Abstract:
A disk device is provided with an MD carrying mechanism which uptakes an MD  24 , places the MD  24  on a turntable, and performs the ejection of the MD  24  from the turntable by the displacement of the holder drawing lever  39  which forms part of a linking mechanism when the cartridge of the MD  24  is inserted into an MD holder. The disk device also comprises a clamp lever avoidance mechanism which refuges the clamp lever  17 , which is used for clamping the CD  200 , to a position which does not interfere with the uptake and ejection of the MD during uptake and ejection of the MD by the MD carrying mechanism.

Description:
CROSS-REFERENCE TO THE RELATED APPLICATION 
     This Application is a continuation of International Application No. PCT/JP99/00594, whose International filing date is Feb. 12, 1999, the disclosures of which Application are incorporated by reference herein. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a disk device which can load information recording media of different types on a turntable and eject the information recording media from the turntable. Such information recording media may include an MD (Mini Disk) for example which is stored in a cartridge or a CD (Compact disk) which is used as a single disk. 
     2. Description of the Related Art 
     FIGS. 1 and 2 are schematic lateral figures of a loading device which is disclosed in for example JP-A-8-87796. FIG. 3 is a similar schematic plan figure. In FIGS. 1 and 2, reference numeral  400  denotes a disk which is a circular information recording medium,  401  is a cartridge in which an information recording medium  401   a  is stored,  399  is an insertion aperture of a cartridge  401  or a disk  400  provided in the front face of the device.  410  is a first roller the surface of which is formed by a high friction elastic member such as rubber, and which rotates bi-directionally in the direction of the arrow  410 A or  410 B about a fixed shaft  410   a .  420  is a second roller the surface of which is formed by a high friction elastic member such as rubber, and which rotates bi-directionally in the direction of the arrow  420 A or  420 B about a fixed shaft  420   a .  423  is a second guiding body which is supported in free rotation about a fixed shaft  423   a .  421  is a second guiding face which is provided on the second guiding body  423  and which has low frictional resistance due to the provision of a resin coating or the like.  422  is a second contacting means one end of which is fixed and the other end of which is compressed so that the second guiding face  421  of the second guiding body  423  is pressed onto the second roller  420 .  413  is a first guiding body which is provided on the second guiding body  423  and which is supported in free rotation about an shaft  413   a .  411  is a first guiding face which is provided on a first guiding body  413  and which has low frictional resistance due to the provision of a resin coating or the like.  412  is a first contacting means one end of which is fixed to the second guiding body  423  and the other end of which is compressed so that the first guiding face  411  of the first guiding body  413  is pressed onto the first roller  410 .  424  is a cam which is normally pressed onto the second guiding body  423  by the second contacting means  422 . The cam  424  supports the second guiding body  423  by rotational movement so that the second guiding body  423  is supported in two positions, one high and one low.  301  is a head chassis which is supported in free rotation about an enlarging central shaft  301   a .  310  is a head which performs recording and playing of the disk  400  or the information recording medium  401   a  stored in the cartridge  401 .  311  is a guide shaft which is fixed at both ends to the head chassis  301 . The guide shaft  311  supports the head  310  and guides the head  310  through sliding motion in the direction of the arrow  310 A or  310 B.  312  is a disk motor which is identified with the head chassis  301 .  313  is a turntable which is fixed to a rotational axis of the disk motor  312  and which is provided with a magnetic plate  313   a  on its upper face.  302  is a clamp arm which is supported to be rotatable about the enlarging central shaft  301   a .  321  is a clamp which is supported to be rotatable about the clamp arm  302  and which is provided on the lower face of the magnetic plate  321   a .  330  is a sensor which is disposed in proximity to an insertion aperture  399  and which detects a cartridge  401  or a disk  400 .  331  is a sensor which detects a recording/playing position of a disk  400  at the innermost position of the device.  428  is a cartridge stopper which determines a recording/playing position of a cartridge  401 . 
     With reference to FIG. 3,  415  is a disk position determining arm which is supported to be rotatable about a fixed shaft  415   a .  416  is a disk position determining pin (stopper member) which is fixed to the distal rotational end of the disk position determining arm  415  and which extends downwardly to a height which obstructs the carrying path of the disk  400 .  417  is a compression means which provides pressure so that the disk position determining pin  416  rotates the disk positioning arm  415  in the direction of the arrow  415 A so that it separates from the positioned disk  400 .  425  is a disk position release arm which is supported to be rotatable about a fixed shaft  425   a . The bent section  425   b  on the rotating distal end and is bent to a position which extends downwardly to a height which obstructs the carrying path of the cartridge  401  but which does not obstruct the carrying path of the disk  400 .  426  is a disk position release pin which is fixed on the disk position release arm  425  and which extends to a height which abuts with the disk position determining arm  415 .  427  is a pressing means which is compressed so that the disk position releasing arm  425  is rotated in the direction of the arrow  425 A. The disk position releasing arm  425  is held by the compression means  427  against the edge of the hole  1126  in which the disk position releasing pin  426  is fixed. The disk position determining arm  415  is secured to a fixed position abutting against the disk position release pin  426  by the pressure of the compression means  417 . When a carried disk  400  abuts with and is stopped by the disk position determining pin  416 , recording and playing of the disk  400  is performed in that position by the head  310 . 
