JP4498821B2 - Optical disk device - Google Patents

Description

  The present invention relates to an optical disc apparatus that identifies the type, shape, or insertion state of an optical disc and ejects the optical disc when there is an abnormality.

As shown in FIGS. 13 and 14, the conventional optical disc apparatus 100 includes a base 101. The base 101 is substantially in the direction in which the inserted optical disc 102 passes (that is, the loading direction and the ejecting direction). An optical disc guide member 104 that restricts the movement in the orthogonal width direction (arrow 103a) and forms an insertion path is provided.
Further, the optical disk 102 is transported by contacting the inserted optical disk 102 and transmitting power, and urged downward (arrow 103b) with respect to the inserted optical disk 102 in order to load and eject the optical disk 102. A roller member 105 is provided. Further, a power source (not shown) that engages with a gear 105 a provided on the roller member 105 and rotates the roller member 105 is provided (see, for example, Patent Document 1).

In the optical disc apparatus 100, a lever member 106 having a shaft portion 106a that comes into contact with the outer periphery of the optical disc 102 when the optical disc 102 is inserted is provided on the roller member 105 side with respect to the optical disc guide member 104.
Also, bush switches 108 a and 108 b that detect displacement of the lever member 106 by contacting a plurality of light receiving elements 107 a, 107 b, 107 c, and 107 d and a protrusion 106 b provided on the lever member 106 are provided.

The bush switch 108b is provided at a position where the lever member 106 detects the maximum displacement in the direction of the arrow 103c, and can detect the 12 cm optical disk 102. A transparent optical disk can also be detected.
In addition, light-emitting elements (not shown) that emit detection light are provided facing the light receiving elements 107a, 107b, 107c, and 107d, respectively, so that the optical disk 102 that passes therethrough is detected by the detection light being blocked by the optical disk 102. It has become.
Japanese Patent Laying-Open No. 2003-248995 (FIGS. 1 and 2)

  However, in the conventional optical disc apparatus 100, various optical discs such as an ordinary 12 cm optical disc, a transparent optical disc, and an adapter for using an 8 cm optical disc are combined by combining the lever member 106 and the light receiving elements 107a, 107b, 107c, and 107d. It is very complicated because it is detected.

  The present invention has been made to solve the conventional problems, and provides an optical disc apparatus capable of identifying the type and insertion state of an optical disc by a simple mechanism and ejecting the optical disc when there is an abnormality. For the purpose.

An optical disc apparatus according to the present invention includes a main body that can store an optical disc therein, an insertion / removal port through which the optical disc can be inserted into and removed from the inside of the main body, and the optical disc that is provided inside the main body and sandwiches the optical disc. A plurality of peripheral edge detecting means for continuously and individually detecting positions in contact with the peripheral edge of the optical disk inside the main body, the optical disk device comprising a roller capable of conveying the optical disk into the main body by rotating; And the peripheral edge detecting means is a mechanical sensor that can contact the peripheral edge of the optical disc.

With this configuration, when the storage of the optical disk is started, the pair of rollers rotate to sandwich the optical disk inserted into the insertion / removal opening of the optical disk apparatus main body and carry it into the main body. At this time, the peripheral edge detecting means provided in the main body continuously detects the peripheral edge of the inserted optical disk, thereby detecting the outer diameter, shape and insertion state of the inserted optical disk. The peripheral edge detecting means detects the peripheral edge of the optical disk by the detector of the mechanical sensor directly contacting the peripheral edge of the optical disk, so that the size of the optical disk can be reliably detected using an inexpensive mechanical sensor. Examples of the mechanical sensor include a rotary sensor that continuously detects when the detector rotates, and a slide sensor that continuously detects when the sensor moves linearly.

  Furthermore, the optical disc apparatus according to the present invention has a configuration in which a pair of the peripheral edge detection means is provided along a direction intersecting with the insertion / removal direction of the optical disc.

