WO2005096285A1

WO2005096285A1 - Initiarizing device, its method, its program, recording medium where the program is recorded, and information processor

Info

Publication number: WO2005096285A1
Application number: PCT/JP2005/006361
Authority: WO
Inventors: Yuji Yamada; Tomonori Nakada
Original assignee: Pioneer Corporation
Priority date: 2004-03-31
Filing date: 2005-03-31
Publication date: 2005-10-13

Abstract

An information processing section (240) provided with a pickup (242) is supported movably on a guide shaft (231) so supported as to bridge step parts (212) facing each other. A movement regulating click (241B) for the information processing section (240) engages with a lead screw (232A) of a motor (232) for movement. At the time of initialization for recognizing the position of the pickup (242), about the same number of driving pulses of microstep driving frequency as that of pulses for moving the pickup (242) over the whole movable range between the step parts (212) are supplied to the motor (232) for movement. After bringing the pickup (242) into contact with the innermost circumference-side step part (212) opposite to the waiting position and causing step out, the position of the pickup (242) is set at the innermost circumference position. Pulsating noise can be reduced at the time of step out.

Description

INITIALIZATION DEVICE, ITS METHOD, ITS PROGRAM, RECORDING MEDIUM RECORDING THE PROGRAM, AND INFORMATION PROCESSING DEVICE

Technical field

The present invention recognizes a position of an information processing unit that performs at least one of a reading process of reading information recorded on a recording surface of a recording medium and a recording process of recording the information on the recording surface. The present invention relates to an initialization apparatus, a method thereof, a program thereof, a recording medium storing the program, and an information processing apparatus.

Background art

Conventionally, various configurations for recognizing the position of a pickup are known for a disk device that reads information from or records information on a disk-shaped recording medium such as an optical disk (for example, see Patent Reference 1 (see Patent Reference 3).

[0003] In the one described in Patent Document 1, when the pickup is positioned at the innermost circumference of the optical disc, the movement toward the inner circumference side is regulated by the regulation means. Then, the rotation of the motor for moving the pickup is detected by a Hall element used for rotation control, and it is determined that the pickup is positioned at the innermost circumference. However, the configuration described in Patent Document 1 requires a Hall element for detecting the rotation state of the motor, and the configuration cannot be simplified.

[0004] In the device disclosed in Patent Document 2, a motor current of a motor for moving a pickup is detected by a current detecting unit, and a pulsating component generated at the time of phase switching is detected by a pulsating component detecting unit. When the pickup is located at the innermost periphery of the optical disk, the movement is regulated by contacting the regulating means. At this time, a configuration is adopted in which the pulsating flow component at the time of phase switching disappears, and it is recognized that it is located at the innermost circumference. However, with the configuration described in Patent Document 2, the circuit configuration for detecting the motor current becomes complicated, and it is difficult to simplify the configuration.

[0005] In the device described in Patent Document 3, a pickup is slidably supported by a guide shaft fixed to a support member of a chassis plate. Further, a mating projection provided on the pickup is combined with a tooth surface of a lead screw connected to a drive shaft of the stepping motor. And When recognizing the position of the pickup, the drive pulse is supplied to the stepping motor in a number proportional to the number greater than the value corresponding to the pickup moving range, and the pickup is forcibly brought into contact with the support member, and the optical axis of the objective lens is adjusted. The center is securely aligned with the outermost peripheral position of the optical disk, and the count value of the internal counter is preset to the maximum value to position the pickup normally. When the pickup is forcibly brought into contact with the support member, the coupling projection is stepped out to prevent generation of harsh sounds by jumping over the tooth surface of the lead screw. However, with the configuration described in Patent Document 3, the shape relationship between the tooth surface for synchronizing and the mating projection is strict, and it is difficult to improve the manufacturability. In addition, step-out can prevent the projections from jumping over the tooth surface of the lead screw and generating unpleasant noise.On the other hand, pulsating noises may be generated while the drive norse is supplied to the stepping motor. is there.

Patent Document 1: JP-A-2003-187466 (page 4, left column, page 5, right column)

Patent Document 2: Japanese Patent Application Laid-Open No. 2003-134879 (page 3, right column—page 5, right column)

Patent Document 3: Japanese Patent Application Laid-Open No. 2002-109839 (page 3 right column-page 8 left column)

Disclosure of the invention

Problems to be solved by the invention

[0007] As described above, in the configuration using the Hall element described in Patent Document 1, a configuration for detecting the rotation state of the motor is required, and the configuration cannot be simplified. Further, in the configuration described in Patent Document 2 that detects a motor current, the circuit configuration is complicated, and it is difficult to simplify the configuration. Further, in the configuration described in Patent Document 3 in which a drive pulse is supplied more than the value corresponding to the pickup moving range to force the pickup to abut on the support member, the pickup is supplied to the stepping motor even after the movement is restricted. For example, there is a problem that a pulsation-like noise may be generated depending on the drive panel to be used.

The present invention has been made in consideration of the above-described circumstances and the like, and has provided an initialization apparatus, a method thereof, a program thereof, a program thereof, a recording medium having the program recorded therein, and an information processing apparatus capable of performing good position recognition of the information processing unit. It is an object to provide a processing device.

