Disk apparatus and disk magazine

Abstract: A magazine casing is composed of a magazine upper section and a magazine lower section. A chassis unit includes a magazine shift unit for lifting the magazine upper section, a vertical-tracking unit for selecting a desired disk, a swing unit transferred into a space between the divided magazine upper section and the magazine lower section, and a drive unit provided on the swing unit for playing back the selected disk. A vertical guide hole is formed in the magazine upper section. The chassis unit is provided with a vertical guide shaft that is inserted into the guide hole when lifting the magazine upper section.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk apparatus according to the preamble of claim 1 attached. This disk apparatus selects a desired disk from a disk magazine accommodating therein a plurality of disks for playback and/or recording. More particularly, the present invention relates to a disk apparatus which performs disk selecting and playback and/or recording with a disk magazine divided into upper and lower sections, thereby allowing components thereof to be arranged adjacent to each other so as to allow a reduction in size of the overall apparatus, and to a disk magazine used therewith. 2. Description of the Related Art In recent years, disk apparatuses, such as CD players and MD players, using disks as a medium, have become very popular. In particular, an auto-changer-type disk apparatus has been developed wherein a desired disk is selected from a disk magazine accommodating therein a plurality of disks for playback. The auto-changer-type disk apparatus is particularly convenient as a disk apparatus for use in a vehicle because there is no need to load and unload disks one by one each time the disks to be played are exchanged. In the disk apparatus of the type described above using a disk magazine, a disk playback section is arranged adjacent to a magazine accommodation section. In a large number of such disk apparatuses, a desired disk in a magazine is pulled out and transported by a transporting mechanism to the disk playback section to be set thereat, and then a disk playback is performed. With this arrangement, however, a certain distance must be provided between the disk playback section and the magazine accommodation section in order to conserve space for setting the disk to the disk playback section for playback. Accordingly, the overall disk apparatus must be of increased size, and the disk apparatus is disadvantageous as an in-vehicle apparatus in which a mounting space is restricted. For example, in a recent in-vehicle audio apparatus, the size of the opening for accommodating the equipment in vehicles has been standardized to 180 mm by 50 mm, called a "DIN size", or 180 mm by 100 mm, called a "double-DIN size". In addition, the depth of the opening is only about 160 mm at present, so that audio device-mounting space in a vehicle is restricted. Since compact disks are 120 mm in diameter, 240 mm (= 120 mm x 2) in the longest width direction is required for the above disk apparatus. Accordingly, the device cannot be accommodated in the opening located beside the driver's seat. In view of the foregoing circumstances, a conventional CD auto-changer is accommodated in the trunk of a vehicle, or near the foot of the driver's seat. In the former case, however, the trunk space is reduced, the trunk must be opened each time disks are exchanging, and a long line connecting the trunk and an operating section is required. In the latter case, there is a risk that foot space will be reduced, resulting in breakage of the auto-changer when accidentally impacted by the driver's foot. In order to cope with the above problems, Japanese Unexamined Patent Publication No. 6-203519 discloses a disk apparatus in which a disk magazine is divided into upper and lower sections, and disk playback is performed with a disk playback section transferred therebetween. In such a disk apparatus, a disk accommodation position overlaps a disk playback position, so that a horizontal dimension can be reduced. The disk magazine is usually divided by a magazine holder provided on a chassis unit to be movable in the vertical direction. That is, the arrangement is such that a pin fixed to the magazine holder is inserted into a stepwise cam formed on a cam plate, and the cam plate is slidably moved back and forth, thereby moving the magazine holder upward together with the pin moving within the stepwise cam. Then, an upper disk magazine is held by the magazine holder, and the magazine holder is moved upward, whereby the upper disk magazine is lifted together with an internal tray to be divided from a lower disk magazine. The disk apparatus using the above divided disk magazine has the following drawbacks which must be overcome. In the in-vehicle disk apparatus, a vibration-proof mechanism using a damper, etc., is provided on the disk playback section in order to reduce effects of external vibrations. The disk playback section is, however, definitely provided with an optical pickup that moves in a radial direction of the disk. For this reason, the damper must be provided outside the movement range of the optical pickup so as not to disturb the movement of the optical pickup. Accordingly, an additional area for the damper is required for the disk playback section, so that overall size of the disk apparatus is increased. The disk playback section is usually provided on a swing unit that rotates about a rotation shaft. Thus, when the swing unit is transferred into a space between the vertically divided disk magazines, the disk playback section is supported only by a rotation support of the swing unit, and is easily affected by vibrations. Accordingly, the disk apparatus is disadvantageous as the in-vehicle disk apparatus. US patent 5,042,024 discloses a disk reproduction apparatus of the type capable of being displaced from a horizontal attitude to a vertical attitude or vice versa. This known reproduction apparatus includes an outer casing, a support frame disposed inside the outer casing in a floating manner and loaded with a magazine in which a compact disk is mounted, a vibration proof mechanism disposed between the corresponding side surfaces of the outer casting and the support frame and formed by dampers, and a pickup device disposed above the compact disk, and being movable and adapted to read the information recorded on the compact disk. The vibration proof mechanism included the support, such as a rotating plate, pivotally secured to the side surface of the outer casing and a spring having one end engaged with the pivotal rotating plate and the other end secured to the side surface, opposing to the side surface of the outer casing of the