  With this configuration, by arranging the pair of peripheral edge detection means on both the left and right sides, which are the directions intersecting with the insertion / removal direction of the optical disk to be inserted, the peripheral edge of the optical disk can always be contacted when the optical disk is loaded . In addition, by detecting from both the left and right sides, a device having a short stroke for detection can be used, so that the size of the apparatus can be reduced.

  The present invention provides an optical disc apparatus having an effect that an outer diameter, a shape, and an insertion state of an inserted optical disc can be detected by providing a peripheral edge detection means for detecting the peripheral edge of the optical disc inside the main body. It is something that can be done.

Hereinafter, an optical disk device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an overall perspective view of a car audio device 1 incorporating an optical disk device 10 according to an embodiment of the present invention. The car audio device 1 includes a radio 2, a cassette tape player 3 and the like in addition to the optical disc device 10, and a front panel 4 includes a display unit 4a shared by all functions and a power / volume knob 4b. In addition, an optical disk insertion / removal port 11 in the optical disk device 10, a tuning knob 2a for radio, a cassette tape insertion port 3a, and the like are provided. In addition, a control unit 5 for controlling the radio 2, the cassette tape reproducing device 3, the optical disk device 10 and the like is provided inside.

FIG. 2 shows a cross-sectional view of the optical disc apparatus 10 according to the embodiment of the present invention built in the car audio apparatus 1 at the position II-II in FIG.
As shown in FIG. 2, the optical disk apparatus 10 includes a main body 13 that can store an optical disk 12 on which information is recorded, an insertion / removal port 11 that allows the optical disk 12 to be inserted into and removed from the inside of the main body 13, and a main body 13 is provided with insertion / removal rollers 14 and 14, which are a pair of rollers that can be conveyed by rotating in a state where the optical disk 12 is sandwiched. Further, a peripheral edge detection means 20 for detecting the peripheral edge 12 a of the optical disk 12 is provided inside the main body 13.

Inside the main body 13, there is provided a reproduction mechanism (not shown) for reproducing the optical disk 12 inserted from the insertion / removal port 11. Further, in the case of a multi-connection type in which a plurality of optical disks 12 are stored and one of them is selectively reproduced, a plurality of sheets for storing the optical disks 12 inserted from the insertion / removal port 11 are omitted. The tray is provided so as to be movable up and down and to be positioned at the storage / removal position and the reproduction position.
In this case, the optical disk 12 is sequentially inserted by pressing a button 6 that is a storage start operation means provided on the front panel 4 (see FIG. 1).

The insertion / removal port 11 is provided with a lid 11a that is closed before and after the optical disk 12 is inserted, and prevents dust and the like from entering the main body 13 from the insertion / removal port 11.
The pair of insertion / removal rollers 14 and 14 are fixed at a predetermined interval to a shaft 15 that is driven to rotate in the forward and reverse directions by a driving unit (not shown) that is operated by the control of the control unit 5. A free roller (not shown) is provided below the pair of insertion / removal rollers 14 and 14 (on the back side in the direction perpendicular to the paper surface in FIG. 2) to press and hold the optical disk 12 against the insertion / removal roller 14. Between the optical disc 12 and the optical disc 12 so as to be rotatable with a narrower spacing than the thickness of the optical disc 12.
Accordingly, the shaft 15 is rotationally driven by the driving means, and the optical disk 12 is inserted / removed by the cooperation of the pair of insertion / removal rollers 14 and 14 and the free roller.

The peripheral edge detection means 20 is disposed between the center CP (see FIG. 4) of the storage position for storing the optical disk 12 inside the main body 13 and the insertion / removal port 11. The peripheral edge detection means 20 is a mechanical sensor that can come into contact with the peripheral edge 12a of the optical disk 12, and is provided in a pair along a direction that intersects the insertion / removal direction of the optical disk.
That is, as shown in FIG. 2, peripheral detectors 21L and 21R are provided on the left and right sides in the optical disc insertion / removal direction (indicated by arrows in FIG. 2) on the inside of the main body 13 of the pair of insertion / removal rollers 14 and 14, respectively. The peripheral edge detectors 21L and 21R detect the peripheral edge 12a of the optical disc 12.

