust the right rotation drive force, and The ON / OFF of the left rotation of the tray 101 is instructed to the rotary tray control motor driver 110 by the left / right rotation driving signal Hi / Low to increase or decrease the left rotation driving force. The microcomputer 106 accelerates and decelerates the rotary tray 101 by increasing or decreasing the driving force. In particular, when the right rotation drive signal and the left rotation drive signal are both Hi at the same time, the largest braking force acts on the rotary tray 101 (hereinafter, referred to as a sudden brake), and the right rotation drive signal and the left rotation drive signal are output. At the same time, in the case of Low, the rotary tray 101 enters a free rotation state in which no braking force acts.
[0043]
A plurality of driving force levels based on the rotation drive control signal are set in advance. As the level of the driving force, for example, level 0 (no driving force) to level 10 (upper limit of driving force) are set, and the data is stored in the RAM 106a in advance. The microcomputer 106 sequentially stores the current driving force level in the RAM 106a, and based on the current driving force level stored in the RAM 106a, changes the driving force level for a predetermined time or the rotary tray 101 when the driving force increases. The driving force level is sequentially decreased by one level for each predetermined rotation speed, and when the driving force is decreased, the driving force level is sequentially decreased by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101.
[0044]
The microcomputer 106 increases and decreases the driving force of the rotary tray 101 based on the various driving force increase / decrease patterns shown in FIGS. Perform control. 5 and 6 show timing charts of the rotation drive control signal in various drive force increase / decrease patterns.
[0045]
The right rotation driving force increase pattern A11 shown in FIG. 5A and the right rotation driving force increase pattern A21 shown in FIG. 60A are output patterns of the rotation driving control signal when increasing the right rotation driving force.
When the right rotation driving force is increased based on the right rotation driving force increasing pattern A11 to accelerate the rotary tray 101, the microcomputer 106 outputs the left rotation driving signal to Hi / Low while outputting the right rotation driving signal to Hi. Are repeated, and the right rotation driving force is increased by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101 by shortening the Hi time of the left rotation driving signal and increasing the Low time. To accelerate the rotary tray 101 rightward.
When the right rotation driving force is increased based on the right rotation driving force increasing pattern A21 to accelerate the rotary tray 101, the microcomputer 106 outputs the right rotation driving signal to Hi / Low while the left rotation driving signal is output at Low. Are repeated so that the right rotation driving signal is increased by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101 by increasing the Hi time of the right rotation driving signal and shortening the Low time. To accelerate the rotary tray 101 rightward.
[0046]
A right rotation driving force decreasing pattern A12 shown in FIG. 5B is an output pattern of a rotation driving control signal when the right rotation driving force is reduced.
When decelerating the rotary tray 101 by reducing the right rotation driving force based on the right rotation driving force reduction pattern A12, the microcomputer 106 outputs the left rotation driving signal to Hi / Low while outputting the right rotation driving signal at Hi. Are repeated so that the right rotation driving force is reduced by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101 by increasing the time of Hi of the left rotation driving signal and shortening the time of Low. To decelerate the rotary tray 101 rightward.
[0047]
A left rotation driving force increase pattern B11 shown in FIG. 5C and a left rotation driving force increase pattern B21 shown in FIG. 60B are output patterns of the rotation driving control signal when increasing the left rotation driving force.
When accelerating the rotary tray 101 by increasing the left rotation driving force based on the left rotation driving force increase pattern B11, the microcomputer 106 outputs the right rotation driving signal to Hi / Low while outputting the left rotation driving signal at Hi. Are repeated so that the right rotation drive signal Hi time is shortened and the Low time is increased to increase the left rotation driving force by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101. To accelerate the rotary tray 101 to the left.
When accelerating the rotary tray 101 by increasing the left rotation driving force based on the left rotation driving force increase pattern B21, the microcomputer 106 outputs the left rotation driving signal to Hi / Low while outputting the right rotation driving signal at Low. Are repeated so that the left rotation drive signal is increased by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101 by increasing the time of Hi of the left rotation drive signal and shortening the time of Low. Then, the rotary tray 101 is accelerated to the left.
