JP4178695B2 - Disc recording / playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk reproducing apparatus for reproducing a signal recorded on an optical disk, and a disk recording / reproducing apparatus for recording and reproducing a signal on an optical disk.
[0002]
[Prior art]
Conventionally, there has been known an optical disk reproducing apparatus as disclosed in JP-A-6-295516.
[0003]
A conventional example will be described below.
[0004]
As shown in FIG. 16A, the upper door 200 is opened upward, and an MD (mini disk) or a CD (compact disk) is set for reproduction. FIG. 16B shows a reproduction state in which the MD 200 is set in the cartridge holder 201 in the state of FIG. 16A and the door 200 is closed, and FIG. 16A shows the cartridge holder 201 indicated by a virtual line in FIG. The cross section in a position is represented.
[0005]
In the state of FIG. 16B, the spindle motor 203 is connected to the disk 204 of the cartridge holder 201 and is driven to rotate, and the pickup 205 reads the disk 204.
[0006]
In the case of the CD 206, when the user sets the CD on the turntable 207 attached to the upper surface of the cartridge holder 201 in the state of FIG. 16A and closes the door 200, in this case, FIG. ), The spindle motor 203 is connected to the turntable 207, and the pickup 205 reads the CD 206.
[0007]
The recording media that appear in the following description are 12 cm CD, 8 cm CD, and MD cartridges, and their shapes are as shown in FIGS.
[0008]
FIGS. 17A and 17B show 12 cm CD3 and 8 cm CD4. Both have a center hole 5 in the center. The diameter of the center hole 5 is 15 mm.
[0009]
FIG. 18 shows the MD cartridge 1. An optical disk 2 having an outer diameter of 64 mm is accommodated inside. FIG. 19 shows the MD cartridge 1 as viewed from below. An opening 80 (indicated by a dotted line) for the optical pickup to access the optical disc 2 is covered with a sliding shutter 10 and has a structure in which the opening 80 appears by moving the shutter 10 during recording and reproduction. The opening 7 is an opening for placing the center of the optical disc 2 on the turntable. The positioning holes 8 and 9 used when positioning the MD cartridge 1 are located outside the outer diameter of the optical disk 2 inside the cartridge. The MD cartridge 1 has a short side dimension 6 of 68 mm and a long side dimension of 72 mm.
[0010]
[Problems to be solved by the invention]
In the apparatus shown in the above conventional example, the operation of setting the CD and MD in the apparatus is performed by opening the top door. This top-open mechanism has an operation space on the upper surface of the apparatus, and a front operation type compact apparatus cannot be constructed.
[0011]
This top-operated device has a limitation that it must be positioned at the top when various audio devices are stacked.
[0012]
The present invention is a front loading type device that has a disk tray that protrudes on the front surface of the device and has a CD tray on which CDs and MDs are loaded and loaded into the device. A thin device having no operation space above can be configured.
[0013]
In addition, the present invention is a front operation type front loading type apparatus that can perform both CD and MD, and is a simple and convenient disk recording / reproducing apparatus that does not let the user feel the difference between the reproduction media. It is intended to be realized with a mechanism.
[0014]
[Means for Solving the Problems]
The disc recording / reproducing apparatus of the present invention is provided with a CD mounting portion for placing a CD on the upper surface of the disc tray and restricting its position, and an MD placing portion for placing an MD cartridge and restricting its position. Either one of the CD and the MD is placed at a position protruding outward and carried into the apparatus.
[0015]
Furthermore, it has a detection means for detecting the state where the MD cartridge is placed on the MD placement portion, and when the state where the MD cartridge is placed is detected by this detection means, the state of the performance mechanism portion is set to CD. A switching mechanism for switching from the corresponding state to the state corresponding to the MD cartridge was installed. The detection means for detecting the state where the MD cartridge is mounted on the MD mounting portion includes a detection lever which takes two positions according to the presence or absence of the MD cartridge, and a path on which the disk tray operates in the apparatus loading direction. And a photo interrupter installed in When the disc tray moves in the apparatus loading direction, the photointerrupter detects passage or non-passage between the photointerrupters by the detection member, thereby detecting the placement or non-placement of the cartridge.
