Vehicle switch
View Patent ↗A vehicle switch has a case, a movable body, a spring, a magnet, a detector, and an operating shaft. The movable body is reciprocably accommodated in the case. The spring pushes the movable body in a direction away from an internal bottom of the case. The magnet is attached to the movable body. The detector detects a magnetic flux density generated from the magnet. A lower end of the operating shaft is in contact with the movable body. The movable body has a press contact portion with which the operating shaft is in contact at a point or along a line.
1. A vehicle switch comprising:
a case having an internal bottom;
a movable body reciprocally accommodated in the case;
a magnet attached to the movable body;
a detector disposed in the case so as to face the magnet, the detector being configured to detect a magnetic flux density generated from the magnet; and
an operating shaft having a first end and a second end, the first end of the operating shaft being in contact with the movable body; and
a spring disposed to push the movable body in a direction away from the internal bottom of the case and into contact with the first end of the operating shaft;
wherein the movable body has a press contact portion with which the first end of the operating shaft is in contact only at a point or only along a line such that the contact between the press contact portion and the first end of the operating shaft constitutes a point contact or a line contact; and
wherein the movable body further has a pair of holding portions disposed at outer sides of the press contact portion, each of the holding portions having, at an outer end thereof, a guide portion movably engaged with the case to guide reciprocal movement of the movable body in the case.
2. The vehicle switch according to claim 1 , wherein
at least one of the first end of the operating shaft and the press contact portion of the movable body has a spherical surface; and
the first end of the operating shaft is in contact with the contact portion of the movable body at the spherical surface.
3. The vehicle switch according to claim 2 , wherein
the movable body has opposite first and second ends, the first end of the movable body facing the first end of the operating shaft, and the second end of the movable body facing towards the internal bottom of the case; and
the press contact portion of the movable body, at which the operating shaft contacts the movable body, is constituted by a center portion of the first end of the movable body.
4. The vehicle switch according to claim 1 , wherein
the case has an opening;
a cover is provided and covers the opening of the case, the cover having a cylindrical part;
the operating shaft is inserted through the cylindrical part of the cover, reciprocally in the cover, in a same direction as the movable body; and
the second end of the operating shaft protrudes from the cover.
5. The vehicle switch according to claim 4 , wherein
the cover further includes an attachment portion that is connected to the cylindrical part and attaches around an outer sidewall of the case.
6. The vehicle switch according to claim 1 , wherein
the movable body has opposite first and second ends, the first end of the movable body facing the first end of the operating shaft, and the second end of the movable body facing towards the internal bottom of the case; and
the press contact portion of the movable body, at which the operating shaft contacts the movable body, is constituted by a center portion of the first end of the movable body.
7. The vehicle switch according to claim 1 , wherein
the guide portions of the holding portions are respectively constituted by convex parts; and
the case has grooves formed in an internal wall thereof, and the guide portions are respectively reciprocably engaged in the grooves.
8. The vehicle switch according to claim 1 , wherein
the movable body has a vacant space defined between the holding portions; and
a support member is disposed in the case and supports the detector in the vacant space between the holding portions.
9. The vehicle switch according to claim 8 , wherein
the support member is constituted by a wiring board.
10. A vehicle switch comprising:
a case having an internal bottom;
a movable body reciprocally accommodated in the case;
a magnet attached to the movable body;
a detector disposed in the case so as to face the magnet, the detector being configured to detect a magnetic flux density generated from the magnet; and
an operating shaft having a first end and a second end, the first end of the operating shaft being in contact with the movable body; and
a spring disposed to push the movable body in a direction away from the internal bottom of the case and into contact with the first end of the operating shaft;
wherein the movable body has opposite first and second ends, the first end of the movable body facing the first end of the operating shaft, and the second end of the movable body facing towards the internal bottom of the case;
wherein the first end of the movable body has a press contact portion formed thereon, said press contact portion being in contact with the first end of the operating shaft at a point or along a line located at a center portion of the first end of the movable body; and
wherein the movable body further has a pair of holding portions disposed at outer sides of the press contact portion, each of the holding portions having, at an outer end thereof, a guide portion movably engaged with the case to guide reciprocal movement of the movable body in the case.
11. The vehicle switch according to claim 10 , wherein
at least one of the press contact portion of the movable body and the first end of the operating shaft has a spherical surface in contact with the other of the press contact portion of the movable body and the first end of the operating shaft.
12. The vehicle switch according to claim 11 , wherein
the case has an opening;
a cover is provided and covers the opening of the case, the cover having a cylindrical part;
the operating shaft is inserted through the cylindrical part of the cover, reciprocally in the cover, in a same direction as the movable body; and
the second end of the operating shaft protrudes from the cover.
13. The vehicle switch according to claim 10 , wherein
the case has an opening;
a cover is provided and covers the opening of the case, the cover having a cylindrical part;
the operating shaft is inserted through the cylindrical part of the cover, reciprocally in the cover, in a same direction as the movable body; and
the second end of the operating shaft protrudes from the cover.
14. The vehicle switch according to claim 13 , wherein
the cover further includes an attachment portion that is connected to the cylindrical part and attaches around an outer sidewall of the case.
15. The vehicle switch according to claim 10 , wherein
the guide portions of the holding portions are respectively constituted by convex parts; and
the case has grooves formed in an internal wall thereof, and the guide portions are respectively reciprocably engaged in the grooves.
16. The vehicle switch according to claim 10 , wherein
the movable body has a vacant space defined between the holding portions; and
a support member is disposed in the case and supports the detector in the vacant space between the holding portions.
17. The vehicle switch according to claim 16 , wherein
the support member is constituted by a wiring board.