[0048]
A left rotation driving force reduction pattern B12 shown in FIG. 5D is an output pattern of a rotation driving control signal when the left rotation driving force is reduced.
When decelerating the rotary tray 101 by reducing the left rotation driving force based on the left rotation driving force reduction pattern B12, the microcomputer 106 outputs the right rotation driving signal to Hi / Low while outputting the left rotation driving signal at Hi. Are repeated so as to increase the Hi time of the right rotation drive signal and shorten the Low time, thereby reducing the left rotation drive force by one level for a predetermined time or every predetermined rotation speed of the rotary tray 101. To decelerate the rotary tray 101 to the left.
[0049]
When the microcomputer 106 rotates the stopped rotary tray 101 rightward, the microcomputer 106 increases the right rotation driving force based on the right rotation driving force increase pattern A21 as shown in FIG. When rotating the stopped rotary tray 101 to the left, the rotary tray 101 is accelerated by increasing the left rotation driving force based on the left rotation driving force increase pattern B21 as shown in FIG. 7B. I do.
[0050]
The microcomputer 106 increases the right or left rotation driving force of the stopped rotary tray 101 based on the driving force increase time at the start of rotation shown in the table of FIG. 7C. For example, when the rotary tray 101 is moved by 20 slots (the number of movement target slots is 20), the right rotation drive is performed until six slots (the number of movement slots when the driving force is increased) from the start of rotation move. The right rotation or left rotation drive force of the rotary tray 101 is increased based on the force increase pattern A21 or the left rotation drive force increase pattern B21.
[0051]
The microcomputer 106 stops the rotary tray 101 halfway in order to prevent the rotary tray 101 from stopping halfway before the stop target position due to the weight of the loaded disc, the temperature, or the like while the rotary tray 101 is moving (especially during deceleration). Perform preventive action. For example, as shown in FIG. 8, the microcomputer 106 determines that the signal PH1 has fallen from Hi to Low during the deceleration of the rotary tray 101 based on the clockwise driving force reduction pattern A12, and the halfway stop prevention timer (for example, 50 ms). If the signal PH1 does not rise from low to high before the timer expires, the timer PH is set to the right based on the right rotation driving force increasing pattern A11 so that the rotary tray 101 does not stop immediately. The rotational driving force is increased by one level, and the halfway stop prevention timer is reset. Further, if the signal PH1 has not yet risen from Low to Hi before the reset timer times out, the right rotation driving force is further increased by one level based on the right rotation driving force increase pattern A11. Such processing is repeated as necessary to prevent the rotary tray 101 from stopping halfway.
This halfway stop prevention process is shown in the flowchart of FIG. 11, and will be described later in detail.
[0052]
The microcomputer 106 measures the Low period of the signal PH1 during the deceleration of the rotary tray 101 until, for example, 5 slots remain before the stop target position. Then, based on the measured Low time, the speed of the rotary tray 101 is reduced to a rotational speed (in this case, for example, 19 to 40 ms) in which the speed of the rotary tray 101 is easily stopped by abrupt braking and hard to stop naturally in the middle of the rotation, and the remaining time before the stop target position 5 Drive control is performed so as to maintain the slot. Here, the Low section of PH1 refers to a time from when the signal PH1 falls from Hi to Low and then rises from Low to Hi.
[0053]
For example, as shown in FIG. 9, when the Low time of the signal PH1 exceeds 40 ms while the rotary tray 101 is decelerating to the right based on the right rotation driving force decrease pattern A12, the microcomputer 106 determines that the Low section Upon completion, the right rotation driving force is increased by one level based on the right rotation driving force increase pattern A11. Further, if the Low time of the next signal PH1 still exceeds 40 ms, the microcomputer 106 further increases the right rotation driving force by one level based on the right rotation driving force increase pattern A11 at the end of the Low section. increase. The microcomputer 106 repeatedly performs such processing as necessary, and easily stops the speed of the rotary tray 101 by abrupt braking before reaching the remaining five slots before the stop target position, and naturally stops halfway. Maintain a difficult rotation speed of 19 to 40 ms.
