JP2008146778A - Disk tray control apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk tray control apparatus capable of issuing a warning after a lapse of a predetermined time period when a tray is left open without a disk thereon, cutting power off automatically, and starting a reproduction automatically. <P>SOLUTION: The disk tray control apparatus includes a control means 15 to which each detection signal of a tray detection means 6 and a disk detection means 7 is led. When a tray 3 is in a drawn-out position and a detection signal indicating that no disk is placed on the tray 3 is received, the control means 15 rotates a loading motor 5 forwardly and reversely at a short time period for a predetermined time period via a motor control section 10 after a lapse of a predetermined time and then controls a power supply circuit 14 so that it shuts off the voltage supply to a load side. When the tray 3 is in a drawn-out position and a detection signal indicating that a disk is placed on the tray 3 is received, the control means 15 controls an information reproduction means 9 so that it starts a reproduction operation after a lapse of a predetermined time period. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disk apparatus for recording / reproducing an optical disk such as a DVD, and more particularly to a disk tray control apparatus that can prevent a tray on which an optical disk is loaded and unloaded from being left unattended.

  A disc recorder or the like that records information on an optical disc and reproduces recorded information usually has a tray provided on the front panel, and the tray transport mechanism is used to place the disc between a drawing position (open) and a drawing position (close). Is supposed to move.

When this tray is left in an open state, a failure such as a damage or a failure occurs, so various preventive measures have been proposed.
As an example, a disk recorder that automatically stores a tray has been proposed.
This disk recorder is configured to include storage means for detecting the tray withdrawal operation and automatically storing the tray within a set time.
Therefore, even if the tray is left in the exit position, it can be safely used because it is stored before being deformed.
Japanese Utility Model Laid-Open No. 3-61655 is also known, and a loading device is also known for the purpose of preventing the tray from being damaged. This loading device has a distance measuring sensor attached to the front surface of the tray. An alarm generating unit that operates according to the output of the distance measuring sensor and a speaker that emits an alarm sound when the alarm generating unit is driven are provided. According to this loading device, since the tray is stopped or returned to the original position before the tray collides with an obstacle, the tray is prevented from being unnecessarily damaged, and it is also possible to prevent the loading motor from being loaded. It has the effect of not shortening the life of the motor. Further, a loading / unloading method of an information reproducing apparatus for closing an open tray after a predetermined time is also known. This is provided with a sensor for detecting that a disc is placed on the tray. When the disc is placed when the tray is opened or when a predetermined time has elapsed, the tray is stored in the main body.

This prevents the tray from being kept open so that damage is prevented.
JP-A-63-222368

By the way, the inventions of the above-mentioned patent documents 1 to 3 can prevent damage to the tray because the tray is automatically closed and stored in the main body when the tray is open. The operation according to whether it is mounted or not cannot be performed.
For this reason, when a disc is placed on the tray, it has been impossible to automatically start reproduction after a predetermined time has elapsed or to automatically turn off the power after a predetermined time.
The present invention has been made in view of the above problems. When a disc is not placed on a tray and left in an open state, a warning is issued after a predetermined time, power supply power is automatically shut off, or automatic An object of the present invention is to provide a disc tray control device capable of starting reproduction.

