JP2000030335A - Tray ejecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the taking out of a tray from becoming unprocessable. SOLUTION: The device is provided with the tray 11 housed in a casing and taken out by the restoring force of an elastic body 19, a lock lever 16 locking the tray 11 to the casing for housing, a cam 15 for making the lock lever 16 release the lock by rotating while sliding in contact with the lock lever 16, a motor 13 for rotating the cam 15 at the time of the taking out process of the tray 11, a normal processing time measuring means 21 for measuring the time from the start to drive the motor 13, a detection means 18 for detecting the released state of the lock in accordance with the position of the lock lever 16, and a control means 12 for stopping the motor 13 when the release of lock is detected by the detection means 18 and also for increasing the driving force of the motor 13 when the release of lock is not detected by the detection means 18 till a specified time is measured by the normal processing time measuring means 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray ejecting apparatus suitable for use as a disc mounting tray for a disc drive mounted on, for example, a personal computer.

[0002]

2. Description of the Related Art In recent years, personal computer devices have
Various types of disk drives equipped with a disk drive for reading information from an information storage medium such as a CD-ROM have been put to practical use. In this disk drive, a tray on which a CD-ROM or the like is mounted is designed so that the tray is pulled out toward the front or side from a desired place where the disk drive is mounted.

Conventionally, as one of such mechanisms for ejecting a tray in a disk drive, for example, there is one shown in FIG. The mechanism shown in FIG. 5 is a mechanism that is employed when a disk drive or the like is mounted on a small device such as a notebook personal computer device. The configuration will be described below. A tray 51 on which a disk is mounted and mounted on a housing such as a disk drive is described.
A microcomputer (hereinafter, referred to as a microcomputer) 52 for controlling the entire apparatus, a motor 53 for driving a rotating shaft 53a to rotate, and a motor driving circuit 54 for applying a driving voltage to the motor 53 under the control of the microcomputer 52. Provided. A worm 53b is attached to one end of a rotation shaft 53a of the motor 53.

A worm wheel 55a is arranged corresponding to the worm 53b, and the worm wheel 55a rotates in conjunction with the rotation of the worm 53b. The worm wheel 55a includes a cam 55 having a projection 55b.
Are attached together. The cam 55 comes into sliding contact with one end of a lock lever 56 that swings about a fulcrum 56a. The other end of the lock lever 56 has a hook 56b having a hook shape.
6, the cam 55 and the lock lever 56 are always in sliding contact with each other by the elastic force of a lock spring 57 attached to a predetermined location of the tray 6 and the other end thereof is attached to a predetermined position of the tray 51. Further, a cam position detection switch 58 for detecting the swinging state of the lock lever 56 is attached to the tray 51, and is disposed at a position where the switch lever 58a is pressed when the lock described below is released. The tray 51 has one end of a take-out spring 59 attached thereto. The other end of the take-out spring 59 is attached to a predetermined position of a portion of the disk drive where the tray 51 is stored. In a state in which the tray 51 is not moved, the tray 51 is opened in the direction of arrow a by the elastic force of the spring 59 (ejected state).

When the tray 51 is stored, a hook 56b of a lock lever 56 is hooked on a stopper 60 provided inside the disk drive.

[0006] In addition, this mechanism is provided in order to abort the removal of the tray 51 and to forcibly terminate the processing when the processing of removing the tray 51 is not completed within the time required for the processing of normally removing the tray 51. A timer 61 that measures time from the start of processing is provided. The timer 61 measures the time from the start of the process of taking out the stored tray 51 under the control of the microcomputer 52, and when the specified time has elapsed, the time is applied to the motor 53 by the motor drive circuit 54. The microcomputer 52 outputs to the microcomputer 52 a signal prompting the user to stop supplying the supplied voltage.

Next, the operation of taking out the stored tray 51 will be described with reference to FIG. Tray 5
When the tray 1 is stored, the process is started when an instruction to remove the tray 51 is given by a user operation or the like. First, in step S601, the time required for the removal process of the tray 51 is measured. Start. Microcomputer 5
2 outputs a signal urging the start of time measurement to the timer 61, and the timer 21 receiving this signal starts time measurement of a specified time. In this case, the predetermined time set in the timer 21 is set to be slightly longer than the time required for the normal tray 51 removal processing.

When the time measurement by the timer 61 is started,
In step S602, a predetermined signal is output from the microcomputer 52 to the motor drive circuit 54, and the motor drive circuit 54
As a result, a predetermined fixed voltage is applied, so that the motor 53 rotates.

