A plastic bobbin and a sewing machine bobbin set

Abstract

The invention relates to a plastic cop latch and a sewing machine cop latch suite. The plastic cop latch comprises a winding shaft and flanges respectively arranged at the two ends of the winding shaft and extending outward along the radial direction of the winding shaft; the winding shaft and the two flanges are made from engineering plastics and integrated, and a cross section of the winding shaft and flanges is I-shaped along the axial direction of the winding shaft and flanges. The plastic cop latch is made from the engineering plastics, on basis of keeping relative hardness, compared witha metallic cop latch such as an iron-made cop latch, an aluminum-made cop latches and the like, the weight is lighter, the plastic cop latch has a better braking effect and more stable stitch; compared with a traditional metallic cop latch, the hardness of the plastic cop latch is moderate, and thereby needle breaking probability can be effectively reduced. In addition, when the plastic cop latchis matched with a bobbin case for use, the friction force is smaller, the problem that the large friction between the metallic bobbin case and the metallic cop latch causes serious wear of parts canbe effectively solved; under the circumstance that remaining amount of bottom lines is small, the cop latch can still maintain stable tension output.

Description

technical field [0001] The invention relates to the field of sewing accessories, in particular to a plastic bobbin and a sewing machine bobbin case. Background technique [0002] The sewing machine bobbin is an essential key part inside the sewing machine. With the further improvement of the quality requirements of the factory and customers for the sewing products, stable tension output has become an urgent need of the factory. At present, the existing bobbin products are made of iron or aluminum, and the weight is relatively heavy. When the amount of thread inside the bobbin is small, the idling time due to inertia becomes longer, which will seriously affect the braking quality and thus affect the stitches of the sewn products. . Thereby cause sewing product not to reach ideal sewing effect. In addition, iron and aluminum have higher hardness and are more likely to break when they come into contact with machine needles. And bobbin case and bobbin core are the same as met...

AI Technical Summary

Problems solved by technology

At present, the existing bobbin products are made of iron or aluminum, and the weight is relatively heavy. When the amount of thread inside the bobbin is small, the idling time due to inertia becomes longer, which will seriously affect the quality of the brakes and affect the stitches of the sewn products.

As a result, the sewing products cannot reach the ideal sewing effect

And the hardness of iron and aluminum is higher, and it is easier to break when it comes into contact with the machine needle

And in the prior art, the bobbin case and the bobbin are the same metal, because the material friction coefficient of the same material is larger, so it is easier to wear

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