[0054]
When the microcomputer 106 rotates the rotary tray 101 clockwise or counterclockwise by a predetermined number of slots (six or more), the microcomputer 106 rotates clockwise based on the drive power increase time at the start of rotation shown in the table of FIG. Alternatively, after increasing the left rotation driving force, the right rotation driving force or the left rotation driving force is reduced based on the right rotation driving force reduction pattern A12 or the left rotation driving force reduction pattern B12, and then the slot is moved to the stop target position in five slots. Then, during the clockwise rotation, while moving one slot, the right rotation driving force increase based on the right rotation driving force increase pattern A11 and the right rotation driving force decrease based on the right rotation driving force decrease pattern A12 are repeated. A left rotation driving force increase based on the rotation driving force increase pattern B11 and a left rotation driving force decrease based on the left rotation driving force reduction pattern B12 are repeated. One by one to move to the slot return. Further, in this case, the microcomputer 106 simultaneously performs the halfway stop prevention processing shown in the flowchart of FIG.
[0055]
Here, FIG. 10 shows a timing chart illustrating an example of rotational driving of the rotary tray 101 when the rotary tray 101 is moved rightward to move a predetermined slot (hereinafter, referred to as a slot N) to the disk transfer position P. Here, as shown in FIG. 10, the number of slots (hereinafter referred to as the number of remaining slots) that must be moved before the slot N reaches the disk transfer position P when the deceleration of the rotary tray 101 is started is, for example, It is assumed that there are more than 21.
[0056]
As shown in FIG. 10, the microcomputer 106 reduces the right rotation driving force based on the right rotation driving force reduction pattern A12 and decelerates the rotary tray 101 rightward until the number of remaining slots becomes five. Thereafter, when the number of remaining slots becomes five, the microcomputer 106 increases the right rotation driving force based on the right rotation driving force increase pattern A11 in the section B1 of the signal Hi to accelerate the rotary tray 101 rightward, Next, in the section B2 where the signal PH1 is Low, the right rotation driving force is reduced based on the right rotation driving force reduction pattern A12, and the rotary tray 101 is decelerated to the right. Thereafter, when the number of remaining slots becomes four, the microcomputer 106 increases the right rotation driving force based on the right rotation driving force increase pattern A11 in the section B3 in which the signal PH1 is Hi and accelerates the rotary tray 101 rightward. Then, when the signal PH1 becomes Low, the right rotation driving force is reduced based on the right rotation driving force reduction pattern A12, and the rotary tray 101 is decelerated to the right. Thereafter, the microcomputer 106 continues this drive processing, and when the number of remaining slots becomes 1, the signal PH1 increases the right rotation driving force based on the right rotation driving force increase pattern A11 in the section B4 of Hi, and causes the rotary tray 101 to rotate. The rightward driving force is reduced based on the rightward driving force decrease pattern A12 in a section B5 where the signal PH1 is low, and the rotary tray 101 is decelerated rightward. Thereafter, when the signal PH1 becomes Hi, the microcomputer 106 freely rotates the rotary tray 101 in the section B6 before the slot N reaches the disk transfer position P, and then smoothes the operation of stopping the rotary tray 101. In section B7, a back pulse is applied to the rotary tray 101 (only the left rotation driving force is applied to the left rotation rotary tray control motor 102b). Then, immediately before the rear slot N of the section B7 reaches the disk transfer position P, a sudden brake (right The rotary tray 101 is stopped by applying Hi) to both the rotation drive signal and the left rotation drive signal.
By the above processing, the slot N is moved to the disk transfer position P.
[0057]
The RAM 106a stores a main control program for controlling the disc changer 10 and various application programs related to the program, and also temporarily stores an execution file of these various programs and various data generated when the programs are executed. To form
[0058]
The RAM 106a stores a program for controlling the driving of the rotary tray 101 (particularly, a program for the halfway stop prevention processing shown in FIG. 11). Further, the RAM 106a stores time data of a halfway stop prevention timer required when executing the halfway stop prevention processing program, and driving force increase time data at the start of rotation of the rotary tray 101 shown in the table of FIG. Stores various time data.
