JP2005310200A - Disk unit and reproduced state adjusting method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk unit constructed to perform reproduction while mainitaining the locked state of a reproduction part after the assembling completion of the disk unit and thus capable of stabilizing the inclined angle adjustment of a reading means with respect to a disk surface by operating an inclined angle adjusting means by fixtures inserted from the outside of the unit, and to provide a reproduced state adjusting method for the disk unit. <P>SOLUTION: This unit is provided with a control part for clamping a disk on a turntable upon reception of an assembling mode signal, and then changing to a reproduced state while holding a reproduction part in a locked state, and a fixture insertion window for operating an inclined angle adjusting means from the outside of a case in this reproduced state to adjust the inclined angle of a reading means with respect to a disk surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk device for reproducing information stored on a disk, and more particularly to a disk device mounted on a movable object such as an automobile and a method for adjusting a reproduction state of the disk device.

  This type of conventional disk device, for example, as shown in Patent Document 1, supports an optical pickup as a reading means so as to be movable by a feed screw shaft and a guide shaft that are parallel to each other. The skew adjustment means is provided between the feed screw shaft and the chassis to adjust the skew.

  Also, in a disc apparatus equipped with a relative tilt angle adjusting mechanism between the disc and the playback unit, a signal output (jitter) from the reference disc is supplied by energizing an optical pickup as a reading means for reading disc information and a stepper motor that moves the optical pickup. After adjusting the reproduction unit through an adjustment process for adjusting the guide shaft of the optical pickup, the step motor, etc. to the angle at which the reproduction is optimal, the reproduction unit is incorporated into the disk device.

Japanese Patent Laid-Open No. 11-224438 (paragraph 0038, FIG. 1)

  As described in Japanese Patent Application Laid-Open No. 2004-228620, the conventional disk device has a complicated structure and a complicated adjustment because skew adjustment is performed for the feed screw shaft and the guide shaft that are parallel to each other. In addition, when the playback unit is adjusted and then assembled to the device, the playback unit adjustment process is entered in the middle of the assembly process, and both adjusted and unadjusted products may be mixed, reducing product quality. It leads to. In addition, there is a problem that the (laser diode) of the optical pickup is likely to be destroyed or deteriorated during the assembly process, leading to a reduction in product quality.

  The present invention has been made to solve the above-described problems. While the playback unit is in the playback position and the playback unit is locked, the disc is played back while the playback unit is locked, and the device is assembled with the tilt adjustment mechanism from the outside of the device. The purpose is to stabilize the product quality by adjusting the tilt angle in the completed state.

  The disc device according to the present invention has a reading means for reading stored information on the disc and a turntable on which the disc is placed, a reproducing unit which is in a floating state when the disc is reproduced, and is locked when not reproduced, and the reading means Moving means for moving the disk in the radial direction of the disk along the surface of the disk, tilting adjusting means for changing the tilting angle of the moving means with respect to the disk surface, and when receiving an assembly mode signal, the turntable After the disc is clamped above, the control unit that shifts to the playback state while holding the playback unit in the locked state, and the moving unit is moved to the disk by operating the tilt angle adjusting unit from the outside of the housing in the playback state. A jig insertion window provided in the housing so as to be inclined with respect to the surface is provided.

  In the disk device reproduction state adjusting method according to the present invention, the reproduction unit having a reading means for reading stored information on the disk and a turntable on which the disk is placed is moved from the retracted position to the reproduction position in the locked state, After holding the disk on the turntable, it was unlocked to float, the disk was rotated and the reading means was moved in the radial direction of the disk, and an assembly mode signal was given. When the reproducing unit is in a locked state, the reproducing operation is performed, and the tilting angle of the reading unit with respect to the disk surface is adjusted so as to obtain the best reproducing state while performing the reproducing operation.

  According to the present invention, when the assembly mode signal is received in the reproduction state after the completion of the assembly of the disk device, the disk is clamped on the turntable, and then the reproduction operation is performed while the reproduction unit is held in the locked state. In this playback state, when the tilt angle adjusting means is operated from the outside of the apparatus, the playback unit is in a locked state. Therefore, the tilt angle adjusting means is operated by a jig inserted from the outside of the apparatus to read the disk surface. The tilt angle can be stably adjusted, and there is an effect that it is possible to obtain a disk device and a reproduction state adjusting method for the disk device with stable product quality.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the playback unit, FIG. 2 is a perspective view of the playback unit with the clamp means removed, FIG. 3 is a perspective view showing the playback unit support plate and its associated mechanism in the retracted state, and FIG. 3 is a plan view of the mechanism unit, FIG. 5 is a perspective view showing a state in which the playback unit support plate is rotated to the playback position and the mechanism unit related thereto, and FIG. 6 is a plan view of the mechanism unit of FIG. 7 is a perspective view showing a state in which the reproducing unit support plate is rotated to the reproducing position and the disk is clamped on the turntable and a mechanism unit related thereto, and FIG. 8 is a plan view of the mechanism unit in FIG. FIG. 10 is a perspective view showing a disk reproducing state in which the reproducing unit support plate is rotated to the reproducing position and a mechanism unit related thereto, FIG. 10 is a plan view of the mechanism unit in FIG. 9, and FIG. 11 is a schematic diagram of a control circuit. . FIG. 12 is a flowchart for explaining the operation, and FIG. 13 is a schematic diagram of the tilt angle adjusting means.

  A motor 201 as a drive source, and a first rotating body 203 and a second rotating body 204 to which power of the motor 201 is supplied via a gear train 202 are provided on the bottom plate of the housing not shown. Yes. The first rotating body 203 is formed with a spiral cam groove 203a, and the second rotating body 204 is formed with four cam grooves 204a, 204b, 204c, and 204d that are independent from each other. These gear group 202 and first and second rotating bodies 203 and 204 are rotatably supported on the bottom plate of the casing.

  The cam groove 204 a has an intermediate portion and both end portions formed in a concentric circular arc shape with the second rotating body 204, and a connecting portion connecting both the portions is formed in the radial direction of the second rotating body 204. A first mechanical drive lever (hereinafter abbreviated as a first drive lever) (not shown) is engaged with the cam groove 204a.

