Disc tray and disc player employing the disc tray

Abstract: A disc player according to the first aspect of the aspect of the present invention includes present invention has a disc holding member movable in parallel to the surface of the disc tray for holding the disc in corporation with the disc tray at least when the disc tray is placed outside the disc player and a disc hold releasing member for disengaging the disc holding member from the disc placed on the disc tray in the course of the disc tray moving toward a prescribed reproducing position in the disc player.

Description: The present invention relates to a disc player such as a CD (compact disc) player or CD-ROM drive. In recent years, disc players such as CD-ROM drives to be built-in a computer are developed more and more, as the disc player which employs an optical disc as a recording medium has been miniaturized and lightweighted. For instance, there is a disc player so constructed that a disc tray for loading or ejecting an optical disc in a vertical position into or out of the disc player. When the disc player is so constructed that the optical disc, i.e., the disc tray is loaded or ejected in a vertical position inside or outside the disc player, some measures have to be took so that the disc is kept in an appropriate position on the disc tray. By the way, the information carrying surface of the disc is required to be sufficiently detached from the disc tray at the disc driving time. For instance, in the disc player which carry the disc tray in the horizontal position, the disc is driven after it is lifted up a little by a turntable from the disc tray. However, when the disc is held by the holding member with its both surface in corporation with the disc tray, the disc can not be lifted up from the disc tray due to the obstruction of the disc holding member. Further, when the disc is held by holding with its both surfaces in corporation with the disc tray, the operations of placing and detaching discs onto or from the disc tray become complicated. It is, therefore, an object of the present invention to provide a disc tray and a disc player wherein the disc tray can be loaded and ejected in the vertical position into and out of the disc player. Another object of the present invention is to provide a disc player which is able to stable hold the disc in the appropriate position of the disc tray at the disc tray loading and ejecting time and detach the disc placed on the disc tray at the disc reproducing time. EP O 315 255 discloses a disc-record player having a holder for receiving a disc tray. The holder can perform a loading movement to move the tray to and deposit the disc on the turntable and to separate the disc from the tray, and an unloading movement to return the disc to the initial position. EP O 129 292 relates to a disc-record player having a disc holder for supporting a disc which can perform a loading movement to deposit the disc on a turntable clear of the disc holder. A disc pressure member is provided to urge the disc against the turntable. According to the invention there is provided a disc player capable of loading and ejecting a disc tray into and out of the disc player when said disc player is vertically oriented, and also capable of loading and ejecting the disc tray into and out of the disc player when said disc player is horizontally oriented, said disc player comprising: a disc holding member movable in parallel to a surface of the disc tray between a first position in which the disc holding member does not hold a disc to the disc tray when the disc is on the disc tray and a second position in which the disc holding member holds a disc to the disc tray when the disc is on the disc tray at least when the disc tray is placed outside of the disc player; and disc hold releasing means for disengaging the disc holding member from the disc placed on the disc tray by bumping against the disc holding member when the disc tray moves toward a prescribed disc reproducing position in the disc player; characterised in that the disc holding member includes members selectively mounted on three or more corners of the disc tray having a rectangular shape; and two of the holding members are aligned with each other along a loading direction of the disc tray and the disc hold releasing means which bump against the two associated disc holding member are staggered in their positions in a direction perpendicular to the surface of the disc placed on the disc tray. Additional objects and advantages of the present invention will be apparent to persons skilled in the art from a study of the following description and the accompanying drawings, which are hereby incorporated in and constitute a part of this specification. For a better understandings of the present invention and many of the attendant advantages thereof, reference will now be made by way of example to the accompanying drawings, wherein: FIGURE 1 is a perspective view for showing one embodiment of the optical disc player according to the present invention; FIGURE 2 is a perspective view for showing the method of assembling the optical disc player in FIGURE 1 to an information processing apparatus; FIGURE 3 is a perspective view for showing the backside arrangement of the optical disc player in FIGURE 1; FIGURE 4 is a perspective view for showing the state that the disc tray is ejected