JP4553205B2 - Detection method of disc transport abnormality - Google Patents

Description

  The present invention relates to a disk device capable of reproducing and recording a disk such as a CD (compact disk) or a DVD (digital versatile disk), and in particular, a disk conveyance abnormality detection method for a disk device capable of storing a plurality of disks. About.

  The in-vehicle changer type disk device capable of storing a plurality of disks loads (conveys) the disk inserted from the disk insertion slot into the housing by the transfer unit, and the loaded disk is moved in the thickness direction of the disk. It is stored in the trays stacked on each other. The disc selected from the plurality of trays is chucked by the drive unit, and then rotated and read from or recorded on the disc by the optical pickup.

  In the case of an in-vehicle disk device, since the space for mounting it is limited, it is desirable to make it as small as possible. In order to meet such a demand, as shown in FIG. 8, the disk transport device of Patent Document 1 includes transport rollers 12 and 13 that transport the disk in contact with the disk, a motor 14 that rotationally drives the transport rollers 12 and 13, A swing support member 17 that rotatably supports one end side of the transport rollers 12 and 13 by a vertical axis 16 and swings the transport roller in a plane parallel to the disk, and a rotation provided on the other end side of the transport roller. Self-running rollers 18, 19; guide plate 20 for guiding the self-running of the rotating self-running roller; and stopper pins 22, 23 provided at both ends of the guide plate for regulating the self-running position of the rotating self-running roller. I have. The same drive source and transport roller are used to enable transport from the disk insertion and ejection position to the playback position, thereby reducing the size and space of the apparatus.

JP 2001-101745 A

  However, the conventional disk device has the following problems. FIG. 9 shows a disk storage unit mounted inside the housing of the disk device. The disk storage unit 30 includes a plurality of plate-like trays 32 for storing a plurality of disks in the thickness direction. Each tray 32 is rotatably held at its end by three unequal pitch screws 34.

  FIG. 10A shows an unequal pitch screw. The unequal pitch screw 34 is formed with a spiral groove 36 that engages with a fulcrum of each tray. Each groove is engaged with a fulcrum 38 of each tray (the tray fulcrum for 6 trays is indicated by a circle in the figure) for each rotation, and the screw 34 is rotated forward or backward to reverse the tray fulcrum. 38 slides in the groove 36 so that the tray is raised or lowered. Further, the unequal pitch screw 34 has a narrow groove pitch (interval) for each rotation on the upper and lower sides of the shaft, and on the other hand, the interval is wide at the center. The tray located at the center is a tray that is selected for reproduction or writing, and the space is increased to provide a space for the drive unit to enter below the tray. The drive unit has functions such as disk chucking and rotational drive of the disk.

  FIGS. 10B and 10C are enlarged views of the groove at the center of the unequal pitch screw. A flat portion 40 consisting of a fixed region is formed in the central groove 36a. When the unequal pitch screw 34 is stopped, the tray fulcrum 38 is designed to stop at the flat portion 40 as shown in FIG. This is to keep the height of the selected tray at the normal position P1. However, if the selected tray fulcrum 38 is positioned at the limit of the flat portion 40 and a disturbance such as vibration is applied thereto, the tray fulcrum 38 is flat as shown in FIG. As a result, the tray slides down from the portion 40, and the tray height P2 becomes lower than the normal position P1.

  As shown in FIG. 11, each tray is provided with a tray claw 50 that is rotatably supported by a shaft 52. When the disc is being transported, that is, when the disc is not mounted on the tray, one end 54 of the tray pawl 50 is positioned within the photosensor 56, and as shown in FIG. The light from is blocked. The other end 60 of the tray pawl 50 protrudes inward from the boundary G of the tray 30. When the disc is loaded on the tray, the outer edge of the disc pushes the other end 60 forward, and the tray pawl 50 Rotate in the direction of arrow R. As a result, one end 54 is detached from the photosensor 56, the light from the light emitting element 58 is received by the light receiving element 62, and the completion of the disc conveyance is detected.