     The operation of the conventional disk device will now be explained. 
     When a disk  400  is inserted into this disk device, the disk  400  is tightly gripped between the first roller  410  and the first guide face  411  by the first contacting means  412 . The disk  400  is carried to a fixed position in the disk device by the rotations of a first roller  410 . When a cartridge  401  is inserted, the cartridge  401  is tightly gripped between the second roller  420  and the second guide face  421  by the second contacting means  422 . The cartridge  401  is carried to a fixed position in the disk device by the rotations of a second roller  420 . In particular, while the disk  400  is carried, the second roller  420  and the second guide face  421  are removed from the disk carrying path. In the same way, while a cartridge  401  is being carried, the first roller  410  and the first guide face  411  are removed from the cartridge carrying path. 
     Since a conventional disk device is constructed as above, both first and second rollers are necessary to respectively carry a disk and a cartridge. Therefore, problems have arisen regarding increases in the complexity of the structure and reduced reliability. 
     SUMMARY OF THE INVENTION 
     The present invention is proposed to solve the above problems and has the object of providing a disk device with improved reliability and a simplified structure which can be used with any information recording media which is used by storage in a cartridge such as an MD or an information recording media which is used as a single disk such as a CD. 
     The disk device of the present invention comprises a circular disk carrying device which has a carrying roller for performing the loading and ejection of a circular disk, and a cartridge carrying device which is provided with a holder for supporting a cartridge, said cartridge carrying device loading a disk storing cartridge when the cartridge is inserted in the holder by the displacement of a carrying arm which comprises one part of a linking structure, which places a loaded disk stored in a cartridge on a turntable and which ejects a disk stored in a cartridge from a turntable. 
     In this way, it is possible to use circular disks or disk storing cartridges of differing sizes and to perform the loading and ejection of the respective disks with a relatively simple structure and with high reliability. 
     The disk device of the present invention has a CD guide which guides a circular disk which is carried by a carrying roller from its upper side and in which an MD holder is disposed in a position in which it forms part of said CD guide. 
     In this way, it is possible to integrate the MD holder and the CD guide and reduce the width of the device. 
     A disk device according to the present invention disposes an MD holder in a central section of the CD guide and divides the CD guide on both sides of the MD holder. 
     In this way, it is possible to integrate the MD holder and the CD guide and reduce the width of the device. 
     In a disk device according to the present invention, the lower face of an MD holder is adapted to act as part of a CD guide when a CD is carried. 
     In this way, the carrying of a circular disk may be stabilized and it is possible to effectively avoid accidents which damage the disk. 
     A disk device according to the present invention comprises an MD insertion mouth screen, into which a cartridge which stores a circular disk is inserted and which acts as a displaceable base for an MD insertion mouth for inserting a disk into an MD holder, and an MD holder aperture enlarging mechanism which enlarges the MD holder aperture into which a cartridge is inserted by the force which acts on the MD insertion mouth screen when the screen is rotated by the insertion of a cartridge. 
     As a result, the insertion of circular disks stored in a cartridge such as an MD into the MD holder is facilitated and user-friendliness is improved. 
     The disk device of the present invention allows the aperture of the MD holder to be enlarged as the MD holder aperture enlargement mechanism displaces downwardly by rotating the lower face of the aperture of the MD holder. 
     This arrangement facilitates the insertion of a disk stored in a cartridge such as an MD into an MD holder and increases user-friendliness. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a schematic lateral figure of a conventional loading device as disclosed in JP-A-8-87796. 
     FIG. 2 s a schematic lateral figure of a conventional loading device as disclosed in JP-A-8-87796. 
     FIG. 3 s a schematic plan figure of a conventional loading device as disclosed in JP-A-8-87796. 
     FIG. 4 is a three-dimensional representation of a disk device according to a first embodiment of the present invention. 
     FIG. 5 is a three-dimensional representation of a disk device according to a first embodiment of the present invention excluding internal components. 
     FIG. 6 is a lateral view of a disk device according to a first embodiment of the present invention seen from the gear unit side with the third sliding plate removed. 
