Dust inflow sensing unit and robot cleaner having the same
First Claim
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1. A robot cleaner, comprising:
- a main body;
a drive unit to drive the main body;
a brush drum unit provided on the main body to form a dust inflow channel; and
a dust inflow sensing unit to sense dust flowing into the main body through the dust inflow channel of the brush drum unit, the dust inflow sensing unit including;
a light emitting part having a transmission region to emit a beam, anda light receiving part having a reception region to overlap the transmission region and the reception region is restricted to a designated range, the light receiving part including a light receiving element and a light receiving guide member to restrict the reception region of the light receiving element,wherein the light receiving guide member enables a width of the reception region of the light receiving element to be gradually decreased in a direction toward the light emitting part.
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Abstract
A dust inflow sensing unit and a robot cleaner having the same. The dust inflow sensing unit includes a light emitting element to emit a beam having a transmission region, a light receiving element having a reception region overlapping the transmission region of the light emitting element, and a guide member to restrict the reception region of the light receiving element to a designated range until the reception region reaches the light emitting element.
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Citations
12 Claims
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1. A robot cleaner, comprising:
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a main body; a drive unit to drive the main body; a brush drum unit provided on the main body to form a dust inflow channel; and a dust inflow sensing unit to sense dust flowing into the main body through the dust inflow channel of the brush drum unit, the dust inflow sensing unit including; a light emitting part having a transmission region to emit a beam, and a light receiving part having a reception region to overlap the transmission region and the reception region is restricted to a designated range, the light receiving part including a light receiving element and a light receiving guide member to restrict the reception region of the light receiving element, wherein the light receiving guide member enables a width of the reception region of the light receiving element to be gradually decreased in a direction toward the light emitting part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A robot cleaner comprising:
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a main body; a drive unit to drive the main body; a brush drum unit provided on the main body to form a dust inflow channel; and a dust inflow sensing unit to sense dust flowing into the main body through the dust inflow channel of the brush drum unit, the dust inflow sensing unit including; a light emitting part having a transmission region to emit a beam, and a light receiving part having a reception region to overlap the transmission region and the reception region is restricted to a designated range, the light receiving part including a light receiving element and a light receiving guide member to restrict the reception region of the light receiving element, wherein the light receiving guide member enables a width of the reception region of the light receiving part to be uniformly maintained in a direction toward the light emitting part. - View Dependent Claims (10)
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11. A robot cleaner comprising:
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a main body; a drive unit to drive the main body; a brush drum unit provided on the main body to form a dust inflow channel; and a dust inflow sensing unit to sense dust flowing into the main body through the dust inflow channel of the brush drum unit, the dust inflow sensing unit including; a light emitting part having a transmission region to emit a beam, and a light receiving part having a reception region to overlap the transmission region and the reception region is restricted to a designated range, the light receiving part including a light receiving element and a light receiving guide member to restrict the reception region of the light receiving element, wherein the guide member enables a width of the reception region of the light receiving part to be gradually increased in a direction toward the light emitting part. - View Dependent Claims (12)
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Specification