[0059]
The RAM 106a stores data indicating the rotation direction of the rotary tray 101, the position of the slot, and the presence / absence of the disk calculated by the microcomputer 106 at the time of the various types of discrimination processing. An increase level or a decrease level of the driving force is stored.
[0060]
The input unit 107 includes a disk exchange opening / closing key 10c for instructing opening / closing of the disk exchange opening 10a, a reproduction key 10d for instructing disk reproduction processing, a stop key 10e for instructing stop of reproduction processing, and instructing a rotary operation of the rotary tray. Various operation keys and operation dials related to the operation of the disc changer 10, such as a rotary tray operation dial 10f, a ten key 10g for selecting a slot number in which a playback disc is loaded and a track number on the disc, and the like. An operation unit provided on the front surface of the disc changer 10 shown in FIG.
[0061]
The display unit 108 includes a display device 10b such as an LCD (Liquid Crystal Display). The display unit 108 displays various display data output from the microcomputer 106 on the display device 10b. For example, the track number of the disc being reproduced, TOC (Table Of Contents) data of the disc being reproduced, various operation modes of the disc changer 10 (during rotational movement, disc search, and the like), the open / close state of the disc exchange slot 10a, and the like. indicate.
[0062]
The disk exchange opening / closing control motor driver 109 drives a disk exchange opening / closing control motor 115 (see FIG. 2) for opening and closing the disk exchange opening 10a based on a control signal output from the microcomputer 106.
[0063]
The rotary tray control motor driver 110 drives the right rotation rotary tray control motor 102a and the left rotation rotary tray control motor 102b based on the right rotation drive signal and the left rotation drive signal output from the microcomputer 106.
[0064]
The disk arm control motor driver 111 drives a disk arm control motor (not shown) for operating the disk arm 103 based on a control signal output from the microcomputer 106.
[0065]
A DSP (Digital Signal Processor) 112 converts encoded digital data output from the pickup unit 113 into a data format that can be processed by the microcomputer 106 at high speed, and outputs the data to the microcomputer 106. The DSP 112 can perform data processing based on the MPEG2 (Moving Picture Experts Group2) method of DVD.
[0066]
The pickup unit 113 reads out digital data such as video and music recorded on a disc set in the reproducing device (not shown) and outputs the digital data to the DSP 112.
[0067]
The load / unload SW 114 determines whether to download the TOC data or the like of the disc set in the above-described playback device or to clear the already downloaded TOC data or the like when releasing the disc from the playback device. An instruction signal is output to the microcomputer 106.
[0068]
The disc changer 10 can be connected to an external recording device. In this case, the microcomputer 106 can output the reproduction data read from the disk to a connected external recording device and record the data on a predetermined recording medium provided in the external recording device.
[0069]
Next, the operation of the disc changer 10 to which the present invention is applied will be described with reference to FIG.
[0070]
FIG. 11 is a flowchart illustrating the halfway stop prevention processing. Hereinafter, the rotary tray 101 rotates clockwise until the slot N reaches the disk transfer position P facing the disk arm 103, but the rotary tray 101 is not limited to this and may rotate counterclockwise. Further, although the stop target position of the slot N is the disk transfer position P, the present invention is not limited to this, and may be a disk exchange position (not shown) provided in the disk exchange port 10a.
[0071]
When the microcomputer 106 decelerates the rotary tray 101 that is rotating clockwise right before the slot N reaches the disk transfer position P, the microcomputer 106 reduces the right rotation driving force based on the right rotation driving force reduction pattern A12 and And the error timer and the halfway stop prevention timer are set (steps S11 and S12). The time up time of the error timer is longer than the time up time of the halfway stop prevention timer.
[0072]
After step 12, the microcomputer 106 determines whether the signal PH1 output from the first sensor 104a has risen from Low to Hi, that is, there is a slot that has passed the first sensor 104a since the halfway stop prevention timer was set. It is determined whether or not the signal PH1 has risen from Low to Hi, that is, if there is a slot that has passed the first sensor 104a (Step S13; Yes), the slot number stored in the RAM 106a (in this case) , The slot number at the disk transport position P is not limited to this, but the slot number must be updated by adding 1 to the slot number (step S14), and the slot N must move until the disk transport position P is reached. The number of slots (this data is also stored in the RAM 106a) Inasu 1 updates (step S15).