outside the optical disc player shown in FIGURE 3; FIGURE 5 is an exploded view of the optical disc player in FIGURE 1; FIGURE 6 is a perspective view for showing the internal structure of the optical disc player in FIGURE 1 from right side ; FIGURE 7 is a plan view for showing the arrangement of the disc tray; FIGURE 8 is an enlarged plan view for showing the detail of the disc holder 71 mounted on the disc tray; FIGURE 9 is an enlarged plan view for showing the detail of the disc holder 73 mounted on the disc tray; FIGURE 10 is a perspective view for showing the mutual relations among the sliders, the disc tray and the PU unit; FIGURE 11 is a plan view for showing the relation between the disc holder and the disc holder releasing protrusion; FIGURE 12 is a plan view and a side section view for showing the disc hold mechanism; FIGURE 13 is a plan view for showing the state that the disc tray is placed ejected the optical disc player; FIGURE 14 is a plan view for showing the state that the disc tray is loaded into the disc player; FIGURE 15 is a plan view for showing the state that the loading operation of the disc has just completed; FIGURES 16A through 16C are side view for showing the operation at the disc tray loading time; FIGURE 17 is a set of flat, front and side views for showing the states of the disc holders at the time in FIGURE 16A; FIGURE 18 is a set of flat, front and side views for showing the states of the disc holders at the time in FIGURE 16B; FIGURE 19 is a set of flat, front and side views for showing the states of the disc holders at the time in FIGURE 16C; FIGURE 20 is a plan view for showing the state that the disc holders are fastened at positions prevented from engagement with a disc placed on the disc tray; and FIGURE 21 is a perspective view for showing the process for manually placing the disc on the disc tray. The present invention will be described in detail with reference to the attached drawings FIGURES 1 through 21. Throughout the drawings, like or equivalent reference numerals or letters will be used to designate like or equivalent elements for simplicity of explanation. FIGURE 1 is a perspective view showing the externals of the disc player according to the one embodiment of the present invention. The disc player 100 is incorporated in a vertical position, in other words the optical disc is incorporated in a vertical position into the main body of the information processing apparatus 200 such as a personal computer as shown in FIGURE 2. In FIGURE 1, 1 denotes the cabinet, 2 denotes a front panel. On the front panel 2 a disc tray entrance opening 3 for loading or ejecting a disc tray 10 loading thereon an optical disc inside and outside the cabinet 1, an ejection button 4 for electrically commanding the disc tray loading and ejecting and a small hole 5 for annually ejecting the disc tray 10 out the cabinet 1 where a wire or the like is inserted when the automatic driving system of the disc tray 10 has failured due to some troubles. FIGURE 3 is a perspective view showing an internal structure of the optical disc player without cabinet 1 from the underside. FIGURE 4 is a perspective view showing the state that the disc tray 10 is ejected outside the optical disc reproducing apparatus, as shown in FIGURE 3. FIGURE 5 is an exploded view of FIGURE 4. FIGURE 6 is a perspective view showing the internal structure of the optical disc player from the upperside. Here, the cabinet 1 is omitted in the drawings. In these drawings, 20 denotes a mold plastic frame. 30 denotes a pickup unit (hereinafter referred to as the PU unit). 40, 41 denote a pair of sliders for supporting the disc tray 10 and the PU unit 30 and guiding their movement in the flame 20. (Details of the frame 20) On both inner sides of the frame 20, slider supports 21, 21 for supporting the sliders 40 and 41 slidable in the direction of an arrow X-X'. And on the frame 20 a motor 23 for loading or ejecting the disc tray 10 into or out of the cabinet 1 is provided. Further, on the frame 20 as shown in FIGURE 6 a linking bar 24 for installing a link 50 which serves to synchronize the sliders 40 and 41 is mounted. Furthermore, in the frame 20 a disc clamper base 25 for rotatably mounting a disc clamper 60 on the frame 20 is defined. (Details of the disc tray 10) On the disc tray 10 a disc receiving recess 11 for receiving the optical disc (not shown) and a window 12 for exposing a portion of the information carrying surface of the optical disc placed on the disc tray 10 in the moving range of the optical pickup 31. On both sides of the disc tray 10 slider engaging libs 13, 13 are formed along the longitudinal direction of the disc tray 10. The slider engaging libs 13, 13 are fit into guide grooves 42, 42 defined in each sliders 40 and 41 (see FIGURE 10). Accordingly, the disc tray 10 is supported to move in the horizontal position in the direction of the arrow X-X' by the sliders 40 and 41. On one inside of the disc tray 10 a rack gear 14 is defined. The rack gear 14 is connected with the motor 23 through a series of gears. Further, in the disc receiving recess 11 of the disc tray 10 a pinhole 15 is formed. In the pinhole 15 a positioning pin 32 formed on the PU unit 30 is firmly inserted in the pinhole 15so that the disc tray 10 and the PU unit 30 are positioned with each other in their pertinent locations. Further, as shown in FIGURE 7 on each three corners portions of the disc tray 10 disc holders 71, 72 and 73 for holding the edge portion of the optical disc D placed on the disc receiving recess 11 with the disc tray 10 are mounted. Each disc holders 71, 72 and 73 are mounted on the disc tray 10 around axes 74, 75 and 76 in the state that they are rockable in parallel with the disc tray 10. Accordingly, the disc holders 71, 72 and 73 are rockable between the first position (shown by the solid line in the drawing) where they engage with the peripheral edge of the disc D to hold the disc D in corporation with the disc tray 10 and the second position (shown by the dotted line in the drawing) where they apart from the disc D thus releasing the holding of the disc D in corporation with the disc tray 10. 