A strap may be removably attachable to a container. The strap may include a retractor having an opening, a retraction spring and a brake. The strap may further include a strip of flexible material attached to the retraction spring and extending through the opening of the retractor. The strap may also include clips attaching the retractor and distal end of the flexible material to the container. The strip of flexible material may move from a fully retracted position, where the distal end of the strip of flexible material is nearest the retractor, relative to the entire length of the strip of flexible material, to an extended position where the distal end of the strip of flexible material is furthest from the retractor. The retraction spring may bias the strip of flexible material into/toward the fully retracted position.

A winding mechanism includes a housing, an inner cylinder and a wire. The housing is formed with an accommodating space therein. An inner surface of the housing is formed with an internal thread structure. The inner cylinder is disposed in the accommodating space and defines a central axis. An outer surface of the inner cylinder is formed with an external thread structure. The external thread structure is cooperated with the internal thread structure. The inner cylinder is capable of displacing along the central axis by rotating relative to the housing. The external thread structure includes at least two contact portions and at least two non-contact portions, and gaps are formed between the non-contact portions of the external thread structure and the internal thread structure. An end of the wire is connected to the inner cylinder and is wound along the external thread structure of the inner cylinder.

A retractable pet leash comprises a shell with opposite ends, a rolling disc contained in the shell, a rope wound in the rolling disc, a locking button and a locking member; the shell is provided with a mounting hole; the locking button includes a mounting seat, a pulling member and a resetting member; the mounting seat is pivoted inside the shell; the mounting seat has a main body and a sliding slot passing through the main body; the pulling member is arranged on the mounting seat, a bottom of the pulling member passes through the sliding slot to connect the resetting member; the locking member is pivoted inside the shell and has a pivoting seat, a pivoting part, a locking part and the pressing part; the locking part cooperates with adjacent teeth of the rolling disc, the pressing part cooperates with the resetting part.

A portable interface system including an interface device, in particular a sensor device, and a base part, wherein the base part includes an attachment area for the interface device and a retraction device, wherein the retraction device is attached to the interface device and is designed to move the interface device into a predefined holding position in the attachment area, wherein the interface device is detachably fixed without tools in the holding position in the attachment area.

A retractable leash and collar/harness assembly. The assembly includes a flexible handle with a hub assembly in the forward end thereof. The hub assembly contains a spring member and leash line coiled and enclosed within the hub. The leash line is connected to a collar or harness and the handle and collar or harness include a connector thereon to allow the components to be nested each other and folded to provide a compact retractable leash and collar/harness assembly which is easily transportable by the user.

A wire-winding device comprising: an upper cover having a bottom surface and a slot deviating from a center of the bottom surface; a rotary base having an annular track on a top surface thereof, the annual track and the slot of the upper cover constituting an orbit; a spiral spring received in the rotary base; a transmission line winding around the rotary base; a lower cover assembled with the upper cover; and an elastic positioning element having a base and a positioning part extruding from the lower surface of the base, the base having an elastic part and a respective fixed part at each of two ends thereof, the elastic positioning element being moveable along the orbit in response to a rotational movement of the rotary base to avoid the transmission line to be tied a knot.

A charging apparatus for a handheld electronic device includes a housing configured to removably attach to the handheld electronic device. The housing includes at least one electronic logic board, and an accessory station configured to store and charge at least one accessory item of the handheld electronic device. The electronic logic board includes a coil configured to wirelessly provide or accept power to and from the handheld electronic device. A software installed on the electronic logic board is configured to control a power transfer between at least two of the following: the accessory item, the accessory station, the housing, and the handheld electronic device. The housing includes a magnetic material configured to removably attach to a corresponding magnetic material of the handheld electronic device.

A storage system includes a protective housing member configured to mate with a handheld electronic device. The protective housing member includes a charging area formed between a surface of the protective housing member and a surface of an accessory item of the handheld electronic device. The charging area is configured to charge the accessory item of the handheld electronic device. The charging area is powered by at last one power component of the protective housing member or at least one power component of the handheld electronic device. The storage system further includes at least one integrated circuit which is either a component of the handheld electronic device or a component of the protective housing member.

A storage system includes a protective housing member configured to mate with a handheld electronic device. The protective housing member includes a charging area formed between a surface of the protective housing member and a surface of an accessory item of the handheld electronic device. The charging area is configured to charge the accessory item of the handheld electronic device. The charging area is powered by at last one power component of the protective housing member or at least one power component of the handheld electronic device. The storage system further includes at least one integrated circuit which is either a component of the handheld electronic device or a component of the protective housing member.

A coating film transfer tool in which a rotational torque with the least variability may be generated without being affected by a surface state of a resilient body may include: a paying-out core having a coating film transfer tape wound thereon; and a rewinding core that rewinds the coating film transfer tape after use. The paying-out core and the rewinding core are interlocked via a power transmission mechanism in a case. The transmission mechanism generates a rotational torque by a frictional force on a sliding surface between components, by using a restoring force of a resilient body. The resilient body is configured to rotate integrally with a component A that comes into contact with one end of the resilient body and a component B that comes into contact with the other end.