When a predetermined signal for urging the motor drive circuit 54 to apply a fixed voltage is output, in step S603, it is determined whether or not a considerable time has elapsed since the start of the process of taking out the tray 51 by a timer. This is performed based on whether or not a predetermined time measured by 61 has elapsed. If the predetermined time has not yet elapsed, the cam 55 moves the hook 56b of the lock lever 56 to the stopper 6 in step S604.
The determination as to whether or not the rotation has been released from 0 is performed based on whether or not the push end recognition signal has been output from the cam position detection switch 58. If the push end recognition signal has not been output yet, Returning again to step S603, it is determined whether a signal output from the timer 61 indicating the elapse of the predetermined time has been received. That is, when the microcomputer 52 outputs a signal for urging the motor drive circuit 54 to drive the motor in step S602, the signal indicating the elapse of a predetermined time from the timer 61 or the cam position detection switch 58 is output in steps S603 and S604. Is in a state of waiting for the input of either one of the push end recognition signals.

Here, step S603 and step S603
The operation of each member constituting this mechanism in a signal input waiting state at 604 will be described below. In step S602, when the microcomputer 52 receives a signal urging the motor 53 to be driven from the microcomputer 52 and applies a fixed voltage to the motor 53 from the motor drive circuit 54, the motor 53 is driven and the rotating shaft 53a of the motor 53 rotates. Let me do. When the rotation shaft 53a rotates, the cam 55 attached to the worm wheel 55a is rotated in accordance with the rotation of the worm 53b. When the projection 55b comes into contact with the sliding contact portion 56c of the lock lever 56 by the rotation of the cam 55, one end of the lock lever 56 is lifted, and the hook 56b side is moved from the fulcrum 56a to the locking spring 57 corresponding to this. And the hook 56b is removed from the stopper 60. When the hook 56b is released, the switch lever 58a of the cam position detection switch 58 is pressed by a predetermined portion of the other end of the lock lever 56,
When the hook 56b is completely disengaged, the tray 51 is pushed out in the direction indicated by the arrow a and is taken out by the restoring force of the take-out spring 59 that has been contracted.

When the hook 56b of the lock lever 56 is released and the tray 51 is taken out, the cam 55 is further rotated from the position where the slide lever 56c of the lock lever 56 is lifted. Since the lock lever 56 has been rotated to the normal position where it comes into contact without lifting the side, the lock lever 56 is in the state where the tray 51 is held by the attraction of the lock spring 57, and the pressing of the cam position detection switch 58 is completed. .

The cam position detection switch 58 is rotated to a predetermined position at which the cam 55 is released from the stopper 60 when the cam position detection switch 58 is depressed after the lock lever 56 is depressed. And detects that the cam 55 has rotated to the position where the removal of the tray 51 has been completed, and outputs a pressing completion recognition signal to the microcomputer 52.

The microcomputer 52 includes a lock lever 5
6 is removed from the stopper 60, and when the push-down end recognition signal from the cam position detection switch 58 is received, step S6
At 05, the motor driving circuit 54 is instructed to stop the motor 53, the application of the fixed voltage is stopped by the motor driving circuit 54, and the motor 53 is stopped.

[0014] That is, as shown in B of FIG. 7, at time t _a which eject process is started in the tray 51 due to an instruction from the user, applying a predetermined fixed voltage V _a by the motor driving circuit 54 is started, at time t _b of the depression after she was depressed cam position detecting switch 58 by the lock lever 56 that has been completed is detected from the output of the switch 58, as shown in a of FIG. 7, the motor driving circuit 54 is applied The supply of the predetermined fixed voltage _Vb is stopped, and the process of removing the tray 51 ends.

Steps S603 and S6
At 04, when a predetermined time has elapsed while the system is waiting for input of either a signal indicating the elapse of the predetermined time from the timer 61 or a signal indicating that the press position has been recognized from the cam position detection switch 58, If the signal output from the timer 61 is received first, in step S605, the drive of the motor 53 is stopped under the control of the microcomputer 52, the taking out of the tray 51 is abandoned, and the process is forcibly terminated. You.

[0016] That is, as shown in B of FIG. 8, at time t _a which eject process is started in the tray 51 due to an instruction from the user, applying a predetermined fixed voltage V _a by the motor driving circuit 54 is started, After the pressing of the cam position detection switch 58 by the lock lever 56, the timer 61 measures without the pressing end recognition signal indicating that the pressing is ended is not output from the cam position detection switch 58 as shown in FIG. 8A. at time t _c of the predetermined time T _a which has elapsed, a given supply of fixed voltage V _a of the motor drive circuit 54 has been applied is forcibly stopped, the process gives up the removal of the tray 51 Will be terminated.

