Automatic line missing alarm device for pin inserting machine

The utility model relates to the related technical field of pin inserting machines, and discloses a pin inserting machine wire-lacking automatic alarm device comprising a support plate, one side of the top of the support plate is movably connected with an installation mechanism, one side of the top of the installation mechanism is fixedly provided with an alarm used for wire-lacking alarm, the installation mechanism is provided with a pay-off roller, and the pay-off roller is provided with a wire-lacking alarm. A transmission mechanism used for transmitting pressure is arranged on one side of the bottom of the supporting plate, and a button used for starting the alarm is installed at the bottom of the supporting plate. According to the automatic thread missing alarm device for the needle inserting machine, the weight on the pay-off roller is transmitted to the connecting ring through the sliding rod, at the moment, the elastic piece is compressed, the connecting plate drives the fixing rod to be away from the