77, 78 and 79 are guide grooves for defining respective rocking angles of the disc holders 71, 72 and 73. Protrusions 71a, 72a and 73a of the disc holders 71, 72 and 73 are inserted in the guide grooves 77, 79 and 79. The detailed construction of the disc holders will be explained in reference to FIGURES 8 and 9. FIGURE 8 is an enlarged view showing the disc holder 71, and FIGURE 9 is an enlarged view showing the disc holder 73. The disc holder 72 has the mirror image shape with the disc holder 71. In FIGURES 8 and 9, 91 denotes a spring member. The spring member 91 is comprised of a coiled portion 91a and two spring arms 91b and 91c extending from the coiled portion 91a. The coiled portion 91a and one spring arm 91b are engaged with hooks 93 and 92 defined on the disc tray 10, while the other spring arm 91c is engaged with the protrusion 71a (73a) of the disc holder 71 (73). The spring member 91 is biased to straddle the spring arms 91b and 91c. Thus the disc holder 71 (73) is so biased by the spring member 91 to rock in the direction of the arrow X, in other words, to the first position to engage with the peripheral edge of the disc D. Further, on each of the disc holders 71, 72 and 73 a receptacle 95 for fastening the disc holder in the second position (the releasing and fastening position of the disc holding) by being fastened with the disc holder fastening pin 94 formed on the disc tray 10 protrudes. By manually rocking the disc holder to the direction of the arrow X and pressing the straddling portion against the disc holder fastening pin 94, the straddling portions of the receptacle 95 can be resiliently deformed to straddle for catching the disc holder fastening pin 94 therein. Thus, the receptacle 25 is combined with the disc holder fastening pin 94. These engagements can be released by simply manually rocking the disc holders 71, 72 and 73 in the direction of the arrow X'. (Details of the PU unit 30) As shown in FIGURES 3 through 5, the PU unit 30 is comprised of an optical pickup 31 for reading information from the optical information carrying surface of the optical disc, a pickup feed mechanism 33 for feeding the optical pickup 31 in the radius direction of the optical disc, a disc drive system having a turntable rotatably holding the optical disc in corporation with the disc clamper 60 and a disc motor 34, a flame 35 for integrally supporting the above described structures, and a circuit board. Here, the positioning pin 22 as mentioned above is integrally mounted on the frame 35. Further, from both sides of the flame 35 guide pins 36a, 36b, 36c and 36d which are inserted through guide slits 43, 44, 45 and 46 defined in the sliders 40 and 41 are projected. (Details of the sliders 40 and 41) FIGURE 10 is a perspective view showing the mutual relations among the sliders 40 and 41, the disc tray 10 and the PU unit 30. As shown in the drawing, on the sliders 40 and 41 longitudinally elongated guide grooves 42, 42 for guiding the disc tray 10 in the direction of the arrows X-X'in corporation with the slider engaging libs 13, 13 formed on the both sides of the disc tray 10 fitting into the grooves 42, 42. Further, on each of the sliders 40 and 41 two guide slits 43, 44 (45, 46) are defined. Then the guide pins 36a, 36b and 36c, 36d projecting from the side of the flame 35 of the PU unit 30 are inserted into the guide slits 43, 44, 45 and 46. Each of the guide slits 43, 44, 45 and 46 has guide channels a, b and c. For example, the guide channels 43a and 43c of the guide slit 43 elongate in the horizontal direction. While the guide channel 43b of the guide slit 43 elongates in the inclined direction to link the horizontal guide channels 43a and 43c together. That is, the guide channels, e.g., 43a through 43c are so constructed to guide the PU unit 30 up-and-down within the prescribed height range according to the sliding movements of the sliders 40 and 41 in the direction of the arrow X-X'. Further, rack gears 47 and 48 are defined on the bottom ends of the sliders 40 and 41. The rack gears 47 and 48 are respectively engaged with gears 51 and 52 fixed on both ends of a shaft 53 of the link 50, as shown in FIGURE 6. Thus, the link 50 is comprised of the shaft 53 and the gears 51, 52 fixed on both ends of the shaft 53, and rotatably mounted in the prescribed position of the flame 20. As a result, the sliders 40 and 41 move together in synchronized relation via the link 50. Further, on one slider 41 another rack gear 49 is engaged with a gear 61 which is coupled to the motor 23 through a series of gears. Further, as shown in FIGURE 