     FIG. 7 is a component view of an intermediate member according to a first embodiment of the present invention. 
     FIG. 8 is a component view of an intermediate member according to a first embodiment of the present invention. 
     FIG. 9 is a three-dimensional representation of the insertion of a large diameter disk into a disk device according to a first embodiment of the present invention. 
     FIG. 10 is a lateral view of a disk device according to a first embodiment of the present invention. 
     FIG. 11 is a three-dimensional representation of the mechanism to prevent the protruding abutment of a carrying roller with the edge of a small diameter disk in a disk device according to a first embodiment of the present invention. 
     FIG. 12 is a three-dimensional representation of the mechanism to carry the center of a large diameter disk to a turntable according to a first embodiment of the present invention. 
     FIG. 13 is a three-dimensional representation of an arrangement which adds a member which functions when an MD is loaded in a disk device according to a first embodiment of the present invention. 
     FIG. 14 is a three-dimensional representation of an arrangement which adds a supporting and guiding member in a disk device according to a first embodiment of the present invention. 
     FIG. 15 is a three-dimensional representation of the state in which an MD is carried into a disk device according to a first embodiment of the present invention. 
     FIG. 16 is a three-dimensional representation of the state when an MD is played in a disk device according to a first embodiment of the present invention. 
     FIG. 17 is a partial lateral view of the displacement of a third sliding plate in the direction of the arrow e in a disk device according to a first embodiment of the present invention. 
     FIG. 18 is a partial lateral view of the displaced position of an intermediate member due to a third sliding plate (not shown) in the direction of the arrow e in a disk device according to a first embodiment of the present invention. 
     FIG. 19 is a partial lateral view of the rotated position of an intermediate member in the direction of the arrow d in a disk device according to a first embodiment of the present invention. 
     FIG. 20 is a partial lateral view of the mechanism to rotate a clamp lever in the rear direction when an MD is loaded in a disk device according to a first embodiment of the present invention. 
     FIG. 21 is a three-dimensional representation of the arrangement of the CD/MD insertion section when a CD is inserted into a disk device according to a first embodiment of the present invention. 
     FIG. 22 is a three-dimensional representation of the arrangement of the CD/MD insertion section in a disk device according to a first embodiment of the present invention. 
     FIG. 23 is a three-dimensional representation of an MD inserted into the insertion mouth of a disk device according to a first embodiment of the present invention. 
     FIG. 24 is a three-dimensional representation of an aperture of an MD holder as enlarged in a disk device according to a first embodiment of the present invention. 
     FIG. 25 is a three-dimensional representation of an MD inserted into the aperture of an MD holder enlarged in a disk device according to a first embodiment of the present invention. 
     FIG. 26 is a three-dimensional representation of an MD inserted into the aperture of an MD holder enlarged in disk device according to a first embodiment of the present invention. 
     FIG. 27 is a three-dimensional representation of an MD holder seen from the right side. 
     FIG. 28 is a lateral view of the right side of FIG.  27 . 
     FIG. 29 is a lateral view of the right side of FIG.  24 . 
     FIG. 30 is a lateral view of the right side of FIG.  25 . 
     FIG. 31 is a perspective view from the outside of a disk guiding section. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In order to explain the invention in greater detail, the preferred embodiments will be explained below with reference to the accompanying figures. Embodiment 1 
     FIG. 4 is a three-dimensional view of a disk device according to a first embodiment of the present invention. FIG. 5 is a view of the disk device in FIG. 4 excluding internal components. In the figures, reference numeral  1  denotes a small diameter disk abutting pin which abuts with the outer periphery of a small diameter disk when the inserted disk is an 8 cm CD (hereafter called a small diameter disk).  2  is a large diameter disk abutting pin which abuts with the outer periphery of a large diameter disk when the inserted disk is an 12 cm CD (hereafter called a large diameter disk). 
       3  is a lever which has a small diameter disk abutting pin  1  and a large diameter disk abutting pin  2  and which is rotatable about a supporting point  3   b  (not shown).  3   a  is an engaging piece which is arranged on one end of the lever  3 . 
       4  is a first sliding plate arranged on an engaging piece  4   a . The first sliding plate  4  is adapted to be slidable in the directions of the arrow e and E. A rack  8  is formed on the first sliding plate  4  as shown in FIG.  5  and is adapted so as to engage with a gear  9  which slides in the direction of the arrow e. A pin  5  is arranged on the first sliding plate  4  as shown in FIG.  5  and is adapted to engage with the slit  7  of the second sliding plate  6 . 