Here, each of the peripheral detectors 21L and 21R is a rotary position detector 22L in which a rotary shaft 22a is arranged in a direction orthogonal to the optical disk surface 12b of the optical disk 12 to be accommodated (in the direction orthogonal to the paper surface in FIG. 2). 22R, and arms 23L and 23R which are provided on the rotation shaft 22a and can contact the peripheral edge 12a of the optical disk 12. At the tip of each arm 23L, 23R, a detection roller 24 that is in contact with the peripheral edge 12a of the optical disc 12 is rotatably provided. Both arms 23L, 23R are in a direction to press the detection roller 24 against the peripheral edge 12a of the optical disc 12. For example, it is always biased by biasing means such as a spring.
Therefore, the detection roller 24 comes into contact with the peripheral edge 12a of the optical disk 12 by inserting and removing the optical disk 12, and the arms 23L and 23R are rotated about the rotation shaft 22a. The rotary position detectors 22L and 22R control the rotation angles θL and θR from the initial positions of the arms 23L and 23R as changes in resistance values or currents and voltages as the arms 23L and 23R change. Output to.

Here, as shown in FIG. 2, in the right edge detector 21R, the arm 23R is connected to the first arm 23a attached to the rotating shaft 22a of the rotating position detector 22R, and the bent portion. The second arm 23c is rotatably connected to the tip of the first arm 23a by a hinge 23b.
Below the first arm 23a and the second arm 23c, a guide plate 25 is provided in parallel with the optical disk surface 12b, and the guide plate 25 is provided with a guide groove 25a.

On the lower surface of the second arm 23 c, for example, a lower end portion of a rotation shaft of the detection roller 24, a protrusion provided separately, and the like protrude and are fitted in a guide groove 25 a of the guide plate 25. Accordingly, the detection roller 24 is movable only along the guide groove 25a, and the rotation shaft of the rotation type position detector 22R is in a state where the first arm 23a and the second arm 23c are folded at the hinge 23b. It rotates around 22a.
A state where the detection roller 24 is positioned at the right end of the guide groove 25a in FIG. 2 is an initial position, and the detection roller 24 is always urged so as to return to the initial position.
Similarly, in the left peripheral detector 21L, the position shown in FIG. 2 is the initial position, and the detection roller 24 and the arm 23L are always urged to return to this position.

Next, the type and state of the optical disk 12 detected by the peripheral edge detection means 20 will be described with reference to FIGS.
FIG. 2 shows an optical disk insertion waiting state before the optical disk 12 is inserted into the reproduction position. In this state, the optical disk 12 inserted from the insertion / removal port 11 and started to be inserted into the main body 13 by the insertion / removal roller 14 contacts only the detection roller 24 of the right edge detector 21R, for example, and the right arm 23R is moved. It is in a rotating state (detection angle = θR). Note that the positions of the detection roller 24 and the arm 23R indicated by the two-dot chain line in FIG. 2 indicate the initial positions. It has not yet contacted the detection roller 24 of the left peripheral detector 21L, and the arm 23L is not yet rotated at the initial position. That is, the detection angle θL is zero.
This state is the same as the state in the middle of taking out the optical disk 12 from the inside of the main body 13.

FIG. 3 shows a state in which the maximum diameter of the optical disk 12 having an outer diameter of 12 cm is detected. That is, the sum of the detection angles θL and θR increases up to this state, and then the sum of the detection angles θL and θR starts to decrease, which indicates that the detection angles θL and θR detect the maximum values. As a result, it can be seen that the outer diameter of the optical disk 12 is equivalent to 12 cm.
Here, the reason why it is equivalent to 12 cm is that it does not matter whether or not the detected outer diameter of the optical disk 12 is exactly 12 cm, and it is only necessary to know that the inserted optical disk 12 is a 12 cm optical disk. .

FIG. 4 shows a state where the optical disk 12 has been normally drawn to the reproduction position and the drawing has been completed. In this case, the arms 23L and 23R of the left and right peripheral edge detectors 21L and 21R are returned to the initial positions, and the detection angles θL and θR are both zero.
In this state, the rotation of the insertion / removal roller 14 is stopped, and the optical disk 12 is reproduced and stored.