  The cam groove 204b is formed in a semicircular arc shape with a radius substantially the same as that of the cam groove 204a on the side opposite to the cam groove 204a. Then, a pin 310a provided in an intermediate portion of a second mechanical drive lever (hereinafter abbreviated as a second drive lever) 310 as a shutter drive lever disposed below the second rotating body 204 in the cam groove 204b. Are engaged, and one end of the second drive lever 310 is rotatably supported by one gear shaft in the gear train 202.

  The cam groove 204c is formed in a semicircular arc shape so that one end side is the outer peripheral side of the second rotating body 204 and the other end side is the center side of the second rotating body. The cam groove 204c engages with a pin 213a provided at an intermediate portion of the sensor driving lever 213 disposed below the second rotating body 204, and one end of the sensor driving lever 213 is attached to the bottom plate of the casing. The shaft 213b is rotatably supported. The bifurcated portion 213b formed at the other end (tip) of the sensor drive lever 213 changes the signal amount obtained by the position of the line sensor (movable piece), and determines the operation state of the apparatus based on the signal amount. The movable piece 214a of the slide sensor 214 is engaged.

  The cam groove 204d is formed in a semicircular arc shape around the axis of the second rotating body 204, and is bent from the middle so that one end side thereof approaches the axis. The cam groove 204d is engaged with a pin 510a provided at an intermediate portion of a third mechanical drive lever (hereinafter referred to as a third drive lever) 510 (not shown), and one end of the third drive lever 510 is A shaft 510b provided on the bottom plate of the housing is rotatably supported.

  The reproduction unit 200 includes a reproduction unit support plate 503 and a support plate 504, and both plates are fitted to a shaft 101a that has a hole 503a provided at one end (the hole of the support plate 504 is not shown) on the bottom plate of the housing. It can be rotated freely.

  The reproduction unit support plate 503 is formed with a cam groove 503b that engages with a pin 501c provided on the rotation lever 501, and shock absorbers 503c are provided on both sides and a base end of the tip. A notch groove 503d that engages with the disk centering positioning member 103 provided on the bottom plate of the housing is formed in the vicinity of the tip. Further, the lock members 505 and 506 having gears 505a and 506a meshing with each other are supported on the reproducing unit support plate 503 so that the vicinity of the gears can be rotated by the rotation shafts 505b and 506b. Engagement portions 505c and 506c having engagement recesses are vertically bent at the free ends of the lock members 505 and 506.

  The support plate 504 is formed with holes 504b that engage with the upper part of the shock absorber 503c on both sides and the base end of the front end portion, and a turntable 507 is provided in the vicinity of the front end to place and rotate the disk. ing. The turntable 507 is provided on the axis of a disk-type motor 512 a provided on the circuit board 512. A reading unit 513 (pickup) for reading the stored contents of the disc is supported by a feed screw shaft 551 disposed between the turntable 507 and the base end portion so as to be movable, and corresponds to the moving region of the reading unit 513. An information reading window 504d is provided on the support plate 504.

  The support member 552 provided at the base end portion is provided with a motor 553 and a gear train 554 for transmitting the driving force of the motor, and one of the gears of this gear train is provided with a gear 551a attached to the feed screw shaft 551. I'm engaged. Further, the support member 552 is provided with a tilt adjustment mechanism 555 of the feed screw shaft 551.

  Further, vertical bent pieces 508b on both sides of one end of the clamp plate 508 are supported on the vertical bent pieces 504c on both sides of the base end portion of the support plate 504 so as to be movable up and down by shafts 508c. A clamper 508a that presses and holds the disk on the turntable 507 is supported in a swingable manner, and a coil spring 509 that presses the clamper 508a against the turntable 507 is provided at the rear end of the clamp plate 508.

  As shown in FIG. 13, the tilt adjustment mechanism 555 includes a Z-shaped support provided on holding members 556 and 557 that are divided in the vertical direction to hold the proximal end side of the feed screw shaft 551 and a support plate 504. A member 558 and a screw member 559 screwed into the upper end piece 558a of the Z-shaped support member 558 are provided. Further, a jig insertion hole 560 for operating the screw member 559 is provided in the clamp plate 508 and the housing so as to face the screw member 559. By rotating the screw member 559, the base end side of the feed screw shaft 551 is moved. The angle of inclination with respect to the disk surface is changed by pressing, and the angle of the reading unit 513 that moves in the radial direction of the disk along the feed screw shaft 551 is changed with respect to the disk surface.

  The drive lever 511 that slides along the inner surface of the left side of the housing is connected to the tip of the third drive lever 510 by a pin 510b and a long hole 511a. The upper surface of the slide member 511 has a cam groove 511b for locking operation. A cam groove 511c for disc chucking operation is formed. Then, the pin 505d provided on the lock member 505 is engaged with the cam groove 511b for the lock operation, and the drive plate 520 of the clamp plate 508 and the connection plate (not shown) provided on the back surface of the support plate 504 are swingable. The pins provided on the connecting plate are engaged with the cam groove 511c for disc chucking operation.

Next, the operation will be described.
When the disk device is turned on and a disk is inserted into the device, when this disk insertion is detected by a sensor (not shown) (step ST1), a disk insertion / extraction unit unit (not shown) is received in response to this detection signal. The operation is started and the disk is transported (step ST2). When the disk is transported to a predetermined reproduction position, the disk transport is stopped in response to the detection signal (step ST3).

  On the other hand, when the first and second rotating bodies are rotated via the gear train 202 by the operation of the motor 201, the sensor driving lever 213 operates the line sensor 214 and the reproducing unit 200 is shown in FIGS. From the retracted position to the reproduction position in FIGS. 5 and 6 (step ST4). Then, the disk inserted at the reproduction position is placed on the turntable of the reproduction unit, and this disk is pressed and held on the turntable by a clamper as shown in FIGS. 7 and 8 (step ST5).

  In this state, the microcomputer 601 of the control circuit shown in FIG. 11 recognizes that the disk is clamped based on the signal amount from the line sensor 214 and determines whether the assembly mode signal is given from the control board 602 ( Step ST6). When the assembly mode signal is not given, the operation is continued as it is, and the movement of the drive lever 511 releases the lock of the reproduction unit 502 by the lock members 505 and 506 to enter the floating state (step ST7). The pickup 513 as the reading means is moved in the radial direction of the disk by the feed screw shaft 551 to perform the reproducing operation (step ST9).