Means for solving the problem

[0009] In the initialization device of the present invention, the movable range is regulated by the regulating device, and the driving device is driven. At least one of a reading process for reading information recorded on the recording surface of the recording medium and a recording process for recording the information on the recording surface is performed. An initialization apparatus for recognizing a position of an information processing unit, comprising: drive control means for controlling a drive state of the drive means; Means for controlling the movement of the driving means by micro-step control to bring the information processing section into contact with the regulating means; and controlling the movement of the information processing section to be performed by the regulated movement processing means. And a position recognizing means for recognizing the position of the information processing unit as an end position in the movement direction in the movable range within the movable range when recognizing completion. The

[0010] Alternatively, the initialization apparatus of the present invention is characterized in that the movable range is regulated by the regulating means, the information is moved within the movable range by the driving means, and is recorded on the recording surface of the recording medium. An initialization device for recognizing a position of an information processing unit that performs at least one of a reading process of reading the information and a recording process of recording the information on the recording surface, wherein the entire area of the movable range is the information. Initialization setting in which the processing unit performs microstep control of the driving of the driving unit in a substantially movable time, and recognizes the position of the information processing unit as an end position in the movement direction during the movement within the movable range. It is characterized by having means.

[0011] In the initialization method of the present invention, the movable range is regulated by the regulating unit by the computing unit, the movable range is moved within the movable range by the driving of the driving unit, and is recorded on the recording surface of the recording medium. An initialization method for recognizing a position of an information processing unit that performs at least one of a reading process of reading information and a recording process of recording the information on the recording surface, wherein the arithmetic unit includes the information processing unit. The unit moves the drive of the driving unit by micro-step control in a time period in which the unit can move substantially in the entire movable range, and causes the information processing unit to contact the regulating unit, and information that has contacted the regulating unit. The position of the processing unit is recognized as an end position in the movement direction during the movement within the movable range.

[0012] An initialization program according to the present invention includes an arithmetic unit configured as the above-described initialization apparatus according to the present invention. It is characterized by functioning.

[0013] Alternatively, an initialization program of the present invention causes an arithmetic unit to execute the above-described initialization method of the present invention.

[0014] A recording medium on which the initialization program of the present invention is recorded is characterized in that the above-described initialization program of the present invention is recorded in an arithmetic unit so as to be readable.

[0015] The information processing device of the present invention is an information processing unit that performs at least one of a reading process of reading information recorded on a recording surface of a recording medium and a recording process of recording the information on the recording surface. Driving means for moving the information processing section along the recording surface; regulating means for restricting a movable range of the information processing section moved by driving of the driving means; and an entire area of the movable range. Initialization setting means for controlling the driving of the driving means by micro-step control during a time when the information processing section is substantially movable, and recognizing a position of the information processing section as an end position in a movement direction within the movable range. And characterized in that:

[0016] Also, the information processing apparatus according to the present invention determines at least one of a reading process for reading information recorded on a recording surface of a recording medium and a recording process for recording the information on the recording surface, and at least one of deviations. An information processing unit to be implemented; a driving unit that moves the information processing unit along the recording surface; a restricting unit that restricts a movable range of the information processing unit that is moved by driving the driving unit; The initialization device of the present invention, which controls the driving of the driving means and recognizes the position of the information processing section.

Brief Description of Drawings

FIG. 1 is a plan view showing a schematic configuration of a disk device according to an embodiment of the present invention.

FIG. 2A is an explanatory diagram illustrating a rotating state of a disk processing unit of the disk device according to the embodiment, and is a conceptual diagram of a state where an optical disk is located at a loading completion position.

FIG. 2B is an explanatory diagram for explaining a rotating state of a disk processing unit of the disk device according to the embodiment, and is a conceptual diagram of a state when an optical disk is inserted or ejected.

FIG. 3 is a waveform diagram showing a two-phase drive frequency drive panel to be supplied to and driven by the moving electric motor according to the embodiment; FIG. FIG. 3 is a waveform diagram showing a panel, and (B) a waveform diagram showing a drive pulse supplied to a B phase of a moving electric motor.

FIG. 4 is a waveform diagram showing a drive pulse of a micro-step drive frequency to be supplied to and driven by the electric motor for movement according to the one embodiment. (A) A drive panel supplied to the A phase of the electric motor for movement FIG. 5B is a waveform diagram illustrating a driving pulse supplied to the B phase of the moving electric motor.

FIG. 5 is an explanatory diagram showing a state in which the pickup according to the embodiment is located at an outermost peripheral position.

FIG. 6 is an explanatory diagram illustrating a movement state of a pickup according to the embodiment.

FIG. 7 is an explanatory diagram showing a state in which the pickup according to the embodiment is located at an intermediate position in a movable range.

FIG. 8 is a graph showing a behavior when one drive pulse is supplied to a moving electric motor in the one embodiment.

FIG. 9 is an explanatory diagram showing a state where the pickup in the embodiment is in a standby position. Explanation of symbols

[0018] 10 ···· Optical disk as a disk-shaped recording medium as recording medium

1 OA: Recording surface

110… Case body

200 · "Disk processing unit as information processing device

210… pedestal

212: Step portion as regulating means

230Processing / moving means as driving means

231 · 'Stepping motor

240 ... Information processing section

W… Movable range

BEST MODE FOR CARRYING OUT THE INVENTION

[Configuration of Disk Device]

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, only reading or recording of force information, which is described as an example of a so-called slot-in type disk device for recording and reading information on an optical disk which is a removable disk-shaped recording medium as a recording medium, may be used. Further, the disk-shaped recording medium is not limited to an optical disk, but may be any disk-shaped recording medium such as a magnetic disk and a magneto-optical disk. Further, any recording medium, such as a cylindrical recording medium having a recording surface on the outer peripheral surface or a recording medium integrally provided, can be used. Also, for example, a so-called thin slot-in type mounted on an electric device such as a portable personal computer is exemplified, but a device having a tray for transporting an optical disk, or a pickup integrated with the tray is provided. Any configuration such as a so-called slim drive can be applied. For example, it may be configured as a single unit such as a game machine or a playback device that performs processing for recording and playback such as video data recording, and is not limited to a thin configuration.