With this configuration, the tray 51 stored in the disk drive can be taken out, and if the processing is not completed within a predetermined time, it can be forcibly terminated. And the tray 5 taken out
When the user presses the tray 51 in the direction opposite to the direction in which the user 1 is manually pulled out (the direction of the arrow a), the hook 56b of the lock lever 56 is hooked on the stopper 60, and the user is stored. Locked to.

[0018]

By the way, in the above-described motor control process, when the tray 51 is taken out, the members constituting the above-described mechanism are driven by the rotating force necessary for the desired operation. The applied voltage from the motor drive circuit 54 is set so that the motor 53 is driven. However, there are no problems such as a case where the resistance for rotating the rotation shaft 53a of the motor 53 itself and the sliding contact resistance of each member are increased. If the load on the motor 53 for taking out the tray 51 has increased due to the above reasons, the processing will not be completed within the time set in the timer 61, and the user There is a problem that the tray 51 cannot be taken out unless an instruction to take out the tray 51 is given by an operation or the like.

Further, when the load on the motor 53 for taking out the tray 51 has increased, even if the set applied voltage is supplied to the motor 53, the rotating shaft 53a of the motor 53 Does not rotate,
There has been a problem that the ejection mechanism itself is locked and the tray 51 cannot be ejected.

Although the problem of the eject mechanism of the tray mounted on the notebook type personal computer has been described here, other electronic devices for controlling the motor used for taking out the tray on which the disk or the like is mounted are also described.
There is a similar problem in the case where the tray is removed as described above.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to prevent a tray from being removed in this type of apparatus.

[0022]

SUMMARY OF THE INVENTION To solve this problem, the present invention relates to a tray housed in a predetermined housing and taken out by the restoring force of an elastic body, and a lock lever for locking the tray in the housing for housing. A cam that releases the lock to the lock lever by rotating while sliding on the lock lever, a motor that rotates the cam when the tray is removed, and a normal process that measures the time since the start of driving the motor. Time measuring means, detecting means for detecting that the lock is released based on the position of the lock lever, and stopping the motor when the detecting means detects unlocking,
And control means for increasing the driving force of the motor when the detecting means does not detect the unlocking until the normal processing time measuring means measures the predetermined time.

According to the structure of the present invention, it is possible to perform control for increasing the driving force of the motor when the lock release is not detected within a predetermined time. Can be taken out of the tray.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

Here, a mechanism for ejecting the tray of the present embodiment (hereinafter, referred to as a tray eject mechanism) is, for example, a CD mounted on a notebook personal computer.
An example will be described in which the present invention is applied to a process for taking out a tray for mounting a CD-ROM or the like in a disk drive for reading stored information such as a ROM. A disk drive using the tray eject mechanism of the present embodiment is provided at a desired place of the personal computer 1, for example, at the front of a keyboard portion, as shown in FIG. 2, for example, and the tray 11 is pulled out and taken out, for example. It is supposed to be. The installation location of the disk drive using the tray eject mechanism of this embodiment is not limited to the position shown in FIG. 2, but may be various installation locations such as the side of a keyboard portion. In this case, the tray is pulled out sideways. Taken out.

FIG. 1 is a diagram showing the configuration of the tray eject mechanism of this embodiment. FIG. 1 shows a state where the tray 11 is stored in, for example, a disk drive (not shown). In addition, most of the members constituting the tray eject mechanism of the present embodiment are provided at desired locations such as inside the tray 11 forming a housing. For example, a personal computer 1 having the tray eject mechanism of the present embodiment is provided. The members other than the tray 11 are invisible to the user from outside.

The configuration of the tray eject mechanism of this embodiment will be described below. For example, a tray 11 in which a CD-ROM or the like is placed at a predetermined position and stored and mounted in a housing such as a predetermined disk drive, and the like. A microcomputer (hereinafter referred to as a microcomputer) 12 for controlling the entire mechanism such as a take-out process, a motor 13 for rotating and driving a rotating shaft 13a, and a predetermined two-stage fixed voltage in this embodiment are applied under the control of the microcomputer 12. Motor 1 so that the rotating shaft 13a rotates with two stages of rotational force (rotational speed).
3 for driving the motor 3. A worm 13b is attached to one end of a rotation shaft 13a of the motor 13.

