JP2014044767A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device for preventing the label surface of an optical disk from being scratched during the conveyance of the optical disk regardless of an installation attitude.SOLUTION: The optical disk device includes: an arm clamper assembly having a clamper for chucking an optical disk from a label surface side and a protruding shaft; and a slider 24 having a cam groove 24b with which the shaft is movably engaged. When the clamper moves from the chucking position to a position where it is not brought into contact with the optical disk, a first inclination angle θ1 of a cam groove portion where the shaft moves is larger than 45° with respect to the moving direction of the slider 24 during the chucking operation.

Description

  The present invention relates to an optical disc apparatus that performs recording / reproduction with respect to an optical disc such as a BD (Blu-ray Disc) and a DVD (Digital Versatile Disc).

  Various forms have been proposed for an optical disc apparatus that reproduces or records on an optical disc. For example, one type of optical disk device has a disk loading mechanism for storing and ejecting an optical disk using a tray on which the optical disk is placed and conveyed. Some have a slot-in type disk loading mechanism that directly stores and ejects the optical disk without being placed on the tray.

  In such a disc loading mechanism, generally, a clamper assembly that can be raised and lowered to chuck an optical disc and a slider that raises and lowers the clamper assembly are used. Specifically, an inclined cam groove is formed in the slider, and the clamper assembly moves up and down by moving the shaft of the clamper assembly along the cam groove by the movement of the slider (Patent Document 1). To 3).

  By the way, the installation posture of the optical disc apparatus is generally set vertically or horizontally (horizontal posture). In the case of the vertical installation, the label surface of the optical disc is stored and ejected in a vertical state, and in the case of the horizontal installation, the label surface of the optical disc is stored and discharged in a horizontal state.

Japanese Patent No. 3862733 JP 2005-228441 A JP 2008-226361 A

  When the optical disk device having the loading mechanism as described above is placed vertically, the shaft of the clamper assembly moves along the lower side of the slider cam groove (upper side when placed horizontally) by gravity when the optical disk is ejected. So no problem arises. On the other hand, when placed horizontally, the shaft moves along the lower side of the cam groove due to gravity when the optical disc is ejected, so the rise of the clamper assembly is delayed, and the clamper comes into contact with the label surface of the optical disc being transported. The label surface could be scratched.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disc apparatus that does not damage the label surface of an optical disc during conveyance of the optical disc regardless of the installation posture.

  In order to achieve the above object, an optical disc apparatus of the present invention has a clamper for chucking an optical disc from the label surface side, an arm clamper assembly having a protruding shaft, and a cam groove in which the shaft is movably engaged. A first inclination angle of the cam groove portion to which the shaft moves when the clamper moves from a chucking position to a position not in contact with the optical disc, and a moving direction during a chucking operation of the slider It is characterized by being larger than 45 °.

  In the above optical disc apparatus, it is more preferable that the first inclination angle is 55 to 75 ° with respect to the moving direction during the chucking operation of the slider.

  Further, in the above optical disc apparatus, when the clamper moves from a position where it does not contact the optical disc to an unchucking position, the second inclination angle of the cam groove portion where the shaft moves is equal to the first inclination angle. It may be.

  Further, in the above optical disc apparatus, when the clamper moves from a position where it does not contact the optical disc to an unchucking position, the second inclination angle of the cam groove portion to which the shaft moves is determined during chucking operation of the slider. The form may be smaller than 45 ° with respect to the moving direction.

  Further, the optical disc apparatus may include a spring that biases the arm clamper assembly in the operation direction during an unchucking operation.

  According to the present invention, even when the optical disk device is installed horizontally (horizontal posture), the clamper does not come into contact with the label surface of the optical disk while the optical disk is being transported, thereby preventing the label surface of the optical disk from being damaged. it can.

It is a block diagram which shows the structure of the optical disk apparatus of one Embodiment of this invention. 1 is a perspective view of a drive device of an optical disk device according to an embodiment of the present invention. It is a perspective view of the arm clamper assembly of one embodiment of the present invention. It is a side view of the slider of one Embodiment of this invention. It is a side view of the arm clamper assembly and slider in the chucking completion position of one Embodiment of this invention. It is a side view of the arm clamper assembly and slider in the unchucking completion position of one Embodiment of this invention. It is a side view of the cam groove of one embodiment of the present invention.

  The following description is based on a state in which the optical disk device is installed horizontally (horizontal posture), that is, a state in which the label surface of the optical disk is horizontally stored and ejected upward. Horizontal means a direction perpendicular to the vertical direction. The side from which the optical disk is ejected is the front side.

  FIG. 1 is a block diagram showing the configuration of the optical disc apparatus of the present embodiment. The optical disc apparatus 1 can reproduce information on the optical disc 15 and record information on the optical disc 15. Reference numeral 2 denotes a spindle motor, and the optical disk 15 is detachably held by a chuck portion (turn table and clamper) provided on the upper portion of the spindle motor 2. Then, when recording / reproducing information on the optical disk 15, the spindle motor 2 continuously rotates the optical disk 15. The rotation control of the spindle motor 2 is performed by the spindle motor control unit 3.

  Reference numeral 4 denotes an optical pickup unit (OPU) that irradiates the optical disk 15 with a light beam emitted from a light source, thereby enabling writing of information on the optical disk 15 and reading of information recorded on the optical disk 15.

  The signal processing unit 8 includes at least an RF signal processing unit 9, a track error signal processing unit 10, and a focus error signal processing unit 11. The signal processing unit 8 generates an RF signal, a track error signal (TE signal), and a focus error signal (FE signal) based on the electrical signal converted by the photodetector (not shown). The RF signal is demodulated into data by the data demodulator 12.

  The TE signal and the FE signal are output to the actuator control unit 7. Based on these signals, the actuator controller 7 supplies a drive signal to an actuator (not shown) that can move the objective lens. The actuator to which the drive signal is supplied operates each part based on the signal, moves the objective lens in a direction parallel to the optical axis, and performs focus control and an objective lens that causes the recording surface 15a of the optical disc 15 to follow the focus. Tracking control is performed to move in the direction parallel to the radial direction of the optical disc 15 so that the spot position of the light beam follows the track position formed on the optical disc 15.

  In addition, the laser control means 5 controls the laser output of a light source (not shown) composed of a semiconductor laser provided in the optical pickup 4. The overall control unit 13 controls the spindle motor control unit 3, the laser control unit 5, the beam expander control unit 6, the actuator control unit 7, the signal processing unit 8, the data demodulation unit 12, and the like to control the entire apparatus. Take control.

  FIG. 2 is a perspective view of the drive device of the optical disk device 1 according to the present embodiment. The optical disk apparatus 1 accommodates a drive device 20 in a housing of an apparatus main body that forms an appearance. The drive device 20 includes an arm clamper assembly including a loader chassis 21 that accommodates each member of the drive device 20, a plurality of rollers (not shown) that convey the optical disc 15, and a clamper 22 that chucks the optical disc from the label surface side. 23, a slider 24 which is arranged on the side surface of the arm clamper assembly 23, moves in the front-rear direction (transport direction of the optical disc 15) and moves the arm clamper assembly 23 up and down (moves up and down), and a roller and a slider 24 with a plurality of gears. A motor (not shown) that is driven through the cover, a cover 25 that covers the upper surface of the loader chassis 21, a spring that is fixed to the arm clamper assembly 23 at one end and the cover 25 at the other end, and biases the arm clamper assembly 23 in the upward direction. 26.

  Although not shown, the loader chassis 21 has an OPU on the lower surface side of the arm clamper assembly 23, two guide shafts that support the OPU so as to be movable in the radial direction (front-rear direction) of the optical disc 15, and an OPU drive. A stepping motor, a spindle motor for rotating the optical disk 15, and a turntable provided on the spindle motor are also accommodated.

  In the optical disk apparatus having the above configuration, when the optical disk 15 is inserted, the optical disk 15 is transported into the optical disk apparatus 1 by driving the motor, and the slider 24 moves to lower the arm clamper assembly 23. Thereby, the clamper 22 and the turntable are engaged, and the optical disk 15 is chucked.

  When the optical disc 15 is chucked, transmission of the driving force of the motor to the slider 24 is released, and the slider 24 and the arm clamper assembly 23 are stopped. Subsequently, the OPU moves to a predetermined position by driving the stepping motor, and recording or reproduction is performed on the optical disc 15. Further, when the optical disk is taken out, the reverse operation is performed.

  Next, characteristic components of the present invention will be described in detail. 3 is a perspective view of the arm clamper assembly 23, FIG. 4 is a side view of the slider 24, FIG. 5 is a side view of the arm clamper assembly 23 and the slider 24 in the chucking completion position, and FIG. 6 is in the unchucking completion position. 3 is a side view of an arm clamper assembly 23 and a slider 24. FIG. In other words, FIG. 5 shows a state after the slider 24 has moved in the arrow A direction (forward direction), and FIG. 6 shows a state after the slider 24 has moved in the arrow B direction (rear direction).

  As shown in FIG. 3, the arm clamper assembly 23 has side portions 23a and 23b formed by bending the left and right ends downward at a right angle. Through holes 23c and 23d are provided in the vicinity of the rear ends of the side portions 23a and 23b, respectively. Then, by inserting projections (not shown) of the cover 25 into the through holes 23c and 23d, the arm clamper assembly 23 can be rotated around the through holes 23c and 23d, that is, can be raised and lowered.

  The arm clamper assembly 23 has a shaft 23e that protrudes outward in the horizontal direction from the side surface portion 23a. The shaft 23e is a columnar member, and is fixed to the hole of the side surface portion 23a by caulking, for example. The shaft 23e is movably engaged with a cam groove of a slider 24 described later, and slides along the cam groove, whereby the arm clamper assembly 23 can be raised and lowered.

  As shown in FIG. 4, a rack 24 a is formed on the slider 24. The rack 24a meshes with a gear to be driven, and the slider 24 is moved forward (arrow A direction) or backward (arrow B direction) by the rotation of the gear. The slider 24 is provided with a cam groove 24b which is a long hole penetrating in the left-right direction.

  The cam groove 24b includes a chucking side horizontal portion 24c, an inclined portion 24d, and an unchucking side horizontal portion 24e. The chucking-side horizontal portion 24c is a horizontal groove portion where the shaft 23e is positioned when the clamper 22 is in the chucking position or the chucking completion position. On the other hand, the unchucking horizontal portion 24e is a horizontal groove portion where the shaft 23e is located when the clamper 22 is in the unchucking position or the chucking completion position, and is located above the chucking side horizontal portion 24c. To do. The inclined portion 24d is an inclined groove portion that smoothly connects the chucking side horizontal portion 24c and the unchucking side horizontal portion 24e.

  Here, the chucking position refers to a point in time when the clamper 22 descends and reaches the lowest point, that is, the shaft 23e is positioned at a connection point between the inclined portion 24d of the cam groove 24b and the chucking side horizontal portion 24c. It is in a state of being. Further, the chucking completion position is the state shown in FIG. 5 and is a state where the movement of the slider 24 is finished and the shaft 23e is located near the end of the chucking side horizontal portion 24c.

  On the other hand, the unchucking position refers to a point in time when the clamper 22 is raised and reaches the uppermost point, that is, the shaft 23e is located at a connection point between the inclined portion 24d of the cam groove 24b and the unchucking side horizontal portion 24e. It is in a state of being. Further, the unchucking completion position is the state shown in FIG. 6, and is the state where the movement of the slider 24 is finished and the shaft 23e is located near the end of the unchucking side horizontal portion 24e.

  When the optical disk device 1 is installed horizontally (horizontal posture), the optical disk 15 is ejected (operation from the state of FIG. 5 to the state of FIG. 6) and stored (operation from the state of FIG. 6 to the state of FIG. 5). ), The shaft 23e is moved along the lower side of the inclined portion 24d by gravity. The spring 26 does not have such a large biasing force that the shaft 23e is lifted.

  Next, the inclination angle (first inclination angle) θ1 of the inclined portion 24d is set to be larger than 45 ° with respect to the moving direction (arrow A direction) during the chucking operation of the slider 24. With such an inclination angle θ1, when installed horizontally (horizontal posture), the shaft 23e moves along the lower side of the inclined portion 24d during the ejection operation of the optical disc 15, but the inclination angle θ1 is large. The clamper 22 moves away from the optical disk 15 at an early point. Therefore, the lower end of the clamper 22 is already positioned above the upper surface (label surface) of the optical disk 15 at the start of conveyance when the optical disk 15 is ejected. Therefore, the clamper 22 does not come into contact with the label surface of the optical disk 15 while the optical disk 15 is being transported, so that the label surface of the optical disk 15 can be prevented from being damaged. Conversely, it is possible to prevent the label surface from being damaged in the storing operation of the optical disk 15 as well. This is confirmed by performing a series of operations for storing and ejecting the optical disk 15 100 times, and that the label surface of the optical disk 15 is not damaged.

  In order to realize a smooth operation of the arm clamper assembly 23, the inclination angle θ1 is preferably 55 to 75 °, and more preferably about 60 °. When the inclination angle θ1 is 45 ° or less, when the optical disc apparatus 1 is installed horizontally, the shaft 23e moves along the lower side of the cam groove 24b by gravity when the optical disc 15 is ejected, so the arm clamper Ascending of the assembly 23 is delayed, the clamper 22 may come into contact with the label surface of the optical disk 15 being conveyed, and the label surface may be damaged. On the other hand, when the inclination angle θ1 is greater than 75 °, the resistance when the shaft 23e rises from the chucking side horizontal portion 24c of the cam groove 24b to the inclined portion 24d increases, and the operation load increases. However, since the resistance can be reduced by making the connecting portion between the chucking-side horizontal portion 24c and the inclined portion 24d curved, it can be realized even when the inclination angle is near a right angle.

  By the way, in the optical disc apparatus 1, the height of the chucking position and the height of the unchucking position are often determined in advance by design. Therefore, the height at which the shaft 23e is positioned cannot be changed between the chucking position and the unchucking position. Therefore, the unchucking position cannot be changed so as to be positioned further upward. Also, the chucking completion position and the unchucking completion position are often determined.