[0016]
With this configuration, either CD or MD can be placed on a disc tray that can be moved in and out on the front side of the apparatus, and can be carried into the apparatus. In addition, it is possible to detect the state in which the MD is placed on the MD placement portion when the detection lever passes the photo interrupter during loading, and the state of the performance mechanism portion can be changed from the state corresponding to the CD before completion of loading. The state corresponding to the MD cartridge can be switched, and the MD can be held by the performance mechanism unit and played immediately upon completion of loading.
[0017]
A front-operated front-loading system that can quickly play both CDs and MDs and realizes a highly convenient disc recording / playback device that does not make the user feel the difference between playback media with a simple mechanism. .
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The disc recording / reproducing apparatus according to claim 1 of the present invention is an apparatus for recording or reproducing on a CD and an MD housed in a cartridge case, wherein either one of the optical discs is placed at a position protruding outside the apparatus. A disk tray to be loaded into the apparatus, a CD mounting portion provided on the upper surface of the disk tray, on which a CD can be placed, and a position thereof being substantially regulated; and an MD cartridge provided on the upper surface of the disc tray, which can be placed; The MD cartridge is mounted by the MD mounting section, the detecting means for detecting the state where the MD cartridge is mounted on the MD mounting section, the performance mechanism section for holding and recording or reproducing the disc, and the detecting means. A switching mechanism for detecting the placed state and switching the state of the performance mechanism unit from a state corresponding to a CD to a state corresponding to an MD cartridge , Characterized in that the provided.
[0019]
According to a third aspect of the present invention, there is provided the disc recording / reproducing apparatus, wherein the switching mechanism for switching the state of the performance mechanism unit from the state corresponding to the CD to the state corresponding to the MD cartridge operates the disc tray in the device loading direction. Sometimes, in the state where the cartridge case is present, after the detection member passes between the photointerrupters and a signal is detected, the switching operation is completed while the loading operation of the disc tray is continued. And
[0020]
Hereinafter, the present invention will be described using examples. FIG. 1 is a schematic view of an embodiment of the apparatus of the present invention as viewed from above. It is the figure which excluded the clamper 87 periphery which fixes CD from upper direction. FIG. 2 is a schematic view of the mechanism as seen from the side (in the direction of arrow 70 in FIG. 1), and is schematically shown.
[0021]
In the state shown in FIG. 1, the disk tray 11 protrudes from the apparatus case 81 to the outside of the apparatus. In this state, one of the MD cartridge 1, 12 cm CD 3, and 8 cm CD 4 is placed on each disc placement portion of the disc tray 11.
[0022]
In FIG. 1, the mounting positions of the MD cartridges 1, 12 cm CD3, and 8 cm CD4 are indicated by a one-dot chain line. The disc tray 11 is formed with a 12 cm CD mounting portion 13, an 8 cm CD mounting portion 14, and a substantially square MD cartridge mounting portion 15.
[0023]
In FIG. 1, an opening 16 of the disc tray 11 is an opening for the optical pickup 20 to access the disc when the disc tray 11 moves onto the optical deck 25 at the performance position. The disc tray 11 at the protruding position is driven by the disc tray drive mechanism 83 and moves from the outside of the apparatus into the apparatus. FIG. 1 shows only the disc tray drive gear 84 of the disc tray drive mechanism 83. The drive motor 180 is a drive motor that drives the disc tray drive mechanism 83. A rack 181 that meshes with the disk tray drive gear 84 in the longitudinal direction is formed on the disk tray 11 as shown in FIG.