  If YES in step ST6, an assembly mode signal is given, the drive of the motor 201 is stopped by a command from the microcomputer 601, and all mechanisms are stopped by stopping the rotation of the second rotating body 204. Stop the operation of the unit. As a result, although the drive lever 511 also performs the clamper operation by the clamping means, the subsequent operation cannot be performed, and the reproduction operation is performed while the reproduction unit 502 is continuously locked by the lock members 505 and 506 (step ST8). Step ST9).

  In the reproduction operation state with the reproduction unit 502 kept locked, a jig is inserted into the jig insertion hole 560 from the outside of the apparatus, and the screw member 559 is turned with the jig to reduce the pressing force at one end of the feed screw shaft 551. The inclination of the feed screw shaft is changed to change the inclination of the reading unit 513 so that the best reproduction sound can be obtained. After the adjustment, a locking agent such as an adhesive is applied to the screw member 559 from the jig insertion hole 560 so that the adjustment state does not change. In this case, applying the locking agent from the jig insertion hole 560 causes the regeneration unit 500 to be positioned at the regeneration position, so there is a risk that the locking agent may be applied to other components. Therefore, when the reproducing unit 500 is positioned at the retracted position, a locking agent application hole is provided on the side surface of the housing or the top surface of the housing so that the locking agent can be applied, There is no fear of this, and it is easy to apply the locking agent, and it is easy to check the application state.

  As described above, according to the first embodiment, the disc surface is set so that the reproduction sound is good while performing the reproduction operation in a state where the reproduction unit of the reproduction unit is locked after the reproduction unit is assembled to the apparatus. Since the inclination angle of the pickup with respect to is adjusted, the assembly process can be separated and the adjustment process can be executed, and the product quality can be stabilized.

  Further, since the playback operation is performed while the playback unit is locked at the time of adjustment, the screw member 559 is operated by a jig when the playback unit is in a floating state in which the playback unit is unlocked as in normal playback. Although it is difficult to perform the operation of the screw member 558 using a jig, the operation of the screw member 558 can be performed stably and easily when the reproducing operation is performed while the reproducing unit is locked during adjustment as in the first embodiment. it can.

  Furthermore, when the reproducing unit is retracted to the retracted position along the casing side plate, a screw for applying a locking material is provided on the side of the casing or the top of the casing so as to face the screw member. It is easy to lock the member, and it is easy to check the application state.

Hereinafter, an example of a disk apparatus to which the present invention is applied will be described with reference to the drawings.
14 is an external perspective view of the apparatus main body 100, FIG. 15 is a perspective view showing the inside of the casing 101 with the top plate 102 removed, FIG. 16 is a plan view of FIG. 15, and FIG. It is a perspective view which shows the state which removed 101a.

  Inside the housing 101, a drive unit 200, a disk insertion / ejection unit 300, a disk changer unit 400, and a playback unit 500 are provided, and a number of cams are provided to operate these units in relation to each other. A lever or the like is provided. Each part will be described below with reference to FIGS.

Drive unit 200
The drive unit 200 includes a motor 201 as a drive source disposed at the back corner of the bottom plate 101e of the housing 101, a first rotating body 203 to which the power of the motor 201 is supplied via a gear train 202, and a first rotating body 203. Two rotating bodies 204 are provided. The first rotating body 203 is formed with a spiral cam groove 203a, and the second rotating body 204 is formed with four cam grooves 204a, 204b, 204c, and 204d that are independent from each other. The gear group 202 and the first and second rotating bodies 203 and 204 are rotatably supported by the bottom plate 101e of the housing 101.

  The cam groove 204 a has an intermediate portion and both end portions formed in a concentric circular arc shape with the second rotating body 204, and a connecting portion connecting both the portions is formed in the radial direction of the second rotating body 204. Then, as shown in FIG. 41, a pin 205a provided at an intermediate portion of an L-shaped first mechanical drive lever (hereinafter abbreviated as a first drive lever) 205 disposed under the second rotating body 204. Engages with the cam groove 204a, and one end of the first drive lever 205 is rotatably supported by a shaft 205b provided on the bottom plate 101e of the housing 101.

  The cam groove 204b is formed in a semicircular arc shape with a radius substantially the same as that of the cam groove 204a on the side opposite to the cam groove 204a. A pin 310a provided at an intermediate portion of a second mechanical drive lever (hereinafter abbreviated as a second drive lever) 310 as a shutter drive lever disposed under the second rotating body 204 is a cam groove 204b. One end of the second drive lever 310 is rotatably supported by one gear shaft in the gear train 202.

  The cam groove 204c is formed in a semicircular arc shape so that one end side is the outer peripheral side of the second rotating body 204 and the other end side is the center side of the second rotating body. Then, a pin 213a provided at an intermediate portion of the sensor driving lever 213 disposed under the second rotating body 204 is engaged with the cam groove 204c, and one end of the sensor driving lever 213 is connected to the bottom plate of the housing 101. It is rotatably supported by a column 213b provided on 101e.

  The cam groove 204d is formed in a semicircular arc shape around the axis of the second rotating body 204, and is bent from the middle so that one end side thereof approaches the axis. A pin 510a provided at an intermediate portion of a third mechanical drive lever (hereinafter referred to as a third drive lever) 510 disposed on the second rotating body 204 engages with the cam groove 204d, One end of the third drive lever 510 is rotatably supported by a shaft 510 b provided on the bottom plate 101 e of the housing 101.

  A pin 205b provided at the free end of the first drive lever 205 is engaged with a long hole 206a of a slide plate 206 that translates along the rear plate 101c of the housing 101. The cam grooves 206b, 206c, 206d, and 206e are formed, and an L-shaped cam groove 206f is formed on the rising surface of the slide plate 206 that is bent at a right angle. The rotation lever 207 has a column body 207a that engages with the cam groove 206b, and a disk detection plate 207b on the top of the column body 207a.

  On the other hand, a lever 208 having a pin 208a that engages with the L-shaped cam groove 206f is rotatably supported by the rear plate 101c of the housing 101. The lever 209 is connected to one end of the lever 207 through a pin 207c and an elongated hole 209a. The L-shaped lever 210 has an intermediate portion connected to the lever 209 by a rotating shaft 210a, a pin 210b provided at one end thereof is engaged with the groove 206e, and a pin 210c provided at the other end is bent by the slide plate 211. It is engaged with the bifurcated portion 211a.

