Abstract: An auto paper-combing mechanism of a paper shredder has a frame formed with a feeding channel and a fixing shaft, and a feeding salver. A plurality of combing needle beds are disposed on the fixing shaft; a combing needle is inserted in the bottom of each combing needle bed. The needlepoint of each combing needle heads toward the outlet of the feeding channel, and the height of combing needles are in a ladder-like distribution. The vertical distances between the needlepoint of each combing needle and the lower edge of the outlet of the feeding channel are equal.

Abstract: The present invention discloses a paper cutting blade for a paper shredder, which paper cutting blade comprises two blade single bodies abutted against each other, in which said blade single body has an outer plane perpendicular to the axis of said blade single body and an outer circumferential surface located on the outer circumference of said blade single body with the axis of said blade single body as a symmetry axis, a blade edge is formed on the conjunction of said outer plane and said outer circumferential surface; when viewing from a longitudinal section of said blade single body, said blade edge is defined by an even straight line extending outwards along the radial direction of said outer plane and an curved line extending obliquely outwards along the axial direction of said outer circumferential surface.

Abstract: The present invention provides an auto paper-combing mechanism of a paper shredder, comprises a frame which is formed with a feeding channel and a fixing shaft, and a feeding salver; a plurality of combing needle beds are disposed on the fixing shaft along the axial direction in sequence, a combing needle is respectively inserted on the bottom of each combing needle bed, the needlepoint of each combing needle heads towards the outlet of the feeding channel, and the height of combing needles are in ladder-like distribution and along the axial direction of the fixing shaft in sequence, furthermore, the vertical distances between the needlepoint of each combing needle and the lower edge of the outlet of the feeding channel are equal. The present invention also provides an auto paper-feeding mechanism of a paper shredder. Compared with the prior art, the height of the combing needles are in ladder-like distribution and in sequence, which can realize auto paper-combing. The whole mechanism is relatively simple.