[0024]
The detection lever 50 attached to the back surface of the disc tray 11 is pivotally supported at its fulcrum 51 so as to be rotatable in the vertical direction with respect to the disc tray 11. The central axis of the fulcrum 51 is parallel to the disc placement surface of the disc tray 11. A part 52 of the detection lever 50 is exposed on the upper surface of the disc tray 11 through the opening 53, and is configured to contact a part of the MD cartridge 1 when the MD cartridge 1 is placed.
[0025]
FIG. 3 shows a layout of the detection lever 50 as viewed from the arrow 71 in FIG. It is the figure seen in cross section. One end 54 of the detection lever 50 is a weight, and a part 52 is projected from the opening 53 via the fulcrum 51 in a free state. Similarly, the other end portion 55 of the detection lever is in a state of being positioned upward in a free state by the weight 54. FIG. 4 shows the state of the detection lever 50 when the MD cartridge 1 is placed on the disc tray 11. FIG. 4 shows a state in which the disc tray 11 starts to move into the apparatus according to the user's disc tray closing instruction and has advanced by 30 mm. When the MD cartridge 1 is placed on the disc tray 11, due to the weight of the MD cartridge 1, the part 52 of the detection lever 50 is pushed down by the MD cartridge 1 to the lowered position, and the end portion 55 is similarly moved to the lowered position. Become.
[0026]
In the state of FIG. 3, that is, in the state where the MD cartridge 1 is not placed, the end portion 55 of the detection lever 50 is above and passes above the photo interrupter 56. When the disc tray 11 performs the closing operation, the end 55 does not pass through the photo interrupter and no signal is generated.
[0027]
On the other hand, in FIG. 4, that is, in the state where the MD cartridge 1 is placed, the end 55 of the detection lever 50 is in the lowered state, and the end 55 passes through the inside of the photointerrupter 56 and a signal is generated in the photointerrupter 56. To do. In FIG. 4, the end 55 is positioned between the photo interrupters 56 in a state where the disc tray 11 has advanced 30 mm into the apparatus. 5A and 5B show a single view of the photo interrupter 56 (FIG. 5A is a top view and FIG. 5B is a side view). The photo interrupter 56 has a U-shape, and the light receiving element 57 and the light emitting element 58 face each other. Due to the movement of the disc tray 11, the end 55 passes between the light receiving element 57 and the light emitting element 58. At this time, the MD cartridge 1 is placed with the gap between the light emitting element 58 and the light receiving element 57 blocked. Is detected.
[0028]
1 and 2, an optical deck 25 is arranged as a performance mechanism in the apparatus. The optical deck 25 is equipped with a disk motor 23 that rotationally drives CDs and MDs, an optical pickup 20 that reads signals, and the like. An MD turntable 22 is press-fitted and fixed to the rotating shaft of the disk motor 23.
[0029]
The case of playing a CD will be described. 1, after the user places 12 cm CD3 to 8 cm CD4 on the 12 cm CD placing portion 13 or the 8 cm CD placing portion 14 of the disc tray 11, the user gives an instruction to carry the disc tray 11 into the device. Not) through.
[0030]
At this time, the CD turntable 24 is set on the MD turntable 22 of the optical deck 25 as shown in FIG.
[0031]
Since CD and MD have different disc center hole diameters of 15 mm and 11 mm, CD and MD have different turntable center diameters. The CD turntable 24 used only for CD performance has an inner diameter of 11 mm, and has a shape that can be set with a small clearance on the center diameter of 11 mm of the MD turntable so that the axes coincide with each other. FIG. 6 shows a single view (top view, central sectional view) of the CD turntable 24. The CD turntable 24 rests on the MD turntable 22 and rotates integrally.