In this embodiment, a worm wheel 15a is arranged corresponding to the worm 13b.
The worm wheel 15a rotates in conjunction with the rotation of b. The worm wheel 15a is integrally provided with a cam 15 having a projection 15b. This cam 15 is in sliding contact with one end of a lock lever 16 that swings about a fulcrum 16a. The other end of the lock lever 16 has a hook 16b having a predetermined hook shape, a lock spring 17 having one end attached to a predetermined position of the lock lever 16 and the other end attached to a predetermined position of the tray 11. The cam 15 and the lock lever 16 are always in sliding contact with each other by the elastic force of the above. Further, in this example, a cam position detection switch 18 for detecting the swinging state of the lock lever 16 is attached to the tray 11, and when the lock lever 16 is at a position for releasing a lock described later, the switch lever 18a is pressed. It is located at the position.

In this embodiment, when a predetermined time limit has elapsed since the start of the tray 11 removal process, the tray 11 removal process is started by, for example, a user operation in order to shift to the lock escape process described later. A timer 21 is provided for measuring the passage of time from the time when the operation is performed. In this example, in order to forcibly end the process when a predetermined time limit has elapsed since the start of the lock escape process described later, the timer 21 starts the lock escape process described later. It is also possible to measure the passage of time. In this case, each time limit set in the timer 21 is set in advance in this example. For example, the time limit after the start of the tray 11 take-out process is, for example, required for the normal tray 11 take-out process. Try to set the time slightly longer than the time. Each of the timers 21 outputs a predetermined signal to the microcomputer 12 when a predetermined time limit has elapsed.

Here, a take-out spring 19, which is an elastic body for taking out the tray 11 from, for example, a housing in which the tray 11 is stored, is provided between the housing and the tray 11 in which the tray 11 is stored. It is provided in the place. In this example, one end of the take-out spring 19 is attached to the tray 11, and the other end is attached to a predetermined position of, for example, a housing for storing the tray 11. The state in which the tray 11 is opened in the direction of arrow a by the elastic force of the spring 19 (eject state)
become. Various shapes of the cam 15 can be considered. For example, the hook 16b of the lock lever 16 is in sliding contact with the sliding portion 16c while being hooked on the stopper 20. In this example, the distance from the cam shaft is relatively short. In this case, the distance from the camshaft is relatively large, in which the circular portion and the sliding portion 16c of the lock lever 16 are slid in contact with the sliding portion 16c of the lock lever 16 so that the hook 16b of the lock lever 16 is displaced from the stopper 20. In this long example, the projection 15
If it has b, it may have any shape.

The state of each component constituting the tray eject mechanism of this embodiment when the tray 11 is stored will be described. ,
In this embodiment, the hook 16b of the lock lever 16 is hooked, and in this example, the portion other than the projection 15b of the cam 15 is positioned in contact with the sliding contact portion 16c of the lock lever 16 so as to maintain this state. ing. When the tray 11 is stored, the lock lever 16 is prevented from coming off the stopper 20 by the elastic force of the lock spring 17. Further, in a state where the tray 11 is stored, the hook 16b of the lock lever 16 is hooked on the stopper 20, so that in this example, the take-out spring 19 is in a contracted state.

Next, the operation of the tray eject mechanism of this embodiment when taking out the tray 11 will be described with reference to FIG. With the tray 11 stored, the tray 11
When the user instructs to take out the tray 11, for example, when the user presses, for example, a take-out button provided in a disk drive that houses the tray 11, the take-out process of the tray 11 is started. When this process is started, in this example, first, in step S301, measurement of the time required for taking out the tray 11 (hereinafter, referred to as first time measurement) is started. In this example, the microcomputer 12 outputs to the timer 21 a signal urging the start of the first time measurement,
The timer 21 receiving this signal starts measuring the first time and monitors the elapse of a preset predetermined time. In this case, the time set in the timer 21 is
A time slightly longer than the time required for the normal tray 11 removal processing is set.

When a predetermined signal is output to the timer 21 to prompt the start of the first time measurement, the driving of the motor 13 is started in step S302 in this example. In the process of driving the motor 13, in this example, the microcomputer 12 outputs a signal that prompts the motor drive circuit 14 to drive the motor, and the motor drive circuit 14 that has received this signal can apply two steps in this example. , A fixed voltage having a low voltage value (hereinafter, referred to as a first fixed voltage) is applied to the motor 13. In this example, the first fixed voltage is a desired voltage value used for a normal tray ejection process. When the first fixed voltage is applied, the motor 13 is driven,
The rotation shaft 13a of the motor 13 rotates.