  In a normal state where the tray fulcrum 38 is in the flat portion 40 of the groove 36a, the photosensor 56 is shielded from light if no disk is mounted. However, as described above, the tray fulcrum 38 is located in the groove 36a due to vibration or the like. In the state of falling from the flat portion 40, one end portion 54 of the tray claw 50 is lowered, and as a result, as shown in FIG. 11 (c), the light from the light emitting element 58 is not blocked and enters the light receiving element 62. Will reach. As a result, it is considered that the transport of the disc is completed even though the transport of the disc is not completed.

  Further, the groove 36 of the unequal pitch screw is formed in a size having a certain margin with respect to the size of the tray fulcrum 38 so as not to be a load for raising and lowering the tray. Therefore, even when the tray fulcrum 38 is normally positioned on the flat portion 40, fluttering occurs in a vibration environment, and light is transmitted through the photosensor 56 in the same manner as when the tray fulcrum slides off the flat portion. There is a possibility that.

  As described above, when the photosensor 56 is light-transmitted, even if the disk has not actually reached the load end, it is considered that the disk has been transported, and the disk cannot be centered. Nevertheless, it shifts to the chucking operation, which is the next operation, and causes a chucking mistake.

  The chucking process is an extension of a series of operations of the drive unit, and the completion of chucking is determined only by a change in the mechanical position of the drive unit. That is, if the drive unit moves to the specified position, it is considered that the disk chucking operation has been completed. Further, since it is not possible to directly confirm whether or not the disk has been actually chucked, the determination is made indirectly based on the positional relationship of the mechanical mechanism.

  After completion of the chucking operation, chucking confirmation processing by spindle rotation is performed in order to confirm whether or not chucking is normally performed. If the spindle does not rotate, it is determined as normal chucking, and if it rotates, it is determined as abnormal chucking. However, even if the disc transport is not normally performed as described above, if the disc and the spindle are pressed and the load is high and the spindle does not rotate, it is determined that the chucking is normal even in this confirmation process. As a result, it is recognized that the disk loading is normally completed.

  Even if the disc loading process is deemed complete, it cannot be reproduced as long as it is not chucked. Also, the disc change operation to another tray cannot be performed, resulting in an error. Further, during the reproducing operation in a state where the chucking of the disk has failed, only the spindle is idled, and there is a possibility that the recording surface of the user's disk may be damaged. Furthermore, in the case of a changer type disk device, if the disk is rotated by the drive unit in a state where chucking is not normal, an unsupported disk falls from the tray or the disk tilts, and the subsequent operation is performed. There was also a risk of serious failure that could not be continued.

  Accordingly, the present invention provides a disk device that solves the above-described conventional problems and can reliably determine whether or not the disk has been transported normally, and prevents loading errors, chucking errors, disk dropping, and the like. The purpose is to do.

  In the disk device according to the present invention, one end is rotatably supported, and the first position facing the disk insertion slot or the disk storage section in the housing is rotated by rotating around the one end. 2, a transfer unit having a transfer roller for transporting the disc, a drive unit capable of rotating the disc in the disc storage section, and a disc in the vicinity of the disc insertion slot. When the first disk detecting means and the transfer unit are in the first position and the disk is detected by the first disk detecting means, the transfer roller is rotated and the transfer unit is A disc is mounted on the tray of the disc storage unit and a first moving means that rotates around one end and moves from the first position to the second position. A second disk detecting means for detecting whether or not the disk has been loaded; a chucking means for chucking the disk by the drive unit when the second disk detecting means detects the loading of the disk; And determining means for determining whether or not the disk has been normally transported based on the detection result of the first disk detecting means.

  Preferably, the first detection means is mounted on the transfer unit, and includes second moving means for moving the transfer unit from the second position to the first position after completion of chucking. The determination unit determines that there is an abnormality in the conveyance of the disc when the first detection unit detects the disc after completion of chucking. The disc apparatus further includes re-conveying means for ejecting the disk once by the transfer unit and conveying the disk again when the judging means judges that the disc transport is abnormal.

