Preservative film cutting device cutting by teeth

Abstract

The invention provides a preservative film cutting device cutting by teeth, and belongs to the technical field of daily necessities. A principle that tightening force and shear force are generated when opposite cross sections of two tooth-type surfaces begin to cross is used to achieve an objective of cutting a preservative film. The device comprises an upper cutter and a lower cutter. The upper cutter and the lower cutter are in a long strip shape, and length is larger than width of the preservative film. Each of the upper cutter and the lower cutter is provided with a side surface which is a tooth-type surface. The tooth-type surfaces of the upper cutter and the lower cutter are opposite. The tooth-type surfaces are provided with vertical tooth tops and vertical tooth roots arranged in sequence. The tooth tops of the upper cutter are on the tooth root positions of the lower cutter. The top end of the upper cutter is fixed in front of the bottom of the cover. The bottom end of the lower cutter is fixed in front of an outlet on the top end of the box. The device is advantaged in that the arrangement of distance between the tooth-type surfaces has relatively large latitude, and the structure is simple, and because no teeth-cutter exists, a hand would not be hurt when the hand pulls the preservative film.

Description

technical field [0001] The invention belongs to the technical field of daily necessities, and in particular relates to a tooth-shearing plastic wrap cutting device. technical background [0002] Plastic wrap is widely used in people's daily life, mainly used for food cleaning and preservation. Now the usual usage of plastic wrap is to roll up the plastic wrap and place it in a carton. When using it, pull the plastic wrap from the carton. Come out, and then put the plastic wrap on the rack on the carton and forcibly pull it off, or cut it with scissors, and cut it with a knife for use. [0003] The above usage has the following problems in operation: it is not convenient to use, and it is not easy to break the plastic wrap on the rack of the carton, especially for the plastic wrap with large stretchability; The problem of not being able to withstand repeated tossing and repeated use is that the carton can only be used once for about 30 meters before being discarded and usele...

AI Technical Summary

Problems solved by technology

[0003] The above usage has the following problems in operation: it is not convenient to use, and it is not easy to break the plastic wrap on the rack of the carton, especially for the plastic wrap with large stretchability; The problem of not being able to withstand repeated tossing and repeated use is that the carton can only be used once for about 30 meters before being discarded and useless, which is not conducive to environmental protection and resource recycling; in addition, the tooth tops exposed outside the packaging are also easy to cause scratches. And there are certain safety hazards for children

[0004] Chinese patents CN96229952.9, CN2005200474358, CN2005200478715, and CN200520006577X before the present inventor disclose the design of the cut-off plastic wrap box. The core technology is that when the upper cover is closed, the cutting aids on both sides of the knife groove fix the plastic wrap. On the knife groove, the cutter enters the knife groove from above to cut off the plastic wrap. The problem is that the cutting aid device is a flat structure, and the fixing of the plastic wrap film depends on the cooperation between the upper and lower cutting aid devices. The small ones The gap can produce a large fixing force, but it takes a lot of pressure to make the cutter run down; a large gap only needs to spend a small pressure to make the cutter run down, and the problem is that there are various types of plastic wrap , some are brittle, some are tough, some are flexible, and the constant gap will cause the problem that the plastic wrap cannot be fixed or the plastic wrap cannot be cut; Cutting; how to easily fix and tighten the plastic wrap is a problem that needs to be solved when cutting the plastic wrap

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