       6  is a second sliding plate which is adapted to slide in the directions of the arrow e and E. A rack  10  is formed on the second sliding plate  6  as shown in FIG.  5  and is adapted so as to engage with a gear  9  which slides in the direction of the arrow e. A pin  15 , a pin (not shown), the slit  7  above and an S-shaped elongated hole are arranged on the second sliding plate  6 . 
     The gear unit is designated by the symbol G in FIGS. 4 and 11 is a carrying roller. The carrying roller  11  is adapted to rotate bi-directionally depending on the insertion or ejection of a minidisk (hereafter MD) which is stored in a cartridge, a large diameter disk and a small diameter disk by the transmission of the rotations of a drive motor (not shown) through a gear unit G. For this purpose, a gear G 2  is fixed to one end of a shaft of the carrying roller  11 . The gear G 2  engages with a gear G 1  which is one of the gears which form the gear unit G. 
       12  is a carrying roller support lever which supports the carrying roller  11  to be rotable at both ends and which is axially supported in free rotation by the common rotation shaft of the gear G 1  which comprises the gear unit G. 
       13  is a lifting arm which rotates the carrying roller support lever  12  in the directions y and Y of the arrow and which raises the carrying roller  11  in the vertical direction. The lifting arm  13  has an L-shaped extension  13   a  which comprises a pin  14  as shown in FIG.  10  and is adapted to rotate about the shaft  13   b  in the direction of the arrows C and c. The pin  14  comprised by the extension  13   a  engages with an S-shaped elongated hole  55  on the second sliding plate as shown in FIG.  5 . 
     In FIG. 4,  17  is a clamp lever which is provided with a clamp  19  on the distal end. The clamp lever  17  is adapted to rotate about the rotation shaft  29  as shown in FIG. 5 in the direction f. An L-shaped elongated hole  32  is formed on the clamp lever  17 . 
       17   a  is a clamp lever support member which is provided with a rotating shaft  29  as shown in FIG. 5 to support the clamp lever  17  so that the clamp lever  17  is rotatable in the direction f shown in FIG.  4 . The clamp lever supporting member  17   a  is adapted to rotate in directions D and d about the rotation shaft  18  as shown in FIG. 5. A cam face  16  which engages with the pin  15  is formed on the clamp lever support member  17   a.    
       26  is a third sliding plate  16 . A rack  27  and an S-shaped elongated hole  49  are formed on the third sliding plate  26 . The third sliding plate  16  is adapted to slide in the directions e and E. 
       33  is a linked lever on which an elongated hole  38  is formed and which is adapted to rotate about a shaft  30  which acts as the center of rotation. An engaging pin  31  and an L-shaped elongated hole  32  of the clamp lever  17  are formed on the tip of the linked lever  33 . 
     FIG. 6 is a lateral view of the disk device shown in FIG. 4 with the third sliding plate  26  removed as seen from the gear unit G side. The relay member  47  is omitted from the lateral view. In the figure,  56  is a mounting plate such for a gear unit G and  59  and  60  are elongated holes. 
       48  is a pin which is arranged on the relay member  47  as shown in FIG.  8  and which engages with the S-shaped elongated hole  49 . 
       52  is an intermediate member shown in FIG. 7 on which an arc shaped elongated hole  51  and pins  57  and  58  are formed. 
     FIG. 9 is a three-dimensional figure of the insertion of a large diameter disk in a disk device according to a first embodiment of the present invention. The same or similar components to those of FIG. 4 are represented by the same numerals in FIG.  9  and their explanation will be omitted. FIG. 9 omits the third sliding plate  26  shown in FIG. 4 so as to clarify the relay member  47  which is disposed on the rear side of the third sliding plate  26 . In the figure,  200  is a large diameter disk, S is a spring which compresses the tip, on which the small diameter abutting pin  1  of the lever  3  is formed, in a clockwise direction about the supporting point  3   b.    
     FIG. 10 is a lateral view of the arrangement of a disk device according to a first embodiment of the invention. 
     FIG. 11 is a three-dimensional representation of the arrangement to prevent the carrying roller  11  from projecting and abutting with the edge of a small diameter disk by raising the peripheral section on the carrying roller abutting side of a small diameter disk, when the carrying roller  11  abuts with the rear surface of the small diameter disk and carrys the small diameter disk. In the figure,  21  is a pin which is provided on a second sliding plate  6 .  22  is a CD raising lever. A cam face  22   a  is provided on the CD raising lever  22 . The CD raising lever  22  is adapted to rotate in the directions M and m about the shaft  23  due to the abutment of the pin  21  with the cam face  22   a.    
     FIG. 12 shows a three-dimensional representation of a disk device according to a first embodiment of the invention wherein the center of a CD (large diameter disk) is carried to a turntable. 
