Device for removing water droplets
First Claim
1. A device for removing water droplets comprising a plate-like member, an ultrasonic vibrator bonded to the rear face of said plate-like member and oscillation means for vibrating said ultrasonic vibrator at a determined frequency, whereinthe thickness of said ultrasonic vibrator is defined as within a range;
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space="preserve" listing-type="equation">0.25≦
T≦
2.5twheret represents the thickness of the plate-like member and T represents the thickness of the ultrasonic vibrator, andwherein said plate-like member is bent repeatedly by vibration of said ultrasonic vibrator in a direction parallel to a face of said plate-like member, thereby removing water droplets deposited on said plate-like member.
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Accused Products
Abstract
A device for removing water droplets comprises a plate-like member disposed vibratably, a vibrator bonded to the rear face of the plate-like member and oscillation means for vibrating the vibrator at a predetermined frequency, wherein the thickness and/or the diameter of the vibrator is optimized in relation with the thickness thereof, or the longitudinal, lateral width or thickness of the plate-like member. The water droplets on the plate-like member, e.g., automobile mirror can be removed effectively and uniformly with no worry for the destruction of the vibrator. The oscillation means may, advantageously, be adapted to cause bending vibrations to the vibrator by lateral effect.
24 Citations
12 Claims
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1. A device for removing water droplets comprising a plate-like member, an ultrasonic vibrator bonded to the rear face of said plate-like member and oscillation means for vibrating said ultrasonic vibrator at a determined frequency, wherein
the thickness of said ultrasonic vibrator is defined as within a range; -
space="preserve" listing-type="equation">0.25≦
T≦
2.5twhere t represents the thickness of the plate-like member and T represents the thickness of the ultrasonic vibrator, and wherein said plate-like member is bent repeatedly by vibration of said ultrasonic vibrator in a direction parallel to a face of said plate-like member, thereby removing water droplets deposited on said plate-like member. - View Dependent Claims (3, 4, 7, 10)
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2. A device for removing water droplets comprising a plate-like member, an ultrasonic vibrator bonded to the rear face of said plate-like member and oscillation means for causing said ultrasonic vibrator to conduct bending vibration due to lateral effect at a predetermined frequency, wherein,
the diameter of said ultrasonic vibrator is defined as within at least one of ranges: -
space="preserve" listing-type="equation">D≦
L/3 and D≦
H/2where D represents the diameter of the ultrasonic vibrator, L represents the lateral width of the plate-like member and wherein said plate-like member is bent repeatedly due to lateral effect of said ultrasonic vibrator, thereby removing water droplets deposited on said plate-like member. - View Dependent Claims (8, 11)
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5. A device for removing water droplets comprising a plate-like member, an ultrasonic vibrator of a polygonal shape bonded to the rear face of said plate-like member and oscillation means for causing said ultrasonic vibrator to conduct bending vibration due to lateral effect at a predetermined frequency, wherein
said plate-like member is repeatedly bent due to lateral effect of said ultrasonic vibrator, thereby removing water droplets deposited to said plate-like member.
Specification