  Furthermore, in the disk transport abnormality detection method of the disk device according to the present invention, a first detection step for detecting a disk in the vicinity of the disk insertion slot, and the rotation of the transfer roller when the disk is detected by the first detection step. A first moving step in which the transfer unit is rotated around the one end and moved from the first position toward the second position, and a disk is mounted on the tray of the disk storage section. A second detection step for detecting whether or not a disc is loaded on the tray; a step for chucking the disc by the drive unit when the loading of the disc is detected by the second detection step; After completion, move the transfer unit from the second position to the first position, and check whether there is a disk near the disk insertion slot. A third detection step of leaving, when the disc is detected by the third detection step, and a determining that the transport disk is abnormal.

  Preferably, the method includes a step of ejecting the disk by the transfer unit and a step of re-transporting the ejected disk by the transfer unit when it is determined that the conveyance of the disk is abnormal. In addition, when the re-transport of the disk reaches a predetermined number of times, there is a step of stopping the re-transport of the disk and processing a transport error.

  According to the disk device of the present invention, after the disk is transferred by the transfer unit and the chucking is completed, the presence or absence of the disk is detected in the vicinity of the disk insertion slot, so that a disk that should not be present was detected. In this case, it is possible to reliably determine an abnormality in the disk conveyance. If it is determined that there is an abnormality in the disk conveyance, it is possible to recover from the abnormality in the disk conveyance by temporarily ejecting the disk and reloading the disk again.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a plan view showing the inside of a disk device according to an embodiment of the present invention, and shows a state in which a lower surface of a housing of the disk device is removed. The disk device of this embodiment is an in-dash type disk storage type for vehicle use, and the housing has a so-called 1DIN or 2DIN size. The disk device 100 includes a transport unit 200 that transports a disk, a drive unit 300 that performs chucking and rotation of the disk, and a disk storage unit 30 that stores a plurality of disks.

  A slit-like disc insertion opening 104 having a width W is formed on the front surface 102 of the housing. Preferably, the disc insertion opening 104 is opened and closed by a shutter. A transfer unit 200 is disposed in the vicinity of the disc insertion opening 104. One end of the transfer unit 200 is rotatably supported by a shaft 202, and when the transfer unit is rotated around the shaft 202, the other end moves so as to draw an arcuate locus. .

FIG. 2 is a perspective view showing details of the transfer unit. A shaft 202 and a plurality of gear trains 210 are attached to one end of the transfer unit 200. The gear train 210 is coupled to a drive motor (not shown), and one gear of the gear train 210 is coupled to the roller shaft 212. A pair of transfer rollers 214 are attached to both ends of the roller shaft 212. A sliding member 216 is provided so as to form a certain gap with the transfer roller 214. This gap is consistent with the disk insertion port 104, the disk is ejected from the disk insertion port 104 inserted disc or the disc insertion port 104, is by a transfer roller 214 while being held in the sliding member 216 and the transfer roller 214 Be transported. In addition, as shown in FIG. 1, the transfer unit 200 is provided with two sets of insertion port photosensors 220 and 222. The insertion port photosensors 220 and 222 include a light emitting element and a light receiving element, and the light emitting element and the light receiving element are disposed so as to straddle the gap between the transfer roller 214 and the sliding member 216. When a disk is present in this gap or in the disk insertion port 104, light from the light emitting element to the light receiving element is blocked by the disk, and the disk is detected.

  As shown in FIG. 1, the transfer unit 200 waits for the insertion of the disc or when the disc is transported and the disc is reproduced, as shown in FIG. It is in a position parallel to the mouth 104. When the disk is transported to the disk storage unit 30, the transfer unit 200 rotates about the shaft 202 at one end as shown in FIG. 3 until the disk can be loaded on the selected tray. Moved. Note that the transfer roller 214 is also rotated when the disk is transported.

