JP2010250877A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device that improves costs/durability while reducing an influence of electrostatic discharge. <P>SOLUTION: Ribs are formed on the lower surface of a disk tray. On the chassis side, a switch (lock detection part) and a switch (eject request detection part) facing the ribs are provided. When the switch (eject request detection part) is turned on after the switch (lock detection part) is turned on, the device is temporarily on standby until the switches are turned off. In the other cases, when the switches are turned on, the disk tray is ejected and a lock claw is released by an eject plunger. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical disk apparatus, and is suitable for application to an optical disk apparatus that detects a disk tray discharge request, for example.

  2. Description of the Related Art Conventionally, in a thin optical disk device mounted on a notebook personal computer, a discharge switch is provided on the outer surface of the disk tray, and the disk tray can be discharged by pressing this switch. Has been made.

  However, when the discharge switch is provided on the outer surface of the disc tray in this way, when the user presses the discharge switch, electrostatic discharge (ESD) from the user is applied to the control board inside the optical disc apparatus via the switch and the cable. There is a possibility that the optical disk apparatus malfunctions due to the transmission.

Conventionally, as a means for reducing the influence of such electrostatic discharge, a discharge switch is disposed on a control board inside the optical disc apparatus, and a bar-like member is exposed from the outer surface of the disc tray, and the other end is a disc. There has been proposed a light disk device that is disposed so as to be in contact with a discharge switch in a state where the tray is closed, and that allows a user to operate the discharge switch via this bar-shaped component (see Patent Document 1).
JP 2002-367262 A

  However, in such an optical disk apparatus, since the rod-like parts that are physically movable parts are disposed inside the apparatus, the structure becomes complicated and there is room for improvement in terms of cost and durability.

  The present invention has been made in consideration of the above points, and an object of the present invention is to propose an optical disc apparatus capable of reducing the influence of electrostatic discharge and improving cost and durability.

  In order to solve such a problem, in the present invention, in an optical disc apparatus, a base, a disc tray that moves between a maximum insertion position accommodated in the base and a discharge position discharged from the base, and the vicinity of the maximum insertion position A lock mechanism for locking the disc tray with respect to the base body, a lock detection unit for detecting that the disc tray is stored to the lock position, and the disc tray at the lock position and the maximum entry position. A discharge request detection unit for detecting that the storage unit is in the middle and a release unit for releasing the lock by the lock mechanism are provided.

  ADVANTAGE OF THE INVENTION According to this invention, the optical disk apparatus which can reduce the influence by the electrostatic discharge in an optical disk apparatus and can improve cost and durability is realizable.

  Hereinafter, an embodiment of the present invention will be described in detail.

  FIG. 1 shows a configuration of an optical disc apparatus according to the present embodiment. This optical disk apparatus is of a thin shape mounted on a notebook personal computer, a small desktop personal computer, etc., and has a chassis (base) 1, a disk tray 20 on which an optical disk is placed, and these chassis. 1 and a top cover (not shown) that covers the disc tray 20.

  A pair of guide rails 2 are attached to the inner surface of the chassis 1 so as to be parallel to the insertion / ejection direction of the disk tray 20 and sandwich the disk tray 20. Inside each guide rail 2, a guide rail 3 having a U-shaped cross section for sliding the disk tray 20 with respect to the chassis 1 is slidably attached to the guide rail 2. Further, a pin 5 for locking the disc tray 20 to the chassis 1 by a lock claw 28 provided on the disc tray 20 is provided near the guide rail 2 of the chassis 1.

  A substrate 10 is disposed inside the chassis 1. A switch 11, a switch 12 and a switch 13 for detecting the positional relationship of the disk tray 20 with respect to the chassis 1, and an optical pickup 23 are connected to the substrate 10 with a flexible cable. Electronic components such as a connector 14 for connecting to a circuit in the disk tray 20 via a connector, a connector 15 for connecting the optical disk apparatus to an external device, and an IC (integrated circuit) 19 constituting a control circuit and the like Has been implemented.