  The slide plate 211 is provided so as to slide along the inner surface of the right side plate of the housing 101, and the slide plate 212 having the engaging portion 212 a that engages with the upper edge recess 211 b is the inner surface of the right side plate of the housing 101. It is provided to slide along. The slide plate 212 has a rack 212b and a bifurcated engagement portion 212c bent at a substantially right angle toward the inside of the housing.

Disc insertion / extraction unit 300
The disc insertion / ejection unit 300 includes a cam plate 301 that moves left and right along the inner surface of the housing front plate 101a. The cam plate 301 is formed with two cam grooves 301a and 301b on the left and right. The two shutters 302R and 302L have pins 302a and 302b that engage with the cam grooves 301a and 301b, respectively, and can be rotated so as to open and close a disk insertion / extraction port 303 formed in the front panel 101a. It is supported on the inner surface of the front plate.

  Further, a base plate 314 is provided above the disk insertion / removal opening 303 so as to protrude inward from the inner surface of the housing front plate 101a. The base plate 314 has linear guide grooves 314a to 314c at both ends. And an L-shaped guide groove 314d. A disc transport plate 315 is disposed below the base plate 314. The pins 315a to 315c provided on the upper surface of the disc transport plate 315 are passed through the guide grooves 314a to 314c, and the upper end portions thereof are caulked and removed. The disk transport plate 315 is suspended and supported by the base plate 314. An arc-shaped recess 315d that escapes the outer shape of the disk is formed at the center of the disk transport plate 315.

  A rotating lever 316 is attached to both ends of the disk conveying plate 315 by a shaft 316a. A disk conveying roller 317 is provided between the rotating levers 316 in parallel with the shaft 316a. An interval formed by the disc transport roller 317 coincides with the disc insertion / removal opening 303. Further, a power transmission gear 318 is provided on the shaft 317a of the disk conveying roller 317 protruding outside from one rotating lever 316, and a motor 319 attached to the gear 318 inside the housing right side plate 101b is provided. The gear train 320 that transmits the rotational force of the gears is engaged with the gear train 320. Further, the rotation lever 316 is provided with a guide pin 321 together with the gear 318, and the guide pin 321 is engaged with a cam groove 101g formed on the housing right side plate 101b.

  In addition, a lock lever 322 is rotatably supported on the upper surface of the disk transport plate 315 on the side where the gear train 320 is attached, and a pin 322 a provided on the lock lever 322 is an L-shape of the base plate 314. A bifurcated engaging portion 212 c of the slide plate 212 is engaged with a pin 322 b provided on the lock lever 322. Further, the rack portion 212 b formed on the slide plate 212 meshes with one gear in the gear train 320.

Disc changer unit 400
The disc changer unit 400 has three disc vertical moving bodies (hereinafter referred to as rotating shafts) at angular positions of approximately 0 °, 90 °, and 180 ° around the disc so as to act on the inserted disc 450. ) 401, 402, 403 are supported between the casing bottom plate 101d and the top plate 102. The rotary shafts 401, 402, and 403 are formed with small-diameter portions 401b, 401c, 402b, 402c, 403b, and 403c having a height capable of storing a predetermined number (for example, five) of disks 450 in the upper and lower portions. In addition, stepwise spiral grooves 401a, 402a, and 403a are formed on the outer peripheral surface of the intermediate large-diameter portion, respectively.

  In this case, the step-like spiral grooves 402a and 403a of the rear rotation shafts 402 and 403 have the same shape, but the step-like spiral groove 401a of the front rotation shaft 401 has a step H2 as shown in FIG. The shift from H to H3 is faster than the rotation shafts 402 and 403 on the back side, and with this configuration, the front side of the disk held at the timing when this step changes quickly becomes downward from the back side. The rotary shafts 401, 402, and 403 have gears 401d, 402d, and 403d at their upper ends, respectively, and one large-diameter gear 404 is engaged with the gears 401d, 402d, and 403d. In FIG. 42, H1 represents the playback unit entry height, H2 represents the disc chucking height, and H3 represents the playback unit retreat height. Further, M1 represents a playback unit entry mode, M2 represents a disk chucking mode, M3 represents a playback unit withdrawal mode, and M4 represents a disk insertion / ejection mode.

  The stocker 405 that supports the disk 450 is formed of a semi-arc-shaped sheet material that lacks the majority including the center, and the support members 406, 407, 408 is attached. Guide pins 409, 410, and 411 arranged in the vicinity of the rotation shafts 401, 402, and 403 are passed through the protrusions 406 a, 407 a, and 408 a that protrude outward from the support member 406, 407, and 408. Pins 406c, 407c, and 408c that engage with the holes 406b, 407b, and 408b and the spiral grooves 401a, 402a, and 403a of the rotation shafts 401, 402, and 403 are provided. In addition, mounting arms 407d and 407e for stocker leaf springs 215a and 215b are provided on the protruding portion 407a.

  With this configuration, the large-diameter gear 404 is rotated by receiving the driving force of the motor 418 via the gear train 419, so that the rotary shafts 401, 402, 403 are simultaneously rotated via the gears 401d, 402d, 403d, The stocker 405 moves up and down along the spiral grooves 401a, 402a, and 403a. In the process of this vertical movement, the disc held by the stocker 405 due to the difference between the step-like spiral grooves 402a and 403a of the above-described rear-side rotation shafts 402 and 403 and the step-like spiral grooves 401a of the front-side rotation shaft 401. There are times when the front side of 450 is facing down.

  On the other hand, a gear 412 that meshes with the large-diameter gear 404 close to the disc insertion port 303 side, a gear 413 that meshes with the gear 412, and a rock that has a pin 414 a engaged with an 8-shaped cam groove 413 a formed in the gear 413. The movable lever 414 is connected to the swing lever 414 via a pin 414b, and has a slide plate 415 that slides left and right along the housing front plate 101a, and a cam groove 416a that engages with the pin 415a of the slide plate 415. In addition, a slide plate 416 that slides up and down along the housing front plate 101a and a rotation plate 417 having a bifurcated portion 417a that engages with a pin 416b of the slide plate 416 at one end are provided.

  The gears 412, 413 and the swing lever 414 are supported by the top plate 102, and the slide plate 415 has pins 415b provided at the left and right ends thereof engaged with the horizontal elongated holes 420a of the housing front plate 101a. Further, the pin 416a provided on the slide plate 416 is engaged with a vertical elongated hole 420b formed in the housing front plate 101a.

