Needle plate used for sewing machine, and sewing machine

Abstract

The invention provides a needle plate used for a sewing machine. The needle plate comprises a needle plate body. The needle plate body is provided with a needle hole and a needle plate tongue on the needle hole. The needle plate tongue is used to wind sewing threads. The needle plate tongue is internally provided with a thread absorbing channel. One end of the thread absorbing channel, close to the needle hole, is provided with a thread absorbing inlet. The needle plate tongue is provided with a first thread hanging portion. The first thread hanging portion can move front and back along the direction parallel to a feeding direction of the sewing machine. When the sewing machine sews, the first thread hanging portion is on the needle hole. When the sewing machine finishes sewing, the firstthread hanging portion moves towards the direction far away from the needle hole, and wind absorbing air flow forms on the thread absorbing inlet, that is, the first thread hanging portion moves out from a thread braid which is winded on the needle plate tongue, so the thread braid which is winded on the needle plate tongue is loose, and under the action of the wind absorbing air flow, the threadbraid is easily absorbed into the thread absorbing channel from the thread absorbing inlet, and a previous thread braid can be wrapped into a new overedge-stitch after next sewing starts is guaranteed.

Description

technical field [0001] The invention relates to a needle plate for a sewing machine. [0002] The present invention also relates to a sewing machine comprising the above-mentioned needle plate for a sewing machine. Background technique [0003] At present, during the sewing process of the overlock sewing machine, when the sewing is finished, a section of thread braid will be reserved, so that the thread braid will remain at the front end of the fabric during the next sewing, which is the front thread braid. After each sewing, if the reserved thread braids are too long, the front thread braids at the front of the fabric will be too long, which will directly lead to unsightly sewing products and affect the quality of clothing; if the reserved thread braids are too short, the thread braids will Easy to loose. In order to solve the above problems, a needle plate with a thread suction channel has appeared in the prior art, such as the needle plate of an overlock sewing machine ...

AI Technical Summary

Problems solved by technology

[0004] But the needle plate of the above-mentioned overlock sewing machine still has the following defects in the actual use process: 1, because the thread braid is wound on the tongue of the needle plate, and the thread has a certain tension, therefore, under a certain range of negative pressure, The thread braids wound on the tongue of the needle plate cannot be effectively sucked into the thread suction channel on the needle plate, thereby affecting the success rate of the envelope identification; 2. The width of the hemming cannot be adjusted. It is necessary to replace the needle plates of the needle plate tongues of different widths, resulting in a sewing machine equipped with multiple needle plates of different specifications, which increases the cost of the sewing machine, and the multiple needle plates are not easy to store, and it is troublesome to replace the needle plates

Images