JP2008034013A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device which can print a design on a label surface of an optical disk in a nonstandard shape provided with no index mark thereon, and which never causes defects on the design even in the result of printing the design on such a label surface. <P>SOLUTION: The device is equipped with a rotation mechanism 13 comprising a rotating position detection means which rotates the optical disk 7 and detects its rotating position, a sensor 23 which detects presence of the label surface of the optical disk 7, a control circuit 51 which has a shape measurement part 39 for measuring the shape of the label surface of the optical disk 7 based on the results obtained by the sensor 23 and the rotating position detection means, and a printer head 21 for printing the design based on the measured shape of the label surface of the optical disk 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical disc device, and more particularly to an optical disc device having a function of printing a desired design on a label surface of an irregular optical disc.

  2. Description of the Related Art Techniques for printing designs such as letters and pictures on a disk surface (hereinafter referred to as a label surface) of a disk-shaped recording medium (hereinafter referred to as an optical disk) such as a CD (Compact Disc) and a DVD (Digital Versatile Disc) are known. Yes.

  When printing a design on the label side, generally a circular disc is targeted, so if the center position of the disc does not change, it is possible to print the desired design no matter how the disc is set in the horizontal plane It is. However, such a technique cannot be printed on a desired design because the printable range of the label surface cannot be specified when the optical disc is an irregular shape such as a business card type, barrel type or heart type. There was a point.

To deal with such a problem, for example, Patent Document 1 discloses an optical disc apparatus that can determine the possible design range for the label surface of an irregular optical disc. In Patent Document 1, an optical disc having an index mark provided at least at a position to be a line object with respect to the outer shape is used. Then, the label surface of the optical disk is rotated while irradiating light, and the reflected light of the light irradiated from the inner periphery to the outer periphery is detected with the index mark as a starting point. The reflected light is recorded in the controller, and the printable range of the label surface is specified from the change in reflectance of the reflected light.
JP 2005-317104 A FIG.

  However, in the invention disclosed in Patent Document 1 described above, when the index mark is not provided on the optical disc, the printable range of the label surface cannot be specified, and the design cannot be accurately printed on the label surface. There was a problem.

  Further, even if the shape of the irregular optical disk can be grasped, there is a problem that a positional deviation occurs between the design data to be printed on the label surface and the printing position on the label surface of the optical disk. That is, for example, FIG. 13 is a plan view of an irregular optical disk in which the design printing position has shifted in printing on the label surface. As shown in FIG. 13, “Text 1” indicating the title of the song is A deficiency has occurred in some areas.

  In this way, if the design data and the printing position of the optical disc are not synchronized, the design will not be lost, and if it is synchronized, ink will be ejected to the location that would have been printed correctly. As a result, the inside of the optical disk apparatus is contaminated, and further, there is a problem in that the optical disk apparatus fails due to such a situation.

  The present invention has been made in view of such problems, and it is possible to print a design on a label surface of an irregular optical disk not provided with an index mark, and furthermore, on such a label surface. Provided is an optical disc apparatus in which a design is not damaged even when a design is printed.

  In order to solve the above-described problems, an optical disc apparatus according to the present invention detects the presence of a rotational drive mechanism including a rotational position detecting means capable of rotationally driving an optical disc and detecting the rotational position, and the label surface of the optical disc. A control circuit having a movable sensor, a shape measuring unit for measuring the shape of the label surface of the optical disc based on the result obtained by the sensor and the rotational position detecting means, and the shape of the measured label surface of the optical disc And a printer head for printing the design based on the above. With such a configuration, the shape of the label of the optical disc can be measured by detecting the presence of the label surface of the optical disc while the sensor is appropriately moved while the rotational drive mechanism on which the optical disc is mounted rotates. Design printing based on can be performed.

  In the present invention, the rotational position detecting means includes a frequency generator that outputs a predetermined pulse signal in accordance with the rotational operation, so that the label shape of the optical disk mounted on the optical disk apparatus can be grasped more accurately. Can do.