[0032]
The CDs 3 to 4 on the disc tray 11 are conveyed to a position where the center thereof coincides with the disc motor 23 on the optical deck 25 by the loading operation of the disc tray 11. 7, 8, and 9 are views of the state in which the CD 3 is loaded and the disk tray 11 has been moved into the apparatus as viewed from above and from the side. 8 is a view seen from the direction of arrow 73 in FIG. 7, and FIG. 9 is a view seen from the direction of arrow 74 in FIG. Thereafter, the optical deck 25 is raised vertically by a lifting mechanism 92 (not shown), and the CDs 3 to 4 are placed on the CD turntable 24. The magnetic body portion 91 at the center of the clamper 87 located at the top is magnetically attracted to the attracting magnet 90 at the center of the MD turntable 22, and the CDs 3 to 4 are held between the clamper 87 and the CD turntable 24. Is done. CDs 3 to 4 are rotationally driven by a disk motor 23, scanned by an optical pickup 20 or the like, and a reproducing operation is executed.
[0033]
FIG. 10 shows a state where CD 3 is held on the CD turntable 24. In the state in which CD3 is placed on the CD turntable 24, a gap 183 is formed between the disc tray 11 and CD3, and the disc tray 11 does not hinder the rotation of CD3.
[0034]
A photo interrupter 170 is installed below the optical pickup 20 on the optical deck 25. The optical pickup 20 is provided with a detection plate 171 corresponding to the photo interrupter 170. The detection plate 171 is between the light receiving and emitting elements of the photo interrupter 170 and blocks the optical path between the light emitting and receiving elements. The pattern of the output signal of the photo interrupter 170 corresponding to the movement of the optical pickup 20 is shown in FIG. In FIG. 11, the position (inner peripheral position) where the optical pickup 20 is closest to the disk motor 23 corresponds to the point 176. The optical pickup 20 moves in the disk outer circumferential direction (in the direction of arrow 75 in FIG. 11), and the outermost circumferential position corresponds to the point 177. The portion 172 where the signal changes is at a position substantially corresponding to the innermost peripheral position of the CD recording data. When playing a CD, the apparatus control unit sets the optical pickup 20 at a position 174 slightly inward from the change portion 172 as an initial position, and starts scanning the CD.
[0035]
Next, the case of playing MD will be described. In FIG. 1, after the user sets the MD cartridge 1 on the MD placement unit 15 on the disc tray 11, the disc tray 11 on which the MD cartridge 1 is placed in the apparatus is set to CD 3 by the disc tray moving mechanism 83 according to the user's carry-in instruction. The movement is started in the same manner as when placing. The position of the disc tray 11 where the convex portion 150 of the disc tray 11 pushes the switch 151 down through the lever 152 to turn it on is such that the end portion 55 of the detection lever 50 is located between the light receiving and emitting elements of the photo interrupter 56. Position.
[0036]
When the convex portion 150 of the disc tray 11 being moved into the apparatus turns on the switch 151 and the apparatus control unit (not shown) detects the rising signal, the apparatus control unit confirms the state of the photo interrupter 56. . Since the MD cartridge 1 is placed on the disc tray 11, the end 55 of the detection lever 50 is in the photo interrupter 56, and the light receiving element and the light emitting element are blocked. The apparatus control unit detects the interruption state of the photo interrupter 56 and detects that the MD cartridge 1 is on the disc tray 11. When the apparatus control unit detects that the MD cartridge 1 is present on the disk tray 11, the apparatus controls the state of the optical deck 25 corresponding to the CD while continuing to move the disk tray 11 into the apparatus. Execute the operation to switch to the state. Specifically, the CD turntable 24 on the MD turntable 22 is moved up and retracted in the apparatus.
[0037]
As shown in FIG. 6, the CD turntable 24 has an engaging claw 85 protruding downward. There are three engagement claws 85 in the circumferential direction. The engaging claw 85 is engaged with the peripheral edge 86 of the circular opening of the turntable holder 160. FIG. 12 shows only three turntable holders 160 and a CD turntable 24. FIG. Accordingly, the CD turntable 24 does not come off from the turntable holder 160 and the engaging claw 85 does not obstruct the circumferential direction. It is free to rotate. When the CD is played (when the CD turntable 24 is set on the MD turntable 22), the peripheral portion 86 and the engaging claw 85 are arranged so that the engaging claw 85 and the turntable holder 160 do not come into contact with each other during rotation. The interval is set. The turntable holder 160 is pivotally supported on the optical deck 25 by a rotating shaft 161. The direction of the pivoted shaft 161 is parallel to the advancing / retreating direction of the disc tray 11.