11, on each of the sliders 40 and 41 three protrusions 96, 97 and 98 capable of bumping against the disc holders 71, 72 and 73 to rock them toward their second positions where the disc holding is released against the bias of the spring member 91. Here, the slider 41 has two protrusions 97 and 98. The protrusions 97, 98 are staggered their altitudes from each other, i.e., in the direction perpendicular to surface of the disc D so that the protrusion 97 may bump against its only one associated disc holder 72, while the other protrusion 98 may bump against its only one associated disc holder 73. (Details of the disc hold machanism) In FIGURES 5, 6 and 12, denotes a disc clamper mounting base for rotatably mounting the disc clamper 60. The disc clamper mounting base 25 has three hooks 26, 26, 26 for positioning the disc clamper 60 fitted in the disc clamper mounting base 25. Thus the disc clamper 60 is rotatably held between the three hooks 26, 26, 26 and a pedestal 27 defined in lower part of the round opening. Here, the hooks 26, 26, 26 can be resiliently deformed by being depressed by the disc clamper 60 when the disc clamper 60 is mounted into the disc clamper mounting base 25. More in detail, each hook 26 has a tapered end for resiliently deformable by the depression from the disc clamper 60 at the mounting of the disc clamper 60, and a horizontal surface for checking the escape of the disc clamper 60 from the disc clamper mounting base 25 after the disc clamper 60 having been mounted therein. Here, the disc clamper 60 has a magnet (not shown) for holding the optical disc D between the turntable 28 and the disc clamper 60 by attracting with a magnetic substance (not shown) provided on turntable 28. Referring now to FIGURES 13 through 21, the operation of the optical disc player will be explained. (Details of the disc tray loading operation) FIGURE 13 is a plan view showing the state that the disc tray 10 is ejected outside the main body. The disc tray loading operation is initiated by that the user pushes the disc tray 10 in the direction of the arrow X by his/her finger and the like. If the disc tray 10 is forced by a certain distance the motor 23 is turned ON. Then after that the motor 23 drives the entire of clutch gear 64 to rotate in the direction of the arrow, so that the disc tray 10 is loaded into the main body of the apparatus. When the disc tray 10 is loaded into the main body by a prescribed distance, the rear end 10a of the disc tray 10 bumps against one end 81 of a rocking lever 80, as shown in FIGURE 14. The rocking lever 80 is rockably suspended to the frame 20 via an axis 82. The other end 83 of the rocking lever is able to bump against the rear end of the slider 40 for pushing the slider 40 frontward (the direction of the arrow X). Accordingly, the rocking lever 80 is rocked in the direction of the arrow C by the end 81 of the rocking lever 80 bumping against the rear end 10a of the disc tray 10. Then, the slider 40 commences to slide frontward (the direction of the arrow X). According to the frontward (the direction of the arrow X) sliding of the slider 40, the other slider 41 linked with the slider 40 through the link 50 also slides frontward (the direction of the arrow X) in synchronism with the slider 40. Then, as shown in FIGURE 15, when the rear ends 16a and 16b bump against the deepest end 20c of the frame 20 the loading operation of the disc tray 10 finishes. FIGURE 16A is a side view showing the positional relationships among the guide pins 36a, 36b, 36c and 36d of the PU unit 30 and the guide slits 43, 44, 45 and 46 of the sliders 40 and 41 at that time. Here, the dotted lines in the drawing illustrate respective positions of the guide pins 36a, 36b, 36c and 36d at the time that the disc tray 10 is ejected outside the main body of the apparatus. FIGURE 17 includes flat, front and side views for showing the states of the disc holders 71, 72 and 73 at this time. As shown in the drawing, either of the disc holders 71, 72 and 73 does not bump against the protrusions 96, 97 and 98 on the sliders 40 and 41 in this time. And further, since the PU unit 30 does not yet move up-and-down, the PU unit 30 is placed in the state where it does not bump against any of the disc D and turntable 28. On the other hand, as show in FIGURE 15, the slider 40 is placed in the position where the rack gear 49 can engage with the gear 61 in that time. Accordingly, the sliders 40 and 41 are driven furthermore in the direction of the arrow X by the motor 23. According to the movement of the sliders 40 and 41 the PU unit 30 commences to move toward the disc clamper 60. FIGURES 18 and 16B show the states immediately after that the protrusions 96, 97 and 98 on the sliders 40 and 41 have bumped against their associated one of the disc holders 71, 72 and 73 by the movements of the sliders 40 and 41 and PU unit 30. At this time, the turntable 28 has already bumped against the disc D and been in the process of pressing the disc D toward the disc clamper 60. FIGURES 19 and 16C show the states of the disc holders 71, 72 and 73 at the time that the disc tray loading has just finished. At that time, the disc holders 71, 72 and 73 arc rocked toward around the second position by their corresponding protrusions 96, 97 and 98. Here, as mentioned above, the second position represents the position where the disc holding state