One-way self-locking device for massager

A one-way self-locking device for a massager, comprising a transmission shaft, a shaft sleeve, a torsional spring, and a big belt wheel;

• the transmission shaft being rotatably mounted in a housing of a massager, the big belt wheel being rotatably sleeved on the transmission shaft, the big belt wheel being driven by a power mechanism to drive the transmission shaft to rotate circumferentially, the transmission shaft driving a massage component to work through a deflection component;
• the shaft sleeve being fixedly mounted on the transmission shaft, the torsional spring being sleeved on the shaft sleeve, the torsional spring consisting of a main body portion and a first connecting portion and a second connecting portion that are disposed on two sides of the main body portion, the first connecting portion of the torsional spring being in a lapped connection with the shaft sleeve and being in interference fit with the shaft sleeve, the main body portion of the torsional spring being sleeved on the shaft sleeve and being in clearance fit with the shaft sleeve, the second connecting portion of the torsional spring being fixedly connected to the big belt wheel.