In order to achieve the above object, the present invention provides an information reproducing means for reproducing recorded information on a disc, and a tray on which the disc is placed is pulled out from the apparatus main body by a loading motor capable of forward and reverse rotation, and is drawn into the apparatus main body. A tray conveying means, a tray detecting means for detecting a movement from the pull-out position of the tray to the pull-in position and outputting a detection signal, and detecting whether or not the disc is placed at the pull-out position of the tray. Disc detection means for outputting a detection signal, a motor control unit for controlling the rotation of the loading motor, detection signals of the tray detection means and the disc detection means are guided, and the tray is in the drawer position. When receiving a detection signal indicating that a disk is not placed, the motor control is performed after a predetermined time has elapsed. After the loading motor is rotated forward and backward for a predetermined time in a short period, the voltage supply to the load side is interrupted to the power supply circuit, while the tray is in the pull-out position, and the disc is placed on the tray. And a control means for controlling the information reproducing means to start a reproducing operation after a predetermined time has elapsed when a detection signal indicating that the information has been received is received.
Also, an information reproducing means for reproducing recorded information on the disc, a tray on which the disc is placed are pulled out from the apparatus main body by a loading motor capable of rotating in the forward and reverse directions, while a tray conveying means for pulling into the apparatus main body, Tray detection means for detecting movement from the pull-out position to the pull-in position and outputting a detection signal; and disk detection means for detecting whether or not the disk is placed at the pull-out position of the tray and outputting a detection signal And whether the detection signal of the motor control unit for controlling the rotation of the loading motor, the tray detection means and the disk detection means is guided, the tray is in the pull-out position, and the disk is placed on the tray. The rotation of the loading motor is controlled in accordance with a detection signal indicating whether the voltage of the power supply circuit is supplied. The on and off control, further, it is characterized in that it comprises a control means for controlling the reproducing operation of the information reproducing means.
In addition, when the control means receives a disk detection signal indicating that no disk is placed on the tray, after the predetermined time elapses, the loading motor is forwarded to the motor control circuit for a predetermined time in a short cycle. It is characterized by sending a command signal for rotation.
Further, when the control means receives a disk detection signal indicating that no disk is placed on the tray, a power-off command signal for cutting off the voltage supply to the load side to the power supply circuit after a predetermined time has elapsed. Is transmitted.
Further, when the control means receives a disk detection signal indicating that a disk is placed on the tray, the control means sends a reproduction start command signal to the reproduction means after a predetermined time has elapsed.
In addition, a time setting unit for arbitrarily setting each predetermined time is provided.

As described above, according to the present invention, when the tray is in the drawer position and no disc is placed on the tray, the loading motor rotates forward and backward for a predetermined time in a short cycle, so that the vibration sound is emitted to the surroundings. As a result, the user can be aware that the tray is open.