support frame. Several vibration proof mechanisms may be disposed on both side surfaces of the outer casing and the support frame. The operation of the pickup device is controlled by a servo-controlled mechanism so as to be movable in a radial direction of the compact disk. Moreover, US patent 5,481,512 discloses a magazine for accommodating a plurality of disks and an automatic disk player employing the magazine from which a desired disk to be played by the player is automatically selected and separated from the magazine. The magazine comprises a plurality of stacked wavers for holding the plurality of disks and a coupling device for separately coupling the wavers forming the magazine. The wavers include a plurality of trays each of which comprises a disk clamping device for releasable holding each of the disks on a bottom surface of each tray. When the magazine is loaded into the automatic disk player, the coupling device is activated separate the wavers for providing at least a predetermined space between the wavers and for allowing a disk playing device of the player to enter into the predetermined space, wherein the disk clamping device releases one of the disks held by the disk clamping device of the tray selected by the player so that a released disk is transferred to a turntable of the disk playing device to be played. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention provide a compact disk apparatus which can save space for dampers without damaging the vibration-reducing capability. In accordance with a first aspect of the present invention, there is provided a disk apparatus including a disk magazine having a plurality of trays, each tray having mounted therein a disk, the disk magazine divided into upper and lower sections, a chassis unit for mounting therein the disk magazine, a magazine dividing section for dividing and uniting the trags of said disk magazine mounted in the chassis unit, a disk selecting section for selecting a desired disk, a swing unit adapted to be transferred into a space between the trags of the divided upper and lower sections of the disk magazine, and a disk playback section provided with an optical pickup on the swing unit for playing back the disk selected by the disk selecting section, wherein the disk playback section is supported on the swing unit by a plurality of dampers, and wherein at least one of the dampers is a movable damper provided so as to move between an accommodation position within a movable range of the optical pickup and a retracted position beyond the movable range of the optical pickup. In accordance with the described arrangements, the movable damper is located at the accommodation position at the time of standby of the swing unit, and the movable damper is removed from the movable range of the disk playback section to perform disk playback operation, whereby space required for the dampers can be saved without damaging the vibration-reducing capability of the dampers. The disk apparatus in accordance with the present invention may further include a floating lock mechanism for providing a floating locked state in which deviation of the disk playback section is restricted before the swing unit is transferred, and for providing a floating locked state in which the disk playback section is supported by only the dampers after the swing unit has been transferred, and a gear mechanism for synchronizing the floating lock mechanism and the movable damper so that the movable damper is located on the accommodation position when the disk playback section is in the former floating locked state, and the movable damper is located at the retracted position when the disk playback section is in the latter floating locked state. In accordance with the described arrangements, the movable damper can be moved in synchronism with the floating lock mechanism, so that the movable damper can be moved to the retracted position only when damper support is required. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a disk apparatus in accordance with an embodiment of the present invention as viewed from the front; FIG. 2 is an external perspective view of a disk apparatus shown in FIG. 1 as viewed from the rear; FIG. 3 is an external perspective view showing a disk magazine in accordance with the embodiment of the present invention; FIG. 4 is a transparent plan view showing said disk magazine in accordance with the embodiment of the present invention; FIG. 5 is a front view showing a divided state of the disk magazine shown in FIG. 4; FIG. 6 is a plan view showing a tray to be accommodated in the disk magazine shown in FIG. 4; FIG. 7 is a transparent plan view of a magazine upper section constituting the disk magazine shown in FIG. 4; FIG. 8 is a front view showing an upper slit section of the magazine upper section shown in FIG. 7; FIG. 9 is a side view showing a disk ejection lever of the magazine upper section shown in FIG. 7; FIG. 10 is a perspective view of magazine lower section constituting the disk magazine shown in FIG. 4, as viewed from the top surface thereof; FIG. 11 is a front view showing a lower slit section of the magazine lower section shown in FIG. 10; FIG. 12 is a partially transparent plan view showing the embodiment of the present invention; FIG. 13 is a transparent left-hand side view showing a magazine shift unit in the embodiment shown in FIG. 12; FIG. 14 is a transparent right-hand side view showing the magazine shift unit in the embodiment shown in FIG. 12; FIG. 15 is a front view showing the magazine shift unit in the embodiment shown in FIG. 12; FIG. 16 is a rear elevation showing a vertical-tracking unit in the embodiment shown in FIG. 12; FIG. 17 is a partially transparent plan view showing a swing unit in the embodiment shown in FIG. 12; FIG. 18A is a transparent plan view showing a magazine locked state, FIG. 18B is a transparent plan view showing a magazine released state and a disk holding state, and FIG. 18C is a transparent plan view showing a disk releasing state; FIG. 19 is a transparent right-hand side view showing a magazine divided state in FIG. 14; FIG. 20 is a partially transparent plan view showing the transferred swing unit in the embodiment shown in FIG. 12; and FIG. 21 is a partially transparent plan view showing a floating lock releasing operation and a damper retracting operation in the embodiment shown in FIG. 12. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to FIGS. 1 to 21. (1) Configuration 1. Overall configuration As shown in FIGS. 1 and 2, a disk apparatus of this embodiment is configured by the following units provided on a chassis unit 1 in which a casing 100 of a disk magazine is mounted. (a) A magazine shift unit 200 for dividing the magazine casing 100 into upper and lower sections to conserve a playback space therebetween; (b) a vertical-tracking unit 300 for selecting a target disk D; (c) a swing unit 400 which is provided on the vertical-tracking unit 300, and transferred into the playback space formed between the divided magazine casing 100; (d) a drive unit 500 which is provided on the swing unit 400, and includes an optical pickup; and (e) a magazine eject unit 600 (see FIG. 12) for ejecting the magazine casing 100. Configurations of these units will be described below in detail. 2. Disk magazine First, a configuration of a disk magazine will be described with reference to FIG. 3. A bold arrow in FIG. 3 indicate an insertion direction for the magazine casing 100 into a chassis unit 1. That is, as shown in FIG. 3, the inside of the magazine casing 100 is partitioned by five trays 110 for individually holding and accommodating a disk D. The magazine casing 100 is provided so as to be divided into a magazine upper section 120 and a magazine lower section 130. Configurations of these components are as follows. (Trays 110) As shown in FIG. 6, two tray-supporting projections 117 formed at two opposite sections of the periphery of each thin-wall disc-shaped tray 110 to project outwards. Two disk-holding projections 117a are formed inside of the two tray-supporting projections 117, respectively. Sections between the tray-supporting projections and the disk-holding projections 117a can be elastically deformed so that the disk-holding projections 117a project inward to hold the disk D when the tray-supporting projections are pressed, and the disk-holding projections 117a retract outward to release the disk D when the tray-supporting projections 117 is not pressed. Another tray-supporting projection 118 is formed in the middle of the two tray-supporting projections 117. In addition, another disk-holding projection 119 is formed between one of the tray-supporting projections 117 (the lower tray-supporting projection in FIG. 6) and the intermediate tray-supporting projection 118. A pressed section 119a is formed outside of the disk-holding projection 119. A section between the disk-holding projection 119 and the pressed section 119a can be elastically deformed so that the disk-holding projection 119 projects inward to hold the disk D when the pressed section 119a is pressed inward, and the disk-holding projection 119 retracts outward to release the disk D when the pressed section 119a is not pressed. A gear groove 116a is formed on the opposite side of the disk-holding projection 119. A rotational locking groove 110a is formed between the gear groove 116a and the tray-supporting projection 117 near the gear groove 116a. The tray 110 has a control section 113 against which the periphery of the disk D abuts formed at the circular section between the intermediate tray-supporting projection 118 and the two tray-supporting projections 117. Furthermore, a fan-like cutout 110b is formed between the tray-supporting projection 117 and the disk-holding projection 119. (Magazine upper section 120) The magazine upper section 120 consists of an upper plate 121 and three side plates 122, as shown in FIG. 7. Side walls 122a and upper slit sections 123 are provided inside each of the three side plates 122. As shown in FIG. 8, five slits 123a are formed in the upper slit section 123, and the uppermost slit 123a is formed to be the longest. A protuberance 123d protruding toward the center of the disk D is formed on the inner surfaces of each of the slits 123a between the opposing two upper slit sections 123. Furthermore, a presser surface 127, which abuts against the pressed section 119a of the tray 110, is formed inside the left side plate 122 of the lower side plates 122 shown in FIGS. 4 and 7. A tray hold arm 124 provided on the magazine upper section 120 is biased by a tension coil spring 124a in the direction in which its terminal end engages with the rotational locking groove 110a of the tray, as shown in FIGS. 4 and 6. A disk ejection lever 128 is rotatably provided at a position corresponding to the fan-like cutout 110b of the tray 110 in the magazine upper section 120, and is biased by a tension coil spring 128a in the direction in which its terminal end moves away from the disk D. As shown in FIG. 9, the terminal end of the disk ejection lever 128 is stepped so as to correspond with the height of each tray 110, as shown in FIG. 9. A guide hole 126a into which a guide shaft 3 is inserted is formed at a position corresponding to the shaft of the disk ejection lever 128 of the upper plate 121. (Magazine lower section 130) As shown in FIG. 10, a lower surface 131 of the magazine lower section 131 is provided with three lower slit sections 132, as shown in FIG. 10. Of five slits 132a of each lower slit section 132, the uppermost slit 132a is formed to be the shortest, as shown in FIG. 11. 2. Magazine shift unit 200 The magazine shift unit 200 consists of a magazine holder 210, a left magazine shift plate 250, a magazine shift link 260, and a right magazine shift plate 270, as shown in FIGS. 12 to 15. Configurations of these components are as follows. (Magazine holder 210) As shown in FIG. 12, an insertion hole 210a through which one guide shaft 3 is inserted without contacting each other is formed in the top surface of the magazine holder 210. (Left magazine shift plate 250) The left magazine shift plate 250 is provided on the left side of the magazine insertion opening 2 so as to slide back and forth, as shown in FIG. 13. An inclined cam 251 is formed in the vertical surface of the left magazine shift plate 251. The inclined cam 251 has a inclined linear shape such that it gradually ascends rearward. The holder guide pin 211 of the magazine holder 210 is slidably inserted into the inclined cam 251. The lower end of the left magazine shift plate 250 is bent around the corner of the bottom surface of the chassis unit 1 to form a horizontal surface, and an end of the magazine shift link 260 is rotatably coupled to the horizontal surface. (Magazine shift link 260) The magazine shift link 260 is a rectangular plate having the length of about the width of the magazine insertion opening 2. as shown in FIG. 12, and is mounted on the outer bottom surface of the chassis unit 1 so as to rotate about the center thereof. An end of the magazine shift link 260 is rotatably coupled to the left magazine shift plate 250 as described above, and the other end is rotatably coupled to the right magazine shift plate 270 as described below. (Right magazine shift plate 270) The right magazine shift plate 270 is provided on the right side surface of the chassis unit 1 so as to slide back and forth, as shown in FIGS. 12 and 14. The lower end of the right magazine shift plate 270 is bent along the corner of the bottom surface of the chassis unit 1 to form a horizontal surface, and the other end of the magazine shift link 260 is rotatably coupled to the horizontal surface, as described above. In addition, two inclined cams 271 are formed in parallel with each other in the vertical surface of the right magazine shift plate 270. Each of the inclined cams 271 has a inclined linear shape such that it gradually descends rearwards. The holder guide pins 211 of the magazine holder 210 are slidably inserted into the inclined cams 271. Furthermore, a magazine shifting rack 272 is horizontally formed on the rear lower end of the right magazine shift plate 270. The magazine shifting rack 272 engages with a pinion driven by a magazine shift motor (not shown). 