1. An optical pickup comprising:
a laser light source;
an objective lens focusing a light beam emitted from said laser light source;
a lens holder having said objective lens, a focus coil and a tracking coil;
magnets driving said focus coil and the tracking coil;
a magnet fixing member fixing said magnets;
a unit base supporting said lens holder; and
a casing holding said unit base,
wherein one end of an elastic member is connected to said unit base, and the other end of said elastic member is connected to said magnet fixing member at point symmetrical positions on the basis of a center of said objective lens.
2. An optical pickup as claimed in claim 1, wherein said magnet, and the focus coil or the tracking coil provided in said lens holder are arranged at substantially point symmetrical positions on the basis of the center of said objective lens so as to face to the other magnet, and the focus coil or the tracking coil, and a connecting position between a suspension supporting said lens holder and said lens holder is arranged at substantially point symmetrical positions on the basis of the center line of said focus coil or the tracking coil facing to each other.
3. An optical disc apparatus comprising:
the optical pickup as claimed in claim 1;
an optical pickup feeding mechanism moving said pickup in a radial direction of said disc-like recording medium;
a disc motor for attaching said disc-like recording medium thereto and rotating said disc-like medium;
a chassis mounting said optical pickup, said optical pickup feeding mechanism and said disc motor; and
an electric circuit having a signal processing system and a control system.
4. An optical disc apparatus comprising:
the optical pickup as claimed in claim 2;
an optical pickup feeding mechanism moving said pickup in a radial direction of said disc-like recording medium;
a disc motor for attaching said disc-like recording medium thereto and rotating said disc-like medium;
a chassis mounting said optical pickup, said optical pickup feeding mechanism and said disc motor; and
an electric circuit having a signal processing system and a control system.
5. An optical pickup comprising:
a laser light source;
an objective lens focusing a light beam emitted from said laser light source on an information recording medium;
a lens holder having said objective lens, a focus coil and a tracking coil;
magnets driving said focus coil and the tracking coil;
a magnet fixing member fixing said magnets;
a unit base supporting said lens holder;
a casing holding said unit base; and
the optical pickup being used in an optical disc apparatus,
wherein one end of an elastic member is connected to said unit base, and the other end of said elastic member is connected to said magnet fixing member at an opposite position to ore end of said elastic member with respect to an axis passing through a center of rotation of said information recording medium and an optical axis of said objective lens.
6. An optical pickup as claimed in claim 5, wherein said magnet, and the focus coil and the tracking coil provided in said lama holder are arranged at line symmetrical positions with respect to the axis passing through the center of rotation of said information recording medium and the optical axis of said objective lens, and a connecting position between a suspension supporting said lens holder and said lens holder is arranged on said axis.
7. An optical disc apparatus comprising:
the optical pickup as claimed in claim 5;
an optical pickup feeding mechanism moving said pickup in a radial direction of said disc-like recording medium;
a disc motor for attaching said disc-like recording medium thereto and rotating said disc-like medium;
a chassis mounting said optical pickup, said optical pickup feeding mechanism and said disc motor; and
an electric circuit having a signal processing system and a control system.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An input device, comprising:
a substrate;
a mouse unit provided on the substrate;
a keyboard unit, provided on the substrate;
a switch unit, wherein the switch unit is configured for activating the mouse unit or the keyboard unit.
2. The input device as claimed in claim 1, further comprising a cover to cover the keyboard unit when the keyboard unit is not in use; the switch unit being mounted on a lateral side of the substrate.
3. The input device as claimed in claim 2, wherein a top of the cover is formed as a curved shape.
4. The input device as claimed in claim 2, wherein the keyboard unit comprises several main keys, each main key is configured for outputting several key values displayed in rows on the surface of the main key.
5. The input device as claimed in claim 4, wherein the keyboard unit further comprises several selection keys for selecting the key values of the main keys.
6. The input device as claimed in claim 4, wherein the keyboard unit further comprises a right row selection key for selecting the right side of key values distributed in each row.
7. The input device as claimed in claim 1, wherein the keyboard unit and the mouse unit are connected to a transmission line.
8. The input device as claimed in claim 1, wherein the switch unit is a single pole double throw switch comprising a first contact, a second contact and a third contact, wherein the third contact is connected to a power supply, the first contact is connected to the mouse unit, and the second contact is connected to the keyboard unit.
9. An input device, comprising:
a keyboard unit;
a keyboard electrically connected to the keyboard unit, which comprising several keys;
a key element electrically connected to the keyboard and the keyboard unit, which comprising circuits activating by different key values;
a processor electrically connected to the key element, the keyboard and the key element, saving a character table corresponding to the key values of the key element;
an interface circuit electrically connected to the processor;
wherein when a key or a combination of keys on the keyboard is activated, the circuit of the key element corresponding to the key or the combination of keys is closed; when the processor detects the closed state of the circuit, the key value corresponding to the key or the combination of keys is confirmed in the character table by the processor, and the confirmed key value is transmitted to a computer through the interface circuit.