  As shown in FIG. 1, the drive unit 300 is disposed on the side of the housing. The drive unit 300 includes an elongated base 302, and one end of the drive unit 300 is rotatably supported by a shaft 304. A rotation drive unit is provided at the other end of the base 302. The rotation driving unit includes a spindle motor supported by the base 302 and a turntable 308 fixed to the rotation shaft 306 of the spindle motor. Although not shown in FIG. 1, the base 302 is provided with an optical head. The drive unit 300 is in the retracted position as shown in FIG. 1 when the disk is not reproduced or written, but when the disk is reproduced or written, the drive unit 300 is centered on the shaft 304 as shown in FIG. 3 or FIG. The disk D is rotated, the disk D is chucked by the turntable 308, or the disk D is rotated.

  As shown in FIGS. 1 and 9, the disk storage unit 30 includes a plurality of fan-shaped trays 32. Each tray 32 is rotatably supported by an unequal pitch screw 34 at three locations on the outer edge. As described in the prior art, each tray 30 is provided with a tray claw 50 (see FIG. 11). When a disc is mounted on the tray, the outer edge of the disc rotates the tray claw 50, It is detected by the photo sensor 56. Each tray 32 is raised or lowered by rotating the unequal pitch screw 34, and the space between the screw grooves 36a in the central portion is large, and the tray there is greatly separated from the adjacent lower tray, and the drive unit is placed in that space. 300 can enter.

  FIG. 4 shows the position of each part when the disk is being reproduced or written. When the transport unit 200 finishes transporting the disk, the transport unit 200 returns to the original position facing the disk insertion slot 104. After chucking the disk, the drive unit 300 descends from that position and rotates the disk in a damper-free state.

  FIG. 5 is a block diagram showing a configuration for controlling each part of the audio apparatus. The control unit 500 is composed of, for example, a microcomputer, stores control sequence software in a memory such as a RAM / ROM, and controls the operation of each unit according to the software. The control unit 500 responds to the detection results of the insertion port photosensors 220 and 222 and the photosensor 56 for tray nail detection and the output of the input unit 540 that receives input from the user to the motors 510, 520, and 530. A drive control signal is output. The motor 510 rotates the transfer unit 200 and the transfer roller 214. The motor 520 performs rotation of the drive unit 300 around the shaft 304, vertical movement of the drive unit 300, rotation of the spindle motor, and the like. The motor 530 rotates the unequal pitch screw 34 of the disk storage unit 30.

  Next, the disk loading operation in the disk apparatus of this embodiment will be described with reference to the flowchart of FIG. First, the disk device 100 is in a waiting state for loading (step S101). At this time, the transfer unit 200 is at a position facing the disc insertion slot 104 as shown in FIG. When a disk insertion instruction is input from the input unit 540, the shutter is opened and the disk insertion port 104 is exposed. When a disc is inserted from the disc insertion slot 104, the outer edge of the disc reaches the gap between the transfer roller 214 and the sliding member 216 of the transfer unit, and the disc is detected by one of the insertion port photosensors 220 and 222. The detection result is output to the control unit 500. In response to this, the controller 500 starts the rotation of the transfer roller 214 of the transfer unit 200 (step S102). At this point, the disk transport process is started.

  When the transport process is started, the control unit 500 starts rotating the transfer unit 200 around the shaft 202 and rotates the transfer unit 200 to a position facing the disk storage unit 30. The disk conveyed by the transfer unit 200 is mounted on the tray 32 located at the center of the disk storage unit 30. When the outer edge of the disk rotates the tray pawl 50, the photo sensor 56 enters a light-shielding state, and the completion of the disk conveyance is detected. In response to this, the controller 500 stops the rotation of the transfer roller 214.

  Next, the control unit 500 performs a chucking process (step S103). The controller 500 rotates the drive unit 300 around the shaft 304, positions the turntable 308 of the drive unit 300, and then raises the drive unit 300. As a result, the turntable 308 is inserted into the hole in the center of the disc, and chucking is performed.