3. Vertical-tracking unit 300 (Shift cam gear 312) A shift cam gear 312 has a similar function of the loading gear 310 in the first embodiment, and is provided on the rear right corner of the bottom surface of the chassis unit 1, as shown in FIG. 12. The shift cam gear 312 is of a three-stage construction in which an upper gear 312a having a large diameter and spur gear formed therearound, an intermediate gear 312b having the diameter smaller than that of the upper gear 312a, and a lower gear 312c having the diameter smaller than that of the intermediate gear 312b are formed in one piece. The upper gear 312a can transmit a driving force of a loading motor (not shown). The intermediate gear 312b is provided at the height corresponding to the vertical-shifting rack 321 of a rear shift plate 320. (Drive unit 370) A drive unit 370 consists of a driving motor 361, a transmission gear 371, a large cam gear 372, an intermediate gear 373, and a tray gear 374, as shown in FIGS. 12 and 17. The transmission gear 371 transmits the driving force of the driving motor 361 to the large cam gear 372. The large cam gear 372 has integrally formed four disk-like gears. The uppermost gear is a transferring gear 372a, the second gear is a drive source gear 372b, the third gear is a tray driving gear 372c, and the fourth gear is a floating lock-actuating gear 372d. The drive source gear 372b is a spur gear having the diameter larger than that of other gears, and engages with the transmission gear 371. The transferring gear 372a and the floating lock-actuating gear 372d are intermittent gears each having a circular gear section on a part of the circumference thereof. The tray driving gear 372c is an intermittent gear having short gear sections on two section of its circumference, and is provided so that the rotation thereof can be transmitted to the tray gear 374 via the intermediate gear 373. Furthermore, the large cam gear 372 is provided with a brush switch (not shown) that coaxially and synchronism with the large cam gear 372. 4. Swing unit 400 A swing chassis 425 of the swing unit 400 is a substantially triangular plate provided on the vertical-tracking chassis 350, as shown in FIGS. 12 and 17. The swing chassis 425 is provided so as to rotate about a transfer-rotation shaft 425a formed near the right end thereof. As shown in FIG. 17, a transfer-rotation gear 425b is provided coaxially with the transfer-rotation shaft 425a so as to rotate together with the swing chassis 425. The transfer-rotation gear 425b is a partial gear having a gear groove formed in a brush-like end thereof, and is provided at the height where it can engage with the transferring gear 372 of the large cam gear 372. 5. Drive unit 500 (Drive base 510) A drive base 510 on the swing chassis 420 is supported by fixed dampers 513 at the front and right sections thereof, and is supported by a movable damper 514 at the rear left corner thereof, as shown in FIGS. 12 and 17. The movable damper 514 is provided within a moving range of an optical pickup (not shown), and is placed on the swing chassis 420 without being fixed. A damper arm 515 is mounted on the movable damper 514 via a damper shaft 514a. One end of the damper arm 515 is provided on the movable damper 514, and the other end is rotatably coupled to the corner of the drive base 510. A damper arm gear 515a is formed around the other end of the damper arm 515. (Floating lock mechanism 550) A floating lock mechanism 550 consists of a floating lock gear 556, a first lock plate 552, a second lock plate 553, a reverse link gear 554 and a helical extension spring 555, as shown in FIG. 17. The floating lock gear 556 is a gear provided coaxially with the transfer-rotation shaft 425a of the swing chassis 420 so as to rotate independently of the swing chassis 420. The floating lock gear 556 is a partial gear having a gear groove formed in a brush-like end thereof, and is provided at a height where it can engage with the floating lock gear 372d of the large cam gear 372. Furthermore, the floating lock gear 556 is partially rotatably coupled to the left end section of the first lock plate 552. The reverse link gear 554 is rotatably provided between the first lock plate 552 and the second lock plate 553 of the swing chassis 420. Both ends of the reverse link gear 554 engage with racks provided on the first and second lock plates 552 and 553. Since the action of the first lock plate 552 is transmitted as an action in the reverse direction to the second lock plate 553 via the reverse link gear 554, the lock plates 552 and 553 are operatively associated with each other to slide in the reverse direction. Furthermore, the first lock plate 552 is provided with a hook 552c, and both ends of the helical extension spring 555 are engaged with the hook 552c and the swing chassis 420, so that both lock plates 552 and 553 are urged in a direction to approach each other. In addition, a damper rotating gear 516 is provided at the rear left end section of the drive base 510. Both ends of the damper rotating gear 516 engage with a rack provided on the second lock plate 552 and the damper arm gear 515a, respectively. Accordingly, the action of the second lock plate 552 is transmitted to the damper arm gear 515a via the damper rotating gear 516, thereby rotating the damper arm 515. 6. Magazine eject unit 600 A magazine eject unit 600 consists of a rack plate 650, a catching arm 660, and an ejecting member 630, as shown in FIG. 12. (Rack plate 650) The rack plate 650 is a plate provided in front of the shift cam gear 312 formed on the bottom surface of the chassis unit 1 so as to slide in a lateral direction. A loading rack 650a is formed on the rear section of the rack plate 650 at a position corresponding to the lower gear 312c of the shift cam gear 312. A U-shaped cutout 650a is formed in the front section of the rack plate 650. (Catching arm 660) The catching arm 660 is a plate provided in front of the rack plate 650 formed on the bottom surface of the chassis unit 1. The right end of the catching arm 660 is rotatably mounted to the chassis unit 1. A projection 660a that engages With the cutout 650b of the rack plate 650 is formed at rear end of the catching arm 660. Furthermore, the left end of the catching arm 660 is rotatably coupled to the rear end of the ejecting member 630. The configuration of the ejecting member 630 of this embodiment is the same as that of the first embodiment. Similarly to the first embodiment, a loading start switch 10 and an eject end switch 11 are provided for detecting the rotation position of the catching arm 660. (2) Operation Operations of the disk apparatus are as follows. 