Optical pickup with a compact design

A mechanism for adjusting inclination of an objective lens for use in an optical pickup including an objective-lens driving device having an objective lens and a yoke, and an optical system for transmitting and receiving light to and from said objective lens, said mechanism comprising:

• a movable plate which is formed integrally with said yoke, said yoke having a substantially U-shaped cross section, on which said objective-lens driving device is mounted;
• a base having a through hole formed therein, on which said movable plate and said optical system are mounted to accommodate a part of a bottom portion of said U-shaped yoke in said through hole;
• a contacting portion between said movable plate and said base, said contacting portion forming an inclining fulcrum for inclining said objective lens relative to said base, said contacting portion forming said inclining fulcrum being located between a bottom and a top of the objective-lens driving device;
• and
• height adjusting means for inclining said objective-lens driving device about said inclining fulcrum.

An optical disk apparatus comprising:

• an objective-lens driving device having an objective lens;
• an optical system for transmitting and receiving light to and from said objective lens, said objective-lens driving device being mounted on a mounting base of said optical system;
• a yoke and at least one permanent magnet, said yoke and at least one permanent magnet constituting a magnetic circuit;
• a mechanism for adjusting inclination of an objective lens, including
• a through hole portion formed in said mounting base of said optical system,
• a bottom of said objective-lens driving device accommodated in said through hole portion,
• an inclining fulcrum for inclining said objective lens, and
• height adjusting means for inclining said objective-lens driving device about said inclining fulcrum,
• wherein a magnetic circuit of said objective-lens driving device is disposed within a window area of a lower shell of an optical disk, and a portion of an objective lens holder which opposes a side edge of said window in said lower shell is formed into an inclined surface.

An optical disk apparatus comprising:

• an objective-lens driving device having an objective lens and a yoke;
• an optical system for transmitting and receiving light to and from said objective lens, said objective-lens driving device being mounted on a mounting base of said optical system,
• a mechanism for adjusting inclination of an objective lens, including
• a movable plate formed integrally with said yoke, said yoke having a substantially U-shaped cross section,
• a through hole portion formed in said mounting base of said optical system, wherein a lower portion of said yoke is accommodated in said through hole portion,
• an inclining fulcrum for inclining said objective lens, and
• height adjusting means for inclining said objective-lens driving device about said inclining fulcrum,
• wherein a magnetic circuit of said objective-lens driving device is disposed within a window area of a lower shell of an optical disk, and a portion of an objective lens holder which opposes a side edge of said window in said lower shell is formed into an inclined surface.

A mechanism for adjusting inclination of an objective lens for use in an optical pickup including an objective-lens driving device having an objective lens and at least one permanent magnet which constitutes at least part of a magnetic circuit, and an optical system for transmitting and receiving light to and from said objective lens, said mechanism comprising:

• a base having a through hole formed therein, on which said objective-lens driving device and said optical system are mounted to accommodate at least a part of said magnetic circuit in said through hole;
• a contacting portion between said objective-lens driving device and the base, said contacting portion forming an inclining fulcrum for inclining said objective lens relative to said base, said contacting portion forming the inclining fulcrum being located between a bottom and a top of the objective-lens driving device;
• and
• height adjusting means for inclining said objective-lens driving device about said inclining fulcrum.

A mechanism for adjusting inclination of an objective lens for use in an optical pickup including an objective-lens driving device having an objective lens and at least one permanent magnet which constitutes at least part of a magnetic circuit, and an optical system for transmitting and receiving light to and from said objective lens, said mechanism comprising:

• a base having a through hole formed therein, on which said objective-lens driving device and said optical system are mounted to accommodate at least a part of a bottom portion of said objective-lens driving device in said through hole;
• a contacting portion between said objective-lens driving device and the base, said contacting portion forming an inclining fulcrum for inclining said objective lens relative to said base, said contacting portion forming the inclining fulcrum being located between a bottom and a top of the objective-lens driving device;
• and
• height adjustment means for inclining said objective-lens driving device about said inclining fulcrum.