In FIG. 1, for convenience of explanation, a part of the configuration of a transport unit that transports an optical disk is omitted.

1 and 2, the disk device 100 is a so-called thin slot-in type that is mounted on an electric device such as a portable personal computer. This disc device 100 is an information processing for reading various information recorded on a recording surface 10A provided on at least one surface of a disc-shaped optical disc 10 as a disc-shaped recording medium which is detachably mounted. A certain reading process and a recording process as an information process for recording various information on the recording surface 10A are performed. The disk device 100 has, for example, a substantially box-shaped case body 110 made of metal and having an internal space. The case body 110 is provided with a decorative plate 111 formed in an elongated plate shape on one side surface, for example, of synthetic resin. The decorative plate 111 has an opening (not shown) provided in a slit shape along the longitudinal direction. Further, in the case body 110, a disk processing unit 200 as an information processing apparatus called a traverse mechanism, a driving unit 300 for moving the disk processing unit 200, and a transport unit 400 for transporting the optical disk 10 And a control circuit unit provided with an initial setting unit, which is an initialization device as an arithmetic unit, mounted on a circuit board. Then, the disk processing unit 200 and the driving unit 300 constitute the operating unit of the present invention. The disk processing section 200 has a pedestal section 210 as a rotating body formed of, for example, a metal plate in a flat octagonal shape in plan view. The pedestal portion 210 is formed in a frame shape having a cutout portion 211 provided substantially at the center. Further, on the inner peripheral surface of the notch 211 of the pedestal 210, for example, two pairs of steps 212 as a pair of regulating means facing each other along the longitudinal direction of the pedestal 210 are provided.

As shown in FIG. 1, the pedestal portion 210 is provided with a disk rotation driving means 220 located at one end in the longitudinal direction near the periphery. As shown in FIG. 2, for example, the disk rotation drive means 220 includes a rotary electric motor 221 which is a spindle motor, and a turntable 222 provided integrally with the output shaft 221A of the rotary electric motor 221. have. The electric motor for rotation 221 is controllably connected to the control circuit unit, and is driven by the electric power to which the power of the control circuit unit is also supplied. The turntable 222 has a substantially columnar rotating shaft 222A which is a shaft supporting portion that is inserted into a shaft hole 10B formed at the center of the optical disc 10 to support the optical disc 10, and a flange-shaped outer circumferential surface of the rotating shaft 222A. And a flange 222B on which the periphery of the shaft hole 10B of the optical disc 10 is placed and supported. Then, the turntable 222 rotates together with the optical disc 10 that is supported by the rotation of the rotation electric motor 221.

The pedestal unit 210 is provided with a processing moving unit 230 as a driving unit. The processing moving means 230 includes a pair of guide shafts 231 and a moving electric motor 232 which is, for example, a two-phase stepping motor. The pair of guide shafts 231 are formed, for example, in the shape of an elongated metal bar, and are supported in a state in which both ends in the axial direction are bridged between the step portions 212 of the pedestal portion 210. Are arranged substantially parallel to each other. In addition, the electric motor 232 for movement is controllably connected to the control circuit, and is driven by electric power to which the power of the control circuit is also supplied. An elongated rod-shaped lead screw 232A made of metal, for example, is coaxially and integrally connected to an output shaft (not shown) of the electric motor 232 for movement. An engaging groove 232B is provided spirally on the outer peripheral surface of the lead screw 232A.

Further, the pedestal 210 is provided with an information processing section 240 supported by the processing moving means 230. The information processing section 240 is bridged between the pair of guide shafts 231. It has a movable holding unit 241 that is held. The movable holding unit 241, the movement restriction to be engaged with the holding portion 241A interpolating fitting the guide shaft ² 31 movably, the engaging groove 232B of connected lead screw 232A to the output shaft of the moving electric motor 232 And a claw portion 241B. In addition, the movement holding unit 241 of the information processing unit 240 includes a light source (not shown), a lens 242A that converges light from the light source, and an optical sensor (not shown) for detecting light reflected from the optical disk 10. A pickup 242 provided is provided. The pickup 242 is connected to the control circuit so as to be able to transmit and receive signals. Under the control of the control circuit, the pickup 242 reads various information recorded on the recording surface 10A of the optical disc 10 and outputs the information to the control circuit. Then, a recording process for recording various information on the recording surface 10A of the control circuit unit is performed.

[0025] A cover body (not shown) cut out corresponding to the movement path of the pickup 242 and the turntable 222 is integrally attached to the disk processing section 200 so as to cover the pedestal section 210. . The disk processing unit 200 is configured such that the side on which the turntable 222, which is one end in the longitudinal direction, of the pedestal 210 is rotatable in a direction substantially along the axial direction of the rotating shaft 222A, and the other end of the pedestal 210 is It is pivotally supported by the case body 110 and is disposed in the case body 110!

As shown in FIG. 1, the drive unit 300 includes a motor (not shown) provided in the case body 110 and operation-controlled by, for example, a control circuit unit, and a moving cam 310 moved by driving the motor. , Is provided. The moving cam 310 engages with an engaging claw 213 projecting outward from the pedestal portion 210 and engages with the motor, and is moved by driving the motor to rotate the pedestal portion 210. The rotation of the pedestal part 210 is a state in which the rotating shaft 222A of the turntable 222 advances and retreats on the movement path on which the optical disk 10 is transported by the transport means 400. Specifically, the advance position shown in FIG. 2A, in which the rotation axis 222A of the turntable 222 advances on the movement path of the optical disk 10, and the rotation axis 222A of the turntable 222 are positioned on the movement path of the optical disk 10. Rotate between the retracted position shown in FIG. 2B and the retracted position shown in FIG. 2B. 2A and 2B when the optical disk 10 is waiting for insertion. If the insertion standby state is as shown in FIG. 2A, the insertion of the optical disk 10 is detected by a separately provided sensor or the like, and the optical disk 10 is moved to the retracted position shown in FIG. 2B. Just move it.