1. Magazine loading operation (Magazine united state) The magazine casing 100 mounted in the chassis unit 1 is in a locked state in which the division of the magazine upper section 120 and the magazine lower section 130 is restricted. That is, similarly to the first embodiment, the partition 123b constituting the uppermost slit 123 is formed to be the longest, and the partition 132b constituting the corresponding lower slit section 132 is formed to be the shortest of other slits 123a. Therefore, the uppermost slit 123b shifts toward the lower slit section 132 at the boundary of the upper slit section 123 and the lower slit section 132. Due to the above configuration, in a state before rotating the tray 110, i.e., in a state where all of the tray-supporting projections 117 and 118 are drawn toward the lower slit section 132, only the uppermost tray-supporting projections 117 and 118 are located over the boundary of the upper slit section 123 and the lower slit section 132, and the lower tray-supporting projections 117 and 118 completely enter into the lower slit section 132, as shown in FIG. 18A. This allows vertical shift of the slit sections 123 and 132 to be restricted, so that the magazine upper section 120 and the magazine lower section 130 are in the locked state. (Initial state) As shown in FIG. 12, in the initial state in which the magazine casing 100 is not inserted, the ejecting member 630 is located at the front together with the left end of the catching arm 660. In this state, when the magazine casing 100 is inserted from the magazine insertion opening 2 of the chassis unit 1 in a direction in which its circular corner be the left rearward, a catching section 631 of the ejecting member 630 is engaged with the recess 131a formed in the outer bottom surface of the lower plate of the magazine lower section 130. When the magazine casing 100 is further pressed rearward, the ejecting member 630 slides rearward to press the left end of the catching arm 660 rearward, so that the catching arm 660 is rotated clockwise. Then, the loading motor 311 is started by the loading start switch 10 to rotate the shift cam gear 312 counterclockwise. As described above, since the lower gear 312c of the shift cam gear 312 engages with the loading rack 650a of the rack plate 650, the counterclockwise rotation of the shift cam gear 312 allows the rack plate 650 to slide rightward. Then, the cutout 650a of the rack plate 650 urges the projection 660a of the catching arm 660 rightward, so that the catching arm 660 further rotates clockwise to move the ejecting member 630 rearward. Accordingly, the catching section 631 engaged with the recess 131a further pulls the magazine casing 100 rearward. At the point when the ejecting member 630 reaches the rearmost end, the lower gear 312c of the shift cam gear 312 faces the loading lack 650a of the rack plate 650 at its non-toothed portion. Thus, the rack plate 650 stops sliding, and the catching arm 660 stays at a loading completion position. When the magazine casing 100 is mounted in the chassis unit 1, similarly to the first embodiment, both ends of the magazine upper section 120 are gripped by the upper gripping pawls 210a of the magazine holder 210, and both ends of the magazine lower section 130 are gripped by the lower gripping pawls 2a of the chassis unit 1. 2. Disk selecting operation When the shift cam gear 312 further rotates counterclockwise following the placement of the magazine casing 100 as described above, the toothed portion of the intermediate gear 312b engages with the vertical-shifting rack 321 of the rear shift plate 320. Then, the rear shift plate 320 slides leftward, so that the vertical-guiding pin 351 formed on the rear of the vertical-tracking chassis 350 is urged upward by the rear stepped cam 322, as shown in FIG. 16. Simultaneously the link plate 330 urged by the rear shift plate 320 rotates, and the left shift plate 340 slides forward, so that the vertical-guiding pin 351 formed on the left of the vertical-tracking chassis 350 is urged upward by the left stepped cam 341 of the left shift plate 340. Accordingly, the vertical-guiding pins 351 are urged upward, and the vertical-tracking chassis 350 moves upward. When the arrival of the vertical-tracking chassis 350 at a position corresponding to a desired tray 110 (the third tray 110 from above) is detected by the photodetector 15, a stop signal is transmitted to the loading motor 311 to stop the loading gear 310. Thus, the rear shift plate 320 is stopped, and the vertical-tracking chassis 350 is stopped. 3. Magazine unlocking operation (Initial state) The tray gear 374 corresponds to the gear groove 116a formed in the tray 110 in the magazine casing 100, as shown in FIG. 12. The intermediate gear 373 faces the non-toothed portion of the tray driving gear 372c of the large cam gear 372, so that the intermediate gear 373 and the tray gear 374 are stopped. (Upward movement of the drive unit 370) When the disk selecting operation is effected by the upward movement of the vertical-tracking chassis 350 from the initial state as described above, the drive unit 370 also moves upward. Then, the gear groove 116a of the desired tray 110 (the third tray 110 from above) and the gear grooves 116a of the higher trays 110 engage with the tray gear 374. (Rotation of the tray 110) Next, the driving motor 361 is started to rotate the large cam gear 372 clockwise. Then, the toothed portion of the tray driving gear 372c meshes with the intermediate gear 373, and the intermediate gear 373 rotates counterclockwise, so that the tray gear 374 rotates clockwise. Therefore, the three trays engaged with the tray gear 374 by the gear grooves 116a thereof rotate counterclockwise simultaneously. At this time, the periphery of the trays 110 are guided by the side walls 122a provided on the magazine upper section 120. (Unlocking) When the trays 110 are rotated, the tray-supporting projections 117 and 118 formed on the periphery of the trays 110 enter into the slits 123a of the upper slit section 123, as shown in FIG. 18B. At this time, the uppermost