FIG. 5 shows a state in which the 8 cm optical disk 16 is inserted. The state shown in FIG. 5 shows a state in which the maximum diameter of the 8 cm optical disk 16 is detected, and the detection angles θL and θR start to decrease thereafter.
Then, it is detected from the detection angles θL and θR that the maximum diameter of the optical disk is equivalent to 8 cm. In this case, the control unit 5 determines that the inserted optical disk is not a proper optical disk, and reverses the insertion / removal roller 14 to eject the optical disk 16.

  FIG. 6 shows a case where the insertion of the 12 cm optical disk 12 is incomplete. In this case, the optical disk 12 is not inserted to the farthest and is shifted forward (downward in FIG. 6) as compared to the fully inserted state (see FIG. 4). Therefore, for example, in the left peripheral detector 21L, since the detection roller 24 has returned to the initial position, the detection angle θL becomes zero, but the detection roller 24 of the right peripheral detector 21R has not returned to the initial position. The detection angle θR is not zero. If the detected angle θR is not zero even after this state has elapsed for a certain time, the controller 5 determines that an abnormality has occurred and reverses the insertion / removal roller 14 to eject the optical disk 12.

FIG. 7 shows a state where an optical disc 17 having a defect in the outer shape is inserted. For example, in the case where the missing portion 17a is provided, when the detection roller 24 moves along the missing portion 17a, the detection angle θR increases or decreases, so that it is determined that the optical disc 12 is not normal.
In this case, the controller 5 determines that the inserted optical disk is not an appropriate optical disk, and reverses the insertion / removal roller 14 to eject the optical disk 17. In the case of a deformed optical disk such as a heart shape, for example, it is similarly detected and ejected.
In FIG. 7, the case where the missing portion 17a on the right side of the optical disc 17 is detected by the right edge detector 21R has been described. Needless to say, it is detected because the detection angle θL detected at 1 increases or decreases.

FIG. 8 shows a state in which two optical disks 12 and 12 are inserted. In this case, even if one of the optical disks 12 is completely pulled to the reproduction position, the other optical disk 12 has not reached the reproduction position. Therefore, at least one of the detection rollers 24 of the left and right edge detectors 21L and 21R It has not returned to the initial position.
For this reason, a detection angle arises in at least one of the peripheral detectors 21L and 21R. Even in this case, the controller 5 determines that an abnormality has occurred, and reverses the insertion / removal roller 14 to eject the two optical disks 12 and 12.

Next, the optical disk shape detection operation will be described based on the flowchart of FIG. When started (step SS), for example, the insertion / removal roller 14 is rotated in the retracting direction by pressing the storage start button 6 or by pressing the lid 11a of the insertion / removal port 11 with the optical disk 12 (step S1). In this state, one optical disk 12 is inserted from the insertion / removal port 11 (step S2).
As a result, the optical disk 12 is drawn into the optical disk apparatus 10, contacts the detection rollers 24 of the arms 23L and 23R of the left and right peripheral edge detectors 21L and 21R, and rotates both arms 23L and 23R (step S3).
Detection angles θL and θR of the rotational position detectors 22L and 22R generated according to the rotation amounts of both the arms 23L and 23R are transmitted to the control unit 5. The controller 5 determines whether or not the sum of the detected angles θL and θR from both arms 23L and 23R has started to decrease beyond the peak (step S4).

If the sum of the detected angles θL and θR from the rotary position detectors 22L and 22R has not yet started to decrease, the detected angles θL and θR are stored for every predetermined time Δt (step S5), and step Returning to S4, it is monitored whether or not the sum of the detected angles θL and θR exceeds the peak.
In step S4, when it is determined that the sum of the detected angles θL and θR exceeds the peak and starts to decrease, the sum of the detected angles θL and θR from the rotary position detectors 22L and 22R is calculated. It is determined whether or not the peak corresponds to 12 cm (step S6).
Here, as described above, it is not a matter of detecting whether or not the length is exactly 12 cm, but because whether or not it can be regarded as a 12 cm optical disk 12 is a problem, it is determined whether or not it is equivalent to 12 cm. .
If it does not correspond to 12 cm, it is determined that the optical disk is not a 12 cm optical disk but an 8 cm optical disk (see FIG. 5), for example, and the insertion / removal roller 14 is reversed in the ejection direction (step S7). (Step S8), and the process ends (Step SE).