[0073]
After step S15, the microcomputer 106 determines whether or not to continue the deceleration of the rotary tray 101 (step S16). If there is no instruction to release the deceleration and the deceleration of the rotary tray 101 is continued (step S16; Yes) ), The process proceeds to step S12, and when the deceleration of the rotary tray 101 is released in response to the deceleration release instruction (step S16; No), the halfway stop prevention process ends.
[0074]
At the stage of step S13, if the signal PH1 does not rise from low to high, that is, if there is no slot that has passed the first sensor 104a (step S13; No), the microcomputer 106 has timed out the stoppage prevention timer and the error timer. It is monitored (step S17, step S19), and if neither the halfway stop prevention timer nor the error timer has timed out (step S17; No, step S19; No), the process proceeds to step S13.
[0075]
When the halfway stop prevention timer times out at the stage of step S17 (step S17; Yes), the microcomputer 106 increases the right rotation driving force by one level based on the right rotation driving force increase pattern A11 (step S18). Move to step S12.
[0076]
If the error timer has expired at the stage of step S19 (step S19; Yes), error processing is performed (step S20). That is, the microcomputer 106 moves the slot N to the disk transfer position P by rotating the rotary tray 101 backward (in this case, rotating left) in this error processing.
[0077]
As described above, when moving the predetermined slot to the predetermined stop target position, the disc changer 10 sets the halfway stop prevention timer in addition to the error timer, and waits until the halfway stop prevention timer times out. If it cannot be moved by one, the driving force is increased by one level and the rotary tray 101 is accelerated. The disc changer 10 repeats this processing as necessary, and prevents the rotary tray 101 from stopping halfway until the slot moves to the stop target position.
[0078]
Therefore, even if a load is applied to the drive motor of the rotary tray 101 due to storage of a large number of disks, uneven storage of the disks, or changes in the environment such as temperature, etc. The tray 101 can accurately move to the stop target position without stopping before the stop target position during deceleration.
[0079]
Note that the present invention is not limited to the contents of the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention. For example, in the present embodiment, a DVD is assumed as a disk to be loaded in the disk changer 10, but the present invention is not limited to this, and can be applied to other recording media such as a CD.
[0080]
Further, the microcomputer 106 determines the rotation direction of the rotary tray 101 using the signal PH2. However, the determination of the rotation direction of the rotary tray 101 is not limited to this method, and may be a method that does not use the signal PH2. good. Further, although the rotary tray 101 is rotatable in both the left and right directions, it may be rotatable in only one of the right and left directions.
[0081]
Further, the microcomputer 106 resets the halfway stop prevention timer when the signal PH1 rises from Low to Hi, but is not limited to this, and sets the halfway stop prevention timer when the signal PH1 falls from Hi to Low. The timer may be reset, or the midway stop prevention timer may be reset when the signal PH2 rises from Low to Hi or falls from Hi to Low.
[0082]
The halfway stop prevention timer is set when the slot N of the rotary tray 101 decelerates the rotary tray 101 that is rotating clockwise just before the slot N of the rotary tray 101 reaches the disk transfer position P as shown in FIG. Alternatively, if the rotary tray 101 is moving, the timer may be used as needed to further prevent the rotary tray 101 from being stopped halfway.
[0083]
In addition, all of the plurality of numerical values described in the above embodiments are examples, and the disc changer of the present invention is implemented with preferable numerical values according to the actual device configuration.
[0084]
【The invention's effect】
According to the present invention, a rotary tray capable of storing a large number of disks such as DVDs can be accurately moved to a target position.
[Brief description of the drawings]
FIG. 1 is a diagram showing an operation unit provided on a front surface of a disc changer to which the present invention is applied.
FIG. 2 is a plan view showing a schematic configuration of a storage section of a disc changer to which the present invention is applied.