  Next, the control unit 500 performs a chucking confirmation process (step S104). The confirmation of chucking is performed according to the flow shown in FIG. When chucking is performed by the drive unit 300 (step S201), a chucking switch (not shown) is detected (step S202). When the switch is detected, the control unit 500 considers that the chucking is completed, and then drives the spindle motor to rotate the disk (step S203). This rotation is performed for about 100 ms (step S204), and the spindle motor is stopped (step S205). The controller 500 detects an FG value that is an index of the rotation speed of the spindle motor (step S206). When the disk is chucked, the disk is sandwiched between pressing members (not shown). Therefore, if the chucking is normal, the spindle motor does not rotate due to the crimping load, and the FG value is not detected. Therefore, if the FG value is not detected, the control unit 500 regards it as normal chucking (step S207). On the other hand, if the FG value is detected, it is regarded as a chucking abnormality (step S208).

  When it is determined that the chucking is normal by the above chucking confirmation processing, the control unit 500 rotates the transfer unit 200 and returns the transfer unit to the original position, that is, the position facing the disc insertion slot 104 (step S105). ). On the other hand, when it is determined that the chucking is abnormal, the control unit 500 regards the disk as a deformed disk and performs a disk ejection process (step S106).

  Next, the controller 500 detects the presence / absence of a disk by the insertion port photosensors 220 and 222 of the transfer unit 200 returned to the original position (step S107). If neither of the insertion port photosensors 220 and 222 detects the disc, the control unit 500 determines that the disc loading has been performed normally, closes the shutter of the disc insertion port 104 (step S108), and then The drive unit 300 is lowered from the chucked position, and the disc is rotated in a free state, so that the disc can be reproduced (step S109).

  On the other hand, when any of the insertion port photosensors 220 and 222 detects a disk, the control unit 500 determines that the conveyance is abnormal. That is, if the disc is completely mounted on the tray, the disc will not be positioned near the disc insertion slot. In such a situation, when a disturbance such as vibration occurs, the tray fulcrum falls from the flat portion 40 of the groove 36a of the unequal pitch screw, and the photosensor 56 becomes in a light-transmitting state by mistake, during loading, or Occurs when loading of a disc is considered complete when loading is not successful.

  When it is determined that the loading is abnormal, the control unit 500 executes a disk ejection process (step S110). The control unit 500 rotates the transfer roller 214 of the transfer unit 200 and ejects the disk approaching the disk insertion port 104. Next, the controller 500 checks the number of loading retries. If the predetermined number of retries has not been reached, the controller 500 starts the re-conveying process for the ejected disc again (step S102). On the other hand, if the number of retries has been reached, the conveyance is terminated as a loading error. As the number of retries, for example, every time a disk is loaded, “1” can be added to the internal counter, and the addition result can be held in a register or the like.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments according to the present invention, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  In the above embodiment, the disk storage type disk device is illustrated, but it is not necessarily required to be the storage type. Moreover, although the example which provides an insertion port photosensor in a transfer unit was shown, the insertion port photosensor may be provided in a housing | casing. In the above example, two insertion port photosensors are used, but a single one may be used. Further, the detection mechanism of the disk mounted on the tray is not necessarily limited to the combination of the tray claw and the photo sensor.

  INDUSTRIAL APPLICABILITY The present invention is used in a disk device that can reproduce data recorded on a disk such as a CD and a DVD, or write data to the disk, and in particular, is used in an in-vehicle audio / video device.

It is a top view which shows the internal structure of the disc apparatus based on the Example of this invention. It is a fragmentary perspective view which shows the detail of a transfer unit. It is a figure which shows the state which the transfer unit rotated toward the disk storage part. It is a figure which shows a state when a drive unit rotationally drives a disk. It is a block diagram which shows the structure for controlling each part of a disk apparatus. It is a flowchart which shows the disk loading operation | movement of a disk apparatus. It is a flowchart which shows the operation | movement which a disk chuck | zipper confirms. It is a top view which shows the conventional disc apparatus. It is a perspective view which shows the disk storage part of a disk apparatus. It is a figure which shows an unequal pitch screw. It is a figure explaining operation | movement of a tray nail | claw.