Further, when the tray is in the open state, the power supply circuit is blocked from supplying the voltage to the load side, so that wasteful power consumption can be suppressed.
Furthermore, when a disc is placed on the tray, the information reproducing means starts the reproducing operation after a predetermined time has elapsed, so that the information on the disc is automatically reproduced without waiting for the user's reproduction operation, and the user is made aware. In addition, the tray can be prevented from being damaged.
In addition, the rotation of the loading motor is controlled and the voltage supply of the power supply circuit is turned on / off in response to a detection signal indicating whether or not the tray is in the drawer position and the disc is placed on the tray. Since the playback operation of the information playback means is controlled, the loading motor is rotated forward and backward for a predetermined time in a short period, thereby emitting vibration sound to the surroundings and notifying the user that the tray is in the open state. be able to.
Similarly, when the tray is in the open state, the voltage supply from the power supply circuit is cut off, so that useless power consumption can be suppressed.
Similarly, when the tray is in the open state, the information reproducing means starts the reproducing operation, so that there is an advantage that the information on the disc can be automatically reproduced without waiting for the user's reproducing operation.
Further, when the control means receives a disk detection signal indicating that no disk is placed on the tray, a command signal for rotating the loading motor forward and backward for a predetermined time in a short period to the motor control circuit after a predetermined time has elapsed. Therefore, it is possible to let the user notice that the tray is in an open state by emitting a vibration sound to the surroundings.
Also, when the control means receives a disk detection signal indicating that no disk is placed on the tray, it sends a power-off command signal that shuts off the supply of voltage to the power supply circuit after a predetermined time has elapsed. Therefore, useless power consumption can be suppressed.
In addition, when the control means receives a disk detection signal indicating that a disk is placed on the tray, it sends a reproduction start command signal to the reproduction means after a predetermined time has elapsed, so the user has waited for a reproduction operation. Disc information can be automatically played back.
In addition, since it includes a time setting unit for arbitrarily setting each predetermined time, when the tray is in an open state, a time for emitting a vibration sound and a time for cutting off the voltage supply from the power supply circuit to the load side There is an advantage that the time for automatically reproducing the disc information can be set to an optimum value.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a disk tray control device according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory diagram showing a schematic configuration of a disk tray control device according to an embodiment of the present invention.
This disc tray control device is applied to a disc recorder, and a mechanical unit such as a tray 3 and a tray transport mechanism 4, an information recording / reproducing unit 9, a control unit 15 and other circuit units are housed in a mounting main body 1.
The front panel 2 of the mounting body 1 is provided with an entrance 2a for the tray 3. A disk detection sensor 7, an operation unit, a display unit 12, an indicator lamp 13, and the like are also provided.
The tray 3 has a rectangular plate shape, and has a recess on the upper surface 3b where different types of disks can be placed. In addition, a reading hole for reading information as well as writing information on the disk by a pickup is formed at the approximate center.
Further, a disc detection hole 3a for detecting whether or not a disc is placed on the tray 3 is formed in the vicinity of the reading hole.
The tray transport mechanism 4 includes a loading motor 5 and a gear mechanism, and the output from the motor control unit 10 is guided.
The motor control unit 10 controls the drawing motor 5 to be drawn into the apparatus main body 1 while rotating the loading motor 5 forward and backward in accordance with an instruction from the control unit 15 to draw out the tray 3 from the apparatus main body 1.
Further, by rotating the loading motor 5 forward and backward in a short cycle, a slight vibration is caused to generate a warning sound.
6 is a tray detection sensor, for example, an infrared light sensor is used. The tray detection sensor 6 is provided at an upper portion on the rear end 3c side of the tray 3 and directs the light emitting portion toward the tray 3 side.
The tray detection sensor 6 provides an output signal to the control unit 15, and outputs an open detection signal when the tray 3 is at the pull-out position, and outputs a close detection signal when the tray 3 is at the pull-in position.
Reference numeral 7 denotes a disk detection sensor, which includes a light emitter 7a and a light receiver 7b. The light emitter 7a is provided on the upper side of the entrance 2a of the front panel 2, and the light receiver 7b is attached to the lower side facing the light emitter 7a.
The disc detection sensor 7 provides an output signal to the control unit 15, and when the light beam from the light emitter 7a is received by the light receiver 7b through the disc detection hole 3a when the tray 3 is in the drawer position, A disc absence detection signal indicating that no disc is placed on the tray 3 is output.
On the other hand, when the light beam from the light emitter 7a is shielded by the mounting disk and is not received by the light receiver 7b, a detection signal with a disk indicating that the disk is mounted on the tray 3 is output.
A buzzer 8 is attached to the inner side surface 1 a of the mounting body 1. An output from the control unit 15 is guided to the buzzer 8, and an alarm sound is generated when an ON command is issued.
An information recording / reproducing unit 9 records information on the disc by an optical pickup in accordance with a command from the control unit 15 and reproduces the recorded information.
Reference numeral 11 denotes a time setting key, which is provided in an operation unit provided on the front panel 2. Although not shown, this operation unit has various operation keys, and an output is connected to the control unit 15 so that a signal corresponding to the key operation is transmitted.
The time setting key 11 can arbitrarily set the time until the alarm sound or vibration sound is generated when the tray 3 is in the drawer position, and the alarm sound or vibration generation time in minutes. ing.
The front panel 2 is provided with an open / close key for opening or closing the tray 3 and a power switch for turning on / off the power.
Reference numeral 12 denotes a liquid crystal display unit mounted in the vicinity of the operation unit, and displays the operation content of the operation unit in accordance with a display command from the control unit 15.
Reference numeral 14 denotes a power supply circuit, which performs AC / DC conversion on commercial AC power and supplies it to each load circuit with a required voltage. An output from the control unit 15 is guided to the power supply circuit 14, and a voltage is supplied to each load circuit in response to a power on / off command, and the supply is cut off.
The power supply circuit 14 is connected to a power indicator lamp 13 composed of red and green LEDs. When a power supply power-on command is issued from the control unit 15, the green LED is turned on, while the power supply power-off is turned on. Lights red when commanded.
The control unit 15 is a microcomputer that controls the entire apparatus, and includes a memory, a timer, a counter, and the like, and is connected to each part of the circuit in one direction or bidirectionally depending on the function.
Then, in accordance with an operation of a remote controller (not shown), information is recorded on the disc, and operation control for reproducing the recorded information is performed.
Also, detection signals from the tray detection sensor 6 and the disk detection sensor 7 are checked, and a warning is issued depending on whether or not the tray 3 is in the drawer position and whether or not a disk is placed on the tray 3. In addition, the power source power is cut off after a lapse of a predetermined time, or the reproduction is automatically started.
Next, the operation of the disk tray control device will be described with reference to the drawings.
Here, a case where the user leaves the place after performing an operation for starting use will be described.
When the control unit 15 starts operating due to power-on, it is checked whether or not the tray opening / closing key has been pressed (step S11).
Here, when the user presses the tray opening / closing key, the loading motor 5 of the tray transport mechanism 4 rotates, and the tray 3 is pulled out and moved to the open position (step S12).
Next, the control part 15 discriminate | determines whether the preset time passed by the timer and the counter (step S13).
If the user does not perform the next operation after pressing the tray open / close key, the tray 3 is kept open.
When a predetermined time elapses in this state, the control unit 15 operates the buzzer 8 to emit a warning sound (step S14).
Further, the control unit 10 is controlled to rotate the loading motor 5 forward and backward in a short period, thereby generating a vibration sound (step S15).
Thereby, since the buzzer sound and the vibration sound are emitted to the surroundings for a preset time, it is possible to make the user aware that the tray 3 is in the open state.
Subsequently, the control unit 15 determines whether or not a preset time has elapsed (step S16).
Further, the detection signal from the disk detection sensor 7 is checked, and it is checked whether or not the disk is placed on the tray 3 at the pulling position (step S17).
Here, when the disc is not placed on the tray 3, the tray transport mechanism 4 is controlled to move the tray 3 to the retracted position and close it.
Further, an off command is sent to the power supply circuit 14 to cut off the voltage supply to the load circuit (step S18). Therefore, the use of power is reduced only by changing the indicator light from red to green.
On the other hand, when a disc is placed on the tray 3, a command signal is output to the information recording / reproducing unit 9 to start reproduction (step S19).
As a result, the playback sound is automatically emitted, so that the user can be aware that the disc has been set.
Thereafter, the control unit 15 checks whether or not the reproduction is finished (step S20), and finishes a series of operations at the time when the reproduction is finished.
In the above-described embodiment, the case where the buzzer 8 is operated simultaneously has been described. However, the loading motor 5 may be configured to simply rotate forward and reverse in a short time.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is a block diagram which shows the electric constitution of the disk tray control apparatus which concerns on one Embodiment of this invention. It is a flowchart for demonstrating operation | movement of the disc tray control apparatus.

