A retractable cord reel assembly comprises a reel rotatably supported within a frame or housing for rotation about an axis; a biasing spring engaged with the reel; and a single unitary electrically conductive cord having a distal end portion affixed to the housing, and a movable proximal end, wherein the cord is wound about the reel in a plurality of contiguous segments. The cord reel comprises separate coaxial cord-take-up and cord-storage compartments, having, in an initial cord configuration, a fixed-length segment of cord wound in a spiral around a hub in the cord-take-up compartment, and a segment comprising helical windings of the cord in the cord-storage compartment. The cord reel assembly described herein can be used in modern electronic data and power transmission applications without the significant losses of signal integrity or power, commonly associated with conventional cord reel assemblies.

A wire-shaped body winding mechanism provided by the present invention includes multiple rotary shafts for winding a wire-shaped body, where a main shaft member serves as a revolution central shaft and two split shaft members serve as rotation central shafts. The wire-shaped body is wound on the split shaft members and thus can be coiled or released with rotation of the main shaft member. Relative movement between the split shaft members and the wire-shaped body is realized through rotation of the split shaft members, and thus the wire-shaped body can move smoothly.

A device for winding up and unwinding an elongated flexible element having a free end and a spatially fixed end. The elongated flexible element is divided over its length at least into a use portion and a compensation portion, wherein the use portion has the free end and the compensation portion has the spatially fixed end. The device includes a rotatable drum configured on its circumference to wind up and unwind at least the use portion in a first winding plane, wherein the end of the compensation portion is spatially fixed relative to the drum. The elongated flexible element in the transition from the use portion to the compensation portion is fixed at a fastening point to the drum, and when the drum is rotated the compensation portion is coiled up and uncoiled in the form of at least one looped portion in a second winding plane.

This invention concerns a line reeling device for reeling front and back lines of a kite. The device includes a reeling mechanism comprising a first reel and a second reel which are located in an enclosure and on which the front and back lines are, in use, wound respectively. The reels are arranged so that their rotation in one direction retracts the lines and their rotation in the other direction deploys the lines. The reeling mechanism further includes reel connecting means which is operable to cause the reels to rotate in harmony in one configuration and rotate independently in another configuration. The reeling mechanism also has a braking mechanism for controlling rotation of the reels and a control mechanism which is in connection with the braking mechanism. The control mechanism is operable between a first, locked position wherein rotation of the reels is obstructed and a second, released position wherein rotation of the reels is allowed.

A spring-driven reel is adapted to include a gear assembly, and a reel assembly operatively coupled to at least one gear of the gear assembly. The spring-driven reel can also include at least one spring assembly. The spring assembly can include a screw member and a non-rotatable nut moveably mounted to the screw member.

The cord reel device comprises a first reel body and a second reel body which are linked so that their rotational axes coincide; a pullout cord that is wound around the first reel body so that it can be pulled out; an internal cord that is wound around the second reel body in the same direction as the winding direction of the pullout cord; and a reel case that rotatably covers the first reel body and the second reel body and forms a winding space that allows free play of the internal cord. A convex portion that protrudes toward the rotational axis is provided to the reel case.

A reeling device for the controlled coiling and uncoiling of a cable has a first end that is fixed and a second end that is movable relative to the first end. The cable is unbroken between its first and second ends. The reeling device includes first and second reels about which the cable is coiled. The first and second reels are coaxial. The first reel is fixed against rotation and axial movement, and the second reel is rotatable about the axis with such rotation causing axial movement of the second reel relative to the first reel.

A transfer device for limiting a twisting of a link between an end of the fixed link with respect to a fixed part and an end of the fixed link with respect to a revolving part that can revolve with respect to the fixed part about an axis of rotation, the transfer device for a link includes a composite drum comprising a set of drums aligned on the axis of rotation about which the link can be wound, the set of drums comprising a fixed drum intended to be secured to the fixed part in rotation about the axis of rotation, a revolving drum intended to be able to revolve about the axis x with respect to the fixed part and a set of at least one loose drum interposed between the fixed drum and the revolving drum, each loose drum being free to rotate about the axis of rotation with respect to the revolving drum and the fixed drum and having a height on the axis.