Sewing machine air suction device with suction adjusting function

Abstract

The invention provides a sewing machine air suction device with a suction adjusting function. The device comprises a trash bin and a top cover arranged on the top of the trash bin. The top cover is provided with a cloth suction inlet and a thread end suction inlet. The device further comprises a suction adjusting piece used for adjusting the suction when a thread end is sucked in. The suction adjusting piece is detachably installed on the cloth suction inlet and comprises an installation piece capable of being fixed to the cloth suction inlet and an adjusting rotary knob, wherein the adjusting rotary knob is arranged on the top of the installation piece and can rotate relative to the installation piece. The top face of the installation piece is provided with a plurality of first air inlets. The adjusting rotary knob is provided with a plurality of second air inlets corresponding to the first air inlets. The first air inlets and the second air inlets can be partially or completely communicated by rotating the adjusting rotary knob. The suction of the thread end suction inlet can be adjusted easily, the suction at the thread end suction inlet is prevented from being too large, and the sewing machine air suction device is simple in structure and reliable in adjustment.

Description

technical field [0001] The invention relates to a sewing machine air suction device, in particular to a sewing machine air suction device with suction adjustment. Background technique [0002] The suction dust collection device is one of the most important additional devices in the sewing machine, which is used to collect impurities such as thread ends and rags. Existing sewing machine suction devices are divided into pneumatic and electric. The installation of the pneumatic structure is complicated, the cost is high, and the suction adjustment is difficult. If the suction device is too strong during the sewing process, it is easy to suck the thread after trimming If the suction is small, the braids will easily block the suction port. However, in the electric air suction device, only relying on the electronic structure to adjust the power of the air suction motor to adjust the suction force, this method has instability, complicated procedures, low service life and high cost...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sewing machine suction device with suction adjustment, which is used to solve the problem in the prior art that the suction is difficult to adjust when the thread is sucked.

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