As shown in FIG. 1, the transport means 400 is provided with a transport motor (not shown) provided in the case body 110, for example, the operation of which is controlled by a control circuit unit, and a link (not shown) that is linked by driving the transport motor. It has a mechanism section and a detection switch 420 as a carry-in detection means. The link mechanism section includes a detection arm 431, an interlocking arm 432, and a carry-in arm (not shown). The detection arm 431, the interlocking arm 432, and the carry-in arm are formed in an elongated plate shape, for example, by a metal plate or the like, and one end in the longitudinal direction is rotatably supported by the case body 110.

[0028] The detection arm 431 and the interlocking arm 432 are rotatably supported at their intermediate portions in the longitudinal direction and are connected to each other so that the interlocking arm 432 rotates with the rotation of the detection arm 431. Further, the loading arm is rotatably disposed inward at the other end thereof near the opening of the case body 110, and the other end thereof is brought into contact with the peripheral edge of the optical disk 10 to load the optical disk 10. A pulley (not shown) in which the center in the axial direction is formed to have a small diameter and the peripheral surface of the optical disc 10 is in contact with the periphery of the detection arm 431 and the carry-in arm near the rotating end thereof is rotatable. It is pivoted.

Note that the detection arm 431 and the carry-in arm can be moved outward by staking when a relatively strong force is applied. Specifically, when the optical disk 10 is pushed into the opening, It is rotatable so as to be pushed outward by the peripheral surface of the cover. Then, when the disk processing unit 200 is located at the retracted position shown in FIG. 2B, the link mechanism unit is in a state where the tip end side of the detection arm 431 is rotated toward the opening.

[0029] The detection switch 420 is provided on the case body 110, and is turned on and off according to the rotation state of the interlocking arm 432. Specifically, the detection arm 431, which is the position where the optical disc 10 is processed by the pickup 242, which is the loading completion position, is turned off near the standby position (see FIG. 1), and the detection arm 431 is turned off at other times. It is in a state where it is turned on when it is moved. The on / off signal of the detection switch 420 is output to the control circuit.

The control circuit controls the overall operation of the disk device 100. The initialization setting unit of the control circuit unit includes, for example, a drive control unit, a regulation movement processing unit, and a position recognition unit as a program. [0031] The drive control means controls the drive state of the electric motor 232 for movement. The driving state is controlled by appropriately supplying a driving panel having a different waveform to the electric motor 232 for movement. The supplied drive pulse is, for example, a two-phase drive control for two-phase drive control as shown in the waveform diagram of FIG. 3A for the purpose of moving the pickup 242 at high speed between the vicinity of the inner circumference and the vicinity of the outer circumference of the optical disc 10. The drive frequency and the micro-step drive frequency for micro-step control as shown in the waveform diagram of FIG. 4 during the initialization processing for recognizing the minute movement of the pickup 242 during information processing and the position of the pickup 242. And are supplied as appropriate. Further, when the disk processing unit 200 is rotated to the state shown in FIG. 2B, the drive control means is in the retracted position on the rotation base end side opposite to the side on which the turntable 222 is provided, that is, the optical disk shown in FIG. The pickup 242 is controlled so as to be located at the outermost position A of 10. This movement can be controlled by supplying a drive pulse of either a two-phase drive frequency or a microstep drive frequency.

[0032] The regulation movement processing means performs processing for causing the drive control means to perform control for moving the pickup 242 under predetermined conditions for initialization processing, for example.

The initialization process is performed by recognizing a signal requesting execution of the initialization process, for example, at the beginning of power supply or at a predetermined time measured by a separate timer. The content of control by the drive control means at the time of this initialization processing is to control the drive control means to supply a predetermined number of drive panels to the moving electric motor 232 at a predetermined drive panel, ie, a microstep drive frequency.

As shown in FIG. 5, the number of drive pulses to be supplied is the number required for the pickup 242 to move over the entire movable range W between the steps 212 of the pedestal 210. They are supplied in the same number or a slightly larger number, and are driven for the time necessary to substantially move the entire range of the movable range W.

The direction in which the pickup 242 is moved by the supply of the drive pulse is opposite to the retracted position of the pickup 242, which is the outermost position A of the optical disc 10 in FIG. 6, that is, the innermost circumference of the optical disc 10 in FIG. In the direction to move to the turntable 222 side, which is the position B side, supply is performed in a waveform in this state. As a result of this initialization process, the pickup 242 causes the holding portion 241A to contact the step portion 212 of the pedestal portion 210, and further supplies the drive pulse As a result, the movement restricting claw portion 241B engages with the engagement groove 232B of the lead screw 232A, so that the lead screw 232A cannot rotate, resulting in a so-called step-out state.

When the position recognizing unit recognizes the completion of the control for moving the pickup 242 performed by the restricted movement processing unit, the position recognizing unit changes the position of the pickup 242 to the end position in the moving direction during the movement within the movable range W. recognize. Specifically, the position recognizing means recognizes that the supply of the predetermined number of pulses for moving the pickup 242 in the entire movable range W at the time of initialization processing of the predetermined drive pulse by the drive control means has been completed. Then, the pickup 242 contacts the step 212 on the turntable 222 side, determines that the pickup 242 is located at the innermost position B, and sets, for example, the internal counter to a value corresponding to Ctin indicating that it is the innermost position. .

[Operation of Disk Device]

Next, the operation of the disk device 100 of the embodiment will be described. FIG. 7 is an explanatory diagram showing a state where the pickup is located at an intermediate position in the movable range. FIG. 8 is a graph showing the behavior when one drive pulse is supplied to the electric motor for movement. FIG. 9 is an explanatory diagram showing a state where the pickup is at the standby position.

