Claims
- 1. .[.In a.]. .Iadd.A .Iaddend.magneto optical recording and/or reproducing apparatus for performing recording and/or reproducing operations with respect to a magneto optical disc contained in a disc cartridge, .[.having.]. .Iadd.which comprises: .Iaddend.
- a holder for accommodating the disc cartridge,
- a bias magnet secured to the holder in opposition to .[.one.]. .Iadd.a first .Iaddend.side of the disc in the disc cartridge in a full-loaded .Iadd.cartridge .Iaddend.position in the holder,
- a base .[.for mounting.]. .Iadd.having mounted .Iaddend.thereon an optical head in opposition to .[.the other side of.]. .Iadd.the bias magnet across .Iaddend.the disc in the full-loaded .[.disc.]. cartridge.[., and.]. .Iadd.position and having .Iaddend.a spindle motor .[.for rotating.]. .Iadd.rotatably engaging .Iaddend.the disc in the full-loaded .[.disc.]. cartridge .[.and.]. .Iadd.position, .Iaddend.
- a shift mechanism .[.for relatively shifting the base with respect to the disc cartridge to make operative the optical head and the spindle motor along with insertion of the disc cartridge into the holder,.]. .Iadd.disposed between the base and the holder and operably shifting said base with respect to said holder between an entry orientation maximizing a distance from the bias magnet to the optical head with the disc cartridge in a unloaded cartridge position outside said holder, and an operate orientation minimizing a distance from the bias magnet to the optical head when the disc cartridge is in the full-loaded cartridge position, and .Iaddend.
- a cartridge shutter actuating device for opening a laterally slidable shutter of the disc cartridge along with insertion thereof into .[.the.]. .Iadd.said .Iaddend.holder in a direction substantially perpendicular to the sliding direction of the cartridge shutter, .[.which comprises:
- at least one arm member rotatable about a pivot provided at one end thereof and having first and second engaging elements substantially at the other end thereof and having first and second engaging elements substantially at the other end thereof, said first engaging element being engageable with a corresponding abutment formed in the cartridge shutter during insertion of the disc cartridge into said holder;
- first guide means extending in an oblique direction between the cartridge inserting direction and the shutter sliding direction for guiding therealong said second engaging element to thereby rotate said arm member about said pivot;
- supporting means for movably supporting said pivot of said arm member in the cartridge inserting direction; and
- spring means for biasing said arm member toward a direction opposite to the cartridge inserting direction;
- said second engaging portion being guided by said first guide means to rotate said arm member up to a certain rotational angle about said pivot to thereby open the cartridge shutter due to engagement between said first engaging element and said abutment of the cartridge shutter, during insertion of the disc cartridge into said holder from an unloaded position to a half-loaded position, and during succeeding insertion from the half-loaded position to a full-loaded position, said pivot being supported by said supporting means to move in the cartridge inserting direction said with certain rotational angle of said second engaging element being unchanged.].
- .Iadd.said cartridge shutter actuating device having means for opening the cartridge shutter during insertion of the disc cartridge from the unloaded cartridge position wherein the shutter is in a closed shutter position to a half-loaded cartridge position with a leading edge proximate to said bias magnet and with the shutter in a fully opened shutter position completely exposing an opening in the cartridge in a half-loaded cartridge position, and means for maintaining the cartridge shutter in the fully opened shutter position during succeeding insertion of the disc cartridge from the half-loaded cartridge position to the full-loaded cartridge position.Iaddend.. .[.
- 2. The apparatus according to claim 1 wherein said supporting means comprises a sliding member guided along a second guide means extending substantially in the cartridge inserting direction along the side periphery of said holder..]..[.3. The apparatus according to claim 2 wherein said first guide means comprises a bowstring edge of a crescent-shaped slot having an arc substantially corresponding to an arc described by said second engaging element when said arm member is rotating about said pivot supported by said sliding member positioned in one extreme end of said second guide means..]..[.4. The apparatus according to claim 3 wherein said crescent-shaped slot further extends in the cartridge inserting direction to form a rectilinear slot portion for allowing said second engaging element to move therealong during the succeeding insertion of the disc cartridge from the half-loaded position to the full-loaded position..]..[.5. The apparatus according to claim 2 wherein said sliding member is provided at both ends thereof guide rollers rotatably fitted into said second guide means..]..[.6. In a magneto optical recording and/or reproducing apparatus for performing recording and/or reproducing operation with respect to a magneto optical disc contained in a disc cartridge, having a main chassis, a holder fixedly connected to the main chassis for accommodating the disc to one side of the disc in the disc cartridge in a full-loaded position in the holder, a base connected to the main chassis for mounting thereon an optical head in opposition to the other side of the disc in the full-loaded disc cartridge and a spindle motor for rotating the disc in the full-loaded disc cartridge, and a shift mechanism for relatively shifting the base with respect to the disc cartridge to make operative the optical head and the spindle motor along with insertion of the disc cartridge into the holder,
- a cartridge shutter actuating device mounted to said holder for opening a laterally slidable shutter of the disc cartridge along with insertion thereof into the holder in a direction substantially perpendicular to the sliding direction of the cartridge shutter, which comprises:
