Operating mechanism

An operating mechanism, comprising:

• a main shaft rotatably mounted on a side plate, and
• a swinging member arranged on the main shaft, the side plate being provided with a limiting shaft for blocking the rotation of the swinging member, wherein
• a rotatable blocking member and an elastic member connected to the blocking member are arranged on the swinging member;
• the swinging member can drive the blocking member to rotate around the main shaft;
• the elastic member is used for driving a blocking portion of the blocking member to rotate toward the main shaft, so that the limiting shaft is located outside a path of the blocking portion which rotates around the main shaft;
• the operating mechanism is also provided with an impacting portion;
• the impacting portion is provided with two limiting portions arranged at intervals;
• the two limiting portions are respectively in limiting fit with the main shaft;
• when the blocking member rotates along with the swinging member and contacts the impacting member, the impacting member is used for pushing the blocking portion to overcome an acting force of the elastic member to rotate away from the main shaft, so that the limiting shaft is located on the path of the blocking portion which rotates around the main shaft;
• the main shaft is rotatably mounted on a bearing bush;
• the bearing bush is connected to the side plate through a connecting member;
• the impacting member is provided with a connecting hole designed to cooperate with the connecting member;
• and
• the impacting member, the bearing bush and the side plate are fixed through the connecting member.