tray-supporting projections 117 and 118 also moves toward the upper slit section 123 from the uppermost boundary of the upper slit section 123 and the lower slit section 132, so that there is no member for restricting the vertical shift of the slit sections 123 and 132. Accordingly, the magazine upper section 120 and the magazine lower section 130 are placed in an unlocked state. Since the tray-supporting projections 117 and 118 of the rotated three trays 110 are supported only be the upper slit section 123, the trays 110 are released from the magazine lower section 130 so as to be lifted together with the magazine upper section 120. In addition, the tray-supporting projection 117 is pressed inward by the protuberance 123d formed in the slit 123a, and the pressed section 119a is pressed by the presser surface 127 formed on the magazine upper section 120, so that the disk holding projections 117a and 119 projects inward to hold the disk D. (Stop of the tray gear 374) When the large cam gear 372 further rotates clockwise after the trays 110 have been rotated by predetermined degrees, the toothed portion of the tray driving gear 372 is disengaged from the intermediate gear 373 and the non-toothed portions thereof face each other, so that the tray gear 374 is stopped together with the intermediate gear 373. Accordingly, the rotation of the trays 110 is stopped in the disk holding state as described above. 4. Magazine dividing operation (Upward movement of the magazine holder 210) When the magazine shift motor is started after unlocking the magazine casing 100 as described above, the right magazine shift plate 270 slides rearward. Accordingly, as shown in FIG. 19, the inclined cams 271 formed in the right magazine shift plate 270 urges the right holder guide pins 211 upward. Simultaneously, as shown in FIG. 12, the right end of the magazine shift link 260 coupled to the right magazine shift plate 270 is urged rearward, so that the magazine shift link 260 rotates counterclockwise. Then, as shown in FIG. 13. the left magazine shift plate 250 coupled to the left end of the magazine shift link 260 is biased to slide forward. Accordingly, the inclined cam 251 formed in the left magazine shift plate 250 urges the left holder guide pin 211 upward. When the holder guide pins 211 are biased upward as described above, the magazine holder 210 moves upward to the magazine full-open position, and the position of the magazine shift plates 240 is detected by the magazine open switch 14, and the magazine shift motor 221 is stopped. (Division of the magazine) By the upward movement of the magazine holder 210, the magazine upper section 120 gripped by the upper gripping pawls 210b is lifted together with the three trays 110. The magazine lower section 130, however, stays downward together with the two trays 210 because it is gripped by the lower gripping pawls 2a. Accordingly, the magazine casing 100 is divided into upper and lower sections in the chassis unit 1. In addition, the disk D on the magazine upper section 120 is held by the disk-holding projections 117a and 119 of the tray 110, it moves upward together with the tray 110 without dropping. 5. Swing unit transferring operation (Rotation of the swing chassis 420) The driving motor 361 is driven to further rotate the large cam gear 372 clockwise after the completion of the division of the magazine casing 100. Then, as shown in FIG. 20, the toothed portion of the transferring gear 372a meshes with the transfer-rotation gear 425b, so that the swing chassis 420 starts to rotate clockwise about the transfer-rotation shaft 425a. When the swing chassis 420 is continuously rotated, the overall swing unit 400 is transferred into the space between the divided magazine upper section 120 and the magazine lower section 130. When the turntable 520 reaches the center of the disk D, an end of the swing chassis 420 abuts against a control section (not shown) provided on the vertical-tracking chassis 350 to stop. When such a completion of transferring of the swing chassis 420 is detected by the brush switch 364, the driving motor 361 is stopped. 6. Disk chucking operation The drive unit 500 formed on the swing unit 400 that has been transferred as described above is in a floating locked position, and the turntable 520 is located at a position corresponding to the center hole of the disk D. In this state, when the magazine shift motor 221 is started to move the magazine holder 210 to the disk chucking position, the position of the magazine shift plate 240 is detected by the chucking switch 13, and the magazine shift motor 221 is stopped. When the magazine holder 210 moves downward to the intermediate position, the magazine upper section 120 held by the magazine holder 210 also moves downward. Then, the disk D held in the third tray 110 is pressed onto the turntable 520, and the disk insertion section 524 is inserted into the center hole of the disk D, and the hooking section 525a of the disk hook 525 engages with the upper end of the center hole of the disk D, so that the disk D is held on the turntable 520. 7. Disk releasing operation (Rotation of the tray 110) The driving motor 361 is driven to further rotate the large cam gear 372 clockwise after the completion of the disk chucking operation. Then, the toothed portion of the tray driving gear 37c meshes with the intermediate gear 373, and the intermediate gear 373 is rotated counterclockwise, so that the tray gear 374 is rotated clockwise. Therefore, the three trays 110 engaged with the tray gear 374 by the gear grooves 116a thereof are further rotated counterclockwise. (Release of the disk D) At this time, the tray-supporting projection 117 is disengaged from the protuberance 123d formed in the slit 123a, as shown in FIG. 18C, and the pressed section 119a is allowed to come off the presser surface 127 provided on the magazine upper section 120. Thus, the disk-holding projections 117a and 119 return outside to release the disk D. 8. Magazine retracting operation When the magazine shift motor 221 is started to move the magazine holder 210 upward to the magazine full-open position after releasing the periphery of the disk D as described above, the position of the magazine shift plate 240 at this time is detected by the magazine open switch 14, and the magazine shift motor 221 is stopped. When the magazine holder 210 moves upward to the magazine full-open position again as described above, the magazine upper section 120 held by the magazine holder 210 also moves upward. Accordingly, three trays 110 in the magazine upper section 120 are lifted except one disk D chucked on the turntable 520, whereby a clearance required for the playback of the disk D is conserved. 