3A shows signals PH1 to PH3 output from each of a first sensor to a third sensor and a disk presence / absence detection sensor shown in FIG. 2 when the rotary tray shown in FIG. 2 is rotating clockwise. FIG. 4B is a timing chart of the signals DISC, and FIG. 4B is a table showing the correspondence between the slot numbers of the slots on the rotary tray shown in FIG. 2 and the groups.
FIG. 4 is a functional block diagram showing a configuration of a control system of a disc changer to which the present invention is applied.
5A is a timing chart for explaining a right rotation driving force increasing pattern of the rotary tray shown in FIG. 2; FIG. 5B is a timing chart for explaining a right rotation driving force decreasing pattern of the rotary tray shown in FIG. 5; (C) is a timing chart for explaining the pattern for increasing the left rotation driving force of the rotary tray shown in the figure, and (d) is a timing chart for decreasing the left rotation driving force of the rotary tray shown in the figure. 6 is a timing chart for explaining FIG.
FIG. 6A is a timing chart for explaining another right rotation driving force increase pattern of the rotary tray shown in FIG. 2, and FIG. 6B is another timing chart of the rotary tray shown in FIG. It is a timing chart explaining an increase pattern.
7A is a timing chart for explaining the rotation driving of the rotary tray shown in FIG. 2 at the start of right rotation, and FIG. 7B is a timing chart of the rotary tray shown in FIG. Is a table showing the driving force increase time at the start of rotation of the rotary tray shown in FIG.
FIG. 8 is a timing chart for explaining driving force control at the time of a midway stop prevention process of a rotary tray by a disc changer to which the present invention is applied.
FIG. 9 is a timing chart for explaining driving force control when the rotary tray is decelerated by the disc changer to which the present invention is applied.
FIG. 10 is a timing chart illustrating drive force control by a disc changer to which the present invention is applied just before the stop of the rotary tray.
FIG. 11 is a flowchart illustrating processing for preventing a rotary tray from being stopped halfway during deceleration by a disc changer to which the present invention is applied.
FIG. 12 is a flowchart illustrating a process performed when a rotary tray is decelerated by a conventional disk changer.
[Explanation of symbols]
10 Disc changer
100 storage section
101 Rotary tray
102a Right rotation rotary tray control motor
102b Left-rotating rotary tray control motor
103 disk arm
104 Sensor support plate
104a first sensor
104b second sensor
104c third sensor
104d Disk presence sensor
105 substrate
106 microcomputer
106a RAM
107 Input unit
108 Display
109 Disk drive opening / closing control motor driver
110 Rotary tray control motor driver
111 Disk arm control motor driver
112 DSP
113 Pickup unit
114 Load / Unload SW
115 Disc opening / closing control motor
10a Disk exchange slot
10b Display device
10c Disk exchange opening / closing key
10d play key
10e Stop key
10f rotary tray operation dial
10g numeric keypad

Claims (4)

A disk storage unit in which a plurality of slots for storing disk-shaped recording media are formed one by one; a position detection unit for detecting the position of the slot; a driving unit for driving the disk storage unit; Control means for controlling the drive means to move a designated slot of the plurality of slots to a designated slot stop position based on a detection result by the means,
Timing detection means for detecting a passage timing when the slot passes a predetermined reference position,
Determining means for determining the presence or absence of a slot passing through the reference position within a predetermined reference time based on a detection result by the timing detection means,
The control means controls the driving means so as to increase the driving force of the driving means by a predetermined amount when the determining means determines that there is no slot passing through the reference position within the reference time. Disc changer device. 2. The disc changer device according to claim 1, wherein the control unit controls the driving unit by dividing a driving force of the driving unit into a plurality of driving force levels. A storage unit for storing a current driving force level among the plurality of driving force levels,
The control unit controls the driving unit to increase or decrease the driving force of the driving unit to a driving force level different from the current driving force level stored by the storage unit by one step. 3. The disc changer device according to 2. The control means, when the designated slot reaches a predetermined vicinity of the designated slot stop position, based on a detection result by the position detection means, sends out the slots one by one to the designated slot stop position. 4. The disc changer according to claim 1, wherein the drive unit is controlled to drive the disc storage unit so that the designated slot reaches the designated slot stop position. 5. apparatus.

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