  Further, the present invention is characterized in that the sensor is moved by a drive motor in order to measure the shape of the label surface at a predetermined radial position. With such a configuration, the sensor can move in synchronization with the drive motor.

  Further, the present invention is characterized in that the position of the sensor is grasped by the rotational position of the drive motor. With such a configuration, the position of the sensor that detects the presence of the label surface is grasped, and the shape of the optical disc can be grasped from the position information of the sensor.

  Further, the present invention is characterized in that the sensor is installed on a substrate that moves between a back surface and a front surface by a driving force of the drive motor. With such a configuration, the sensor can stably move in the optical disc apparatus and can perform accurate detection.

  Further, the invention is characterized in that the substrate is gripped across two parallel printer head guide shafts connecting the back surface and the front surface. With such a configuration, the substrate on which the sensor is mounted can stably move in the optical disc apparatus, and the sensor can perform accurate detection.

  Further, the invention is characterized in that the printer head performs label printing in synchronization with the rotation operation of the rotation drive mechanism. With such a configuration, it is possible to prevent a shift in the printing position between the measured shape of the optical disc and the design data in label printing.

  According to the optical disk device of the present invention, the shape of the optical disk can be measured even on the label surface of an irregular optical disk not provided with an index mark, and the design and the measured optical disk at the time of printing on the label surface. Since it can be synchronized with the shape of the label surface, the design can be printed accurately.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In the description, the sensor that detects the label surface is assumed to be a reflective optical sensor that detects light by irradiating the label surface with light from the light emitting portion and receiving the reflected light. However, the present invention is not limited to this, and a configuration in which a transmissive optical sensor or a CCD camera is provided and detection is performed by image processing of the photographed image and the printing status is also confirmed is possible.

(First embodiment)
FIG. 1 is a front perspective view showing the internal structure of the optical disc apparatus 100 according to the embodiment of the present invention. FIG. 2 is a rear perspective view showing the internal structure of the optical disc apparatus 100 according to the embodiment of the present invention. FIG.

  As shown in FIG. 1 or FIG. 2, the optical disc apparatus 100 includes a mechanical unit 1, a front panel 3 attached to the front surface of the mechanical unit 1, and a U-shape attached so as to surround the side surface and the rear surface of the mechanical unit 1. Frame 5.

  The front panel 3 is formed with a tray 9 on which the optical disk 7 is placed and a switch 11 for switching the forward / backward movement of the tray 9. In FIG. 1, the tray 9 is shown in a closed state. When the switch 11 is pressed, the tray 9 is pushed out to the front in the horizontal direction.

  The mechanical unit 1 includes a rotation drive mechanism 13 that rotates and drives the optical disc 7 in a predetermined direction, an optical pickup device 14 that is disposed below the optical disc 7 and irradiates the optical disc 7 with light, and the optical pickup device 14 on the front or And a moving device 15 for moving in the direction of the back surface.

  The rotational drive mechanism 13 includes a spindle motor that rotationally drives the optical disc 7, and a frequency generator called FG (Frequency Generator) is disposed in the spindle motor. The frequency generator has a function of outputting a predetermined number of pulse signals while the spindle motor makes one revolution, and the output pulse signals are transmitted to a control circuit 51 described later.

  The moving device 15 includes a motor and parts such as a gear that transmits the driving force of the motor to the optical pickup device. The rotation drive device 13, the optical pickup device 14, and the moving device 15 described above are controlled by a control circuit (not shown) mounted on the optical disc device 100. In FIG. 1 and FIG. 2, the barrel-shaped optical disk 7 is installed in the rotation drive mechanism 13.

  In addition, two printer head guide shafts 17a and 17b are attached to the optical disc apparatus 100 in parallel from the side surface and the bottom surface from the back to the front. A printer head moving mechanism 19 that can move in the front or back direction is disposed across the printer head guide shafts 17a and 17b. More specifically, each of the printer head guide shafts 17a and 17b penetrates and holds the printer head moving mechanism 19 from the back surface to the front surface.

  The printer head moving mechanism 19 includes a printer head 21, a reflection type optical sensor (hereinafter referred to as a sensor) 23, and a printer head base 24 serving as a substrate on which these are mounted. The printer head 21 and the sensor 23 are disposed on the printer head base 24 at the same position as the rotation center of the optical disc 7. At this time, the sensor 23 is in front of the printer head 21, and these are arranged in parallel to the printer head guide shafts 17a and 17b.

  The printer head 21 has a function of printing designs such as pictures and characters on the optical disc 7. The sensor 23 has a function of irradiating the label surface of the optical disc 7 with light and detecting reflected light from the label surface. The printer head moving mechanism 19 is moved by the speed reducer 25 installed on the back surface of the optical disc apparatus 100.

  Furthermore, the speed reducer 25 mentioned above is demonstrated in detail with reference to drawings. FIG. 3 is a cross-sectional view of the speed reducer 25. As shown in FIG. 3, the speed reducer 25 includes a drive motor 27 such as a stepping motor that rotates in response to an input pulse signal, one or more gears that propagate the drive force of the drive motor 27, and the drive motor 27. It is comprised from the installation base 28 which installs.

  Specifically, a motor pinion gear 31 is formed at the tip of the shaft 29 of the drive motor 27. A driving force of the driving motor 27 is transmitted to the motor pinion gear 31, and a first driving gear 33 that reduces the rotational speed of the driving motor 27 to a predetermined speed meshes on the same plane. The first drive gear 33 is integrally formed with a hook 35 that is smaller in diameter than the first drive gear 33 on the frame body 5 side, and the hook 35 is meshed with the second drive gear 37 on the same plane. The printer head guide shaft 17b described above passes through and is fixed to the second drive gear 37.

  The speed reducer 25 has the above-described configuration. When the drive motor 27 receives the pulse signal transmitted from the control circuit 51 and the drive motor 27 is driven to rotate, the drive force is supplied from the motor pinion 31 to the first drive. Propagated to the gear 33, the pinion 35 and the second drive gear 37. Therefore, the printer head guide shaft 17b obtains the driving force and is rotationally driven to move the arranged printer head moving mechanism 19.

  This movement can be performed, for example, when the printer head guide shaft 17b penetrates the printer head base 24 in a screw shape. Further, the control circuit 51 measures the number of pulse signals applied to the drive motor 27, so that the movement distance of the printer head moving mechanism 19 can be accurately operated, for example, every 5 mm, and the position can be specified. .

  Next, the mechanical unit 1 according to the present embodiment will be described with reference to the block diagram shown in FIG. The same components as those of the optical disk device 100 shown in FIGS. 1 and 2 and the speed reducer 25 shown in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 4, the mechanical unit 1 includes a rotation driving mechanism 13 that rotationally drives the optical disc 7, a moving device 15 that moves the optical pickup device 14, a speed reducer 25 that drives the printer head moving mechanism 19, and these And a control circuit 51 for controlling. The printer head moving mechanism 19 includes a sensor 23 that detects the shape of the optical disc 7 and a printer head 21 that prints design data on the label surface of the optical disc 7.

  The control circuit 51 includes an input / output unit 45 that transmits / receives data such as design data to / from an input / output device 49 such as a PC, and a storage unit 47 such as a DRAM or SRAM that stores the input data. Prepare. Further, based on the detection result from the sensor 23, the shape measuring unit 39 that measures the shape of the optical disc 7 is compared with the determining unit 41 that compares the shape of the optical disc 7 with the shape of the design data to determine whether they match. With. Each of these functional blocks is controlled by a control unit 43 such as a CPU.

  The operation of the mechanical unit 1 configured as described above will be described with reference to the flowchart shown in FIG.

  For example, when design data or the like is input from the input / output device 49 by the user, the design data is input from the input / output unit 45 of the control circuit 51 and stored in the storage unit 47 (S101). In synchronization with this, the control unit 43 drives the rotation drive mechanism 13. As described above, when the rotational drive mechanism 13 is rotationally driven, a pulse signal is generated from the frequency generator and transmitted to the control circuit 51. Further, the drive motor 27 is rotationally driven in accordance with the pulse signal transmitted from the control circuit 51, and a driving force based on the rotational drive is transmitted via the speed reducer 25 to operate the printer head moving mechanism 19.

  The printer head moving mechanism 19 irradiates light from the sensor 23 to the label surface of the rotating optical disk 7 while repeatedly moving and stopping from the initial position, and detects the reflected light. More specifically, the sensor 23 detects a location away from the center of the rotating optical disk 7 by a predetermined distance in the radial direction. Then, when the optical disk 7 makes a round after starting to detect the position, the detection of the position is finished, and it moves to the next position.

  The result thus detected is transmitted to the shape measuring unit 39 of the control circuit 51. The shape measuring unit 39 receives the pulse signal generated by the rotational drive mechanism 13 being rotationally driven and the detection result transmitted from the sensor 23, and obtains the shape of the optical disc 7 (S102).

  The determination unit 41 compares the design data stored in the storage unit 47 with the shape of the optical disc 7 measured by the shape measurement unit 39 (S103). When the design data and the shape of the optical disc 7 match (S103: Yes), the control unit 43 rotates the rotation drive mechanism 13 and performs a synchronization process so that the design data matches the shape of the optical disc 7. (S104). Then, after synchronization is established, the printer head 21 starts the printing process (S105).

  On the other hand, if the design data and the shape of the optical disc 7 do not match (S103: No), a warning or warning to that effect is transmitted as data from the input / output unit 45 to the input / output device 49. Thereby, the user determines whether or not to continue the printing process. Then, whether or not to continue the printing process is input and transmitted as data.

  The data is received by the control circuit 51 (S106), and it is determined whether or not the printing process can be continued (S107). When the data is data indicating that the printing process is not continued (S107: No), the control circuit 51 stops the printing process. On the other hand, if the data is data indicating that the printing process is to be continued (S107: Yes), the design data is modified to match the shape of the optical disc 7 (S108). When the modification of the design data is completed, the above-described synchronization process (S104) is performed, and the printing process is started (S105). By performing such synchronization processing, it is possible to prevent design data from being lost on the label surface of the optical disc 7.

  Further, the mechanism of the shape measuring unit 39 that measures the shape of the optical disc 7 will be described with reference to FIGS.

  FIG. 6 is a conceptual diagram showing the relationship between the rotation angle of the spindle motor of the rotation drive mechanism 13 and the trajectory of light to the optical disk 7 by the sensor 23. That is, when the rotating optical disk 7 is irradiated with light at one point and the light trajectory is followed, a light trajectory as shown in FIG. 6 is obtained. A plurality of concentric circles indicated by a two-dot chain line is a locus of light emitted from the sensor 23 to the label surface of the optical disc 7.

  The circle of the first two-dot chain line separated from the center in the radial direction indicates a light locus at a position 15 mm away from the center O of the rotation drive mechanism 13 in the radial direction, and thereafter 55 mm from the center O at intervals of 5 mm in the radial direction. A total of nine light trajectories including the first two-dot chain line are shown up to a distance.

  Further, the hatched portion is a portion where the reflected light from the label surface of the optical disc 7 can be detected. Therefore, in FIG. 6, it can be seen that the distance from the center O to 15 mm, 20 mm, 25 mm, 30 mm, and 35 mm surely covers the two-dot chain line, and the reflected light from the label surface of the optical disk 7 can be detected. Next, it can be seen that the reflected light from the optical disc 7 can be detected at a position 40 mm and 45 mm away from the center O except for a part of the two-dot chain line. Furthermore, it can be seen that when reaching a position 50 mm or 55 mm away from the center O, the two-dot chain line is not covered at all, and the reflected light from the label surface of the optical disc 7 cannot be detected. Thus, it is possible to specify the shape of the label surface of the optical disc 7 by irradiating the label surface of the rotating optical disc 7 with light and determining whether or not the reflected light has been detected.

  Further, FIG. 7 is a diagram for explaining the relationship between the rotation angle of the rotary drive mechanism 13 and the presence or absence of reflected light with respect to the conceptual diagram described above. In FIG. 7, an FG signal indicates a pulse signal generated from the above-described frequency generator, and H indicates that the signal has occurred and L indicates that it has not occurred.

  Further, r = 15, r = 20, and the like indicate distances away from the center O of the rotational drive mechanism 13, and if r = 15, indicate positions 15 mm away from the center O. When there is reflected light at each position, it is indicated as H, and when there is no reflected light, it is indicated as L.

  As shown in FIG. 7, from r = 15 to r = 35, as explained with reference to FIG. 6, H is always shown from 0 ° to 360 °, and it can be seen that there was always reflected light. It can be seen that at r = 40 and r = 45, there was no reflected light in part from 0 ° to 360 °. It can be seen that at r = 50 and r = 55, there was no reflected light from 0 ° to 360 °.

  Therefore, in contrast to the result obtained from FIG. 7, when only the portion H is rewritten on the polar coordinates, the result shown in FIG. 8 is obtained. That is, it can be understood that the result shown in FIG. 8 is the label shape of the optical disc 7 in the present embodiment.

  FIG. 9 is a plan view of an irregular optical disk 7 printed according to this embodiment. Thus, according to the present embodiment, the user can synchronize the shape of the label surface of the optical disc 7 and the design data without particularly adjusting the orientation of the optical disc 7, so that there is a problem as in the prior art. The user's desired print result can be obtained without the occurrence of.

(Second Embodiment)
Next, a second embodiment according to the present invention will be described with reference to FIGS. The second embodiment is different from the barrel shape described in the first embodiment in that the label surface of the optical disc 7 has a business card shape.

  FIG. 10 is a conceptual diagram in the second embodiment showing the relationship between the rotation angle of the spindle motor of the rotation drive mechanism 13 and the trajectory of light to the optical disc 7 by the sensor 23. Similar to the conceptual diagram shown in FIG. 6, in the sensor 23, a plurality of concentric circles indicated by a two-dot chain line is a locus of light emitted from the sensor 23 to the optical disk 7. The first two-dot chain line that is separated from the center in the radial direction indicates the locus of the light at a position 15 mm away from the center O of the spindle motor in the radial direction, and thereafter is 55 mm away from the center O at intervals of 5 mm in the radial direction. To the position, a total of 10 light trajectories including the first two-dot chain line are shown.

  Further, the hatched portion is a portion where the reflected light from the optical disc 7 can be detected. Therefore, in FIG. 10, it can be seen that the distance from the center O to 15 mm, 20 mm, 25 mm, 30 mm, and 35 mm surely covers the two-dot chain line, and the reflected light from the optical disc 7 can be detected. Next, it can be seen that the reflected light from the optical disc 7 can be detected except for a part of the two-dot chain line at positions 40 mm, 45 mm, 50 mm, and 55 mm away from the center O. Furthermore, it can be seen that when reaching the position 60 mm away from the center O, the two-dot chain line is not covered at all, and the reflected light from the optical disc 7 cannot be detected.

  Thus, even if the shape of the label surface of the optical disc 7 is a business card type, it is possible to irradiate light from the sensor 23 to the label surface of the rotating optical disc 7 and determine whether or not the reflected light can be detected. The shape of the label surface of the optical disc 7 can be specified.

  Further, FIG. 11 is a diagram for explaining the relationship between the rotation angle of the spindle motor and the presence or absence of reflected light with respect to the conceptual diagram described above. In FIG. 11, an FG signal indicates a pulse signal generated from the above-described frequency generator, and H indicates that the signal has occurred and L indicates that it has not occurred.

  Also in this embodiment, r = 15, r = 20, etc. indicate distances away from the center O of the spindle motor, and if r = 15, they indicate positions 15 mm away from the center O. When there is reflected light at each position, it is indicated as H, and when there is no reflected light, it is indicated as L.

  As shown in FIG. 11, from r = 15 to r = 35, as described with reference to FIG. 10, H is always shown from 0 ° to 360 °, and it can be seen that there was always reflected light. From r = 40 to r = 55, it can be seen that there was no reflected light in part from 0 ° to 360 °.

  Therefore, in contrast to the result obtained from FIG. 11, when only the portion of H is written back on the polar coordinates, the result as shown in FIG. 12 is obtained. That is, it can be understood that the result shown in FIG. 12 is the shape of the label surface of the optical disc 7 in the present embodiment.

  Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  As described above, the optical disc apparatus according to the present invention can measure the shape of the label surface of the optical disc even on the label surface of an irregular optical disc not provided with an index mark, and at the time of printing on the label surface. Since the design data and the shape of the measured label surface of the optical disc can be synchronized, the design can be printed accurately and the industrial applicability is high.

FIG. 1 is a front perspective view showing the internal structure of the optical disc apparatus. FIG. 2 is a rear perspective view showing the internal structure of the optical disc apparatus. FIG. 3 is a cross-sectional view of the speed reducer. FIG. 4 is a block diagram of the mechanical unit. FIG. 5 is a flowchart showing the operation of the mechanical unit. FIG. 6 is a conceptual diagram showing the rotation angle of the spindle motor and the accompanying light trajectory. FIG. 7 is a diagram for explaining the relationship between the rotation angle of the spindle motor and the presence or absence of reflected light. FIG. 8 is a conceptual diagram showing the shape of the label surface of the optical disk obtained from FIG. FIG. 9 is a plan view of an irregular optical disk printed according to the first embodiment. FIG. 10 is a conceptual diagram showing the rotation angle of the spindle motor and the accompanying light trajectory. FIG. 11 is a diagram for explaining the relationship between the rotation angle of the spindle motor and the presence or absence of reflected light. FIG. 12 is a conceptual diagram showing the shape of the label surface of the optical disk obtained from FIG. FIG. 13 is a plan view of an indeterminate optical disc in which the printing position has shifted in printing on the label surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mechanical unit 3 Front panel 5 Frame 7 Optical disk 9 Tray 11 Switch 13 Rotation drive mechanism 14 Optical pick-up device 15 Moving device 17a, 17b Printer head guide shaft 19 Printer head moving mechanism 21 Printer head 23 Sensor 24 Printer head base 25 Decelerator Reference Signs List 27 drive motor 28 installation base 29 shaft 31 motor pinion gear 33 first drive gear 35 kana 37 second drive gear 39 shape measurement unit 41 determination unit 43 control unit 45 input / output unit 47 storage unit 49 input / output device 51 control circuit 100 Optical disk device

Claims (7)

A rotational drive mechanism including rotational position detecting means capable of rotationally driving an optical disc and detecting the rotational position;
A movable sensor for detecting the presence of the label surface of the optical disc;
A control circuit having a shape measuring unit for measuring the shape of the label surface of the optical disc based on the result obtained by the sensor and the rotational position detecting means;
A printer head for printing a design based on the shape of the measured label surface of the optical disc;
An optical disc apparatus comprising:   2. The optical disc apparatus according to claim 1, wherein the rotational position detecting means includes a frequency generator that outputs a predetermined pulse signal in accordance with a rotational operation.   The optical disk apparatus according to claim 1, wherein the sensor is moved by a drive motor in order to perform shape measurement of the label surface at a predetermined radial position.   The optical disk apparatus according to claim 3, wherein a position of the sensor is grasped by a rotational position of the drive motor.   5. The optical disk apparatus according to claim 3, wherein the sensor is installed on a substrate that moves between a back surface and a front surface by a driving force of the drive motor.   6. The optical disc apparatus according to claim 5, wherein the substrate is held across two parallel printer head guide shafts connecting the back surface and the front surface. The optical disk apparatus according to claim 1, wherein the printer head performs label printing in synchronization with a rotation operation of the rotation drive mechanism.

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