Patent ID: 9540751
Date: 2017-01-10
CPC Classifications: D05B,D05D

Claim:
1. A sewing machine with a threading and air supply selecting device comprising: a base, a drive force source, a main shaft driven by the drive force source, at least one thread wiper driven by the main shaft, and a guiding pipe provided on the thread wiper, each of the guiding pipes having one end extended to a thread-inserting hole of the thread wiper, and another end fixed to a pipe-guiding frame of the thread wiper; characterized in that: the drive force source driving an air supply device, between the air-supply device and the pipe-guiding frames is disposed a pipe-moving device which includes a pipe-moving frame and a connecting pipe mounted on the pipe-moving frame and connected to the air supply device, the pipe-moving frame is provided at one end thereof with a main guiding member, a position where the main guide member moves to a connection between the connecting pipe and the guiding pipe is defined as a first position, and a position where the main guiding member moves away from the connection between the connecting pipe and the guiding pipe is defined as a second position; and the main guiding member has one end connected to one end of a swing arm, another end of the swing arm is abutted against an air-supply clutch, the air-supply clutch is disposed on a power shaft of the drive force source, the swing arm, when in the first position, controls the air-supply clutch to transmit a drive force of the power shaft to the air supply device, or, the swing arm, when in the second position, controls the air-supply clutch to stop transmitting the drive force of the power shaft to the air supply device.