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US 11,958,710 B2Granted
Sheet detection device, paper discharge device, and image forming apparatus
AssigneeSharp Kabushiki Kaisha
InventorsYuki Taniguchi, Tsuyoshi Shibayama
Life of this patent
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Abstract
A sheet detection device includes, as detection pieces, a first detection piece integrally provided on a rotary shaft and a second detection piece attached to the first detection piece via a biasing member. The second detection piece is capable of rotation in conjunction with the first detection piece under a biasing force of the biasing member. When the second detection piece is brought into contact with a ceiling at an upper part of the rotary shaft, the second detection piece stops further rotation while the first detection piece is capable of rotation together with the rotary shaft against the biasing force.
Claims9
A sheet detection device comprising:
- an actuator that is swingably in contact with a sheet;
- a rotary shaft that supports the actuator and rotates with the actuator;
- a detection piece that is supported by the rotary shaft and is rotatable therewith;
- and
- a detection sensor a detection area of which overlaps a rotation trajectory of the detection piece, wherein
- the detection piece includes a first detection piece integrally provided on the rotary shaft and a second detection piece attached to the first detection piece via a biasing member,
- the second detection piece is rotatable in conjunction with the first detection piece under a biasing force of the biasing member,
- when the second detection piece is brought into contact with a ceiling disposed at an upper part of the rotary shaft, the second detection piece stops further rotation, while the first detection piece is rotatable together with the rotary shaft against the biasing force,
- the first detection piece and the second detection piece are provided to face each other in an axial direction of the rotary shaft, and
- the first detection piece is provided within a projected area of the second detection piece in the axial direction.
7 more elements
A sheet detection device comprising:
- an actuator that is swingably in contact with a sheet;
- a rotary shaft that supports the actuator and rotates with the actuator;
- a detection piece that is supported by the rotary shaft and is rotatable therewith;
- and
- a detection sensor a detection area of which overlaps a rotation trajectory of the detection piece, wherein
- the detection piece includes a first detection piece integrally provided on the rotary shaft and a second detection piece attached to the first detection piece via a biasing member,
- the second detection piece is rotatable in conjunction with the first detection piece under a biasing force of the biasing member,
- when the second detection piece is brought into contact with a ceiling disposed at an upper part of the rotary shaft, the second detection piece stops further rotation, while the first detection piece is rotatable together with the rotary shaft against the biasing force,
- the first detection piece has a guide protrusion protruding toward the second detection piece, and
- the second detection piece has a substantially arcuate guide groove around the rotary shaft, and the guide protrusion can slide in the guide groove.
7 more elements
A sheet detection device comprising:
- an actuator that is swingably in contact with a sheet;
- a rotary shaft that supports the actuator and rotates with the actuator;
- a detection piece that is supported by the rotary shaft and is rotatable therewith;
- and
- a detection sensor a detection area of which overlaps a rotation trajectory of the detection piece, wherein
- the detection piece includes a first detection piece integrally provided on the rotary shaft and a second detection piece attached to the first detection piece via a biasing member,
- the second detection piece is rotatable in conjunction with the first detection piece under a biasing force of the biasing member,
- when the second detection piece is brought into contact with a ceiling disposed at an upper part of the rotary shaft, the second detection piece stops further rotation, while the first detection piece is rotatable together with the rotary shaft against the biasing force,
- the second detection piece is provided to be rotatable with respect to the rotary shaft,
- the biasing member biases the second detection piece, with respect to the first detection piece, upward in a direction of rotation around the rotary shaft, and
- the biasing member is a kick spring having a coil externally attached to the rotary shaft and a locking portion extending from the coil and locked by the first detection piece and the second detection piece, respectively, and is disposed in a contracted state.
8 more elements
Dependencies are inferred from the claim text.