Safety shredder with mechanical bin-full device
AssigneeAurora Office Equipment Co., Ltd. Shanghai
InventorsYung Kang Tso, Xiuming Liu
Life of this patent
Estimating the term…
Abstract
A mechanical bin-full device for a paper shredder with a bin, having a curved, perforated T-blade sensor on a cylindrical body partially covered with a metal sheet. The T-blade is pendent into the bin. Metal contacts are placed on the paper shredder near the metal sheet, forming a switch, which is coupled to a motor control circuit for the shredder motor. The T-blade is pushed by paper shreddant and rotates the cylinder body as paper shreddant fills the bin. When the bin becomes full, the T-blade is positioned so that the metal contacts touch the metal sheet, closing the control circuit switch, and causing the motor to cease operating. The control circuit can include a microcontroller coupled to the motor, or a transistor-based driver coupled to a motor relay.
Claims11
A bin-full sensor configured for a shredder having a shredder element with blades driven by an electric motor and a bin for collecting shreddant, the bin-full sensor comprising:
- a T-blade sensor including an arc-shaped pressing plate mechanically coupled to and set apart from the shredder element, the T-blade sensor being electrically coupled to the electric motor, by a non-continuous conductive portion coupled to the pressing plate;
- and
- an electrical contact coupled to the electrical motor and disposed at a predefined position,
- wherein when the shreddant rises to a predetermined level in the bin the T-blade sensor rotates to the predefined position wherein the non-continuous conductive portion rotates and selectively contacts the electrical contact deactivating the electric motor.
A mechanical bin-full sensor configured for a shredder driven by an electric motor and having a bin for shreddant, comprising:
- a T-blade sensor electrically coupled to the electric motor and mechanically coupled to the shredder, the T-blade sensor including a pendent, curved, and perforated blade perpendicularly coupled to a cylindrical body, the cylindrical body having non-continuous electrical sensor at a predefined position and configured to electrically connect with electrical contacts coupled to the electric motor,
- wherein when shreddant rises to a predetermined level in the bin, the T-blade sensor rotates to the predefined position to contact the electrical contact and render the electric motor inoperable.
Dependencies are inferred from the claim text.