[0038]
The device controller rotates the turntable holder 160 about the rotation shaft 161 via a drive mechanism (not shown), disengages the held CD turntable 24 from the MD turntable 22, and lifts it upward. The CD turntable 24 is detached from the MD turntable 22 and retracted upward. The state is shown in FIG. FIG. 13 is a plan view of a state in which the disc tray 11 has loaded the MD cartridge 1 and completed loading into the apparatus. 14 is a view of the state of FIG. 13 viewed from the direction of arrow 76, and FIG. 15 is a view schematically viewed from the direction of arrow 77 of FIG.
[0039]
The CD turntable 24 is positioned on the MD cartridge 1, and further, the clamper 87 is positioned above the CD turntable 24. The operation of retracting the CD turntable 24 is performed in parallel with the movement of the disc tray 11 and before the side 162 of the MD cartridge 1 on the disc tray 11 reaches the position of the CD turntable 24. Complete. By making the shape of the detection lever 50 extended in the operation direction of the disc tray 11, it is possible to detect the placement of the MD cartridge 1 at an early stage, so that the operation of the disc tray 11 carried into the apparatus is not stopped. In addition, the retracting operation of the CD turntable 24 is completed without interfering with the MD cartridge 1 and the disk tray 11, and no extra time such as stopping of the disk tray 11 is required.
[0040]
In the operation of the 125 mm carry-in stroke of the disc tray 11, it moves 30 mm to detect the MD placement and starts the switching operation. The movement is completed by moving 72 mm, and the carry-in stroke is completed by moving 125 mm. Thereafter, the disk tray 11 is moved to a position where the disk center of the MD cartridge 1 substantially coincides with the position of the disk motor 23, and thereafter, the optical deck 25 is vertically raised by the lifting mechanism 92 (not shown) as in the case of CD. The MD disk 2 in the MD cartridge 1 is magnetically attracted and held on the MD turntable 22. The attracting magnet 90 at the center of the MD turntable 22 is attracted to the magnetic plate 185 at the center of the MD disk 2. The arm portion 165 of the turntable holder 160 is in a state of being accommodated in the concave notch portion 166 of the disc tray 11 while being inclined from the rotation shaft 161.
[0041]
The shutter 10 of the MD cartridge 1 is opened by a shutter opening / closing mechanism that will not be described in detail, and the optical pickup 20 can scan the MD disk 2. As with the CD, the disk motor 23 rotates and the reproducing operation is executed by the optical pickup 20 or the like.
[0042]
In FIG. 11, the signal changing portion 173 is a position that substantially corresponds to the innermost circumferential position of the MD recording data. The apparatus control unit sets the optical pickup 20 at a position 175 slightly inward from the change portion 173 as an initial position, and starts MD scanning. In FIG. 11, a position 178 is a position when the optical pickup 20 is located at the outermost peripheral position of the MD recording data. In FIG. 11, the movement range of the optical pickup 20 when scanning the MD disk is between point 175 and point 178.
[0043]
From the above, as an effect of the invention described in claim 1, it is possible to carry out the loading operation of the disc tray by having the detecting means for the MD cartridge 1 placed on the disc tray 11 while enabling the front loading by the disc tray. In parallel, the performance mechanism unit can be switched from the CD-compatible state to the MD-compatible state, so that the performance can be performed immediately after the disc tray loading operation is completed regardless of the disc type. Also, unlike the conventional example, the user can perform the CD and MD with the same operation.