according to the disc holders 71, 72 and 73 has been released. In order to temporarily release the disc holding it is not necessary to fully rock the disc holders 71, 72 and 73 to their second positions, but enough to rock them toward around the second position. So, the disc D on the disc tray 10 is disengaged from the disc holders 71, 72 and 73, and detached from the disc tray 10 by being pressed by the turntable 28. Thus the disc D is held between the turntable 28 and the disc clamper 60. The disc tray 10 is ejected outside the main body of the apparatus by operating the eject button 4 on the front panel 2. When an eject detecting signal is input the controller controls the motor 23 to drive in opposite direction to the loading time. According to this PU unit 30 moves from the position C (altitude position) to the position A (altitude position) in FIGURE 16, and thus the disc holding is released. After this operation, the disc tray is ejected in the entirely reverse process to the loading process. (Method of using the disc tray in the horizontal position) As well as that the disc tray apparatus can be stably used in the vertical position, as explained above, the disc tray according to the present invention can be used in the horizontal position. In other words, the optical disc D can be simply placed on the disc tray 10. In this case, the disc holders 71, 72 and 73 on the disc tray 10 are left unused. So, when the apparatus is used in the horizontal position, as shown in FIGURES 20, 8 and 9, the straddling portion of the receptacle 95 is pressed against the disc holder fastening pin 94 by manually rocking the disc holders 71, 72 and 73 in the direction of the arrow X. Then the disc holder fastening pin 94 is compelled to be fit into the straddling portion. Accordingly, the disc holders 71, 72 and 73 are fastened in the remote positions from the disc placed on the disc tray not to engage with the disc. (Operation for placing and detaching disc on and from the disc tray) FIGURE 21 shows the state that the disc D is placed on the disc tray 10. As shown in the drawing, when the disc D is placed on the disc tray 10 the disc is leaned forward a little and the lower edge portion of the disc D is inserted between the lowerside disc holders 72, 73 and the disc tray 10. Then by slightly pressing the disc D lowerward, the disc D is moved to one edge of the disc receiving portion (recess) 11 on the disc tray 10 with against with the elasticity of the spring member 91. That is, on the edge of the disc receiving portion (recess) 11 on the disc tray 10 as shown in FIGURE 20, a margin for shifting the disc D to one prescribed position P2 shifted by a little distance from another prescribed position P1 is provided. When the disc D is placed on the disc tray 10, by shifting the disc D to the position P2 the disc D can fit in the disc receiving portion (recess) 11 without engaging with-the-upper disc holder 71. After that, when the user releases the disc D from his/her finger the disc D is lifted up by the elasticity of the spring member 91 engaged with the lower disc holders 72 and 73. Then the upper part of the disc D is inserted between the disc holder 71 and the disc tray 10. As a result, the disc D is moved to the prescribed position P1 (see FIGURE 20) within the disc receiving portion (recess) 11 and stably placed therein. Accordingly, in the optical disc player in the above embodiments, it is possible to easily place the disc D on the disc tray 10 by e.g., one-handed manipulation It is also possible to easily take the disc out from the disc tray 10 by, also one-handed manipulation. According to the disc tray and the disc player employing such a disc tray of the present invention as described above, when the disc tray is ejected outside the disc player, the disc placed on the disc tray is held between the disc tray and the disc holding member. Then the disc holding member is moved to the position where the disc holding is released in the course of that the disc tray is loaded to the prescribed reproducing position in the disc player, or in the course of that the disc is detached from the disc tray placed in the disc player by the disc driving mechanism. Even if the apparatus is used in a vertical position, in other words, the disc is placed in a almost vertical position on the disc tray it is possible to stabilize the disc in the appropriate position of the disc tray, load the disc tray to the prescribed reproducing position within the disc player and detach the disc from the disc tray to reproduce the disc at the reproducing position. As described above, the present invention can provide an extremely preferable disc tray and disc player employing such disc tray. While there have been illustrated and described what are at present considered to be preferred embodiments of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made, and equivalents may be substituted for elements thereof without departing from the true scope of the present invention as defined in the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teaching of the present invention without departing from the central scope thereof. Therefor, it is intended that the present invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out the present invention, but that the present invention includes all embodiments falling within the scope of the appended claims.

