Back to results
US 10,884,368 B2Granted
Sheet determination apparatus using ultrasonic wave transmitting unit or reception unit
AssigneeCanon Kabushiki Kaisha
InventorTsutomu Ishida
Life of this patent
Estimating the term…
Abstract
A protection member is arranged such that the distance from an opening plane of a reception guide to the center of the protection member is half of the distance from the opening plane of the reception guide to the surface of a reception vibration member. In other words, the arrangement position of the protection member is in the center between the opening plane of the reception guide and the surface of the reception vibration member. Accordingly, even if a protection member is arranged, a transmission coefficient is obtained that is equal to a transmission coefficient in the case where no protection member is present.
Claims32
An ultrasonic wave transmission unit comprising:
- a vibration member that vibrates so as to transmit ultrasonic waves;
- a guide member that surrounds the vibration member and guides the ultrasonic waves transmitted from the vibration member to the outside of the guide member through an opening, the opening being formed on an end of the guide member opposite to the vibration member by the guide member surrounding the vibration member;
- and
- one or more protection members which do not cross with each other in viewing from the opening to the vibration member, and which protect the vibration member, and which extend from a first position to a second position different from the first position on an inner wall of the guide member and exist in an inner space of the guide member between the vibration member and the opening,
- wherein the one or more protection members and the guide member are unified and formed by resin.
2 more elements
An ultrasonic wave reception unit comprising:
- a vibration member that vibrates by receiving ultrasonic waves;
- a guide member that surrounds the vibration member and guides the ultrasonic waves from an opening of the guide member to the vibration member, the opening being formed on an end of the guide member opposite to the vibration member by the guide member surrounding the vibration member;
- and
- one or more protection members which do not cross with each other in viewing from the opening to the vibration member, and which protect the vibration member, and which extend from a first position to a second position different from the first position on an inner wall of the guide member and exist in an inner space of the guide member between the vibration member and the opening,
- wherein the one or more protection members and the guide member are unified and formed by resin.
2 more elements
A sheet determination apparatus for determining a type of a sheet, the sheet determination apparatus comprising:
- an ultrasonic wave sensor that includes:
- a transmission unit including a transmission vibration member that vibrates so as to transmit ultrasonic waves and a transmission guide member that surrounds the transmission vibration member and guides the ultrasonic waves transmitted from the transmission vibration member to the outside of the transmission guide member through an opening, the opening being formed on an end of the transmission guide member opposite to the transmission vibration member by the transmission guide member surrounding the transmission vibration member, and one or more protection members which do not cross with each other in viewing from the opening to the transmission vibration member, and which protect the transmission vibration member, and which extend from a first position to a second position different from the first position on an inner wall of the transmission guide member and exist in an inner space of the transmission guide member between the transmission vibration member and the opening;
- and
- a reception unit that receives ultrasonic waves that have been transmitted from the transmission vibration member and attenuated via a sheet;
- and
- a determination unit that determines the type of the sheet based on the ultrasonic waves received by the reception unit,
- wherein the one or more protection members and the transmission guide member are unified and formed by resin.
4 more elements
A sheet determination apparatus for determining a type of a sheet, the sheet determination apparatus comprising:
- an ultrasonic wave sensor that includes:
- a transmission unit that transmits ultrasonic waves;
- and
- a reception unit including a reception vibration member that vibrates by receiving ultrasonic waves that have been transmitted from the transmission unit and attenuated via a sheet and a reception guide member that surrounds the reception vibration member and guides the ultrasonic waves from an opening of the reception guide member to the reception vibration member, the opening being formed on an end of the reception guide member opposite to the reception vibration member by the reception guide member surrounding the reception vibration member, and one or more protection members which do not cross with each other in viewing from the opening to the reception vibration member, and which protect the reception vibration member, and which extend from a first position to a second position different from the first position on an inner wall of the reception guide member and exist in an inner space of the reception guide member between the reception vibration member and the opening;
- and
- a determination unit that determines the type of the sheet based on ultrasonic waves received by the reception unit,
- wherein the one or more protection members and the reception guide member are unified and formed by resin.
4 more elements
An image forming apparatus comprising:
- an ultrasonic wave sensor that includes:
- a transmission unit including a transmission vibration member that vibrates so as to transmit ultrasonic waves and a transmission guide member that surrounds the transmission vibration member and guides the ultrasonic waves transmitted from the transmission vibration member to the outside of the transmission guide member through an opening, the opening being formed on an end of the transmission guide member opposite to the transmission vibration member by the transmission guide member surrounding the transmission vibration member, and one or more protection members which do not cross with each other in viewing from the opening to the transmission vibration member, and which protect the transmission vibration member, and which extend from a first position to a second position different from the first position on an inner wall of the transmission guide member and exist in an inner space of the transmission guide member between the transmission vibration member and the opening;
- and
- a reception unit that receives ultrasonic waves that have been transmitted from the transmission vibration member and attenuated via a sheet;
- an image forming unit that forms an image on a sheet;
- and
- a control unit that controls an image formation condition used by the image forming unit according to ultrasonic waves received by the reception unit,
- wherein the one or more protection members and the transmission guide member are unified and formed by resin.
5 more elements
An image forming apparatus comprising:
- an ultrasonic wave sensor that includes:
- a transmission unit that transmits ultrasonic waves;
- and
- a reception unit including a reception vibration member that vibrates by receiving ultrasonic waves that have been transmitted from the transmission unit and attenuated via a sheet and a reception guide member that surrounds the reception vibration member and guides ultrasonic waves from an opening of the reception guide member to the reception vibration member, the opening being formed on an end of the reception guide member opposite to the reception vibration member by the reception guide member surrounding the reception vibration member, and one or more protection members which do not cross with each other in viewing from the opening to the reception vibration member, and which protect the reception vibration member and which extend from a first position to a second position different from the first position on an inner wall of the reception guide member and exist in an inner space of the reception guide member between the vibration member and the opening;
- an image forming unit that forms an image on a sheet;
- and
- a control unit that controls an image formation condition used by the image forming unit according to ultrasonic waves received by the reception unit,
- wherein the one or more protection members and the reception guide member are unified and formed by resin.
5 more elements
Dependencies are inferred from the claim text.