Slow retraction mechanism, locking-type slow retraction device and winding device

A slow retraction mechanism, wherein the slow retraction mechanism is configured to be adapted to a winder;

• the winder comprises a main shaft and a main body;
• the main body is rotatably sleeved on the main shaft;
• the main body is configured to rotate around the main shaft to wind or unwind a flexible material;
• the slow retraction mechanism comprises:
• a blocking part;
• a decelerating part;
• and
• a first elastic part;
• wherein the blocking part is fixedly connected with the main shaft;
• the decelerating part is rotatably arranged on the main body;
• a projection of the decelerating part along an axial direction of the main shaft falls within a projection of the blocking part along the axial direction of the main shaft;
• when the main body rotates around the main shaft in a first direction to wind the flexible material, the decelerating part is configured to rotate relative to the main body along a second direction opposite to the first direction to approach the blocking part;
• the decelerating part is also configured to be in contact with and rub against the blocking part to reduce a rotation speed of the main body in the first direction;
• and
• the first elastic part is arranged on the main body and connected to the decelerating part;
• and the first elastic part is configured to apply an elastic force on the decelerating part to hinder the decelerating part from rotating in the second direction.