[0044]
In addition, as an effect of the invention described in claims 2 and 6, the MD mounting state detection means has a shape in which the detection lever 50 is extended in the operation direction of the disk tray 11, and the disk tray 11 operates in the apparatus loading direction. Since the photo interrupter 56 is installed on the path, the MD cartridge mounting state can be detected at a position where the disc tray 11 sufficiently protrudes outside the apparatus. Therefore, before the MD cartridge 1 reaches the optical deck 25, the turntable can be switched from the CD compatible state to the MD compatible state with a sufficient operation margin, and in time parallel to the operation of the disc tray 11. Thus, the switching operation can be executed, and prompt MD performance is possible. Further, since the switching operation can be executed before the disc tray is fully accommodated, when the CD turntable 24 is retracted upward, it is not necessary to interfere with the disc tray and the MD cartridge. A simple retraction mechanism can be realized, and it is cheap and reliable.
[0045]
Unlike the present invention, in order to retract the CD turntable 24 on the MD turntable 22 after the MD cartridge 1 on the disc tray 11 has reached the upper side of the optical deck 25, the MD turntable 22 is removed from the upper side. Therefore, a complicated retraction mechanism that moves and retreats in the plane direction is required.
[0046]
Further, since the photo interrupter 56 of the detection means is installed not on the disc tray 11 but on the device on the disc tray operation path, it is not necessary to provide the photo interrupter 56 on the disc tray 11 which is a member for moving electrical wiring to the photo interrupter 56. The electrical wiring can be simplified, and the device is reliable, inexpensive, and easy to assemble.
[0047]
As an effect of the invention described in claim 3, the detection lever 50 passes between the photo interrupters 56 in the operation of the switching mechanism for switching the state of the optical deck 25 from the state corresponding to the CD to the state corresponding to the MD cartridge. Since the switching operation is completed while the loading operation of the disc tray 11 is continued after the detection signal is detected, the MD performance can be started more quickly than the switching operation after the loading of the disc tray. Can do.
[0048]
Further, as an effect of the invention described in claim 4, there is provided a switch 160 which operates in the position of the disc tray where the detection lever 50 is located between the photo interrupters 56 in conjunction with the detection of the MD loading state. Since the photo interrupter 56 signal is confirmed when the switch 160 is turned on, it is possible to reduce the probability of occurrence of an erroneous MD detection due to an abnormal operation of the detection lever 50 due to an unexpected influence such as external vibration. The certainty of operation is increased.
[0049]
Further, as an effect of the invention described in claim 5, when determining the initial operation position of the optical pickup 20, the innermost peripheral positions of the CD and MD recording data are different, but two positions (change portions) are changed by one photo interrupter. 172, 173) can be detected and is simple and inexpensive. When playing the MD, the optical pickup 20 scans across the innermost circumferential position of the CD (FIG. 11, changed portion 173), but the changed portion 173 is detected in a non-contact manner by the photo interrupter 170. As a result, the optical pickup 20 can be operated without causing unnecessary disturbances and load fluctuations due to detection of the inner circumference of the CD during scanning movement, and the stability of signal reading is improved. In the method of detecting the innermost circumferential position of the CD using a switch having a built-in spring, when the MD is played, a load fluctuation is caused in the scanning movement of the optical pickup 20 at the innermost circumferential position of the CD, the position of the optical pickup 20 corresponding to the changing portion 173 , Give a disturbance. This may cause a signal reading error. The photo interrupter can obtain the same effect even with a reflection type photo sensor.
[0050]
In addition, as an effect of the invention described in claim 6, the turntable holder 160 for rotatably holding the CD turntable 24 and moving it to the retracted position and the set position to the MD turntable is directly supported on the optical deck 25. Therefore, the positional relationship between the MD turntable 22 on the optical deck 25 and the CD turntable 24 on the turntable holder 160 is determined only by the dimensional accuracy of the turntable holder 160, and the setting position of the CD turntable can be made accurate.