     FIG. 13 shows a three-dimensional representation of a disk device according to a first embodiment of the invention wherein a member, which functions when an MD is loaded, is added. In FIG. 13, the same or similar components as in FIG. 4 are represented by the same numerals and their explanation will be omitted. In the figure,  24  is an MD,  24   a  is a slide cover for exposing a disk stored in a cartridge,  25  is an upper MD holder,  300  is a lower MD holder and CD disk guide (refer to FIG.  25 ),  36  is an elongated hole which is formed in the MD holder,  39  is a holder drawing lever,  34  is a shaft which acts as a center when the holder drawing lever  39  rotates,  35  is a pin which engages with an elongated hole  36 , and which is formed in proximity to the tip of the holder drawing lever  39 .  37  is a pin which engages with the elongated hole  38  and which is formed near the center of the holder drawing lever  39 .  44  is an MD holder supporting member,  63  is a bearing for supporting the holding and guiding member  61  of the MD holder  25  (FIG. 14) so as to be rotatable.  41  is a guide pin which is formed on the MD holder  25 .  45  is a pin which is provided on the lateral face of the MD holder supported member  44  and which is adapted to support the MD holder support member  44  horizontally by running on the upper horizontal face  46   b  of the cam face  46  of the second sliding plate  6 . Furthermore the MD holder support member  44  inclines the MD insertion side downwardly as shown in FIG. 16 when the pin  45  slides downwardly on the cam face  46  of the second sliding plate  6  and separates from the cam face  46 . 
       101  and  102  are CD guides which are disposed on both sides of the MD holder  25  above the carrying roller  11  and which guide the CD from its upper face.  300  is a lower MD holder and CD disk guide, the lower face of which forms a part of the CD guide. When a CD is inserted, the inserted CD is carried into the device by the carrying roller  11  due to the fact that the upper face of the disk is guided by the CD guides  101 ,  102 , and the lower MD holder and CD disk guide  300 . 
     FIG. 14 is a three-dimensional representation of a disk device according to a first embodiment of the present invention wherein a holding and guiding member  61  is added. In FIG. 14, same or similar components to those in FIG. 13 are denoted by the same numerals and their explanation will be omitted. In the figures,  42  is a guide hole which is formed on the holding and guiding member  61  and which engages with the guide pin  41  to guide the MD holder  25 .  62  is a plate shaped shaft which protrudes towards both lateral sections of the holding and guiding member  61 . The plate shaped shaft  62  engages with a bearing  63  which is formed on the MD holder supporting member  44 . 
     FIG. 15 is a three-dimensional representation of a disk device according to a first embodiment of the invention wherein an MD is carried into the device. 
     FIG. 16 is a three-dimensional representation of the state when an MD is played in a disk device according to a first embodiment of the present invention. 
     FIG. 17 is a partial lateral view of the displacement of a third sliding plate  26  in the direction of the arrow e in a disk device according to a first embodiment of the present invention. 
     FIG. 18 is a partial lateral view of the displaced position of a intermediate member  52  due to a third sliding plate  26  in the direction of the arrow e in a disk device according to a first embodiment of the present invention. 
     FIG. 19 is a partial lateral view of the rotated position of a intermediate member  52  in the direction of the arrow d in a disk device according to a first embodiment of the present invention. 
     FIG. 20 is a partial lateral view of the mechanism of rotating a clamp lever  17  in the rear direction when an MD is loaded in a disk device according to a first embodiment of the present invention. 
     FIG. 21 is a three-dimensional representation of the arrangement of the CD/MD insertion section when a CD is inserted into a disk device according to a first embodiment of the present invention. In the figure,  111  is an enlargement lever for enlarging the aperture of the MD holder  25  when an MD is inserted. 
     FIG. 22 is a three-dimensional representation of the arrangement of the CD/MD insertion section in a disk device according to a first embodiment of the present invention. In the figure,  112  is an MD insertion mouth screen which covers the MD insertion mouth of the CD/MD insertion section and prevents dust from entering. The MD insertion mouth screen which abuts with an MD which is inserted into the MD insertion mouth and rotates in the direction Q of the arrow. The MD insertion mouth screen  112  abuts with the side of the tip of the inserted MD when an MD is inserted into the CD/MD insertion section. However it is adapted not to abut with an inserted CD. 
     FIG. 23 is a three-dimensional representation of an MD  24  inserted into the MD insertion mouth. 