  A gear train 422 that connects a gear 310b provided at the tip of the second drive lever 310 and a gear 421b provided at the lower portion of the disk guide member 421 is provided on a rotary bearing plate 423 that is pivotally supported by the housing bottom surface 101e. Yes. Further, the rotating plate 417 is rotatably supported by the vertically bent piece of the rotating bearing plate 423.

  The disk guide member 421 includes a shaft portion 421c having a gear 421b and an outer cylinder 421d fitted therein. The disk guide member 421 includes a clamping piece 421a that clamps the disk on the outer surface of the outer cylinder 421d, and a lower surface of the outer cylinder 421d. A pin 417b projecting from a rotating plate 417 is engaged with the portion, and the disk guide member 421 is provided so as to be rotatable and vertically movable by this configuration.

Playback unit 500
The playback unit 500 is rotatably supported by a shaft 110 provided at one end of the reproducing unit 500, and the planted pin 501b is engaged with the cam groove 203a of the first rotating body 203. 501 and a playback unit 502 that is driven from the retracted position outside the disk area to the disk playback position by the rotating lever 501. The reproduction unit 502 includes a reproduction unit support plate 503 and a support plate 504, and both plates are fitted rotatably by fitting holes 503a and 504a provided at one end to a shaft 110 standing on the bottom plate 101e of the housing 101. ing.

  The support plate 504 is formed with a cam groove 503b that engages with the pin 501c provided on the rotating lever 501, and shock absorbers 503c are provided on both sides and a base end of the tip. A notch groove 503d that engages with the disk centering positioning member 103 provided on the bottom plate 101e of the housing 101 is formed near the tip. Further, the lock members 505 and 506 having gears 505a and 506a meshing with each other are supported on the support plate 504 so that the vicinity of the gears can be rotated by the rotation shafts 505b and 506b. Engagement portions 505c and 506c having engagement recesses are vertically bent at the free ends of the lock members 505 and 506.

  The support plate 504 is formed with holes 504b that engage with the upper part of the shock absorber 503c on both sides and the base end of the front end portion, and a turntable 507 is provided in the vicinity of the front end to place and rotate the disk. ing. The turntable 507 is provided on the axis of a disk-type motor 512 a provided on the circuit board 512. A reading unit (pickup) 513 that moves between the base end portion and the tip end portion and reads out the stored contents of the disk 450 is provided.

  Further, vertical bent pieces 508a on both sides of one end of the clamp plate 508 are supported on the vertical bent pieces 504c on both sides of the base end portion of the support plate 504 so as to be movable up and down by shafts 508c. A clamper 508a that presses and holds the disk on the turntable 507 is supported in a swingable manner, and a coil spring 509 that presses the clamper 508a against the turntable 507 is provided at the rear end of the clamp plate 508.

  The drive lever 511 that slides along the inner surface of the left side surface of the housing is connected to the tip of the third drive lever 510 by a pin 510c and a long hole 511a, and a locking operation cam groove 511b is formed on the upper surface of the slide member 511. A cam groove 511c for disc chucking operation is formed. Then, the pin 505d provided on the lock member 505 is engaged with the cam groove 511b for the lock operation, the drive plate 512 of the clamp plate 508 and the connecting plate 513 are swingably connected, and the pin provided on the connecting plate 513 514 is engaged with a cam groove 511c for disc chucking operation.

Next, the operation will be described.
Operation from Disc Insertion to Playback First, a switch (not shown) is closed to start the motor 201, and the first and second rotating bodies 203 and 204 are rotated via the gear group 202. Due to the rotation of the second rotating plate 204, the second drive lever 310 engaged with the cam groove 204b rotates in the direction of arrow A, and by this rotation, the intermediate lever 311 rotates in the direction of arrow B, and the cam plate 301 is moved in the direction of arrow C. By this movement, the shutters 302R and 302L in which the pins 302a and 302b engage with the cam grooves 301a and 301b of the cam plate 301 rotate in the directions of arrows D and E, respectively, to open the disc insertion port 303.

  At this time, as shown in FIG. 20, the reproducing unit 500 is retracted out of the area where the disk moves, the disk transport plate 315 is at the back side of the housing 101, and the stocker 405 is at a desired level at the disk transport height. Only the stocker portion that engages with the spiral groove 401a of the rotating shaft 401 close to the disk insertion port 303 at the facing position is lowered to the reproduction retracted height.

  In this state, when the sensor 309 detects a disk inserted from the disk insertion slot 303, the motor 319 is activated in response to this detection signal, and the roller 317 is driven to rotate via the gear group 318. As a result, the disk is guided to the inside of the housing 101 while the upper and lower surfaces are guided by the disk transport plate 315 and the stocker 405 and the left and right sides are guided by the rotating shaft 401 and the side wall 508c of the clamp plate 508. The mode detection of the second rotating body 204 is performed by engaging the sensor driving lever 213 engaged with the cam groove 204c of the second rotating body 204 by the pin 213a and the forked portion 213b at the tip of the sensor driving lever 213. This is performed by the position sensor 214 having a pin 214a.

  When the inserted disc 450 is conveyed to a predetermined position, as shown in FIG. 22, the disc detection plate 207b is pushed by the disc and rotates in the arrow F direction, and the switch lever 209 is moved to the arrow G via the lever 207. The switch 214 is closed by rotating in the direction.

  By the subsequent rotation of the second rotating body 204 by driving the motor 201, the second drive lever 310 is rotated in the direction of arrow A ′, the intermediate lever 311 is rotated in the direction of arrow B ′, and the cam plate 301 is moved in the direction of arrow C. Then, the shutter 302R, 302L is protruded into the disc insertion path, and the disc insertion slot 303 is closed.

  On the other hand, when the motor 418 is started based on the closing signal of the switch 214, the rotary shafts 401, 402, and 403 rotate via the gear group 419, the large diameter gear 404, and the gears 401d, 402d, and 403d. As shown in FIG. 24, the height of the stocker 405 on the disc insertion side is set to the disc via the protrusions 406c, 407c, and 408c of the support member engaged with the spiral grooves 401a, 402a, and 403a of the respective rotary shafts 401, 402, and 403. Return to transport height.

  At the same time, the gear 412 rotates, and the swing lever 414 having the pin 414a that engages with the 8-shaped cam groove 413a of the gear 413 that meshes with the gear 412 rotates in the arrow H direction. As shown in FIG. 23, the disc guide member 415 is raised to the disc transport height in the direction of arrow M by the rotation of the arrow J in the direction of the arrow, the arrow K in the direction of the slide plate 416, and the rotation of the rotation plate 417 in the direction of the arrow L.