On the other hand, if it is determined in step S6 that the peak of the sum of the detection angles θL and θR from the rotary position detectors 22L and 22R corresponds to 12 cm, the stored detection angles θL and θR and the arm The shape of the optical disk 12 is calculated and estimated from the time T0 from when 23L and 23R start to rotate (step S9).
From the result, it is determined whether or not the circular shape has an outer diameter of 12 cm (step S10). If it is determined that the circular shape is not 12 cm, for example, a missing optical disk (see FIG. 7), an irregularly shaped optical disk, or the like. Then, the controller 5 rotates the insertion / removal roller 14 in the ejection direction (step S7), ejects the optical disk 12 (step S8), and ends (step SE).

On the other hand, if it is determined in step S10 that the optical disk 12 is 12 cm, it is determined whether or not the optical disk 12 has reached the pull-in completion position (step S11). If not, the optical disk 12 is inserted. Then, it is determined whether or not a predetermined time has elapsed (step S12).
If the predetermined time has elapsed (timeout), for example, it is determined that the drawing is incomplete (see FIG. 6), for example, and the process proceeds to step S7 where the insertion / removal roller 14 is rotated in the ejection direction and the optical disk 12 is ejected. (Step S8), the process ends (Step SE).
If the predetermined time has not elapsed, the process returns to step S11, and the insertion / removal roller 14 is continuously rotated in the pull-in direction to monitor whether or not the optical disk 12 has reached the pull-in completion position.

If it is determined in step S11 that the optical disk 12 has reached the drawing-in completion position, it is determined whether the arms 23L and 23R have returned to the initial position (step S13). As described above, the drawing operation is terminated as the optical disk 12 has been normally inserted (step S14).
On the other hand, if the arms 23L and 23R have not returned to the initial positions, for example, as described with reference to FIG. 8, it is determined that an abnormality such as the insertion of two sheets has occurred, and the process moves to step S7 and the insertion / removal roller 14 is discharged. The optical disk 12 is ejected (step S8), and the process ends (step SE).

  As described above, according to the optical disk apparatus 10 of the embodiment of the present invention, the peripheral edge 12a of the optical disk 12 is detected using the rotational position detectors 22L and 22R which are mechanical sensors as the peripheral edge detection means 20. Therefore, the peripheral edge 12a of the optical disk 12 can be continuously detected by a simple mechanism, and the outer diameter, shape, and insertion state of the inserted optical disk 12 can be easily detected.

  In the above description, an optical disk device dedicated to a 12 cm optical disk has been described as an example. Therefore, in the optical disk device of the present embodiment, when it is detected that an optical disk other than a 12 cm optical disk has been inserted, the optical disk is ejected. In addition, the control is performed so as to shift to the ejecting operation, but the present invention may be applied not only to a 12 cm optical disk but also to an apparatus capable of recording / reproducing an 8 cm optical disk or a modified optical disk. For example, if the optical disc apparatus has a tray for an 8 cm optical disc or a deformed optical disc provided separately from a tray for a 12 cm optical disc, the optical disc is used as a tray for an 8 cm optical disc or a variant optical disc. It ’s time to move It may be set such as control.

  In the above-described embodiment, one arm 23L is used for the left peripheral detector 21L, and the two arms 23a and 23c are connected to the right peripheral detector 21R by a hinge 23b so as to be bent. Although the arm 23R is used, both the peripheral detectors 21L and 21R can use a single arm member to simplify the peripheral detection means. Alternatively, both the peripheral detectors 21L and 21R can be made more compact by using a bendable arm member.