- at least one arm member rotatable about a pivot provided at one end thereof and having first and second engaging elements substantially at the other end thereof, said first engaging element being engageable with a corresponding abutment formed in the cartridge shutter during insertion of the disc cartridge into said holder;
- first guide means extending in an oblique direction between the cartridge inserting direction and the shutter sliding direction for guiding therealong said second engaging element to thereby rotate said arm member about said pivot;
- supporting means for movably supporting said pivot of said arm member in the cartridge inserting direction; and
- spring means for biasing said arm member toward a direction opposite to the cartridge inserting direction;
- said second engaging element being guided by said first guide means to rotate said arm member up to a certain rotational angle about said pivot to thereby open the cartridge shutter due to engagement between said first engaging element and said abutment of the cartridge shutter, during insertion of the disc cartridge into said hold from an unloaded position to a half-loaded position, and during succeeding insertion from the half-loaded position to a full-loaded position, said pivot being supported by said supporting means to move in the cartridge inserting direction with said certain rotational angle of said second engaging element being
- unchanged..]..[.7. The apparatus according to claim 6 wherein said supporting means comprises a sliding member guided along a second guide means extending substantially in the cartridge inserting direction along the side periphery of said holder..]..[.8. The apparatus according to claim 7 wherein said first guide means comprises a bowstring edge of a crescent-shaped slot having an arc substantially corresponding to an arc described by said second engaging element when said arm member is rotating about said pivot supported by said sliding member positioned in one extreme end of said second guide means..]..[.9. The apparatus according to claim 8 wherein said crescent-shaped slot further extends in the cartridge inserting direction to form a rectilinear slot portion for allowing said second engaging element to move therealong during the succeeding insertion of the disc cartridge form the half-loaded position to the full-loaded position..]..[.10. The apparatus according to claim 6 wherein said sliding member is provided at both ends thereof guide rollers rotatably fitted into said second guide means..]..[.11. In a magneto optical recording and/or reproducing apparatus for performing recording and/or reproducing operation with respect to a magneto optical disc contained in a disc cartridge, having a holder for accommodating the disc cartridge, a bias magnet secured to the holder in opposition to one side of the disc in the disc cartridge in a full-loaded position in the holder, a base for mounting thereon an optical head in opposition to the other side of the disc in the full-loaded disc cartridge and a spindle motor for rotating the disc in the full-loaded disc cartridge, and shift mechanism for relatively shifting the base with respect to the disc cartridge to make operative the optical head and the spindle motor along with insertion of the disc cartridge into the holder,
- a cartridge shutter actuating device mounted to said holder for opening a laterally slidable shutter of the disc cartridge along with insertion thereof into the holder in a direction substantially perpendicular to the sliding direction of the cartridge shutter, which comprises:
- at least one arm member rotatable about a pivot provided at one end thereof and having first and second engaging elements substantially at the other end thereof, said first engaging element being engageable with a corresponding abutment formed in the cartridge shutter during insertion of the disc cartridge into said holder, said pivot being movable in the cartridge inserting direction;
- first guide means extending in an oblique direction between the cartridge inserting direction and the shutter sliding direction for guiding therealong said second engaging element to thereby rotate said arm member about said pivot; and
- spring means for biasing said arm member toward a direction opposite to the cartridge inserting direction;
- said second engaging element being guided by said first guide means to rotate said arm member up to a certain rotational angle about said pivot to thereby open the cartridge shutter during to engagement between said first engaging element and said abutment of the cartridge shutter, during insertion of the disc cartridge into said holder from an unloaded position to a half-loaded position, and during succeeding insertion from the half-loaded position to a full-loaded position, said pivot being moved in the cartridge inserting direction with said certain rotational angle of said second engaging element being unchanged..]..[.12. The apparatus according to claim 11 wherein said first guide means comprises a bowstring edge of a crescent-shaped slot having an arc substantially corresponding to an arc described by said second engaging element when said arm member is rotating about said pivot supported by said sliding member positioned in one extreme end of said second guide means..]..[.13. The apparatus according to claim 12 wherein said crescent-shaped slot further extends in the cartridge inserting direction to form a rectilinear slot portion of allowing said second engaging element to move therealong during the succeeding insertion of the disc cartridge from the half-loaded position
- to the full-loaded position..]..Iadd.14. The apparatus according to claim 1 wherein said means for opening the cartridge shutter comprises:
- at least one arm member rotatable about a pivot provided at one end thereof and having first and second engagement elements substantially at the other end thereof, said first engaging element being engageable with a corresponding abutment formed in the cartridge shutter during insertion of the disc cartridge into said holder; and