Explanation of symbols

3 tray 5 loading motor 6 tray detection means 9 information reproduction means 10 motor control unit 14 power supply circuit 15 control means

Claims (6)

Information reproducing means for reproducing recorded information on the disc;
A tray carrying means for pulling out the tray on which the disk is placed from the apparatus main body by a loading motor capable of forward and reverse rotation,
Tray detection means for detecting a movement from the tray drawing position to the drawing position and outputting a detection signal;
Disc detecting means for detecting whether or not the disc is placed at the tray drawing position and outputting a detection signal;
A motor controller for controlling the rotation of the loading motor;
When each detection signal of the tray detection means and the disk detection means is guided, and when the detection signal indicating that the tray is in the pull-out position and the disk is not placed on the tray is received, the predetermined time elapses. After the loading motor is rotated forward and reverse for a predetermined time in a short period through the motor control unit, the power supply circuit is cut off from the voltage supply to the load side, while the tray is in the pull-out position, And a control means for controlling the information reproducing means to start a reproducing operation after a predetermined time has elapsed when a detection signal indicating that the recording medium is placed is received. Information reproducing means for reproducing recorded information on the disc;
A tray carrying means for pulling out the tray on which the disk is placed from the apparatus main body by a loading motor capable of forward and reverse rotation,
Tray detection means for detecting a movement from the tray drawing position to the drawing position and outputting a detection signal;
Disc detecting means for detecting whether or not the disc is placed at the tray drawing position and outputting a detection signal;
A motor controller for controlling the rotation of the loading motor;
The detection signals of the tray detection means and the disk detection means are guided, and the loading motor is rotated in response to a detection signal indicating whether or not the tray is in the drawer position and a disk is placed on the tray. And a control means for controlling the on / off control of the voltage supply of the power supply circuit and for controlling the reproducing operation of the information reproducing means. When the control means receives a disc detection signal indicating that no disc is placed on the tray, the motor control circuit rotates the loading motor forward and backward for a predetermined time in a short period after a predetermined time has elapsed. 3. The disk tray control apparatus according to claim 2, wherein a command signal is transmitted. When the control means receives a disk detection signal indicating that a disk is not placed on the tray, it sends a power-off command signal that shuts off the voltage supply to the load circuit after a predetermined time has elapsed. 4. The disc tray control device according to claim 2, wherein the disc tray control device is a disc tray control device. 3. The control unit according to claim 2, wherein when the control unit receives a disc detection signal indicating that a disc is placed on the tray, the control unit sends a playback start command signal to the playback unit after a predetermined time has elapsed. The disc tray control device described. 6. The disk tray control device according to claim 3, further comprising a time setting unit that arbitrarily sets the predetermined times.