     FIG. 24 is a three-dimensional representation of a MD insertion mouth screen  112  abutting with an inserted MD from the MD insertion mouth and rotating in the direction Q of the arrow with the aperture of the MD holder  25  enlarged. As shown in the figure, a pin  112   a  is provided on one side face of the MD insertion mouth screen  112 . The MD insertion mouth screen  112  abuts with the side of the tip of the MD  24  which has been inserted from the MD insertion mouth. The pin  112   a  of the MD insertion mouth screen  112  which has rotated in the direction Q of the arrow raises one end of the enlargement lever  111  upwardly. As a result, the other end of the enlargement lever  111  rotates about the shaft  111   a  and abuts with the projection  25   b  of the MD holder aperture member  25   a  which is displaced on the lower side of the MD holder  25  which comprises the aperture of the MD holder  25 . The MD holder aperture member  25   a  opens in the direction r of the arrow and the aperture of the MD holder  25  is enlarged thus facilitating the insertion of an MD into the aperture of the MD holder  25 . 
     FIG.  25  and FIG. 26 are three-dimensional representations of an MD  24  inserted into the aperture of an MD holder  25  enlarged in this way. FIG. 27 shows a three-dimensional representation of the holder section seen from the right.  302  is a spring which compresses the lower MD holder and CD disk guide in direction X and Y.  301  is an enlarging and rotating central shaft of the lower MD holder and CD disk guide  300  which tensions the spring  302  and which is disposed on the upper MD holder  25 . FIG. 28 is a lateral view of the right side of FIG.  27 . FIG. 29 is a lateral view of the right side of FIG.  24  and shows the rotation of the lower MD holder and CD disk guide  300 . FIG. 30 is a lateral view of the right side of FIG.  25  and shows the enlargement of the lower MD holder and CD disk guide  300 . FIG. 31 shows the disk guide section which is comprised by the CD guides  101 ,  102   d  and the lower MD holder and CD disk guide  300 . 
     On the basis of the above discussion, the CD carrying mechanism in the scope of the claims corresponds to the carrying roller  11 , the gear unit G and the like. The clamp mechanism corresponds to the small diameter disk abutting pin  1 , the large diameter disk abutting pin  2 , the lever  3 , the engaging piece  3   a ,  4   a , the first sliding plate  4 , the second sliding plate  6 , the pin  15 , the clamp lever  17 , the clamp lever support member  17   a , the clamp  19  and the like. The MD carrying mechanism corresponds to the MD holder  25 , the holder drawing lever  39 , the linked lever  33 , the guide pin  41 , the guide hole  42 , the holding and guiding member  61  and the like. The clamp lever avoiding mechanism corresponds to the clamp lever  17 , the linked lever  33 , the holder drawing lever  39  and the like. The MD holder aperture enlargement mechanism corresponds to the enlargement lever  111 , the projection  25   b  and the like. 
     The operation of the invention will be explained below. 
     (CD Loading Operation) 
     When a CD is inserted into the disk device, a sensor (not shown) detects that a CD has been inserted. As a result, a drive motor (not shown) is activated to drive a gear unit G and rotate the carrying roller  11  to the right. 
     The disk which is gripped by the disk guides  101 ,  102 ,  300  and the rotations of the carrying roller  11  is carried further into the disk device by the rotations of the carrying roller  11 . 
     When a small diameter CD is inserted, the outer periphery of the small diameter disk abuts with the small disk abutment pin  1 . When a large diameter CD is inserted, the outer periphery of the large diameter disk abuts with the large disk abutment pin  2 . 
     The CD is carried further into the device by the carrying roller  11  as its outer periphery is in abutment with the small disk abutment pin  1  or the large disk abutment pin  2  and so the center of the CD  200  arrives at the center of the turntable. As a result, as shown in FIG. 9, the lever  3  is rotated in the direction a of the arrow about the supporting point  3   b  by the inserted CD  200 . 
     When the lever  3  is rotated in the direction a, the engaging piece  3   a  displaces in the direction e of the arrow to abut with the engaging piece  4   a  of the first sliding plate  4  and thus further slide the first sliding plate  4  in the direction e of the arrow. 
     As a result, as shown in FIG. 5, the rack  8  formed on the first sliding plate  4  engages with the gear  9  and the first sliding plate  4  further slides in the direction e of the arrow due to the gear  9  which is rotating in a left direction. 
     When the first sliding plate  4  slides in the direction e of the arrow, the pin  5 , which is shown in FIG. 5 as formed on the first sliding plate  4 , abuts with the end of the slit  7  formed on the second sliding plate  6  and slides the second sliding plate  6  in the direction e of the arrow. 
     As a result, the rack  10  formed on the second sliding plate  6  engages with the gear  9  and the gear  9  slides the first sliding plate  4  and the second sliding plate  6  in the direction e of the arrow. 