Claims: A disc player (100) capable of loading and ejecting a disc tray (10) into and out of the disc player when said disc player is vertically oriented, and also capable of loading and ejecting the disc tray (10) into and out of the disc player (100) when said disc player (100) is horizontally oriented, said disc player (100) comprising: a disc holding member movable in parallel to a surface of the disc tray (10) between a first position in which the disc holding member does not hold a disc to the disc tray when the disc is on the disc tray and a second position in which the disc holding member holds a disc to the disc tray when the disc is on the disc tray at least when the disc tray is placed outside of the disc player; and disc hold releasing means for disengaging the disc holding member from the disc placed on the disc tray by bumping against the disc holding member when the disc tray moves toward a prescribed disc reproducing position in the disc player; characterised in that the disc holding member includes members (71,72,73) selectively mounted on three or more corners of the disc tray having a rectangular shape; and two of the holding members (72,73) are aligned with each other along a loading direction of the disc tray (10) and the disc hold releasing means (97,98) which bump against the two associated disc holding member are staggered in their positions in a direction perpendicular to the surface of the disc placed on the disc tray. A disc player as claimed in claim 1 wherein the disc holding member is movably mounted on the disc tray (10) along a surface which is parallel to a surface of the disc placed on the disc tray (10), said disc holding member being movable between a first position in which the disc holding member does not hold a disc to the disc tray (10) when the disc faces the disc tray (10) and a second position in which the disc holding member holds a disc to the disc tray (10) when the disc faces the disc tray (10), at least when the disc tray (10), is placed outside of the disc player (100). A disc player as claimed in claim 2 wherein the disc player (100) further comprises a disc driving mechanism (28,60) mounted in the disc player for detaching a disc from the disc tray loaded in the disc player in the direction generally perpendicular to the disc face, and for driving the disc. A disc player as claimed in claim 3 wherein the disc driving mechanism (28,60) drives the disc by holding the disc. A disc player as claimed in any one of claims 1 through 4, further comprising a biasing means for biasing the disc holding member to move into the disc holding position. A disc player as claimed in any preceding claim wherein: said disc tray (10) further comprises a disc receiving portion for receiving the disc, and biasing means for biasing the disc holding member towards the holding position. A disc player as claimed in any preceding claim wherein said disc tray further comprises: a disc receiving portion for receiving the disc; a disc interposing member defined on one side of the tray along the tray loading direction for interposing the edge of the disc with the disc receiving portion; and biasing means for biasing the disc holding member toward the holding position. A disc player as claimed in any preceding claim further comprising a fastening means for fastening the disc holding member at a prescribed position where the disc holding member is releasable.

Inventors: HAYASHI HIROFUMI, KISHIMOTO FUMIAKI, SAITO KOJI, HAYASHI, HIROFUMI, KISHIMOTO, FUMIAKI, SAITO, KOJI, Hayashi, Hirofumi, c/o Int. Prop. Div., Kishimoto, Fumiaki, c/o Int. Prop. Div., Saito, Koji, c/o Int. Prop. Div.
Applicants: TOSHIBA KK, KABUSHIKI KAISHA TOSHIBA
Application year: 1996
Main classification: G11B17
IPC codes: G11B17