9. Floating lock releasing operation When the large cam gear 372 further rotates clockwise after the completion of the magazine retracting operation, the floating lock-actuating gear 372d meshes with the floating lock gear 556, so that the floating lock gear 556 is rotated counterclockwise. Then, as shown in FIG. 21. since the floating lock gear 556 is partially rotatably coupled to the left end section of the first lock plate 552, the first lock plate 552 slides in a direction shown by the arrow in the drawing. The action of the first lock plate 552 is transmitted as the action in the reverse direction to the second lock plate 553 via the reverse link 554, so that the second lock plate 553 and the first lock plate 552 slide in the reverse direction. Therefore, the conical projections 511a of the drive base 510 are released from the locking holes 552a and 553a formed in the first and second lock plates 552 and 553. Furthermore, since the action of the second lock plate 552 is transmitted to the damper arm gear 515a via the damper rotating gear 516, the damper arm is rotated counterclockwise. Then, the movable damper 514 retracts from the movable range of the optical pickup 530 (accommodation position) to the outside of the drive base 520 (playback position) to support the drive base 520 in this state. Accordingly, the drive base 510 is placed in a floating state supported only by two fixed dampers 513 and one movable damper 514. 10. Disk playback operation After placing the drive base 510 in the floating state as described above, the playback operation of the disk D on the turntable 520 is performed. Since the drive base 520 is in the floating state, external vibrations are absorbed by the dampers 511, and the turntable 520 and the optical pickup 530 are not affected by the vibrations, so that information of the disk-D can be read accurately. 11. Disk re-accommodating operation An operation for re-accommodating the playback-completed disk D in the tray 110 of the magazine casing 100 will now be described. (Floating re-locking operation) When the driving motor 361 is started to rotate the large cam gear 372 counterclockwise after stopping the rotation of the turntable 520, the floating lock gear 556 is rotated clockwise. Then, the first lock plate 552 slides leftward and the second lock plate 553 slides rightward, so that the conical projections 511a of the drive base 510 engage with the locking holes 552a and 553a. Further, the action of the second lock plate 553 is transmitted to the damper arm gear 515a via the damper rotating gear 516, and the damper arm 515 rotates clockwise, so that the movable damper 514 returns from the outside of the drive base 520 (playback position) into the movable range (accommodation position). (Disk re-gripping operation) When the magazine shift motor 221 is started to move the magazine holder 210 downward to the disk chucking position in a state where the drive base 510 is floating locked to restrict displacement thereof, the position of the magazine shift plate 240 at this time is detected by the chucking switch 13, and the magazine shift motor 221 is stopped. When the magazine holder 210 moves downward to the disk chucking position again as described above, the third tray 110 in the magazine upper section 120 approaches the disk D on the turntable 520. When the driving motor 361 is continuously driven to rotate the large cam gear 372 counterclockwise, the toothed portion of the tray driving gear 372c meshes with the intermediate gear 373, and the intermediate gear 373 is rotated clockwise, so that the tray gear 374 is rotated counterclockwise. Therefore, three trays 110 engaged with the tray gear 374 by the gear grooves 116a thereof are rotated clockwise. At this time, since the tray-supporting projection 117 is pressed by the protuberance 123d formed in the slit 123a, and the pressed section 119a is pressed by the presser surface 127 formed on the magazine upper section 120, the disk-holding projections 117a and 119 project inward to hold the disk D. (Disk chucking releasing operation) When the magazine shift motor 221 is started to move the magazine holder 210 upward to the magazine full-open position, the position of the magazine shift plate at this time is detected by the magazine open switch 14, and the magazine shift motor 221 is stopped. When the magazine holder 210 moves upward to the magazine full-open position, the magazine upper section 120 held by the magazine holder 210 also moves upward. Accordingly, the disk D held by the disk-holding projections 117a and 119 of the third tray 110 falls out of the disk insertion section 524 at its center hole, and moves upward together with the magazine upper section 120. (Swing unit drawing operation) The driving motor 361 is driven to rotate the large cam gear 372 counterclockwise after releasing the chucking of the disk D. Then, the toothed portion of the transferring gear 372a meshes with the transfer-rotation gear 425b, so that the swing chassis 420 starts to rotate clockwise about the transfer-rotation shaft 425a. When the swing chassis 420 continues to rotate, the overall swing unit 400 is drawn out of the space between the divided magazine upper section 120 and the magazine lower section 130 to return to the initial position of the left rearward of the chassis unit 1. (Magazine uniting operation) When the magazine shift motor 221 is started to move the magazine holder 210 downward to the magazine insertion-ejection position after the swing unit 400 has been drawn out as described above, the position of the magazine shift plate 240 at this time is detected by the magazine close switch 12, and the magazine shift motor 221 is stopped. The magazine upper section 120 gripped by the magazine holder 210 moves downward together with the three trays 110 to be united with the magazine lower section 130 that has been stayed downward with the two trays 110. (Magazine locking operation) When the large cam gear 372 is rotated counterclockwise, the toothed portion of the tray driving gear 372 meshes with the intermediate gear 373, and the intermediate gear 373 is rotated clockwise, so that the tray gear 374 rotates counterclockwise. Therefore, the three trays 110 engaged with the tray gear 374 by the gear grooves 116a thereof are further rotated clockwise. When the trays 110 are rotated as described above, the tray-supporting projections 117 and 118 enter the slits 132a of the lower slit section 132. At this time, only the uppermost tray-supporting projections 117 and 118 are located over the boundary of the upper slit section 123 and the lower slit section 132, and the lower tray-supporting projections 117 and 118 completely enter into the lower slit section 132. Accordingly, the magazine upper section 120 and the magazine lower section 130 are placed in a locked state. 