  Then, by the subsequent rotation of the second rotating body 204 by the drive of the motor 201, the disk detection plate 207b is moved to the arrow F by the rotation of the first drive lever 205 in the arrow N direction and the movement of the slide plate 206 in the arrow P direction. Rotate and retract in the direction. Further, the stocker leaf spring 215a that presses the disc against the stocker by the movement of the slide plate 206 in the arrow P direction, the lever 208 in the arrow Q direction, the L-shaped lever 210 in the arrow R direction, and the slide plate 211 in the arrow S direction. 215b is released and the slide plate 211 is contacted and pressed by the slide plate 211.

  As a result, as shown in FIGS. 25 and 26, the slide plate 212 moves by a certain amount in the direction of arrow T, and the lock member 322 is rotated in the direction of arrow U by the bifurcated engagement portion 212c, so that the pin 322b and the L-shape The engagement with the groove 314d is released. At the same time, the second drive lever 310 is rotated in the direction of arrow A, and the disk guide member 421 is rotated in the direction of arrow f via the gear train 422, so that the clamping piece 421a of the disk guide member 421 is shown in FIG. To support the disk 450. When the motor 319 is activated, the slider plate 212, which is pushed and moved by the slide plate 211 and the rack 212 b meshes with one gear in the gear train 320, receives the driving force of the motor 319 and then receives the disk transport plate 315. Is moved to the disc insertion slot side (arrow V direction).

  On the other hand, due to the subsequent rotation of the motor 418, the rotation of the rotary shafts 401, 402, and 403 via the gear group 419, the large diameter gear 404, and the gears 401d, 402d, and 403d causes the stocker 405 to move to the reproducing unit as shown in FIG. Rise to the intrusion height. At the same time, the gear 412 rotates, and the swing lever 414 having the pin 414a that engages with the 8-shaped cam groove 413a of the gear 413 that meshes with the gear 412 rotates in the arrow H direction. As shown in FIG. 28, the disc guide member 421 supports the disc to reach the reproducing unit intrusion height by rotating the arrow J in the arrow J, the arrow K in the slide plate 416, and the arrow L in the rotation plate 417. To rise.

  By the spiral cam groove 203a of the first rotating body 203 driven via the motor 201 and the gear group 202, the rotation lever 501 is rotated in the arrow W direction, and the cut groove 503d of the reproducing unit support plate 503 is formed. By engaging with the positioning member 103, the axis of the tan table 507 coincides with the axis of the disc held by the stocker 405 as shown in FIG.

  By the rotation of the reproduction unit support plate 503, the support plate 504 disposed on the support plate comes into contact with the disk guide member 421, and the rotation bearing plate 423 is rotated in the arrow Z direction, so that the reproduction unit entry position is reached. Thus, the disk guide member 421 is retracted. At this time, the clamp plate 508 is in a non-chucking state.

  As the motor 418 further rotates and the rotation shafts 401, 402, and 403 rotate through the gear group 419, the large-diameter gear 404, and the gears 401d, 402d, and 403d, as shown in FIG. Decreases to the chucking height (disc transport height). At the same time, the rotation of the gear 412 causes the swing lever 414 having the pin 414a engaged with the 8-shaped cam groove 413a of the gear 413 engaged with the gear 412 to rotate in the direction of the arrow H ′, and the slide plate by this rotation As shown in FIGS. 32 and 28, the disc guide member 421 is moved in the direction of the arrow M ′ by the rotation of the arrow 45 ′ in the arrow 45 ′, the arrow K ′ in the slide plate 416, and the arrow L ′ in the rotation plate 417. The disk 450 is lowered to the chucking height, and the disk 450 is placed on the turntable 507.

  By the motor 201, the gear group 202, and the cam groove 204d of the second rotating body 204, the lever 510 is rotated in the direction of arrow a, the slide member 511 is moved in the direction of arrow b, and the connecting plate 513 is rotated in the direction of arrow c. As the clamp plate 508 moves in the direction of the arrow d of the drive plate 512, the rotation prevention member (not shown) of the clamp plate provided on the drive plate 512 releases the rotation prevention. As shown in FIG. 33, the clamper 508a presses the disc against the tongue table 507 for chucking as shown in FIG.

  Further, by the subsequent rotation of the second rotating body 204 by driving the motor 201, the first drive lever 205 is moved in the arrow N ′ direction, the slide plate 206 is moved in the arrow P ′ direction, the lever 208 is moved in the arrow Q ′ direction, L As shown in FIG. 34, the stocker leaf springs 215a and 215b are brought into contact with and pushed up by the movement of the letter-shaped lever 210 in the direction of the arrow R ′ and the direction of the arrow S ′ of the slide plate 211 to retract from the disk. At the same time, the second drive lever 310 is rotated in the direction of arrow A ′, and the disk guide member 421 is rotated in the direction of arrow f ′ via the gear train 422. As shown in FIG. Remove support.

  When the motor 418 further rotates and the rotation shafts 401, 402, and 403 rotate through the gear group 419, the large diameter gear 404, and the gears 401d, 402d, and 403d, the stocker 405 reaches the reproduction height as shown in FIG. Go down. At the same time, the gear 412 rotates, and the swing lever 414 having the pin 414a that engages with the 8-shaped cam groove 413a of the gear 413 that meshes with the gear 412 rotates in the direction of the arrow H ′. As shown in FIG. 36, the disc guide member 421 is moved in the direction of the arrow M ′ by the rotation in the arrow J ′ direction 415, the arrow K ′ direction in the slide plate 416, and the arrow L ′ direction in the rotation plate 417. Descent to the end and evacuate from the disc to be played.

  Further, by the motor 201, the gear group 202, and the cam groove 204d of the second rotating body 204, the lever 510 is rotated in the direction of arrow a, the slide member 511 is moved in the direction of arrow b, and the lock members 505 and 506 are moved to the arrow. Rotating in the g and h directions, the support plate 504 is unlocked as shown in FIG.

Operation from reproduction to disk ejection The lever 510 is rotated in the direction of arrow a ′ by the motor 201, the gear group 202, and the cam groove 204d of the second rotating body 204, and the slide member 511 is moved in the direction of arrow b ′. The lock members 505 and 506 rotate in the directions of arrows g ′ and h ′ to lock the support plate 504 as shown in FIG.