     When the second sliding plate  6  slides in the direction e of the arrow, it engages with the S-shaped elongated hole  55  which is formed on the second sliding plate  6 . The pin  14  which is formed on an extension  13   a  of the lifting arm  13  shown in FIG. 10 slides towards the upper end of the S-shaped elongated hole  55  as shown in FIG.  11 . As a result, the lifting arm  13  as shown in FIG. 10 rotates in the other direction C about the shaft  13   b  and the carrying roller support lever  12  rotates in the direction Y of the arrow. Thus the carrying roller  11  is depressed as shown in FIG.  11 . 
     On the other hand, since the pin  15  which is formed on the second sliding plate  6  is displaced in the direction e of the arrow as the second sliding plate slides in direction e, the pin  15 , which was abutting with the cam face  16  formed on the clamp lever supporting member  17   a  as shown in FIG. 5, slides on the cam face  16  and becomes separated from the cam face  16  as shown in FIG.  11 . 
     As a result, the clamp lever supporting member  17   a  and the clamp lever  17  rotate in the direction D of the arrow as shown in FIG.  9  and the clamp lever  19  which is formed on the tip of the clamp lever  17  clamps the CD  200  on the turntable from above as shown in FIG.  12 . 
     (CD Ejection Operation) 
     During the CD ejection operation, the drive motor rotates in the opposite direction to that of CD loading. As a result, the gear  9  rotates to the right as shown in FIG.  11  and the first sliding plate  4  and the second sliding plate  6  slide in the direction E of the arrow. 
     When the second sliding plate  6  slides in the direction E of the arrow, the pin  15  which is formed on the second sliding plate  6  abuts with the cam face  16  on the clamp lever supporting member  17   a . The clamp supporting lever  17   a  is rotated in the direction D of the arrow about the rotation shaft  18  and as shown in FIG. 5, the gripping of the CD  200  by the clamp  19  and the turntable is released. Thus the relation of the clamp lever  17  and the CD  200  is as shown in FIG.  9 . 
     The pin  14  which engages with the S-shaped elongated hole  55  slides the S-shaped elongated hole  55  from the position shown in FIG.  11  and displaces towards the lower end of the S-shaped elongated hole  55  due to the displacement of the second sliding plate  6  in direction E. As a result, the lifting arm  13  rotates in direction c as shown in FIG.  10  and the carrying roller  11  rises and abuts with the rear face of the CD  200 . Thus the carrying roller supporting arm  12  and the carrying roller  11  are in the position as shown in FIG.  5 . 
     The CD  200  is gripped at this time by the disk guides  101 ,  102 ,  300  and the rotating carrying roller  11  because the carrying roller  11  is rotating to the left due to the drive motor through the gear unit G. Thus the CD  200  is ejected outside the device. 
     When the rack  8  of the first sliding plate  4  and the rack  10  of the second sliding plate  6  separate, the first sliding plate  4  and the second sliding plate  6  displace in the direction E due to a spring (not shown) and the first sliding plate  4  and the second sliding plate  6  return to an initial position as shown in FIG.  5 . 
     When the CD is ejected as above, both large and small diameter disks are treated in a similar fashion. However since the rising carrying roller  11  may protrude and abut with the edge of small disks, the lever  22  is rotated the direction M about the shaft  23  and the peripheral section of the small disk near the carrying roller is raised upwardly by the action of the pin  21 , which is provided on the second sliding plate  6  shown in FIG. 11, on the cam face  22   a . The action of the pin  21  is due to the displacement of the second sliding plate  6  in direction E. Thus the carrying roller  11  is prevented from coming into contact with the edge of the small diameter disk. 
     (MD Loading Operation) 
     When an MD  24  is inserted into the MD insertion mouth in the CD/MD insertion section, as shown in FIG. 24, the side of the tip of the inserted MD  24  abuts with the MD insertion mouth screen  112 . As a result, the MD insertion mouth screen  112  rotates in the direction Q and an end of the enlargement lever  111  is raised upwards. Since the other end of the enlargement lever  111  rotates about the shaft  111   a  and depresses the projection  25   b  downwards. The lower MD holder and CD disk guide  300  is opened in the direction r (the direction X in FIGS. 27 and 28) and the aperture of the MD holder  25  is rotated. When the MD  24  is pushed further, the MD  24  enlarges the lower MD holder  300  in the direction y of FIG.  28 . Thus the MD  24  is in a completely inserted state as shown in FIG.  30 . This state is shown in FIG.  13 . 