First, power is supplied to the disk device 100 by turning on the electric device. By the supply of the electric power, the control circuit recognizes the rotating state of the disk processing unit 200 based on the ON / OFF state of the detection switch. Specifically, when the detection switch is turned off, the detection arm 431 of the link mechanism is determined to be at the standby position, the disk processing unit 200 determines that it is at the advanced position shown in FIG. Judge as inserted. On the other hand, when the detection switch is on, it is determined that the tip of the detection arm 431 is rotating toward the opening, and the disk processing unit 200 determines that the disk is in the retracted position shown in FIG. Is determined to be in a state of waiting for insertion of the optical disc 10 in which is not loaded. Then, the control circuit outputs a signal regarding whether or not the optical disc 10 is inserted to a circuit for controlling the operation of the electric device.

Then, when the optical disk 10 is inserted through the opening in the state of waiting for the insertion of the optical disk 10, the peripheral edge of the optical disk 10 abuts on the pulley of the detection arm 431. When the optical disk 10 is further pushed in in this state, the detection arm 431 and the carry-in arm are pushed out in a state where they are urged and rotated outward. Then, the optical disk 10 is pushed into the position shown in FIG. 2A. Then, the carry-in arm moves over the periphery of the optical disc 10, and the urging force acts again on the state in which the carry-in arm rotates inward. The urging force causes the optical disc 10 to be carried into the carry-in completion position.

Further, when the optical disk 10 is carried in before the carrying-in completion position shown in FIG. 5, the detection switch 420 is turned off. When the control circuit unit recognizes that the detection switch 420 is turned off, the control circuit unit drives the motor of the driving unit 300 to move the moving cam 310 to rotate the disk processing unit 200 to the advanced position shown in FIG. 2A. Start. Then, when the optical disk 10 is carried in to the carry-in completion position shown in FIG. 1, the detection arm 431 becomes the standby position, and the movement of the optical disk 10 is regulated. By positioning the optical disk 10 at this position, as shown in FIG. 2A, the rotating shaft 222A of the turntable 222 of the rotating disk processing unit 200 is inserted into the shaft hole 10B opened substantially in the center of the optical disk 10. The optical disk 10 is inserted and inserted into the turntable 222.

Further, the control circuit unit determines that the optical disc 10 has been carried in to the carry-in completion position and the disc processing unit 200 has reached the advanced position shown in FIG. To execute the initialization process. Specifically, when it is determined that the power is turned on and the disk processing unit 200 has reached the advanced position shown in FIG. 2A, it is determined that the initialization processing is required. Then, the regulation movement processing means determines that the pickup 242 is located at the outermost peripheral position A as shown in FIG. 5 because the regulation movement processing means is the initialization processing immediately after the disk processing unit 200 is rotated to the advanced position. I do. As a result, the restricted movement processing means can provide a number equal to or slightly larger than the number required for moving the pickup 242 to the turntable 222 side, which is the inner peripheral side of the optical disc 10, over the entire movable range W. The drive control means performs a process of supplying the drive electric motor 232 with a drive pulse having a micro-step drive frequency as shown in FIG.

When the drive pulse having the microstep drive frequency is supplied, the pickup 242 is moved to the step 212 on the rotation base end side of the disk processing unit 200 on the outermost side of the optical disk 10 on the opposite side of the moving direction. At the position of the outermost peripheral position A where the contact is made, the pickup 242 is moved toward the step portion 212 on the turntable 222 side, and is brought into contact with the last drive pulse, or a few more pulses are supplied upon contact. It will be in the state to be performed. Also external When the pickup 242 has been moved due to the impact, or when information processing such as read processing and recording processing has already been performed, the pickup 242 moves over the movable range W as shown in FIG. It is in a state of being located at the intermediate position. Therefore, even if the drive pulse is supplied and abuts on the step 212 on the turntable 222 side, the drive pulse is further supplied. This drive pulse is continuously supplied.

Here, when the drive pulse is supplied, the electric motor for movement 232 shows a relational behavior between the rotor magnet and the stator (not shown) as shown in FIG. That is, when the driving pulse is supplied, the stopped output shaft starts rotating while accelerating at a predetermined step angle Θs for one pulse. Then, after passing through a predetermined step angle Θs, a state is returned in the opposite direction after overshooting a certain angle. This overshoot is repeated while attenuating, and stops at a stable position with a predetermined step angle Θs.

Therefore, when a drive pulse having a two-phase drive frequency as shown in FIG. 3 is supplied during the initialization process, the width of one pulse is large, so that the angular width of overshoot is large and vibration is large. On the other hand, in the driving pulse of the micro-step driving frequency as shown in FIG. 4, the step angle Θs is close to the stop position, and the angular width at which the over-step is performed is small. As a result, by supplying a drive pulse having a micro-step drive frequency during the initialization process, it is possible to significantly suppress the generation of pulsation-like abnormal noise due to the so-called vibration at the time of step-out, and to achieve good noise reduction. You.

Then, the position recognizing means of the control circuit recognizes the completion of the control for moving the pick-up 242 performed by the restricted movement processing means, and for example, sends a predetermined number of panels from the drive control means to the moving electric motor 232. It is determined whether or not the power has been supplied. When the position recognizing means determines that the control for moving the pickup 242 has been completed, the pickup 242 abuts on the step 212 on the turntable 222 side of the pedestal 210 and is located at the innermost circumference. Then, for example, the internal counter is set to a value corresponding to Ctin indicating that it is the innermost circumference.