[0051]
In addition, the shaft-supporting structure can easily process the dimensional accuracy of the hole and the shaft, can reduce the shaft backlash, and enables an accurate operation. Further, the turntable holder 160 is pivotally supported on the optical deck 25 by an axis parallel to the moving direction of the disc tray, and the turntable holder 160 is rotated upward about the rotation axis. Since the notch portion 166 is provided in the disc tray 11 so that a part of the turntable holder (arm portion 165) is substantially accommodated, the size of the turntable holder 160 in the apparatus depth direction can be reduced. The length of the device itself in the depth direction can be reduced. Reducing the size of the optical deck 25 in the depth direction has a great effect on reducing the size of the chassis 167 of the apparatus, and is effective in reducing the component cost.
[0052]
【The invention's effect】
A front operation type front loading type MD / CD shared player can be realized with a simple mechanism at low cost. It does not require an operation space on the upper surface, and it is thin and enables stacking of devices.
[0053]
Either recording medium can be set on the same disk tray, and a highly convenient apparatus that does not make the user aware of the difference in the recording medium can be obtained.
[0054]
Regardless of the disc type, performance can be performed immediately after the disc tray loading operation is completed. The user can perform both CD and MD with the same operation.
[0055]
The MD cartridge mounting state can be detected at a position where the disk tray 11 sufficiently protrudes from the apparatus, and the turntable switching from the CD to the MD can be executed in parallel with the operation of the disk tray 11 in a timely manner. Is possible.
[0056]
The switching mechanism from the CD to the MD can be a simple, inexpensive, and reliable mechanism in which the turntable holder is rotated upward.
[0057]
The electrical wiring for the photo interrupter 56 is not provided on the disk tray 11 which is a member for moving, and the electrical wiring can be simplified, resulting in a reliable, inexpensive and easy-to-assemble device.
[0058]
It is possible to reduce the probability of occurrence of an MD erroneous detection due to abnormal operation of the detection lever 50 due to unexpected influences such as external vibration, and the reliability of the operation of the apparatus is increased.
[0059]
The innermost peripheral position of CD and MD recording data can be detected easily and inexpensively. In addition, the optical pickup can be operated without causing unnecessary disturbances and load fluctuations during CD performance, and the stability of signal reading is improved.
[0060]
The switching mechanism from the CD to the MD can be made an accurate and dimensional accuracy mechanism, and an accurate operation is possible.
[0061]
The length in the depth direction of the optical deck 25 and the device itself can be reduced.
[Brief description of the drawings]
FIG. 1 is a top view of a disk recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a mechanism layout diagram of the disk recording / reproducing apparatus of FIG. 1 as viewed from the side (in the direction of arrow 70).
3 is a layout view of the detection lever 50 as viewed from the direction of arrow 71 in FIG.
4 is a view showing a state of a detection lever 50 when the MD cartridge 1 is placed on the disc tray 11. FIG.
FIG. 5 is a single view of a photo interrupter 56.
6 is a single view of the CD turntable 24. FIG.
FIG. 7 is a diagram illustrating a state in which a CD 3 has been loaded and the disk tray 11 has been moved into the apparatus.
8 is a diagram viewed from the direction of arrow 73 in FIG.
9 is a view seen from the direction of arrow 74 in FIG.
FIG. 10 is a diagram showing a state in which CD3 is held on the CD turntable 24;
FIG. 11 is a view showing a pattern of an output signal of the photo interrupter 170 corresponding to the movement of the optical pickup 20;
12 is a three-side view of the turntable holder 160 and the CD turntable 24. FIG.
FIG. 13 is a diagram showing a state in which the disc tray 11 has loaded the MD cartridge 1 and completed loading into the apparatus.
14 is a diagram of the state of FIG. 13 viewed from the direction of arrow 76. FIG.
15 is a diagram viewed from the direction of arrow 77 in FIG.