     When the MD  24  is inserted into the MD holder  25 , a sensor (not shown) detects the insertion and operates a motor (not shown) to drive a gear unit G. As a result, the third sliding plate  26  is displaced in the direction e as shown in FIG. 17 by a member (not shown). The rack  27  formed on the third sliding plate  26  engages with the gear.  28  as shown in FIG.  13 . Thereafter the third sliding plate  26  displaces in the direction e due to the rotations of the gear  28 . Since the pin  48  on the relay member  47  is engaged with the S-shaped elongated hole  49 , it rotates in the direction j as shown by FIG.  18  and the intermediate member  52 , which has an arc shaped elongated hole  51  with which the pin  50  of the relay member  47  engages, displaces in the same direction as the third sliding plate  26 . At this time, the intermediate member  52  displaces while rotating in the direction d as shown in FIGS. 17,  18 , and  19 . 
     The engaging piece  43  of the third sliding plate  26  abuts with the engaging piece  3   a  of the lever  3  due to the displacement of the third sliding plate  26  in the direction e. The engaging piece  4   a  of the first sliding plate  4  is pushed through the engaging piece  3   a  and the first sliding plate  4  displaces in the direction e. As a result, the movement of the first and second sliding plates  4 ,  6  is the same as the action of storing a CD as explained above. 
     The pin  53  which is formed on the clamp lever  17  as shown in FIG. 20 abuts with the end of the slit  54  of the intermediate member  52  together with the displacement of the third sliding plate  6  in direction e. The clamp lever  17  rotates about the rotation shaft  29  in direction f and displaces in a rear direction which does not impede the storage of the MD  24 . 
     The linked lever  33  displaces in direction g and rotates about the shaft  30  due to the rear displacement of the clamp lever  17 . Together with this displacement, the holder drawing lever  39  rotates in the direction h about the shaft  34 . The MD holder  25 , on which is formed an elongated hole  36  which engages with the pin  35  on the tip of the holder drawing lever  39  as shown in FIG. 15, is drawn into the device. 
     The MD holder  25  is drawn into the device without any positional divergence due to the guide pin  41  and the guide hole  42  as shown in FIG.  14 . 
     The MD  24  opens a slide screen  24   a  as a result of a member which is not shown during the process of being drawn into the device and arrives at a fixed position in the device. 
     The pin  45  which is provided on the lateral face of the MD holder support member  44  slides the cam face  46  which is formed on the second sliding plate  6  downwardly due to the displacement of the second sliding plate  6  together with the motion of the second sliding plate  6  in the direction e. As a result, the MD holder supporting member  44  inclines the MD insertion in the direction i as shown in FIG.  16 . The MD  24  is placed on the turntable. 
     Since the plate shaped shaft  62  which projects towards both sides of the holding and guiding member  61  is engaged to rotate with respect to the bearing  63  which is formed on the MD holder supporting member  44  as shown in FIG. 14, the holding and guiding member  61  can achieve a horizontal position even if the MD holder supporting member  44  inclines in the direction i. As a result, it is possible to place the MD  24  held by the MD holder  25  horizontally on the turntable. 
     When the MD  24  is loaded onto the turntable as shown in FIG. 24, the carrying roller  11  is depressed for the same reasons as explained above in connection with the storage of a CD. 
     (MD Ejection Operation) 
     When an MD  24  is taken from a position as loaded on a turntable and ejected out of the device, a drive motor (not shown) rotates in the opposite direction to that when an MD is loaded. As a result, the first and second sliding plates  4 ,  6  displace in direction E. The third sliding plate  26  displaces in the direction E from the position in FIG. 16 to that shown in FIG.  15 . The clamp lever  17  rotates back to an initial position. Together with the action of the clamp lever  17 , the linked lever  33  and the holder drawing lever  39  rotate in the direction of the carrying roller  11 . The MD  24  is supported on the MD holder  25  as shown in FIG.  14  and the MD  24  is placed in a position in which it can be ejected outside the device as the MD insertion mouth screen  112  from the MD insertion mouth in the CD/MD insertion mouth is opened in the direction q shown in FIG.  23 . 
     As shown above, according to embodiment 1, a drive motor is driven and thus enables a disk device to load and eject an MD which is a type of disk stored in a cartridge, a small diameter disk and a large diameter disk with high reliability. 
     According to embodiment 1, the invention is adapted to dispose CD guides  101 ,  102  on both sides of an MD holder  25  and thus reduce the width of the device. 
     Furthermore according to embodiment 1, when an MD is inserted from an MD insertion mouth, the aperture of a MD holder  25  is expanded. Thus it is easy to store an MD in the MD holder  25  and as a result, user-friendliness is enhanced. 
     As shown above, a disk device according to the present invention is adapted for use as a disk device in a vehicle which can use MD disks which are disks stored in a cartridge and disks of varying sizes.