Explanation of symbols

30: Disc storage part 32: Tray 34: Unequal pitch screw 36: Groove 38: Tray fulcrum 40: Flat part 50: Tray claw 52: Shaft 54: One end 56: Photo sensor 58: Light emitting element 60: The other End 62: Light receiving element 100: Disk device 102: Front surface of housing 104: Disk insertion port 200: Transfer unit 202: Shaft 210: Gear train 212: Roller shaft 214: Transfer roller 216: Sliding members 220, 222: Insertion Mouth photosensor 300: drive unit 302: base 304: shaft 306: rotating shaft 308: turntable D: disk

Claims (7)

One end is rotatably supported, and can be moved to a first position facing the disk insertion slot or a second position facing the disk storage section in the housing by rotating around the one end. And a disk unit having a transfer unit having a transfer roller for conveying the disk, and a drive unit capable of rotating the disk in the disk storage unit,
First disk detection means mounted on the transfer unit for detecting whether there is a disk;
When the transfer unit is in the first position, when the disc is detected by the first disc detecting means, it is rotated around the one end portion of the transfer unit to rotate the said transport roller, first from position and first moving means for enabling mounting the second toward the position is moved disc in the tray that is selected in the disc storage portion in Rukoto,
Second disk detecting means for detecting whether or not a disk is mounted on a selected tray of the disk storage unit;
Chucking means for chucking the disk by the drive unit when loading of the disk is detected by the second disk detection means;
Confirmation means for confirming whether or not chucking has been normally performed by determining whether or not the disk rotates via the drive unit;
A second moving means for rotating the transfer unit around the one end and moving from the second position toward the first position when chucking is confirmed to be normal by the confirmation means;
In the state where the transfer unit is made to wait at the first position by the second moving means, the first disk detecting means detects the presence or absence of a disk, and when the disk is not detected, the disk is normally conveyed. Determining means for determining that the disk has been detected and determining that there is an abnormality in the conveyance of the disk when the disk is detected;
A disk device having 2. The disk apparatus according to claim 1 , further comprising a re-conveying means for ejecting the disk once by the transfer unit and transporting the disk again when the judging means judges that the disk transportation is abnormal. The disk device according to claim 2 , wherein the re-transport unit ends the re-transport of the disk when the re-transport of the disk reaches a predetermined number of times. The drive unit is disposed on a side portion of the casing, and one end portion is rotatably supported. The other end portion includes a spindle motor and a turntable fixed to the rotation shaft of the spindle motor. A rotational drive unit including,
The chucking means rotates the drive unit located on a side portion of the housing around the one end portion, and rotates a disk mounted on a tray selected by the rotation driving unit. 3. The disk device according to any one of 3. One end is rotatably supported, and can be moved to a first position facing the disk insertion slot or a second position facing the disk storage section in the housing by rotating around the one end. And a disk transport abnormality detection method for a disk device having a transport unit having a transport roller for transporting the disk and a drive unit capable of rotating the disk in the disk storage unit,
A first detection step of detecting the presence or absence of a disk by a disk detection means provided in the transfer unit when the transfer unit is in the first position ;
When the disc is detected by the first detection step, the moving the transport roller is rotated by rotating around the end of the transfer unit the one, toward the first position to the second position 1 movement step;
Loading the disc onto the selected tray of the disc compartment;
A second detection step for detecting whether or not a disc is mounted on the selected tray;
A step of chucking the disc by the drive unit when loading of the disc is detected by the second detection step;
Checking whether or not the chucking has been normally performed depending on whether or not the disk rotates via the drive unit;
When chucking is confirmed to be normal, the steps Before moving from the second position rotated about the end portion of the transfer unit and the one to the first position,
A third detection step of detecting the presence or absence of a disk by the disk detection means in a state where the transfer unit is in a standby state at a first position ;
Determining that the disc has been transported normally if no disc is detected in the third detection step, and determining that there is an abnormality in the transport of the disc if a disc has been detected;
A conveyance abnormality detection method comprising: 6. The conveyance abnormality detection method according to claim 5 , comprising a step of ejecting the disk by the transfer unit and a step of re-conveying the ejected disk by the transfer unit when it is determined that the conveyance of the disk is abnormal. The conveyance abnormality detection method according to claim 6 , further comprising a step of stopping the re-carrying of the disk and processing a conveyance error when the re-carrying of the disk reaches a predetermined number of times.

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