Aurora Office Equipment Co., Ltd. Shanghai

Aurora Office Equipment Co., Ltd.

Kent Chen

A round cutter-blade of a paper shredder includes a body having a surface, a periphery, and an opening formed therethrough; and at least one triangular shaped knife-edge that is integrally formed with the surface of the body and is turned over the periphery of the body. The cutter-blade can cut broken paper into short fragments, thus raising the secure requirement greatly and reducing the cost due to a reduction of thickness of the round cutter-blade.

Round cutter-blade of a paper shredder

The present invention discloses a cutter structure of a paper shredder, which comprises a pull-rod (), paper guide combs (), cutter arbors (), and at least one cutter-blade set composed of two cutter-blades (), with said cutter-blade set being slipped on said cutter arbor (), said pull-rod () being passing through the hole set on said paper guide combs (), at least two lugs () being set on the bore () of said cutter-blade () and extending toward a cutter spoke (), the height of said lug () along axial direction of the cutter-blade () is greater than the thickness of said cutter blades (); with recesses () being set on cylindrical cutter arbors (), the number of which is no less than that of said lug () which can be placed into said recess (); said paper guide combs () being set between said cutter-blade sets; said paper guide combs () being slipped on said cutter arbor (). The present utility model can omit a cutter ring used in conventional cutter structure, thus reducing the components in whole cutter structure, simplifying the fixing and increasing the radial amount of feed of the cutter-blade while decreasing the cost.

Cutter structure of a paper shredder

A two-way self-lock paper shredder has a functional switch (), a shredding mechanism (), a control circuit power source () electrically connected to the said functional switch (), as well as the following control circuits: a CPU (), a motor-driving circuit (), a reverse detection circuit (), a paper-in detection circuit (), and an unlocking circuit (). If there is neither an input of paper-in signal nor an input of reverse signal after the paper is shredded, the said paper-in detection circuit () will transfer a self-lock signal to said CPU () and then the CPU () begins timing. When the duration of said self-lock signal exceeds the preset value, the CPU () will shut off the motor-driving circuit () and the paper shredder will be self-locked. The aforesaid unlocking circuit () contains an unlocking key, and reset of the said unlocking key can unlock the paper shredder. The present utility model enhances the safety of the paper shredder efficiently, so as to avoid unnecessary hidden trouble.

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Shanghai, China

Kent Chen