Multi-point type extrusion deformation-resistant accurate positioning opening and closing device

Abstract

The invention discloses a multi-point type extrusion deformation-resistant accurate positioning opening and closing device, which relates to a using device for thin films. The problems of box cover landing offset or depression in the centre of the box cover are found in the practical using process of the design of a film box with a cutter. The multi-point type extrusion deformation-resistant accurate positioning opening and closing device comprises more than two groups opening and closing fulcrums; one of a concaved connector and a convex connector of each group of opening and closing fulcrums is positioned on the box body, and the other one is positioned on the box cover; the convex connector consists of a bottom bearing and a male head; the concaved connector consists of a top bearing and a female head; the top of the male head and the top of the bottom bearing are semi-circular; the bottom of the female head and the top of the top bearing are also semi-circular; the male head is equal to the female head in width; a short shaft is equal to a through hole in diameter; the male head is embedded in the female head; and the short shaft is arranged in the through hole. In the invention, the centre of the box cover is not concaved and deformed; the opening and closing fulcrums are not easy to wear and offset; the landing accuracy of the box cover can be ensured; and the opening angle of the box cover can be enlarged so as to be convenient for pulling the film head out.

Description

technical field [0001] The invention relates to a daily necessities, especially a device for using a film. technical background [0002] Films are widely used in people's daily life, mainly used for food cleaning and preservation. Generally, the film is rolled into a tube and placed in a carton. When using it, the film is pulled out of the carton and placed in the The film is broken on the iron rack on the corner, and there are some problems in the plastic wrap box of this form. It is very inconvenient to break the film on the iron rack, especially for the plastic film with large stretchability. The exposed metal rack with spikes is basically a dangerous decoration. The cutting of the film can only be cut with a knife by hand, which is very inconvenient. The paper box can only be used once for about 30 meters. [0003] The design of the cut-off film box that I proposed in the applications of 2005200474358, 2005200478715, and 200520006577X has two problems in actual use. ...

AI Technical Summary

Problems solved by technology

These two problems both occur when the box body and the box cover have a structure of two front and rear opening and closing fulcrums, because the distance between the film to be cut is longer and the length of the box cover is longer, relying on the front and back two points and the box body Connection, after a long time of reciprocating opening and closing, the opening and closing fulcrum will be worn out, and the cooperation tolerance between the box body and the cutting device on the box cover is very small, once the deviation can not cut the film at all

At the same time, the opening and closing of the box cover is completed in the palm of the hand. The opening and closing of the box cover is often stressed at one point. Due to the low rigidity of the plastic, it is difficult to guarantee that the middle of the box cover is bent and deformed.

If you use a single-core hinge type penetration, you can guarantee that it will not be dented, but it will affect the appearance and make it difficult to process

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