When a predetermined signal is output to urge the motor drive circuit 14 to apply the first fixed voltage, in this example, in step S303, it is determined whether or not a considerable time has elapsed from the start of the tray 11 removal process. Is determined. In this example, this determination is made based on whether the time measured by the first time measurement of the timer 21 has passed a predetermined time,
If the predetermined time has not yet elapsed, step S3
At 04, it is determined whether or not the cam 15 has rotated to a position at which the operation of releasing the hook 16b of the lock lever 16 from the stopper 20 is started. In this example, this determination is made based on whether or not a push start detection signal has been output from the cam position detection switch 18. If the push start detection signal has not been output yet, the process returns to step S303 and the timer 2
It is determined whether or not there has been a signal output indicating the elapse of a predetermined time from 1. That is, in this example, when the microcomputer 12 outputs a signal prompting the motor drive circuit 14 to drive the motor in step S302, the microcomputer 12 proceeds to step S30.
At step 3 and step S304, the control waits for the input of either the signal indicating the elapse of the predetermined time from the timer 21 or the pressing start detection signal from the cam position detection switch 18.

Here, step S303 and step S303
The operation of each member constituting the tray eject mechanism of the present example in the signal input waiting state at 304 will be described below. When the motor drive circuit 14 receives the signal prompting the drive of the motor 13 from the microcomputer 12 in step S302 and applies the first fixed voltage to the motor 13, the motor 13 is driven and the rotating shaft 13a of the motor 13 is driven. Will rotate. When the rotating shaft 13a rotates,
The cam 15 attached to the worm wheel 15a rotates in accordance with the rotation of the worm 13b formed at one end of the rotating shaft 13a. In the present embodiment, when the projection 15b comes into contact with the sliding portion 16c of the lock lever 16 by the rotation of the cam 15, one end of the lock lever 16 is lifted, and the fulcrum of the lock lever 16 is correspondingly moved. The hook 16b is lowered downward from 16a against the elastic force of the locking spring 17.

In this embodiment, when the portion on the hook 16b side from the fulcrum 16a of the lock lever 16 is lowered by a predetermined angle, when the operation of the lock lever 16 to come off from the stopper 20 is started, the predetermined portion of the lock lever 16 is The switch lever 18a of the cam position detection switch 18 is pressed. The cam position detection switch 18 outputs a depression start detection signal to the microcomputer 12 when the depression of the switch lever 18a by a predetermined portion of the lock lever 16 starts.

In the signal input waiting state in steps S303 and S304, the cam position detection is performed before receiving the signal indicating that the predetermined time limit has elapsed from the timer 21 by the first time measurement. When the microcomputer 12 receives the pressing start detection signal from the switch 18, in this example, it is determined in step S <b> 305 whether or not a considerable time has elapsed since the start of the removal processing of the tray 11.
In this example, this determination is made based on whether or not the time measured by the first time measurement of the timer 21 has exceeded a predetermined time. If the predetermined time has not yet elapsed, the cam is determined in step S306. 15 is the hook 1 of the lock lever 16
It is determined whether or not 6b has been rotated to the position where it is removed from the stopper 20. In this example, this determination is made based on whether or not the push end detection signal has been output from the cam position detection switch 18. If the push end detection signal has not yet been output, the process returns to step S305 again and the timer 21 outputs It is determined whether or not there is a signal output indicating the elapse of the predetermined time. That is, in the present example, when the microcomputer 12 receives the push start detection signal from the cam position detection switch 18 in the signal input waiting state in steps S303 and S304, the microcomputer 12 proceeds to step S30.
In step 5 and step S306, the control waits for input of either a signal indicating the elapse of the predetermined time from the timer 21 or a signal indicating that the cam position detection switch 18 has been pressed down.

Here, step S305 and step S305
The operation of each member constituting the tray eject mechanism of this example in the signal input waiting state at 306 will be described below. In the signal input waiting state in steps S303 and S304, the pressing of the switch lever 18a by the predetermined portion of the lock lever 16 starts, and the cam position detecting switch 18 outputs the pressing start detection signal to the microcomputer 1
After the output to 2, the lock lever 16 further moves,
The portion on the hook 16b side from the fulcrum 16a of the lock lever 16 is further lowered. When this movement is continued, the hook 16b of the lock lever 16 reaches a position where the hook 16b comes off the stopper 20, and the hook 16b is
Get off. Then, there is no force to balance the elastic force of the take-out spring 19 which is in a contracted state.
And extruded in the direction indicated by. When the tray 11 is pushed out by the restoring force of the take-out spring 19, the switch lever 18a of the cam position detection switch 18
Is released from the switch lever 18a of the cam position detection switch 18 by the elastic force of the locking spring 17, and the pressing is terminated. When the pressing of the switch lever 18a by the predetermined portion of the lock lever 16 ends, the cam position detection switch 18
A push end detection signal is output to the microcomputer 12.

