Rotary letter opening cutter and application method thereof

Abstract

The invention discloses a rotary letter opening cutter and an application method thereof. The rotary letter opening cutter comprises a first shell (1), a key (2), a sleeve (10), a letter opening cutter (4) and a second shell (26); the key (2) is accommodated in a first through hole (3); first positioning grooves (12) are in concave-convex fit with a first positioning projection (8); the sleeve (10) sleeves the key (2); a second positioning groove (13) and a second positioning projection (16) are in concave-convex fit; the sleeve (10) is accommodated in a second through hole (19); a third positioning groove (20) and a third positioning projection (17) are in concave-convex fit; a first clamping piece (7) is clamped with a first annular groove (14); a second clamping piece (31) is clamped with a second annular groove (15); and the first through hole (3), the key (2), the sleeve (10), the second through hole (19) and a support base (28) are coaxial.

Description

technical field [0001] The invention relates to the field of office supplies, in particular to a rotating letter-opening cutter and a using method thereof. Background technique [0002] There are many ways to disassemble the envelope, such as tearing it with bare hands, cutting it with a knife, or cutting it with scissors. It is easy to damage the letter if it is torn open with bare hands. Not only is it difficult to find the incision, but the tip of the knife penetrates into the inside of the envelope and the contents are easily damaged by mistake; scissors are difficult to cut straight and beautiful. The knife usually has a body that can be held, and one end of the body has a blade, and the blade can be used to cut the seal of the envelope, so as to maintain the consistency of the envelope opening and avoid damaging the letter inside the envelope. However, the blade of the existing letter opener is fixed on the body, and the blade of the existing letter opener is exposed ...

AI Technical Summary

Problems solved by technology

It is easy to damage the letter if it is torn open with bare hands. Not only is it difficult to find the incision, but the tip of the knife penetrates into the inside of the envelope and the contents are easily damaged by mistake; scissors are difficult to cut straight and beautiful. The knife usually has a body that can be held, and one end of the body has a blade, and the blade can be used to cut the seal of the envelope, so as to maintain the consistency of the envelope opening and avoid damaging the letter inside the envelope. However, the blade of the existing letter opener is fixed on the body, and the blade of the existing letter opener is exposed outside the body during use, which is easy to cut the receiver's hand, causing danger, especially , the edge of a letter opener with a large gap is particularly likely to cause wounds, and the edge is exposed without protection, and has the disadvantages of being easy to get dirty and rusted. How to improve the use value of the letter opener without harming the human body and at the same time protect the blade clean

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