An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

The present invention relates to a simple and unique attachable entertainment accessory which is attached onto a dumbbell and/or kettlebell, in order to provide an enjoyable and amusing way of exercising, wherein the attachable entertainment accessory comprises: a housing unit formed of a transparent top part and a base part, a plurality of holes or cavities provided on the base part to accommodate a plurality of inner pieces, and a peel-off sticker to secure attachment with the dumbbell and/or kettlebell. The plurality of holes or cavities and the plurality of inner pieces form a mini game. The main purpose of the present invention is to provide an exciting and pleasurable way of weightlifting by assisting a user in dull repetitive movements via the accompanying accessory attachment.

A sensing base for an adjustable free weight may include a cradle, and a sensing assembly, which includes a plurality of sensors and mechanical components (e.g., pivoting levers), each associated with a respective plate well that accommodates a weight plate of the adjustable free weight such that each mechanical component actuates the state of a respective sensor upon placement or removal of the weight in a plate well. Sensor signals reflecting the states of the sensors are communicated, via a circuit, a processor to determine the weight selection of the adjustable free weight when removed from the base. The sensing assembly may be implemented using individual sensors of a variety of different types such as hall effect sensors, optical interrupt sensors, IR optical sensors, and the like. The base may be configured to automatically communicate the determined weight to an external computing device to facilitate activity tracking and/or fitness coaching.

An adjustable dumbbell includes weight plates that are selectively connectable to a handle. Unselected weight plates are secured to a cradle. To secure the unselected weight plates to the cradle, a latch in the cradle is inserted into an engagement surface notch in the weight plate. The unselected weight plates are individually actuated based on which weight plates are selected and connected to the handle.

The present disclosure relates to a dumbbell, which includes a first grip rod and two counterweight assemblies, each of both ends of the first grip rod defines a first screw hole, each of the two counterweight assemblies comprises at least one first counterweight, the first counterweight comprises a first connection portion, the first connection portion is threadedly received in the first screw hole to connect the first grip rod with the first counterweight. The present disclosure further provides a fitness equipment applying the dumbbell.

A dumbbell has a left weight, a right weight, and an arched handle connected to the tops of the weights. In preferred embodiments, the bottoms of the weights are flat, the weights are at least as wide as they are tall, and the weights are parallel to each other. This configuration combines the advantages of a dumbbell and a kettlebell. The arched handle enables kettlebell-like arm raises, while the dumbbell configuration keeps the weights from pressing into the wrist. The arched handle also enables stable placement of the dumbbell over legs, knees, elbows, and ankles.

An adjustable dumbbell device includes a dumbbell having two weight ring supported on a receptacle, a handle having two end housings to be coupled to the weight rings, two weight members engageable into the housing, two spring biased catches engaged in the weight member, two arms coupled to the spring biased catches for moving the spring biased catches into and out of the weight members, a carrier slidably engaged in the receptacle and having a pole and a stud of different height for engaging with the arms and for actuating the arms to disengage the spring biased catches from the weight members, and an actuator moves the carrier relative to the receptacle to control an engagement of the pole and the stud with the arms.

The present invention discloses a weight adjustable dumbbell, which includes a dumbbell assembly, a dumbbell seat and a plurality of dumbbell pieces placed on two sides of the dumbbell seat, wherein the dumbbell assembly includes a handle tube, tailstock assemblies provided on two sides of the handle tube, a fixed shaft provided throughout inside the handle tube and the tailstock assembly and two telescopic tubes symmetrically sleeved outside the fixed shaft, wherein the handle tube is rotatably connected between the two tailstock assemblies, the handle tube is a hollow tube pieces, with an inner wall thereof being provided with two guide grooves with opposite screw directions, one end of the telescopic tube close to the center of the handle tube is provided with a guide block, and the other end thereof is symmetrically provided with an anti-rotation block, the tailstock assembly includes a tailstock body.

A monitoring system is disclosed for the regulation of the weight of a dumbbell, employable by a user for the execution of a gymnastic exercise, comprising a supporting frame, a dumbbell, placed on said supporting frame, equipped with a handle, having an axial development along an axis (R), capable of rotating around said axis (R), clockwise and counterclockwise, and equipped with a first end and a second end, a first plurality of weights, placed on said supporting frame, in which each weight is individually coupable to said first end by a first selection member, when said handle rotates one way, and detachable from said first end, when said handle rotates the opposite way, a second plurality of weights, placed on said supporting frame, in which each weight is individually coupable to said second end by a second selection member, when said handle rotates one way, and detachable from said second end, when said handle rotates the opposite way, said system comprising at least one detection device capable of detecting at least one physical phenomenon caused by the rotation of said handle to couple or detach one or more weights of said first and second plurality of weights to and from said handle.