In the signal input waiting state in steps S305 and S306, the cam position detection is performed before receiving the signal indicating that the predetermined time limit has elapsed from the timer 21 by the first time measurement. When the microcomputer 12 receives the pressing end detection signal from the switch 18, a process of stopping the driving of the motor 13 is performed in step S313. In this example, in this example, the microcomputer 12 outputs a predetermined signal to the motor driving circuit 14 to instruct the motor driving circuit 14 to stop the motor 13, and the motor driving circuit 14 receiving the predetermined signal output applies the predetermined signal to the motor 13. The first
Is stopped so that the driving of the motor 13 is stopped. When the driving of the motor 13 is stopped, the tray 11 take-out processing of the present example ends.

If a predetermined time has elapsed without completing the process of taking out the tray 11, that is, in this example, when the microcomputer 12 is in a signal input waiting state in steps S303 and S304, the microcomputer 12 When a signal indicating that a predetermined time limit has elapsed from the first time measurement has been received from the timer 21 without receiving the pressing start detection signal from the cam position detection switch 18, or
When the microcomputer 12 is in the signal input waiting state in steps S305 and S306, the microcomputer 12 does not receive the push end recognition signal from the cam position detection switch 18 and the first time measurement from the timer 21 performs the predetermined restriction. When a signal indicating that the time has elapsed is received, in any case, it is determined that the load on the motor 13 in the tray ejection process of the present example has increased, and in this example, the processing after step S307 is performed. Then, a process for removing the tray 11 from the locked state of the tray eject mechanism of the present embodiment due to an increase in the load on the motor 13 (hereinafter, referred to as a lock exit process) is performed.

In the lock escape processing of this example, first, in step S307, measurement of the time required for the lock escape processing (hereinafter, referred to as second time measurement) is started. In this example, the microcomputer 12 outputs to the timer 21 a signal urging the start of the second time measurement, and the timer 21 receiving the signal starts the second time measurement and the predetermined time elapses. This is done as if it were monitored.

When a predetermined signal is output to the timer 21 to prompt the start of the second time measurement, in this example, a process of increasing the rotational force of the motor 13 is performed in step S308. In this example, the first fixed voltage applied by the motor drive circuit 14 to the motor 13 is controlled by a predetermined control of the microcomputer 12 in this example, and the two-stage voltage that the motor drive circuit 14 can apply in this example is Among them, a fixed voltage having a high voltage value (hereinafter, referred to as a second fixed voltage) is applied to the motor 13. When the motor drive circuit 14 changes the applied voltage to the second fixed voltage, the rotating shaft 13a of the motor 13 is driven with a stronger rotating force than when the first fixed voltage is supplied. Therefore, the rotating shaft 13 that was rotating at a low speed
a rotates at high speed, or the rotation shaft 13a that has not rotated starts to rotate.

When a predetermined signal for urging the motor drive circuit 14 to apply the second fixed voltage is output, in this example, in step S309, whether a predetermined time has elapsed since the start of the lock escape processing is determined. Is determined. In this example, this determination is made based on whether or not the time measured by the second time measurement of the timer 21 has exceeded a predetermined time. If the predetermined time has not yet elapsed, the cam is determined in step S310. It is determined whether or not 15 has rotated to a position where the operation of releasing the hook 16b of the lock lever 16 from the stopper 20 is started. In this example, this determination is made based on whether or not a push start detection signal has been output from the cam position detection switch 18. If the push start detection signal has not been output yet, the process returns to step S309 and the timer 21 returns It is determined whether or not there is a signal output indicating the elapse of the predetermined time. That is, in this example, when the microcomputer 12 outputs a signal prompting the motor drive circuit 14 to drive the motor in step S308, the microcomputer 12 outputs a signal indicating that a predetermined time has passed from the timer 21 or a cam signal in steps S309 and S310. It is in a state of waiting for input of either of the pressing start signals from the position detection switch 18. In this case, in this example, even if the push start detection signal has been output from the cam position detection switch 18 in step S304 before the lock escape processing is started, step S304 is performed again.
At 310, it is determined whether or not the state in which the pressing start signal is output continues.