After that, when the initialization processing is completed, the control circuit controls the pickup 242 to move to a standby position for information processing as shown in FIG. The movement is controlled by, for example, supplying a predetermined drive pulse to the movement electric motor 232 by the drive control means. The focusing is performed by controlling the pickup 242 while moving the pickup 242 to read information of, for example, a lead-in area (LA) of the optical disc 10. For example, when the optical disk 10 is a CD-DA (Compact Disk-Digital Audio), the TOC (Table Of Contents) information is read. Then, the pickup 242 is moved to a standby position where the boundary position between the lead-in area and the program area (PA: Program Area) shown in FIG. That is, it is determined whether or not the control circuit unit requests execution of a reading process of reading information recorded on the recording surface 10A of the optical disc 10 or a recording process of recording information on the recording surface 10A. Then, when the control circuit recognizes a request for execution of information processing, for example, a request signal output from an electric appliance, the control circuit appropriately applies the electric motor 221 for rotation, the electric motor 232 for movement, and the pickup 242. And performs a reading process or a recording process.

As shown in FIG. 9, when initialization is performed when the pickup 242 is located at the standby position when the lead-in area is located on the inner peripheral side of the optical disk 10 as the home position, the regulation movement processing means Causes the pickup 242 to move to the outermost position A as shown in FIG. Examples of the initialization process include a case where the pickup 242 is moved to the standby position after the power is turned on, a case where the initialization process is performed after a predetermined time has elapsed, and the like. Then, as the initialization processing, microstep control is performed in a direction opposite to the above-described initialization processing. That is, the drive electric motor 232 is driven by the micro step driving frequency so that the pickup 242 is moved in a direction in which the pickup 242 is brought into contact with the step portion 212 on the outermost peripheral position A side as shown in FIG. Is supplied to perform the initialization processing.

On the other hand, the control circuit recognizes the insertion state of the optical disc 10 when recognizing the operation of an eject button or the like for requesting the ejection of the optical disc 10 or the ejection request signal of the optical disc 10 output from an electric device. . That is, as described above, the position of the disk processing unit 200 is recognized. Then, when the detection switch is off and the disk processing unit 200 is at the retracted position shown in FIG. 2B, it is determined that the optical disk 10 is not inserted and the insertion standby state is maintained. On the other hand, when it is determined that the optical disk 10 is inserted, the control circuit drives the moving electric motor 232 by the drive control means to move the pickup 242. The control to move to the standby position is performed. In this movement, for example, a drive pulse having a two-phase drive frequency shown in FIG. 3 may be supplied to the movement electric motor 232 to move the pickup 242 at a high speed.

Thereafter, the control circuit unit drives the motor of the drive unit 300 as appropriate to move the moving cam 310, and rotates the disk processing unit 200 to the retracted position shown in FIG. 2B. In this state, the rotation shaft 222A of the turntable 222 is disengaged from the shaft hole 10B of the optical disc 10, and the support state is released. Further, the control circuit unit operates the link mechanism unit of the transport unit 400 such that one end of the detection arm 431 is opened toward the opening, and the detection arm 431 also pushes out the opening force of the optical disc 10.

[Operation and Effect of Disk Device]

As described above, in the above-described embodiment, the drive control unit supplies a drive pulse having a microstep drive frequency to the electric motor for movement 232 to move the pickup 242 over the entire movable range W, thereby forming a stepped portion. After the process of bringing the pickup into contact with 212 is performed by the regulating movement processing means, the position of the pickup 242 is moved by the position recognizing means within the movable range W in the moving direction at the end position, for example, the innermost circumferential position B. Then, the value of the internal counter is set to the value corresponding to Ctin indicating that it is the innermost position B. For this reason, during the initialization process in which the pickup 242 comes into contact with the step portion 212 that regulates movement to recognize the position of the pickup 242, the pickup 242 is also supplied with the state force that comes into contact with the step portion 212 and loses synchronism. Vibration due to the driving pulse to be performed can be greatly reduced, and the generation of abnormal noise can be greatly reduced to achieve good silence, and good position recognition of the pickup 242 can be easily obtained.

Further, a stepping motor is used as the electric motor 232 for movement, and the stepping motor 212 is configured to step out when it comes into contact with the step portion 212. For this reason, there is no generation of loud noise due to so-called tooth skipping of the movement restricting claw portion 241B of the information processing section 240 provided with the pickup 242, and the pickup 242 is located at the outermost position A and the innermost position B. The noise can be reduced with a simple configuration that does not require the provision of a sensor or a switch for detecting that the device is located. That is, such a configuration in which the step-out is performed and the initialization is performed is particularly effective.

[0049] Further, as microstep control of the electric motor for movement 232, a microstep operation cycle is performed. The configuration is such that a drive pulse having a wave number is supplied. Therefore, it is possible to finely control the movement of the pickup 242, reduce occurrence of abnormal noise at the time of step-out, apply the configuration used for conventional information processing as it is, and easily obtain a configuration capable of reducing noise.

Further, during the initialization process, the pickup 242 is moved to abut on the step portion 212 to cause a step out, so that the innermost peripheral position B on the opposite side to the standby position or the retreat position is the lowest. Outer circumference position A. That is, the drive control unit supplies the drive pulse at a microstep drive frequency at which the lead screw 232A has a predetermined rotation direction. For this reason, the pickup 242 is moved in the direction in which the moving distance is increased, and the time length for step-out is relatively shortened, and the vibration time due to the excessively supplied drive pulse at the time of step-out is reduced. The length can be shortened and the noise can be reduced.