- first guide means extending in an oblique direction between the cartridge inserting direction and the shutter sliding direction for guiding therealong said second engaging element to thereby rotate said arm member about said pivot;
- said second engaging element being guided by said first guide means to rotate said arm member up to a certain rotational angle about said pivot to thereby open the cartridge shutter due to engagement between said first engaging element and said abutment of the cartridge shutter, during insertion of the disc cartridge into said holder from said unloaded cartridge position to said half-loaded cartridge position;
- and wherein said means for maintaining the cartridge shutter comprises:
- supporting means for movable supporting said pivot of said arm member in the cartridge inserting direction, said pivot being supported by said supporting means to more in the cartridge inserting direction with said certain rotational angle of said second engaging element being unchanged, during insert of the disc cartridge from the said half-loaded cartridge position to said full-loaded cartridge position..Iaddend..Iadd.15. The apparatus according to claim 14 wherein said supporting means comprises a sliding member guided along a second guide means extending substantially in the cartridge inserting direction along the side periphery of said holder..Iaddend..Iadd.16. The apparatus according to claim 15 wherein said first guide means comprises a bowstring edge of a crescent-shaped slot having an arc substantially corresponding to an arc described by said second engaging element when said arm member is rotating about said pivot supported by said sliding member positioned in one extreme end of said second guide means..Iaddend..Iadd.17. The apparatus according to claim 16 wherein said crescent-shaped slot further extends in the cartridge inserting direction to form a rectilinear slot portion for allowing said second engaging element to move therealong during the succeeding insertion of the disc cartridge from the half-loaded cartridge position to the full-loaded position..Iaddend..Iadd.18. The apparatus according to claim 1, wherein said bias magnet is secured to said holder at a level higher by approximately 1 mm than said one side of the said disc when said disc cartridge is loaded in said full-loaded cartridge position..Iaddend..Iadd.19. The apparatus according to claim 1, wherein said bias magnet comprises an E-shaped core and a coil coiled around said
- E-shaped core..Iaddend..Iadd.20. A magneto optical recording and/or reproducing apparatus for performing recording and/or reproducing operation with respect to a magneto optical disc contained in a disc cartridge, which comprises:
- a holder for accommodating the disc cartridge,
- a bias magnet secured to the holder in opposition to a first side of the disc in the disc cartridge in a full-loaded cartridge position in the holder,
- an optical head in opposition to a second side of the disc across the disc from the bias magnetic in the full-loaded cartridge position,
- a spindle motor on the second side of the disc having a turntable to rotate the disc in the full-loaded cartridge position,
- a shift mechanism connected to the turn table and the optical head and operably shifting said optical head and said turntable to operating orientation in response to insertion of the disc cartridge into the holder,
- a cartridge shutter actuating device mounted to the holder for opening a laterally slidable shutter of the disc cartridge in connection with insertion thereof into the holder from a closed shutter position to a fully opened shutter position completely exposing an opening in the cartridge in a half loaded cartridge position with a leading edge of the cartridge being proximate to said bias magnet, and means for maintaining the cartridge shutter in the fully opened shutter position during succeeding insertion of the disc cartridge from the half-loaded cartridge
- position to the full-loaded cartridge position..Iaddend..Iadd.21. The apparatus according to claim 20, wherein said bias magnet is secured to said holder at a level higher by approximately 1 mm than said one side of the said disc when said disc cartridge is loaded in said full-loaded
- cartridge position..Iaddend..Iadd.22. The apparatus according to claim 20, wherein said bias magnet comprises an E-shaped core and a coil coiled around said E-shaped core..Iaddend..Iadd.23. A magneto optical recording and/or reproducing apparatus for performing recording and/or reproducing operations with respect to a magneto optical disc contained in a disc cartridge, which comprises:
- a holder for accommodating the disc cartridge,
- a bias magnet mounted fixedly with respect to said holder in opposition to a first side of the disc in the disc cartridge in a full-loaded cartridge position in said holder, said bias magnet defining a half-loaded cartridge position of the disc cartridge at a point in the direction of insertion of the disc cartridge where a front edge of the disc cartridge is proximate to but has not yet reached said bias magnet, .Iaddend.
- an optical head mounted in opposition to a second side of the disc in the full-loaded for disc cartridge and positioned for recording and/or reproducing the disc in the full-loaded disc cartridge, and
- a cartridge shutter actuating device mounted to the holder and opening a laterally slidable shutter of the disc cartridge in connection with insertion thereof into said holder from a closed shutter position in an unloaded cartridge position wherein the cartridge is outside the holder to a fully opened shutter position completely exposing an opening in the cartridge in the half-loaded cartridge position.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-276778 |
Oct 1987 |
JPX |
|
Parent Case Info
This is a continuation of copending application(s) Ser. No. 07/265,212, now U.S. Pat. No. 4,899,238 filed on 10/31/88.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
62-22265 |
Jan 1987 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
265212 |
Oct 1988 |
|
Reissues (1)
|
Number |
Date |
Country |
Parent |
450247 |
Dec 1989 |
|