  On the other hand, the disc tray 20 has a concave disc mounting portion 20 a formed on the upper surface thereof and a groove portion 20 b provided on the side surface. The groove portion 20 b and the lower surface of the disc tray 20 are U-shaped. It is slidably held between the shaped parts. As a result, the disc tray 20 can be slid along the guide rail 2 in the insertion / ejection direction.

  The disc tray 20 is provided with a clamper portion 21 for fixing the optical disc. The clamper portion 21 can be driven to rotate by a disc motor 22. Further, the disk tray 20 is provided with a pickup 23 for reading a signal recorded on the optical disk, and the pickup 23 can be moved in the radial direction of the optical disk by a pickup driving unit 24.

  Ribs 25 and 26 for detecting the positional relationship of the disk tray 20 with respect to the chassis 1 are provided on the lower surface of the disk tray 20. The rib 25 corresponds to the switch 11 and the switch 12, and the rib 26 corresponds to the switch 13. Although the detailed positional relationship between the rib 26 and the switch 13 will be described later, in the present embodiment, the positions of the rib 25 and the rib 26 are detected by the switches 11 to 13, and the detection result indicates that the chassis 1 and the disk tray 20 are connected. The positional relationship can be detected.

  The disk tray 20 is provided with a lock claw 28 that rotates around an axis and can engage with the pin 5 on the chassis 1 side. The lock pawl 28 is shown larger than the actual size. Further, the lock claw 28 is urged in a direction protruding from the side surface of the disc tray 20 to the pin 5 side by a spring or the like (not shown). Further, a discharge plunger 27 is attached to the disc tray 20 for rotating the lock claw 28 in the direction opposite to that of the pin 5 and releasing the engagement with the pin 5. The discharge plunger 27 is constituted by an electromagnetic solenoid, for example, but may be constituted by a motor or the like.

  FIG. 2 shows the configuration of the control system of the optical disc apparatus constituted by the IC 19 or the like. The optical disk apparatus includes a system controller 51 that controls operation of the entire apparatus, a servo control unit 52 that performs servo control according to control from the system controller 51, a disk motor 22 according to control from the servo control unit 52, and A motor driver 53 that drives a sled motor 24 a constituting the pickup driving unit 24 and a signal processing unit 54 that processes a reproduction signal from the pickup 23 are provided. Recording tracks are formed in the circumferential direction of the optical disc 9, the signal processing unit 54 extracts a tracking signal from the reproduction output of the pickup 23, and the servo control unit 52 responds to the tracking signal from the signal processing unit 54. Then, the motor driver 53 is driven to make the position of the pickup 23 follow the recording track.

  The optical disc apparatus also includes a laser driver 55 that drives the laser light source of the pickup 23 according to control from the signal processing unit 54, a data processing unit 56 that extracts recording data from the output of the signal processing unit 54, and the like. And an interface controller 57 for inputting / outputting data to / from an external device such as a personal computer. The signal processing unit 54 extracts the reproduction signal of the recording track from the reproduction output of the pickup 23. The data processing unit 56 reproduces data from the reproduction signal of the recording track. The reproduced data is supplied to an external device via the interface controller 57 under the control of the system controller 51.

  Further, the system controller 51 detects the positional relationship between the disk tray 20 and the chassis 1 according to the detection results of the switches 11, 12, and 13, and determines the storage state of the disk tray 20 according to the detection results. And controls the operation of the entire apparatus.

  FIG. 3 shows a state where the disc tray 20 is located at the discharge position. When the disc tray 20 is stored in the chassis 1, the disc tray 20 is biased by a biasing portion 20 c that protrudes from the rear surface side of the chassis 1 of the disc tray 20, so that the disc tray 20 is locked in the chassis 1. When the engagement between the pin 5 of the chassis 1 and the lock claw 28 of the disk tray 20 is released in the state (FIGS. 6 and 7), the disk tray 20 is ejected from the chassis 1 by the urging force of the urging portion 20c. FIG. 3 shows a state in which the ejected disk tray 20 is pulled out to the maximum.