In a configuration in which the disk processing unit 200 rotates in a state of ascending and descending in the axial direction of the rotation shaft 222A of the turntable 222, when the disk processing unit 200 performs the initialization processing after being located at the advanced position, The micro-step control is performed so as to contact the innermost position B. For this reason, when the disk processing unit 200 such as a thin slot-in type is rotated to the retracted position, the outermost position at which the pickup 242 becomes a retract position in order to prevent the pickup 242 from colliding with the case body and being damaged. When A is in the standby position, noise can be reduced particularly appropriately.

[0052] In addition, when the disk processing unit 200 is rotated to the advanced position after the power is turned on, the initialization process is performed, and when the pickup 242 is used for information processing.

The direction in which the pickup 242 is moved is appropriately reversed in the case where the initialization process is performed to reach the standby position on the inner peripheral side. Therefore, no matter which timing the initialization process is performed, noise can be appropriately reduced.

The present invention is applied to a disk device 100 using an optical disk 10 as a disk-shaped recording medium. Therefore, the present invention can be easily applied particularly to the initialization processing of the pickup 242 which reciprocates in one direction, and is particularly effective in a configuration in which the pickup 242 reciprocates in the negative direction to perform information processing.

[Modification of Embodiment]

It should be noted that the present invention is not limited to the above-described respective embodiments, but aims at the purpose of the present invention. This includes the following modifications to the extent achievable.

[0055] That is, although the disk device 100 using the disk-shaped recording medium has been illustrated, as described above, not limited to the disk-shaped recording medium, any recording medium such as a cylindrical recording medium can be used. . Further, the present invention can be applied to a configuration in which only one of the reading process and the recording process is performed. Further, the present invention is not limited to the slot-in type, but can be applied to a configuration having a tray. Further, the configuration is not limited to the configuration incorporated in the electric device, and may be configured as a single unit. Further, it may be distributed as an initialization device as a circuit board mounted in the disk device 100, a program for performing the above-described operation, or a recording medium on which the program is recorded.

The configuration for moving the pickup 242 is not limited to a stepping motor, but may be any motor. That is, any control in which power is supplied and driven in a state where the step angle Θs of the lead screw 232A is reduced by the micro-step control can be applied.

When the pickup 242 is at the standby position, the pickup 242 is moved so as to lose synchronism at the innermost position B on the opposite side, and when the pickup 242 is at the standby position on the inner side, the opposite position is set. The moving direction may be appropriately reversed so as to move out of step at the outermost peripheral position A, and the force may be moved to only one of the described forces. The step-out at the innermost peripheral position B is not limited to after the rotation of the disk processing unit 200, but may be performed when the standby position is on the outer peripheral side, for example, when the read-in area of the recording medium is on the outer peripheral side. Is

. Then, in the configuration in which the step-out is performed by moving only to one side, the step portion 212 may be provided only on this one side.

[0058] The configuration for restricting the movement of the pickup 242 is not limited to the configuration using the step portion 212 that supports the guide shaft of the pedestal portion 210. For example, a large diameter is provided near the end of the guide shaft. Any configuration can be used, such as providing a bulging portion to restrict movement. The use of the step portion 212 facilitates simplification of the configuration without the necessity of separately providing a configuration for restricting movement, and facilitates improvement in manufacturability and further downsizing.

Further, as a configuration for transporting the optical disc 10, a configuration including the above-described link mechanism unit The present invention is not limited to this, and any configuration can be used, for example, such that the rotor is appropriately rotated and driven to carry in or out.

[0060] As the configuration for rotating the disk processing unit 200, the force described in the configuration in which the moving cam 310 moves by driving the motor, for example, the moving cam 310 moves with the rotation of the detection arm 431. Either configuration can be used, such as rotation by the Further, the configuration is not limited to the configuration in which the disk processing unit 200 is rotated, but may be any configuration in which the rotation shaft 222A of the turntable 222 can advance and retreat on the movement path of the optical disk 10, for example, by sliding the whole. Furthermore, although the configuration has been described in which the optical disc 10 starts rotating immediately before the loading completion position, the optical disk 10 may be positioned at the loading completion position and start rotating. Note that the force immediately before the loading completion position also starts to rotate, and since the rotation shaft 222A is inserted into the shaft hole 10B at the loading completion position, the operation proceeds in parallel, so the time until information processing is started. Is shortened, and usability can be improved.

[0061] Further, in the standby state for inserting the optical disk 10, the disk processing unit 200 has been described as the retracted position shown in FIG. 2B, but as described above, the advanced position shown in FIG. In this configuration, if the pickup 242 is moved at the advanced position, the pickup 242 does not come into contact with the case body 110, so that the initialization process may be performed when power is supplied. According to this configuration, it is possible to eliminate the time when the optical disk 10 is inserted and the force is initialized, shorten the time until the information reading processing and the recording processing, improve the usability, and improve the external force. As a result, it is possible to prevent the pickup 242 from moving and colliding with the case body 110 to be damaged, thereby making it possible to easily reduce the size. As described above, the timing of performing the initialization process can be performed at any time, such as when the power is turned on, when the optical disk 10 is inserted, or at predetermined time intervals.

The drive control means, the regulation movement processing means, and the position recognition means have been described as being configured as programs in the control circuit unit. However, for example, the circuits and circuit elements that constitute each of them may be used. In addition, because of the program configuration, it can be easily applied by a simple method of mounting the program on the configuration of the conventional disk device, and the improvement of manufacturability and versatility can be easily achieved. As described above, by adopting a configuration in which the program is recorded on the recording medium, the handling of the program is facilitated, and the use can be easily expanded. Further control The circuit section is not limited to the configuration including the drive control unit, the regulation movement processing unit, and the position recognition unit, but may have any configuration such as, for example, including other units such as a clock unit! ,.