  By driving the motor 418, the rotation shafts 401, 402, and 403 are rotated through the gear group 419, the large-diameter gear 404, and the gears 401d, 402d, and 403d, and as shown in FIG. Rises to the height of chaking. At the same time, the gear 412 rotates, and the swing lever 414 having the pin 414a that engages with the 8-shaped cam groove 413a of the gear 413 that meshes with the gear 412 rotates in the arrow H direction. As shown in FIG. 30, the disc guide member 421 is raised to the disc chucking height in the direction of arrow M by the rotation of the arrow J in the direction of the arrow, the arrow K in the direction of the slide plate 416, and the rotation of the rotation plate 417 in the direction of the arrow L.

  Rotation of the second rotating body 204 by driving of the motor 201, rotation of the lever 205 in the direction of arrow N, movement of the slide plate 206 in the direction of arrow P, rotation of the lever 208 in the direction of arrow Q, L-shape By rotating the lever 210 in the arrow R direction and moving the slide plate 211 in the arrow S direction, the stocker leaf springs 215a and 215b are released from contact with each other and brought into contact with the disk. At the same time, the second drive lever 310 is rotated in the direction of arrow A ′, and the disk guide member 421 is rotated in the direction of arrow f ′ via the gear group 416. As shown in FIG. Give support.

  Further, by the motor 201, the gear group 202, and the cam groove 204d of the second rotating body 204, the lever 510 is rotated in the arrow a direction, the slide member 511 is moved in the arrow b direction, and the connecting plate 513 is moved in the arrow c ′ direction. By rotation and movement of the drive plate 512 in the direction of arrow d ′, the clamp plate 508 rises in the direction of arrow e ′ against the spring force of the coil spring 509, and the clamper 508b is detached from the disk as shown in FIG. .

  As the motor 418 further rotates and the rotation shafts 401, 402, and 403 rotate via the gear group 419, the large diameter gear 404, and the gears 401d, 402d, and 403d, as shown in FIG. Increases to the intrusion height of the playback unit. At the same time, the rotation of the gear 412 causes the swing lever 414 having the pin 414a engaged with the 8-shaped cam groove 413a of the gear 413 engaged with the gear 412 to rotate in the direction of arrow H, and the slide plate 415 due to this rotation. As shown in FIG. 32, the disk guide member 421 rises in the direction of arrow M to the playback unit intrusion height, as shown in FIG. 32, by the arrow J direction, the slide plate 416 in the arrow K direction, and the rotation plate 417 in the arrow L direction. Remove the disc from the fitting part of the turntable 507.

  The rotating lever 501 is rotated in the direction of arrow W ′ by the spiral cam groove 203a of the first rotating body 203 driven via the motor 201 and the gear group 202, and the support plate 504 that supports the entire reproducing unit. As shown in FIGS. 30 and 31, it is rotated to a position where it is retracted out of the disk storage area. By the retraction rotation of the support plate 504, the rotation bearing plate 423 is rotated in the direction of the arrow Z ′, and the disk guide member 421 is returned to the initial position.

  The motor 418 further rotates, and the stocker 405 is lowered to the conveyance height as shown in FIG. 24 by the rotation of the rotation shafts 401, 402, and 403 through the gear group 419, the large diameter gear 404, and the gears 401d, 402d, and 403d. To do. At the same time, the rotation of the gear 412 causes the swing lever 414 having the pin 414a engaged with the 8-shaped cam groove 413a of the gear 413 engaged with the gear 412 to rotate in the direction of the arrow H ′, and the slide plate by this rotation As shown in FIG. 28, the rotation of the slide plate 416 in the arrow J ′ direction, the arrow K ′ direction of the slide plate 416, and the arrow L ′ direction of the rotation plate 417 causes the arrow M in a state where the disc guide member 421 supports the disc. 'Down to the transport height in the direction.

  As shown in FIG. 26, the rotation of the motor 319 moves the slider plate 212 in the direction of the arrow T ′ via the gear group 320, and the disk transport plate 315 is moved to the front of the housing 101 until the lock member 322 is locked. Move to the back side. The movement of the slide plate 212 causes the rotation plate 316 to rotate in the direction of the arrow l ′ when the pin 321 moves along the cam groove 101g of the right side surface 101b of the housing, and the gear provided on the disc conveyance roller shaft. 318 engages with the gear train 320.

  The rotation of the second rotating body 204 driven by the motor 201 causes the lever 205 to move in the arrow N ′ direction, the slide plate 206 to move in the arrow P ′ direction, the lever 208 in the arrow Q ′ direction, and the L-shaped lever 210 arrow. By the movement of the slide plate 211 in the R ′ direction and the arrow S ′ direction, the contact and push-up of the stocker leaf springs 215a and 215b and the contact with the slide plate 212 are released.

  As a result, the slide plate 212 moves to the initial position in the direction of the arrow T ′, and the lock member 322 is rotated in the direction of the arrow U ′ by the bifurcated engagement portion 212 c to enter the locked state. At the same time, the second drive lever 310 is rotated in the direction of the arrow A ′, and the disk guide member 421 is rotated in the direction of the arrow f ′ via the gear train 422, so that the disk is supported by the holding piece 421a as shown in FIG. To release. Further, the rotation restriction of the disc detection plate 207b is removed by the movement of the slide plate 206 in the arrow P 'direction.

  As shown in FIG. 20, the front side of the stocker 405 is engaged by the rotation of the rotating shaft 401, 402, 403 through the gear group 419, the large diameter gear 404, the gears 401d, 402d, 403d. The part height drops to the retreat evacuation height. At the same time, the rotation of the gear 412 causes the swing lever 414 having the pin 414a engaged with the 8-shaped cam groove 413a of the gear 413 engaged with the gear 412 to rotate in the direction of the arrow H ′, and the slide plate by this rotation As shown in FIG. 24, the disc guide member 421 is lowered to the retracted height by the rotation in the arrow J ′ direction of 415, the arrow K ′ direction of the slide plate 416, and the arrow L ′ direction of the rotation plate 417.

  By rotating the second rotating body 204 by driving the motor 201, the second drive lever 310 is rotated in the direction of arrow A, the intermediate lever 311 is rotated in the direction of arrow B, and the cam plate 301 is moved in the direction of arrow C. As shown in FIG. 19, the shutters 302 </ b> R and 302 </ b> L are released out of the disk conveyance path, and the disk insertion slot 303 is opened.