  FIG. 4 shows the positional relationship of the rib 25, the rib 26, the switch 11, the switch 12, and the switch 13 as viewed from the rear surface side (A direction in FIG. 3) of the chassis 1 at this discharge position. The disk tray 20 slides in a direction perpendicular to the paper surface of FIG. 4. The state of the switch 11 and the switch 12 is switched by the rib 25 according to the slide position, and the state of the switch 13 is switched by the rib 25. It is designed to switch.

  FIG. 5 shows the positional relationship among the rib 25, the rib 26, the switch 11, the switch 12, and the switch 13 as viewed from the side of the chassis 1 in the discharging position (direction B in FIG. 3). The disc tray 20 slides in the left-right direction in FIG. At this discharge position, the rib 25 and the rib 26 are located away from the switch 11, the switch 12, and the switch 13, so that the switches 11 to 13 are all in an off state.

  FIG. 6 shows a state in which the disk tray 20 is housed in the chassis 1 and the pins 5 of the chassis 1 and the lock claws 28 of the disk tray 20 are engaged. In the following, the position of the disk tray 20 where the pin 5 of the chassis 1 and the lock claw 28 of the disk tray 20 are engaged in this way (that is, the position of the disk tray 20 in the normal state housed in the chassis 1) will be described. As appropriate, this is called the lock position. 7 shows the positional relationship of the rib 25, the rib 26, the switch 11, the switch 12, and the switch 13 as viewed from the side of the chassis 1 in the locked position (direction B in FIG. 3). At this position, the switch 11 and the switch 12 are turned on by the rib 25.

  In this locked position, the chassis 1 and the disk tray 20 maintain a certain positional relationship by engaging the locking claw 28 and the pin 5 against the urging by the urging portion 20c. There is some play (for example, about 1 mm) in which the disc tray 20 can be pushed to the maximum insertion position due to the structure of the engagement between the pin 5 and the pin 5. In this embodiment, this play is used to detect an operation of further pushing the disc tray 20 and treat it as a discharge request.

  FIG. 8 shows a state in which the disc tray 20 is pushed from this locked state to an intermediate position (open detection position) of the “play” described above. FIG. 9 shows the positional relationship among the rib 25, the rib 26, the switch 11, the switch 12, and the switch 13 as viewed from the side of the chassis 1 (the B direction in FIG. 3) at the open detection position. In the open detection position, the switch 11 and the switch 12 are turned on by the rib 25, and the switch 13 is turned on by the rib 26, as in the above-described lock position.

  FIG. 10 shows the state of each switch 11, switch 12, and switch 13 at each position described above. Thus, the positional relationship between the switch 13 and the rib 26 is set so that the switch 13 is turned on in the middle of the play at the lock position (play of the lock function including the lock claw 28, the pin 5 and the like). In FIG. 10 and FIG. 3 described above, the length of play is exaggerated from the actual one.

  FIG. 11 is a timing chart showing the state of each part in the storing operation and the discharging operation of the disc tray 20. In the storing operation, when the disk tray 20 is pushed into the chassis 1, the switch 11 and the switch 12 are sequentially turned on. At this time, if the disk tray 20 is pushed in strongly, the switch 13 may be turned on as shown in FIG. In such a case, if it is handled as a discharge request, it becomes difficult to store the disc tray 20. For this reason, the system controller 51 does not handle the discharge request even if the switch 13 is turned on in such a case.

  FIG. 12 is a flowchart showing a process for realizing such an operation. In a state where the disc tray 20 is ejected (a state where the switch 12 is off), the system controller 51 waits for the switch 12 to be turned on (S1). When the disk tray 20 is stored and the switch 12 is turned on, the system controller 51 resets the timer (S2) and monitors whether the switch 13 is turned on (S3).

  If the switch 13 is not turned on, the system controller 51 checks whether or not the timer has become larger than a predetermined value (T: for example, about 2 seconds) (S4), and if it exceeds the predetermined value, the servo controller 52 is instructed to start reading the disc information of the optical disc 9 (S6). If the timer does not exceed the predetermined value, the system controller 51 continues to monitor the switch 13 (S3).

  When the switch 13 is turned on in the above-described step S3, the system controller 51 waits until the switch 13 is turned off (S5). When the switch 13 is turned off, the system controller 51 instructs the servo control unit 52 to turn on the optical disk 9. Reading of the disc information is started (S6).