  Furthermore, in the above description, although the example which comprised the periphery detection means 20 using the rotational position detectors 22L and 22R and the arms 23L and 23R was demonstrated, another periphery detection means can also be used.

As another type of mechanical peripheral edge detection means, for example, linear position detectors 26L and 26R shown in FIGS. 10 to 12 can be used. In addition, the same code | symbol is attached | subjected to the site | part which is common in embodiment mentioned above, and the overlapping description is abbreviate | omitted.
The linear position detectors 26L and 26R have sliding resistances 28L and 28R each having an arm 27L and 27R that can slide linearly by coming into contact with the periphery of the optical disk 12 as a detector. 27L and 27R are urged by the springs 29 toward the center origin position.
Therefore, when the optical disk 12 is inserted, the arms 27L and 27R at the center are pushed right and left to detect the outer diameter (here 12 cm) which is the maximum width of the optical disk 12, as shown in FIG. Can do. Similarly, as shown in FIG. 12, when the maximum distance between the arms 27L and 27R is 8 cm, it is detected that the optical disk 16 is 8 cm.

  Alternatively, as another method, a rotary encoder that outputs a pulse every time the shaft rotates by a certain amount is used, or photosensors are continuously provided in a row over the entire width, and detection light emitted from the light emitting unit is inserted. It is also possible to detect the outer diameter and shape of the optical disk 12 by detecting the peripheral edge 12a of the optical disk 12 when the optical disk is shielded from light.

  As described above, the optical disc apparatus according to the present invention can detect the outer diameter, shape, and insertion state of the inserted optical disc by providing the peripheral detection means for detecting the peripheral edge of the optical disc inside the main body. This is effective, and is useful as an optical disc apparatus or the like that discriminates the type and insertion state of an optical disc and ejects the optical disc when there is an abnormality.

1 is an overall perspective view of a car audio device incorporating an optical disk device according to an embodiment of the present invention. A plan view showing an optical disk insertion waiting state before the optical disk is inserted into the reproduction position The top view which shows the state which is detecting the maximum diameter in the optical disk of outer diameter 12cm The top view which shows the state where the optical disk was normally drawn to the reproduction position and the drawing was completed The top view which shows the state where the 8cm optical disk is inserted A plan view showing a case where insertion of a 12 cm optical disk is incomplete Plan view showing a state where an optical disc having a defect in its outer shape is inserted A plan view showing a state in which two optical disks are inserted Flow chart of optical disk shape detection operation (A) Plan view showing an example of an optical disk apparatus using a linear position detector and showing a state in the middle of inserting a 12 cm optical disk. (B) Front view seen from direction B in (A) (A) The top view which shows the state which is an example of the optical disk apparatus using a linear position detector, and has detected the maximum diameter of a 12 cm optical disk (B) The front view seen from the B direction in (A) A plan view showing a state during insertion of an 8 cm optical disk Plan view of main parts of a conventional optical disc apparatus Front view seen from XIV direction in Fig. 13

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical disk apparatus 11 Inserting / removing port 12 Optical disk 12a Perimeter 12b Optical disk surface 13 Main body 14 Inserting / removing roller (roller)
20 Periphery detection means 22a Rotating shaft 22L, 22R Rotating position detector (mechanical sensor)
23b Hinge (folded part)
23L, 23R Arm 26L, 26R Linear position detector (mechanical sensor)
27L, 27R arm

Claims (2)

A main body capable of storing an optical disk therein, an insertion / removal port through which the optical disk can be inserted into and removed from the inside of the main body, and the optical disk by rotating while sandwiching the optical disk provided inside the main body An optical disk device comprising a roller capable of being conveyed into the main body,
An optical disc which is provided with a plurality of peripheral edge detecting means for continuously detecting the position in contact with the peripheral edge of the optical disc inside the main body, and the peripheral edge detecting means is a mechanical sensor capable of contacting the peripheral edge of the optical disc. apparatus.   2. The optical disk apparatus according to claim 1, wherein the peripheral edge detection means is disposed between a center of a storage position for storing the optical disk inside the main body and the insertion / removal port.

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