Claims
- 1. A position detecting sensor for detecting a position of a magnetic body comprising:
a first yoke; a first pair of magnets respectively possessing first and second poles and provided at both sides of the first yoke, the first pole of one of the first pair of magnets facing one side of the first yoke and the second pole of the other one of the first pair of magnets facing the other side of the first yoke, and the first pole of the one of the first pair of magnets being the same as the first pole of the other one of the first pair of magnets; and a magnetic detecting element located at a distant position at a substantially right angle from a center portion on a line connecting the first pair of magnets, thereby detecting a position of a magnetic body.
- 2. A position detecting sensor for detecting a position of a magnetic body comprising:
a first yoke; a first pair of magnets respectively possessing first and second poles and provided at both sides of the first yoke, the first pole of one of the first pair of magnets facing one side of the first yoke and the second pole of the other one of the first pair of magnets facing the other side of the first yoke, and the first pole of the one of the first pair of magnets being the same as the first pole of the other one of the first pair of magnets; a projected portion projected from a center portion on a line connecting the first pair of magnets and extending in a substantially right-angle direction relative to the line; a second yoke arranged facing the projected portion of the first yoke and in parallel with the line connecting the first pair of magnets; and a magnetic detecting element disposed between the projected portion of the first yoke and the second yoke, thereby detecting a position of a magnetic body.
- 3. A position detecting sensor for detecting a position of a magnetic body according to claim 2, wherein the second yoke possesses a portion of which distance is substantially the same as a distance from an end surface of the one of the first pair of magnets to an end surface of the other one of the second pair of magnets, the end surface of the one of the first pair of magnets possesses the second pole and the end surface of the other one of the first pair of magnets possesses the first pole, and the second yoke possesses a projected portion extending towards the magnetic detecting element.
- 4. A position detecting sensor for detecting a position of a magnetic body according to claim 2, wherein the second yoke is arranged in a substantially symmetrical manner relative to a longitudinal direction of the projected portion of the first yoke.
- 5. A position detecting sensor for detecting a position of a magnetic body according to claim 4, wherein the second yoke possesses a projected portion extending towards the magnetic detecting element and substantially coaxially facing the projected portion of the first yoke.
- 6. A position detecting sensor for detecting a position of a magnetic body;
a first yoke; a first pair of magnets respectively possessing first and second poles and provided at both sides of the first yoke, the first pole of one of the first pair of magnets facing one side of the first yoke and the second pole of the other one of the first pair of magnets facing the other side of the first yoke, and the first pole of the one of the first pair of magnets being the same as the first pole of the other one of the first pair of magnets; a second yoke disposed in parallel with the first yoke; a second pair of magnets respectively possessing the first and second poles and provided at both sides of the second yoke, the second pole of one of the second pair of magnets facing one side of the second yoke and the first pole of the other one of the second pair of magnets facing the other side of the second yoke; and a magnetic detecting element disposed between the first yoke and the second yoke, thereby detecting a position of a magnetic body.
- 7. A position detecting sensor for detecting a position of a magnetic body according to claim 6, wherein the first yoke possesses a projected portion extending towards the magnetic detecting element.
- 8. A position detecting sensor for detecting a position of a magnetic body according to claim 7, wherein the second yoke possesses a projected portion extending towards the magnetic detecting element.
- 9. A position detecting sensor for detecting a position of a magnetic body according to claim 8, wherein the projected portion of the first yoke substantially coaxially face the projected portion of the second yoke.
- 10. A position detecting sensor for detecting a position of a magnetic body according to claim 1, wherein the first yoke is provided with a projected portion projected from a center portion on a line connecting the first pair of magnets and extending towards the magnetic detecting element in a substantially right-angle direction relative to the line.
- 11. A position detecting sensor for detecting a position of a magnetic body according to claim 10, further comprising:
a second yoke arranged in parallel with the line connecting the first pair of magnets; and the magnetic detecting element disposed between the first yoke and the second yoke.
- 12. A position detecting sensor for detecting a position of a magnetic body according to claim 11, wherein the second yoke possesses a portion of which distance is substantially the same as a distance from an end surface of the one of the first pair of magnets to an end surface of the other one of the first pair of magnets, the end surface of the one of the first pair of magnets possesses the second pole and the end surface of the other one of the first pair of magnets possesses the first pole, and the second yoke possesses a projected portion extending towards the magnetic detecting element.
- 13. A position detecting sensor for detecting a position of a magnetic body according to claim 11, wherein the second yoke is arranged in a substantially symmetrical manner relative to the center portion on the line connecting the firs pair of magnets.
- 14. A position detecting sensor for detecting a position of a magnetic body according to claim 11, wherein the second yoke is arranged in a substantially symmetrical manner relative to a longitudinal direction of the projected portion of the first yoke.
- 15. A position detecting sensor for detecting a position of a magnetic body according to claim 13, further comprising:
a second pair of magnets respectively possessing the first and second poles and provided at both sides of the second yoke, the second pole of one of the second pair of magnets facing one side of the second yoke and the first pole of the other one of the second pair of magnets facing the other side of the second yoke.
- 16. A position detecting sensor for detecting a position of a magnetic body according to claim 15, wherein an assembled unit of the second yoke and the second pair of magnets possesses a portion of which distance is substantially the same as a distance from an end surface of the one of the first pair of magnets to an end surface of the other one of the first pair of magnet, the end surface of the one of the first pair of magnets possesses the second pole, and the end surface of the other one of the first pair of magnets possesses the first pole.
- 17. A position detecting sensor for detecting a position of a magnetic body according to claim 15, wherein an assembled unit of the second yoke and the second pair of magnets is arranged in a substantially symmetrical manner relative to the center portion on the line connecting the first pair of magnets.
- 18. A position detecting sensor for detecting a position of a magnetic body according to claim 17, wherein the first yoke is provided with a projected portion extending towards the magnetic detecting element.
- 19. A position detecting sensor for detecting a position of a magnetic body according to claim 18, wherein the second yoke is provided with a projected portion extending towards the magnetic detecting element.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2002-154367 |
May 2002 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is based on and claims priority under 35 U.S.C. §119 with respect to a Japanese Patent Application 2002-154367, filed on May 28, 2002, the entire content of which is incorporated herein by reference.