  By such processing, when the switch 13 is turned on within a predetermined time (T) after the disk tray 20 is accommodated (switch 12 is turned on), the system controller 51 treats this as a discharge request. First, reading of the disc information of the optical disc 9 is started after the switch 13 is turned off. Thereby, the disk tray 20 can be easily stored.

  FIG. 13 is a flowchart showing processing in the discharging operation in FIG. 11 described above. At the time of reproducing the optical disk 9, the system controller 51 waits for the switch 13 to be turned on (S11). When the switch 13 is turned on, the system controller 51 checks whether or not the switch 12 is turned on (S12). If the switch 12 is turned off when the switch 13 is turned on, there is a possibility of noise or the like, so the system controller 51 waits for the switch 13 to be turned on (S11).

  If the switch 12 is on, the system controller 51 waits for the switch 13 to turn off (S13). When the switch 13 is turned off, the system controller 51 instructs the servo controller 52 and the like to stop the reproduction of the optical disk 9 (S14), and when the optical disk 9 stops, instructs the ejection plunger 27 to eject the disk tray 20 ( S15). As a result, when the disk tray 20 is pushed into the chassis 1 at the locked position of the disk tray 20, the system controller 51 can determine that it is a discharge request and discharge the disk tray 20.

  Thus, in the present embodiment, it is possible to detect the discharge request of the disk tray 20 without providing a discharge switch outside the disk tray 20, and to reduce the influence on electrostatic discharge. In this embodiment, since the switch 13 is operated by the rib 26 provided on the lower surface of the disc tray 20, a discharge switch is provided inside the apparatus, and a member for operating the discharge switch is provided from the outside of the apparatus. Compared to the case, the structure can be simplified and the durability can be improved.

  By the way, if only the storage of the disk tray 20 is detected, it can be detected only by the switch 12, and the switch 11 is not necessarily provided, but in the present embodiment, it depends on the state of the switch 11 and the switch 12. Thus, the laser light source of the pickup 23 is controlled.

  Specifically, the system controller 51 shuts off the laser light source of the pickup 23 to the laser driver 55 regardless of the operation of the disk motor 22 or the like when either the switch 11 or the switch 12 is turned off. Let By performing such control, the laser light source of the pickup 23 can be surely shut off even when the disc tray 20 has jumped out of the chassis 1 due to impact or the like.

  In the above-described embodiment, the case where the switch 12 and the switch 13 are arranged on the chassis 1 side and the rib 25 and the rib 26 are provided on the lower surface of the disk tray 20 has been described. However, the present invention is not limited to this. As long as the positional relationship between the chassis 1 and the disc tray 20 can be detected, various other configurations can be widely applied as the configuration for detecting the positional relationship. For example, when a circuit board is provided on the disk tray 20 side, as shown in FIG. 14, ribs 25 and 26 are provided on the inner surface of the chassis 1, and switches 12 and 13 are provided on the lower surface of the disk tray 20. May be. For example, as shown in FIG. 15, a push-type switch 13 that can be pressed by the rear end of the disk tray 20 instead of the rib 26 and the switch 13 may be provided on the chassis 1 side.

  In the above-described embodiment, the case where the switch 12 and the switch 13 are used as the means for detecting the rib 25 and the position of the rib 25 has been described. However, the present invention is not limited to this, and a photo interrupter, etc. Other detection methods may be applied. Further, the shape of the rib 25 and the rib 26 is not limited to the above example, and may be a protrusion / arm shape as long as it can be detected by a switch or the like.

  Furthermore, in the above-described embodiment, the case where the storage of the disk tray 20 is detected by the state of the switch 12 has been described. However, the present invention is not limited to this, and the state of the switch 11 may be used instead of the switch 12. Alternatively, it may be detected that the disc tray 20 is stored when either the switch 11 or the switch 12 is turned on.