  Therefore, in order to increase the inclination angle θ1 of the inclined portion 24d as described above, the unchucking position is brought closer to the chucking position and unchucking is accelerated. That is, the unchucking side horizontal portion 24e is designed to be long.

  In the above-described embodiment, the inclined portion 24d is a linear inclined portion having only the inclination angle θ1, but the inclination angle needs to be θ1 because at least the clamper 22 moves from the chucking position to the optical disc 15. This is the inclination angle of the cam groove portion where the shaft 23e moves when moving to a position where it does not contact. That is, if the inclination angle from the lower end of the inclined portion 24d to the middle of the inclined portion 24d is θ1, the effect of the present invention can be obtained.

  Therefore, the form as shown in FIG. 7 is also conceivable as another form of the inclined portion. FIG. 7 is a side view of another embodiment of the cam groove 30. The cam groove 30 includes a chucking side horizontal portion 30a, a first inclined portion 30b, a second inclined portion 30c, and an unchucking side horizontal portion 30d.

  The inclination angle (first inclination angle) θ1 of the first inclined portion 30b is the same as that in the above embodiment. The inclination angle (second inclination angle) θ2 of the second inclined portion 30c is set to be smaller than 45 ° with respect to the moving direction during the chucking operation of the slider. That is, when the clamper 22 moves from a position where it does not contact the optical disk 15 to the unchucking position, the inclination angle (second inclination angle) θ2 of the cam groove portion where the shaft 23e moves is the movement during the chucking operation of the slider. It is set to be smaller than 45 ° with respect to the direction.

  By providing the second inclined portion 30c having such a small inclination angle, the rapid movement of the arm clamper assembly 23 can be moderated, and the chucking and unchucking operations are stabilized.

  If the inclination angle θ2 is used to express the form of the cam groove 24b shown in FIG. 4, the cam groove portion where the shaft 23e moves when the clamper 22 moves from the position not contacting the optical disk 15 to the unchucking position. It can be said that the inclination angle θ2 is equal to the inclination angle θ1.

  In the above embodiment, the state in which the optical disk device is installed horizontally (horizontal posture) has been described, but it goes without saying that the same effect as described above can be obtained even when the optical disk device is installed vertically. Therefore, according to the present invention, it can be said that the label surface of the optical disc is not damaged during the conveyance of the optical disc, regardless of the installation posture of the optical disc apparatus.

  In the above embodiment, the optical disk apparatus having the disk loading mechanism for directly storing and ejecting the optical disk has been described as an example. However, the present invention can be applied to any optical disk apparatus that employs a mechanism for moving the clamper up and down by a slider. . For example, the present invention can be applied to an optical disc apparatus having a disc loading mechanism for storing and ejecting an optical disc using a tray on which the optical disc is placed and conveyed.

  INDUSTRIAL APPLICABILITY The present invention can be used for an optical disk apparatus including a reproducing apparatus that reproduces an optical disk such as a BD, a DVD, a CD (Compact Disc), and an MD (Mini Disc), and a recording / reproducing apparatus that can also record on the optical disk. . Examples thereof include a BD / DVD player, a BD / DVD recorder, a TV-integrated BD / DVD recorder, and a personal computer equipped with a BD / DVD recording / reproducing apparatus.

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 15 Optical disk 22 Clamper 23 Arm clamper assembly 23e Shaft 24 Slider 24b, 30 Cam groove 26 Spring (theta) 1 1st inclination angle (theta) 2 2nd inclination angle

Claims (5)

An arm clamper assembly having a clamper for chucking the optical disk from the label surface side and a protruding shaft;
A slider having a cam groove with which the shaft is movably engaged, and
When the clamper moves from the chucking position to a position where it does not come into contact with the optical disc, the first inclination angle of the cam groove portion where the shaft moves is more than 45 ° with respect to the moving direction during the chucking operation of the slider. An optical disc apparatus characterized by being large.   2. The optical disc apparatus according to claim 1, wherein the first tilt angle is 55 to 75 [deg.] With respect to the moving direction during the chucking operation of the slider.   2. The second inclination angle of the cam groove part where the shaft moves when the clamper moves from a position where it does not contact the optical disk to an unchucking position is equal to the first inclination angle. Or the optical disk apparatus of 2.   When the clamper moves from a position where it does not contact the optical disc to an unchucking position, the second inclination angle of the cam groove portion where the shaft moves is 45 ° with respect to the moving direction during the chucking operation of the slider. 3. The optical disk apparatus according to claim 1, wherein the optical disk apparatus is smaller.   5. The optical disc apparatus according to claim 1, further comprising a spring that biases the arm clamper assembly in an operation direction during an unchucking operation.

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