Elongated illuminant storage device

An elongated illuminant storage device, comprising:

• a reel rotatable about an axis thereof;
• a spiral spring energy storage member connected to the reel;
• an elongated illuminant having one end fixedly connected to the reel and the other end being a free end, wherein a portion of the elongated illuminant between the one end and the free end is capable of being wound around the reel, when a pulling force is applied to the free end, the elongated illuminant is capable of being pulled out, and the reel is driven to rotate forwardly, causing the spiral spring energy storage member to store a potential energy generated by rotation of the reel, and when the pulling force is removed, the spiral spring energy storage member releases the stored potential energy to cause the reel to rotate reversely;
• and
• a housing for accommodating the storage device, an electrical energy storage element and the elongated illuminant;
• wherein the reel is provided with a spiral guide groove for guiding the elongated illuminant to be wound and stored layer by layer in an axial direction of the reel, the spiral guide groove having a groove width adapted to a width or diameter of the elongated illuminant.