  The motor 319 rotates and the disk transport roller 317 rotates through the gear group 320 to eject the disk. When the disc is ejected from the insertion port 303 to a predetermined position, a sensor (not shown) detects this ejection and stops the motor 319, resulting in the state shown in FIG.

Disc Changer Operation By the above-described operation, the reproducing unit 500 is rotated from the reproducing position to the retracted position, and the disc guide member 421 is returned to the initial position. Thereafter, by the rotation of the second rotating body 204, the second drive lever 310 is rotated in the direction of arrow A ′, the disc guide member 421 is rotated in the direction of arrow f ′ via the gear train 422, and the holding piece 421a. Release disk support by. At the same time, the rack member 424 that meshes with one gear of the gear train 422 moves in the direction of the arrow j, and the gear member 425a of the pivot member 425 meshes with the rack member 424. As shown in FIG. 39, the disk rises in the direction of arrow K, and prevents the disk from protruding from the stocker 405 that is in contact with the circumferential surface of the disk.

  The motor 418 further rotates, and the stocker 405 moves to a desired height by the rotation of the rotation shafts 401, 402, and 403 via the gear group 419, the large diameter gear 404, and the gears 401d, 402d, and 403d.

  The rotation of the second rotating body 204 driven by the motor 201 rotates the second drive lever 310 in the direction of arrow A, and the rack member 424 that meshes with one gear of the gear train 422 moves in the direction of arrow j ′. A rotating member 425 having a gear portion 425a meshing with the rack member 424 is rotated and retracted in the direction of the arrow k ′ by the movement of the rack member. At the same time, through the rotation of the gear train 422, as shown in FIG. 40, the disk guide member 421 rotates in the direction of the arrow f 'to support the disk.

  When reproducing, the reproducing unit 500 is rotated to a position where the axis of the turntable 507 coincides with the axis of the disk by the above-described operation, the selected disk is placed on the turntable 507, and the disk 450 is loaded. Chucking is performed, the stocker leaf springs 215a and 215b are retracted from the disk, the reproduction unit 502 is unlocked, and the reproduction operation is started.

It is a perspective view of a reproducing part unit. It is a perspective view of the reproduction | regeneration part which removed the clamp means. It is a perspective view which shows the reproduction | regeneration part support plate in a retracted state, and the mechanism part relevant to this. It is a top view of the mechanism part of FIG. It is a perspective view which shows the state which the reproduction | regeneration part support plate rotated to the reproduction | regeneration position, and the mechanism part relevant to this. It is a top view of the mechanism part of FIG. It is a perspective view which shows the state which the reproducing part support plate rotated to the reproduction | regeneration position, and clamped the disk on the turntable, and the mechanism part relevant to this. It is a top view of the mechanism part of FIG. FIG. 5 is a perspective view showing a disc playback state in which a playback unit support plate is rotated to a playback position and a mechanism unit related thereto. It is a top view of the mechanism part of FIG. It is a schematic diagram of a control circuit. It is a flowchart explaining operation | movement. It is a schematic diagram of an inclination adjustment means. It is an external appearance perspective view of an apparatus main body. It is the perspective view which removed the top plate from the housing | casing and showed the inside. FIG. 16 is a plan view of FIG. 15. It is a perspective view which shows the state which removed the front plate of the housing | casing. It is the top view which removed the top plate and showed the inside of a case. It is a perspective view from the apparatus right rear. It is a right side view of the device shown with the side plate removed. It is a perspective view from the apparatus left rear. It is a perspective view from the apparatus right front. It is a perspective view from the apparatus left rear. It is a right side view of the device shown with the side plate removed when the disc is placed. It is a perspective view from the apparatus left rear. It is a perspective view from the apparatus right rear. It is the top view which removed the top plate and showed the inside of a housing | casing. It is a perspective view from the apparatus left rear. It is a right side view of the device when the playback unit is inserted. It is the top view which turned the reproduction | regeneration unit to the reproduction | regeneration position and showed the inside of a housing | casing. It is a perspective view from the apparatus right rear. It is a perspective view from the apparatus right front. It is a perspective view from the apparatus left rear. It is a perspective view from the apparatus right rear. It is the top view which showed the inside of the housing | casing in the reproduction | regeneration state. It is a perspective view from the apparatus right front. It is a right side view of the device in a reproduction state. It is the top view which removed the top plate and showed the inside of a housing | casing. It is a perspective view from the apparatus left rear. It is a perspective view from the apparatus left rear. It is a top view which shows the relationship between the cam groove of a 2nd rotary body, and the lever which this cam groove engages. It is an expanded view of the spiral groove which moves a stocker up and down.

Explanation of symbols

  502 playback unit, 507 turntable, 513 reading means (pickup), 551 tilt angle adjusting means, 560 jig insertion window, 601 control unit (microcomputer).

Claims (4)

  A reading unit for reading stored information on the disc and a turntable on which the disc is placed; a reproducing unit which is in a floating state during reproduction of the disc and in a locked state during non-reproduction; and A moving means for moving the disk in the radial direction, an inclination adjusting means for changing the inclination of the reading means with respect to the disk surface, and when receiving an assembly mode signal, after clamping the disk on the turntable, A control unit that shifts to the playback state while holding the playback unit in a locked state, and a housing that operates the tilt angle adjusting unit from the outside of the housing and changes the tilt angle of the reading unit with respect to the disk surface in the playback state. A disk device comprising a jig insertion window provided on the body.   2. The disk apparatus according to claim 1, wherein after the inclination angle of the reading means with respect to the disk surface is adjusted, a locking agent is applied to the inclination angle adjusting means so as to fix the reading means at the adjustment position.   2. The disk device according to claim 1, wherein a locking agent application window for the tilt angle adjusting means is provided at a position of the casing facing the tilt angle adjusting means of the reproducing unit retracted to the side surface of the casing.   The reproduction unit having the reading means for reading the storage information of the disk and the turntable on which the disk is placed is moved from the retracted position to the reproduction position in the locked state to hold the disk on the turntable and then unlocked. When the assembly mode signal is given when the disk is rotated and the reading means is moved in the radial direction of the disk for reproduction, the reproduction unit is in a locked state for reproduction operation. And adjusting the inclination angle of the reading means with respect to the disk surface so as to obtain the best reproduction state while performing this reproduction operation.

Images