  Furthermore, in the above-described embodiment, the case where the lock mechanism of the disc tray 20 is configured by the discharge plunger 27, the lock claw 28, and the pin 5 has been described, but the present invention is not limited to this, and other locks are also provided. A mechanism may be used. Also in this case, since there is play in the locked position mechanically, the discharge request can be detected by the rib 25, the rib 26, the switch 12, the switch 13, and the like as described above.

  Furthermore, in the above-described embodiment, a thin optical disk device used for a notebook personal computer, a small desktop personal computer, or the like has been described as an example. However, the application target of the present invention is not limited to this, For example, the present invention may be used for an optical disk device used for a normal desktop personal computer or the like.

  By providing the discharge switch inside the apparatus, the influence of electrostatic discharge can be reduced, and it can be applied to applications that require operational stability and durability.

1 is a perspective view showing a configuration of an optical disc device according to an embodiment of the present invention. It is a block diagram which shows the structure of the control system of the optical disk apparatus by embodiment of this invention. It is a top view which shows the structure of the optical disk apparatus in the discharge position of a disk tray. It is sectional drawing which shows the structure of the optical disk apparatus in the discharge position of a disk tray. It is sectional drawing which shows the structure of the optical disk apparatus in the discharge position of a disk tray. It is a top view which shows the structure of the optical disk apparatus in the lock position of a disk tray. It is sectional drawing which shows the structure of the optical disk apparatus in the lock position of a disk tray. It is a top view which shows the structure of the optical disk apparatus in an open detection position. It is sectional drawing which shows the structure of the optical disk apparatus in an open detection position. It is a figure which shows the state of a disk tray and each switch. It is a timing chart which shows the state of each switch, etc. in closing operation and discharge operation. It is a flowchart which shows the process sequence at the time of disk tray accommodation. It is a flowchart which shows the process sequence at the time of disk tray discharge | emission. It is a perspective view which shows the structure of the optical disk apparatus by the modification of arrangement | positioning of a rib and a switch. It is a perspective view which shows the structure of the optical disk apparatus by the modification of arrangement | positioning of a rib and a switch.

  DESCRIPTION OF SYMBOLS 1 ... Chassis, 5 ... Pin, 9 ... Optical disk, 12 ... Switch, 13 ... Switch, 20 ... Disc tray, 25 ... Rib, 26 ... Rib, 27 ... Discharge plunger, 28 ... Lock claw, 51 ... System controller, 52 ... Servo controller, 53 ... Motor driver.

Claims (7)

A substrate;
A disc tray that moves between a maximum entry position accommodated in the substrate and a discharge position discharged from the substrate;
A lock mechanism for locking the disc tray to the base in the vicinity of the maximum entry position;
A lock detection unit for detecting that the disk tray is stored to the lock position;
A discharge request detection unit that detects that the disk tray is stored to the middle between the lock position and the maximum insertion position;
An optical disc apparatus comprising: a release unit that releases the lock by the lock mechanism. After the storage of the disc tray is detected by the lock detection unit, when the storage of the disc tray is detected by the discharge request detection unit, the process waits until the detection by the discharge request detection unit is stopped. The optical disk apparatus according to claim 1, wherein the optical disk apparatus executes a discharge process in response to detection by the discharge request detection unit, and releases the lock mechanism by the release unit. After the predetermined time has elapsed after the lock detection unit detects the storage of the disc tray, the release unit releases the lock mechanism when the discharge request detection unit detects the storage of the disc tray. The optical disc apparatus according to claim 1, wherein: The discharge part is
After the lock detection unit detects the storage of the disc tray, if the storage of the disc tray is not detected by the ejection request detection unit, the disc detection of the optical disc is started after waiting for a predetermined time. The optical disc apparatus according to claim 1. The lock detector and the discharge request detector are
The optical disk apparatus according to claim 1, further comprising: a member protruding from the disk tray; and a detection switch provided on the base side and facing the member. The lock detector and the discharge request detector are
The optical disk device according to claim 1, further comprising: a member protruding from the base; and a detection switch provided on the disk tray side and facing the member. The optical disk apparatus according to claim 1, further comprising a blocking unit that blocks the laser light source of the pickup when a plurality of the lock detection units are provided and detection by any of the lock detection units is lost.