Oil leakage preventing device of upper bent needle of sewing machine

Abstract

The invention discloses an oil leakage preventing device of an upper bent needle of a sewing machine. The oil leakage preventing device comprises a machine shell, the upper bent needle, a bent needle slide block and a slide block base. The upper bent needle and the slide block base are assembled on the machine shell. The bent needle slide block is assembled in the slide block base. An oil scraping assembly and multiple pieces of oil cotton are arranged in the bent needle slide block. The oil cotton is located below the oil scraping assembly. The upper bent needle is axially and movably sleeved with the oil scraping assembly and the oil cotton. The position, provided with the oil scraping assembly and the oil cotton, of the bent needle slide block is provided with a closed cover plate. An oil discharge hole is formed in the bent needle slide block. An oil return hole communicated with the oil discharge hole is formed in the machine shell. An oil absorption assembly absorbing away oil stains is arranged at the oil return hole. The oil cotton and the oil scrapping assembly are designed on the upper bent needle. An oil scraping oil seal scraps down and absorbs away part of oil when the upper bent needle moves, the rest of oil is directly absorbed away by the oil cotton, the dual-layer protection is achieved, and it is avoided that the upper bent needle splashes oil; meanwhile, oil in the slide block can be absorbed away through an oil pump with force, the oil absorption capacity of the oil cotton is ensured, and the oil return effect is improved. The invention belongs to the technical field of oil leakage prevention of the sewing machine.

Description

technical field [0001] The invention belongs to the technical field of oil leakage prevention for sewing machines, and more particularly relates to an oil leakage prevention device for loopers on a sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing material are interlaced or sewn together. The sewing machine can sew cotton, linen, silk, wool, artificial fiber and other fabrics and leather, plastic , paper and other products, the stitches sewn are neat and beautiful, flat and firm, fast sewing speed and easy to use. A general sewing machine consists of a machine head, Machine base , transmission and appendix It consists of four parts. The machine head is the main part of the sewing machine. It consists of four mechanisms: barbed material, hook thread, thread take-up and feeding mechanism, and auxiliary mechanisms suc...

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Problems solved by technology

[0003] There are two types of existing upper looper oil prevention devices. One type (3104163.9) is to set up an oil discharge groove on the upper looper slider, and then force the oil to return through the oil pump. The disadvantage of this type is that it will have poor effect and affect the oil pump. The suction requirements are high, while the other type (200810215726.1) uses a rubber sleeve to scrape the oil, and then returns the oil through the pipeline connected to the oil pump. The disadvantage of this type is that the life of the rubber sleeve determines its oil-proof effect. At the same time, this mechanism will obviously reduce the life of the rubber sleeve and affect its oil-proof effect

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