In the signal input waiting state in steps S309 and S310, the cam position detection is performed before receiving the signal indicating that the predetermined time limit has elapsed from the timer 21 by the second time measurement. When the microcomputer 12 receives the pressing start detection signal from the switch 18, in this example, in step S311, it is determined whether a predetermined time has elapsed since the start of the lock escape processing. In this example, this determination is made based on whether the time measured by the second time measurement of the timer 21 has passed a predetermined time,
If the predetermined time has not yet elapsed, step S3
At 12, it is determined whether or not the cam 15 has rotated to a position at which the hook 16b of the lock lever 16 is removed from the stopper 20. In this example, this determination is made by the cam position detection switch 18.
It is determined whether or not there has been an output of a press end detection signal from the CPU. If the signal of the press end detection signal has not yet been output, the process returns to step S311 again to determine whether or not there has been a signal output from the timer 21 indicating the elapse of a predetermined time. Judge. That is, in this example, when the microcomputer 12 receives the pressing start detection signal from the cam position detection switch 18 in the signal input waiting state in step S309 and step S310, the processing proceeds to step S311 and step S3.
At 12, the control waits for input of either a signal indicating the elapse of a predetermined time from the timer 21 or a signal indicating that the pressing of the cam position detection switch 18 has been completed.

In the signal input waiting state in steps S311 and S312, the cam position detection is performed before receiving the signal indicating that the predetermined time limit has elapsed from the timer 21 by the second time measurement. When the microcomputer 12 receives the pressing end detection signal from the switch 18, in step S <b> 313, the drive of the motor 13 is stopped, and a process of terminating the lock escape process is performed. In this example, in this example, the microcomputer 12 outputs a predetermined signal to the motor driving circuit 14 to instruct the motor driving circuit 14 to stop the motor 13, and the motor driving circuit 14 receiving the predetermined signal output applies the predetermined signal to the motor 13. The supply of the second fixed voltage is stopped, and the driving of the motor 13 is stopped. Motor 1
When the driving of No. 3 is stopped, the tray 11 removal processing of the present example ends.

In this example, when the input of the signals is awaited in steps S309 and S310, the cam position detection switch 18 does not output the pressing start detection signal, or steps S311 and S3.
When the microcomputer 12 waits for a predetermined time limit by the second time measurement from the timer 21 without the output of the pressing end detection signal from the cam position detection switch 18 in the signal input wait state at 12. When a signal indicating that the lock operation has been performed is received, the drive of the motor 13 is stopped in step S313 to terminate the lock escape processing, thereby forcibly terminating the tray 11 removal processing in this example.

That is, in this example, as shown in FIG. 4B, the time t when the removal process of the tray 11 is started.
₀ , the motor drive circuit 14 applies the _first fixed voltage V ₁ to the motor 13 and applies the normal rotation force to the rotating shaft 1 of the motor 13.
3a is rotated and the timer 21 is set to the first state without outputting the push-down end detection signal from the cam position detection switch 18.
The time measured by the time measurement of the predetermined time limit T
_At time t ₁ when the motor drive circuit 1
4 changes the voltage applied to the motor 13 to a second fixed voltage V ₂ to increase the rotational force and
To rotate. Then, at time t ₂ is when receiving the pressing end detection signal from the cam position detecting switch 18 as shown in B of FIG. 4, the motor drive circuit 14 is the motor 1
The supply of the _second fixed voltage V ₂ applied to 3 is stopped,
The operation of the motor 13 is stopped, and the process ends.

The processing for storing the tray 11 in, for example, a disk drive for storing the tray 11 is performed in such a manner that the user pushes the tray 11 against the repulsive force of the take-out spring 19 in this example. I do. In this case, when the tray 11 is pushed to some extent, the stopper 2 is positioned at a desired position of the hook 16b of the lock lever 16.
0 touches. When the tray 11 is further pushed in, the hook 16
b slides against the stopper 20 and the locking spring 17
While pulling on the hook 16
When the slider 16 is slid to the end of the portion b, the hook 16 b is hooked on the stopper 20 by the restoring force of the locking spring 17. In this way, the tray 11 is moved out of the take-out spring 19.
Is stored so as not to protrude from the disk drive due to the repulsion force.

With such a configuration, the tray 11 can be taken out of the motor 13 for some reason such as when the resistance for rotating the rotating shaft 13a of the motor 13 itself or the sliding contact resistance of each member is increased. Motor 13 for performing
Even if the load on is increased and the processing is not completed within the time set in the timer 21, the tray 11 can be taken out by one processing without performing the processing many times. . Further, even when the load on the motor 13 for taking out the tray 11 is increased and the eject mechanism itself is locked and the tray 11 cannot be taken out, the locked state is not changed. The tray 11 can be escaped, and the tray 11 can be reliably taken out.