In the initialization process, the step-out has been described, but this is not a limitation. That is, as a configuration for moving the information processing unit 240, a force configured to rotate the lead screw 232A with which the movement restricting claw 241B of the information processing unit 240 is engaged, for example, by using an endless belt or the like, Either of the configurations, such as a configuration in which the information processing unit 240 is moved, and a configuration in which the information processing unit 240 is moved in each configuration can be applied by microstep control.

[0064] In addition, specific structures and procedures for implementing the present invention can be appropriately changed to other structures or the like as long as the object of the present invention can be achieved.

[Effects of the Embodiment]

As described above, the pickup 242 is moved by the micro-step control so as to move in the entire movable range W and is brought into contact with the step portion 212, and the position of the contacted pickup 242 is set within the movable range W. Recognize it as the end position in the movement direction when moving. For this reason, during the initialization process in which the pickup 242 comes into contact with the stepped portion 212 that regulates movement to recognize the position of the pickup 242, the state force at which the pickup 242 comes into contact with the stepped portion 212 and loses synchronism is also supplied. Vibration caused by the driving pulse can be greatly reduced, good silence can be achieved, and the position of information processing can be well recognized.

Industrial applicability

The present invention recognizes a position of an information processing unit that performs at least one of a reading process of reading information recorded on a recording surface of a recording medium and a recording process of recording the information on the recording surface. The present invention can be used for an initialization device, a method, a program, a recording medium on which the program is recorded, and an information processing device.

Claims

The scope of the claims

[1] The movable range is restricted by the restricting means, the driving means drives the driving means to move within the movable range, reads the information recorded on the recording surface of the recording medium, and reads the information on the recording surface. An initialization device that recognizes a position of an information processing unit that performs at least one of a recording process of recording

Drive control means for controlling the drive state of the drive means,

A regulation movement process in which the drive control means controls the driving of the drive means in a micro-step by the drive control means in a time period in which the information processing unit can substantially move the entire movable range, and the information processing unit is brought into contact with the regulation means. Means,

Upon recognizing the completion of the control for moving the information processing unit performed by the restricted movement processing means, a position at which the position of the information processing unit is recognized as an end position in the movement direction during the movement within the movable range. Recognition means;

An initialization device characterized by comprising:

[2] The initialization apparatus according to claim 1, wherein

The regulation movement processing means includes a process of supplying a drive panel having a microstep operating frequency to the drive means by the drive control means with the number of pulses necessary for the information processing unit to move the entire movable range. Do

An initialization device characterized in that:

[3] The initialization device according to claim 1 or claim 2,

The regulation movement processing means controls the information processing unit to move the information processing unit to a side opposite to at least one of the reading processing and the recording processing, and to a side opposite to a standby position for execution. Let it be implemented

An initialization device characterized in that:

[4] The movable range is regulated by the regulating means, and is moved within the movable range by the driving of the driving means, and reading processing for reading information recorded on the recording surface of the recording medium and the information is transferred to the recording surface. An initialization device that recognizes a position of an information processing unit that performs at least one of a recording process of recording

The driver can move the entirety of the movable range in a time period during which the information processing unit can substantially move. Initialization setting means for performing micro-step control of step driving and recognizing the position of the information processing unit as an end position in the movement direction during the movement within the movable range.

An initialization device characterized in that:

[5] A reading process for reading information recorded on the recording surface of the recording medium by moving the movable range within the movable range by the driving of the driving unit, and controlling the movable range by the regulating unit by the arithmetic unit. An initialization method for recognizing a position of an information processing unit that performs at least one of a recording process of recording the information on a recording surface,

The calculating means moves the drive of the driving means by micro-step control during a time when the information processing section is substantially movable in the entire movable range, and causes the information processing section to contact the regulating means,

Recognize the position of the information processing section in contact with the restricting means as an end position in the movement direction during the movement within the movable range.

An initialization method characterized in that:

[6] An initialization program characterized by causing the arithmetic means to function as the initialization device according to any one of claims 1 and 4.

[7] causing the arithmetic means to execute the initialization method according to claim 5

An initialization program characterized by the following.

[8] A recording medium recording an initialization program, characterized in that the initialization program according to claim 6 or 7 is readablely recorded on a calculation means.

[9] an information processing unit that performs at least one of a reading process of reading information recorded on a recording surface of a recording medium and a recording process of recording the information on the recording surface,

Driving means for moving the information processing unit along the recording surface;

Regulating means for regulating a movable range of the information processing section moved by driving of the driving means;

The driving of the driving means is microstep-controlled in a time period in which the information processing unit can substantially move the entire movable range, and the position of the information processing unit is set in the movable range. Initialization setting means for recognizing an end position in the moving direction in the inside,

An information processing apparatus comprising:

[10] an information processing unit that performs at least one of a reading process of reading information recorded on a recording surface of a recording medium and a recording process of recording the information on the recording surface;

The initialization device according to any one of claims 1 to 4, wherein the initialization device recognizes the position of the information processing unit by controlling the driving of the driving unit.

An information processing apparatus comprising:

[11] The information processing device according to claim 9 or claim 10, wherein

The driving unit includes a stepping motor

An information processing apparatus characterized by the above-mentioned.

[12] The information processing apparatus according to any one of claims 9 and 11,

The recording medium is a disk-shaped recording medium that is detachably mounted,

A case body having an opening through which the disc-shaped recording medium is taken in and out, and a shaft support portion for supporting the disc-shaped recording medium at one end, the information processing section being movably arranged, And a pedestal portion disposed in the case so that the one end portion is rotatable in the axial direction of the shaft support portion when the shape recording medium is detached.

The drive control unit is configured to control the pedestal unit when the information processing unit moves the information processing unit by micro-step control to drive the drive unit for a substantially movable time in the entire movable range. Control to move to one end

An information processing apparatus characterized by the above-mentioned.