12. Vertical-tracking chassis moving-down operation When the loading motor 311 is started to rotate the sift cam gear 312 clockwise after the completion of locking of the magazine casing 100 as described above, the toothed portion of the intermediate gear 312b engages with the vertical-shifting rack 321 of the rear shift plate 320. Then, the rear shift plate 320 slides in a lateral direction, so that the vertical-guiding pin 351 of the vertical-tracking chassis 350 is urged downward by the rear stepped cam 322. Simultaneously, the link plate 330 urged by the rear shift plate 320 is rotated, and the left shift plate 340 slides rearward, so that the vertical-guiding pin 351 formed on the left of the vertical-tracking chassis 350 is urged downward by the left stepped cam 341 of the left shift plate 340. Since the vertical-guiding pins 351 are urged downward as described above, the vertical-tracking chassis 350 moves downward to return to the initial lowermost position. The intermediate gear 312b of the shift cam gear 312 faces the vertical-shifting rack 321 at its non-toothed portion, so that the rear shift plate 320 is stopped. 13. Magazine ejecting operation When the shift cam gear 312 is continuously rotated clockwise, the lower gear 312c engages with the loading rack 650a of the rack plate 650. so that the rack plate 650 slides leftward. Then, the cutout 650b of the rack plate 650 urges the projection 660a of the catching arm 660 leftward, so that the catching arm 660 is rotated counterclockwise to move the ejecting member 630 forward. The catching section 631 of the ejecting member 630 engages with the recess 131a of the magazine lower section 130, the magazine casing 100 is ejected with the forward movement of the ejecting member 630. When the magazine casing 100 is ejected from the magazine insertion opening 2 by a predetermined amount, the loading motor 311 is stopped by the eject end switch 11, and the loading arm 620 stays at the ejecting completion position. In this state, the user pulls the magazine casing 100 out of the magazine insertion opening 2. (3) Effects The embodiment described above offers the following advantageous effects. That is, since the disk D is held by forming the protuberance 123d within the upper slit section 123, locking of the magazine casing 100, selection of the disk, holding of the tray 110, releasing and holding of the disk can be realized by a simple configuration. In addition, when the swing chassis 420 is not transferred, the movable damper 514 is located at the accommodation position. Thus, space required for the movable damper 514 is saved, thereby allowing a reduction in size of the overall apparatus. Since the movable damper 514 reaches the retracted position when the swing unit 400 is transferred, sufficient distance between the dampers is secured, and the vibration-reducing capability is not damaged. Furthermore, since the movable damper 514 is rotated in synchronism with the floating lock mechanism 550, the movable damper 514 can be moved to the retracted position only when damper support is required. Modifications The present invention is not limited to the embodiment described above, and factors such as the number, shape, size, and so forth of each member may be changed as necessary. For example, any number of the trays 110 may be provided in the magazine casing 100 as long as the plural number. Accordingly, the number of the slits 123a, 132a, and 212 may be changed. In addition, any of the trays 110 other than the third tray 110 may be selected by lifting the vertical-tracking unit 300. It is possible that the magazine casing 100 is divided by moving upward and downward the magazine lower section 130, and the disk D is chucked on the downward-facing turntable 520 to perform disk playback operation. In addition, any disk-like recording medium may be employed in the present invention. The present invention may be applied not only to playback apparatuses but also to apparatuses capable of recording and playback. As will be understood from the foregoing description, the present invention provides a compact disk apparatus that can provide a transfer structure of a disk playback section and a lift structure of a magazine holder in a narrow space. Further, the present invention provides a compact disk apparatus that can save space for dampers without damaging the vibration-reducing capability. Still further, the present invention provides a disk apparatus that can more firmly hold a swing unit provided with a disk playback section, and that is resistant to vibrations during playing back of the disk.

Claims: A disk apparatus comprising: a disk magazine (100) having a plurality of trays (110), each tray (110) having mounted therein a disk (D), said disk magazine (100) divided into upper and lower sections (120, 130); a chassis unit (1) for mounting therein said disk magazine (100); a magazine dividing section for dividing and uniting the trays of said disk magazine (100) mounted in said chassis unit (1); a disk selecting section for selecting a desired disk (D); a swing unit (400) adapted to be transferred into a space between the trays of the divided upper and lower sections (120, 130) of said disk magazine (100); and a disk playback section provided with an optical pickup (530) on said swing unit (400) for playing back the disk (D) selected by said disk selecting section; said disk playback section is supported on said swing unit (400) by a plurality of dampers (511, 514); characterised in that at least one of said dampers (511, 514) is a movable damper (514) provided so as to move between an accommodation position within a movable range of said optical pickup (530) and a retracted position beyond the movable range of said optical pickup (530). The disk apparatus according to claim1, further comprising: a floating lock mechanism (550) for providing a floating locked state in which deviation of said disk playback section is restricted before said swing unit (400) is transferred, and for providing a floating locked state in which said disk playback section is supported by only said dampers (511, 514) after said swing unit (400) has been transferred; and a gear mechanism for synchronizing said floating lock mechanism (550) and said movable damper (514) so that said movable damper (514) is located on said accommodation position when said disk playback section is in the former floating locked state, and said movable damper (514) is located at said retracted position when said disk playback section is in the latter floating locked state.

Inventors: TAKAI KAZUKI, TAKAI, KAZUKI, Takai, Kazuki c/o Clarion Co., Ltd.
Applicants: CLARION CO LTD, CLARION CO., LTD.
Application year: 1999
Main classification: G11B17
IPC codes: G11B17, G11B33