Further, with such a configuration, it is possible to make many members constituting the tray ejecting mechanism of this embodiment substantially the same as the members constituting the conventional tray ejecting mechanism. Therefore, it is possible to configure the tray eject mechanism of the present example by using most of the members conventionally used. Therefore, it is possible to provide a tray ejecting mechanism that realizes desired processing at substantially the same price without being expensive compared with a conventional tray ejecting mechanism. In particular, if the time limit set in the second time measurement is set to be the same as the time limit in the first time measurement, a timer equivalent to the conventional one can be used. An example tray eject mechanism can be configured.

Further, with this configuration, the process can be forcibly terminated when a predetermined time limit has elapsed from the start of the lock escape process, so that the switch lever 18a of the cam position detecting switch 18 The drive of the motor 13 can be reliably stopped even when the end of the press after the press cannot be recognized due to some obstacle.

In the above-described embodiment, the motor drive circuit 14 applies a fixed voltage in two steps. However, the motor drive circuit 14 can apply a fixed voltage in three or more steps.
The motor 13 may be driven by three or more driving forces. In this case, when the time measured by the first time measurement reaches the predetermined time limit, the second fixed voltage is applied, and the tray 11 cannot be taken out even by the supply of the second fixed voltage. In this case, for example, the driving force of the motor 13 is sequentially increased by sequentially changing the third fixed voltage, the fourth fixed voltage, and each applicable fixed voltage at predetermined time intervals, and
When there is an output of the press end detection signal from the cam position detection switch 18, the application of the voltage may be stopped to end the processing. With this configuration, the tray can be optimally and reliably taken out according to the increased load on the motor.

In the above-described embodiment, the motor control of the tray removal processing in the disk drive provided in the notebook personal computer has been described. However, the present invention is not limited to this, and may be a desktop personal computer, a word processor, or the like. It is needless to say that the present invention can be applied to, for example, a tray removal process in a disk drive or the like included in the device or a tray removal process of other various electronic devices.

[0054]

According to the first aspect of the present invention, the tray can be reliably taken out even if the load on the motor for taking out the tray has increased.

According to the second aspect of the present invention, when the lock escape processing is out of the time limit, the processing can be forcibly terminated, and it is recognized that the tray has been removed due to some trouble. Even if it is not possible, the driving of the motor can be reliably stopped.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a configuration according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a tray installation location according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating an example of an operation according to the embodiment of the present invention;

FIG. 4 is a waveform diagram illustrating an example of a relationship between an output signal of a cam position detection switch and a voltage applied by a motor drive circuit when a process is not completed within a time limit according to an embodiment of the present invention.

FIG. 5 is a configuration diagram showing an example of a configuration for driving a conventional tray.

FIG. 6 is a flowchart illustrating an example of an operation according to the example of FIG. 5;

FIG. 7 is a waveform chart showing an example of a relationship between an output signal of a cam position detection switch and a voltage applied by a motor drive circuit when processing is completed within a time limit according to the example of FIG. 5;

8 is a waveform diagram illustrating an example of a relationship between an output signal of a cam position detection switch and a voltage applied by a motor drive circuit when processing is not completed within a time limit according to the example of FIG. 5;

[Explanation of symbols]

11: tray, 12: microcomputer, 13: motor, 14: motor drive circuit, 15: cam, 16: lock lever, 17: locking spring, 18: cam position detection switch, 19: take-out spring, 20: stopper , 21
… Timer

Claims (2)

[Claims] A tray that is housed in a predetermined housing and is taken out by a restoring force of an elastic body; a lock lever that locks and stores the tray in the housing; A cam for releasing the lock by the lock lever, a motor for rotating the cam when the tray is taken out, a normal processing time measuring means for measuring a time from the start of driving the motor, and the lock lever Detecting means for detecting that the lock has been unlocked by the position of the motor; stopping the motor when the detecting means detects the unlocking; and detecting the predetermined time by the normal processing time measuring means. Control means for increasing the driving force of the motor when the detecting means does not detect unlocking. 2. The tray ejecting device according to claim 1, further comprising a high driving force processing time measuring means for measuring a time after increasing a driving force of the motor, wherein the high driving force processing time measuring means is a predetermined one. A tray ejecting device for controlling the motor to stop when the detecting means does not detect the unlocking until the time is measured;