FIG. 16 is a configuration diagram of a conventional disk recording / reproducing apparatus and a cross-sectional view of a main part thereof.
FIG. 17 is a diagram showing 12 cm CD and 8 cm CD.
FIG. 18 is a diagram showing the MD cartridge 1
FIG. 19 is a diagram of the MD cartridge 1 as viewed from the bottom.
[Explanation of symbols]
1 MD cartridge
2 Optical disc
3 12cm CD
4 8cm CD
5 Center hole
7 Opening
8 Positioning hole
9 Positioning hole
10 Shutter
11 Disc tray
13 12cm CD placement part
14 8cm CD placement part
15 MD cartridge placement section
16 Disc tray opening
20 Optical pickup
22 MD turntable
23 Disc motor
24 CD turntable
25 Hikari Deck
50 detection lever
51 fulcrum 51
52 Part of the detection lever 50
53 opening
54 Weight
55 End of detection lever 50
56 Photointerrupter
57 Light receiving element
58 Light Emitting Element
70 arrows
71 arrow
72 arrows
73 Arrow
74 arrows
75 arrows
76 arrows
77 Arrow
80 opening
81 Equipment outer case
83 Disc tray drive mechanism
84 Disc tray drive gear
85 engaging claw
86 Perimeter of opening
87 Clamper
90 Magnet for adsorption
91 Magnetic body
92 Hikari Deck Lifting Mechanism
150 Convex part of disc tray 11
151 switch
152 Lever
160 Turntable holder
161 Rotation axis
162 Side of MD cartridge 1
165 Arm of turntable holder 160
166 A concave notch in the disc tray 11
167 chassis
170 Photointerrupter
171 Detection plate
172 The changing part of the signal
173 Signal changing part
174 Position slightly on the inner circumference side from the changing portion 172
175 Position slightly on the inner circumference side from the changing portion 173
176 Inner point of optical pickup 20
177 Peripheral point of optical pickup 20
178 Position when the optical pickup 20 is positioned at the outermost peripheral position of the MD recording data
180 Drive motor
181 racks
183 intervals
185 Magnetic plate

Claims (3)

An apparatus for recording or reproducing on a first optical disk and a second optical disk housed in a cartridge case,
A disk tray for placing one of the optical disks at a position protruding outside the apparatus and carrying it into the apparatus;
A first optical disk mounting portion provided on the upper surface of the disk tray and capable of mounting the first optical disk, the position of the first optical disk being substantially regulated;
A second optical disk mounting portion provided on the upper surface of the disk tray and capable of mounting a cartridge of the second optical disk and substantially regulating the position thereof;
Detecting means for detecting a state in which the cartridge is mounted on the second optical disk mounting portion;
A performance mechanism for holding and recording or reproducing the optical disc;
Wherein the state in which the cartridge is placed in the by sensing means second optical disc is detected, the playing mechanism of the state has been the second housed in the cartridge case from the state corresponding to the first optical disk A switching mechanism for switching to a state corresponding to the optical disc;
Equipped with a,
The detecting means has a shape extending in the operation direction of the disc tray and takes two positions depending on whether or not the cartridge case is mounted, and a diameter at which the disc tray operates in the apparatus loading direction. A photointerrupter installed on the road, and when the disc tray operates in the device loading direction, the photointerrupter detects passage between the photointerrupters by the detection member, non-passage, disk recording and reproducing apparatus characterized by detecting mounting of the cartridge, the non-mounting. The switching mechanism detects the state where the cartridge is placed by detecting the member passing between the photo interrupters when the disk tray moves in the apparatus loading direction. 2. The disc recording / reproducing apparatus according to claim 1, wherein the switching operation is completed while the carry-in operation is continued. The switch means further comprising a switch means that operates at a disk tray position where a part of the detection member is positioned between the photo interrupters in conjunction with the position of the disk tray when the disk tray operates in the apparatus loading direction. Disc recording and playback device.

Images