Trackball device
First Claim
Patent Images
1. A trackball device comprising:
- an operating ball;
a plurality of rollers configured to rotate by contacting the ball while the ball is rotated;
a plurality of multipole permanent magnets configured to co-rotate with each of the rollers, respectively, each of the permanent magnets having a ring shape; and
a plurality of reed switches arranged in positions such that each of the reed switches turns on and off as a result of changes in magnetic flux caused by rotation of a respective one of the permanent magnets,wherein the reed switches are configured and arranged with respect to the permanent magnets such that an attractive force generated between one of the reed switches and a respective one of the permanent magnets affects a rotation state of a respective one of the rollers and transmits a tactile feedback via the ball while the ball is rotated,wherein each of the reed switches is disposed at a height equal to a height of a rotation axis of the respective one of the permanent magnets in a circumferential direction of the respective one of the permanent magnets,and wherein each of the reed switches is further configured and arranged with respect to the respective one of the permanent magnets such that the attractive force intensifies when the switch is turned on.
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Abstract
A trackball device of the present invention includes an operating ball, multiple rollers which rotate by contacting the ball while it is rotated, multipole permanent magnets which co-rotate with these rollers, and a reed switch disposed in a position where it turns on and off as a result of changes in magnetic flux caused by the rotation of the permanent magnets so as to provide tactile feedback when the ball is rotated. The trackball device is configured to make an attractive force generated between the reed switch and permanent magnet affect the rotation of the rollers.
61 Citations
7 Claims
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1. A trackball device comprising:
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an operating ball; a plurality of rollers configured to rotate by contacting the ball while the ball is rotated; a plurality of multipole permanent magnets configured to co-rotate with each of the rollers, respectively, each of the permanent magnets having a ring shape; and a plurality of reed switches arranged in positions such that each of the reed switches turns on and off as a result of changes in magnetic flux caused by rotation of a respective one of the permanent magnets, wherein the reed switches are configured and arranged with respect to the permanent magnets such that an attractive force generated between one of the reed switches and a respective one of the permanent magnets affects a rotation state of a respective one of the rollers and transmits a tactile feedback via the ball while the ball is rotated, wherein each of the reed switches is disposed at a height equal to a height of a rotation axis of the respective one of the permanent magnets in a circumferential direction of the respective one of the permanent magnets, and wherein each of the reed switches is further configured and arranged with respect to the respective one of the permanent magnets such that the attractive force intensifies when the switch is turned on. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification