9 results about "Interphalangeal Joint" patented technology

A hand covering with a mitten shell, a thumb portion extending laterally from the mitten shell, and abbreviated index, middle, ring, and pinkie finger fingertip segments configured to receive only the distal phalanx portions of the index, middle, ring, and pinkie fingers of the hand, respectively. Each fingertip segment has a distal end portion and a tubular peripheral wall that define an inner volume configured to receive only the distal phalanx portion the respective finger up to the distal interphalangeal joint. The inner volumes of the fingertip segments have lengths comprising a distance DD that are at least 20% but not more than 35% of a distance DT for the respective fingertip segment wherein the distance DT for each fingertip segment extends from the distal end of the inner volume to a line traveling laterally across the hand covering crossing a junction where the thumb portion meets the mitten shell.

A kind of double-degree-of-freedom underactuated robot thumb based on linear slide rod mechanism relates to intelligent robot technical field.Base joint frame, proximal phalanx frame and distal phalanx frame are connected by metacarpophalangeal joint and interphalangeal joint to form base structure, two drivers are connected transmission screw lever at bottom, transmission link is Y-shaped structural member, two branch arms of which are hinged to the bottom end of distal phalanx frame, the main arm is provided with slide hole and slide rod to form sliding pair, the bottom end is supported by spring, the bottom end of slide rod is hinged to metacarpophalangeal joint, screw nut and screw lever are arranged on the both sides of the bottom end of transmission link to form ball screw pair, position sensor collects distal phalanx frame position signal, and magnet steel and hall sensor measure proximal phalanx frame position signal.Two degrees of freedom motion is realized by using parallel structure, stable and flexible adaptive enveloping grasping of object is realized, the overall structure is simple and efficient, and has the advantages of high integration, high power density, fast response speed and accurate measurement.

A dexterous hand, including a hand module, the hand module includes one or more finger units and a palm unit, wherein each finger unit includes a plurality of phalanges and one or more interphalangeal joints, wherein the palm unit includes a carpometacarpal base, one or more metacarpals, one or more carpometacarpal joints, and one or more metacarpophalangeal joint, wherein each finger unit is hinged to a respective metacarpal by a respective metacarpophalangeal joint, wherein each metacarpal is respectively connected to the carpometacarpal base, wherein each interphalangeal joint has degrees of freedom of flexion extension, wherein each metacarpophalangeal joint has degrees of freedom of flexion extension, degrees of freedom of abduction adduction and degrees of freedom of circumduction, wherein each interphalangeal joint's degrees of freedom of flexion extension, each metacarpophalangeal joint's degrees of freedom of flexion extension, each metacarpophalangeal joint's degrees of freedom of abduction adduction are driven by different actuators.

The application relates to an integrated 3D printing dexterous finger and a kinematic modeling method thereof, wherein the integrated 3D printing dexterous finger comprises a finger base, a metacarpophalangeal roll joint, a first proximal phalanx, a metacarpophalangeal pitch joint, a second proximal phalanx, a proximal interphalangeal joint, a middle phalanx, a distal interphalangeal joint and a distal phalanx which are connected in sequence; and further comprises a proximal interphalangeal joint driving tendon, a first metacarpophalangeal joint driving tendon, a second metacarpophalangeal joint driving tendon and a variable cross-section passive coupling tendon. The integrated 3D printing dexterous finger can realize bidirectional driving of the finger by using a single driving tendon without complex assembly, and can overcome the friction and relaxation problems of 3D printing flexible materials through special structure design, so as to meet the efficient, lightweight and high reliability requirements of robot grasping.

Sole structure for a shoe, comprising a midsole formed from a soft elastic material, the upper of which serves as a sole support surface for the foot of a shoe wearer, and an outsole formed from an elastic material harder than the material of the midsole, the underside of which serves as a floor surface, wherein the sole structure comprises: a thin plate formed from an elastic material having a higher modulus of elasticity than the material of the midsole, and which is arranged on an underside of the midsole above the outsole;and a shock-absorbing body formed from a soft elastic material, arranged on the upper side of the outsole in such a way that it rests against an underside of the plate at least in a rearfoot area of ​​the shoe, the plate extending in a longitudinal direction from a point corresponding to the heel bone of the foot of the shoe wearer at least to a point corresponding to the first interphalangeal joint of the foot, arranged in the rearfoot area of ​​the shoe between the midsole and the shock-absorbing body, arranged in a forefoot area of ​​the shoe between the midsole and the outsole and designed such that at least one section of the plate serves as an exposed section in which an underside of the plate is exposed in a midfoot area of ​​the shoe at a point above the ground surface.

This utility model relates to a visual simulation training platform for suturing extensor tendons. Its overall shape is a human hand model, including fingers, palm, and wrist. It also includes: a simulated skin layer mounted on the outer surface of the hand model; slots on the back of the hand side of the fingers; a bone layer mounted in the slots of the fingers to simulate the five digits of the human hand; a circular damping shaft at the finger joints of the bone layer, through which the finger joints rotate; and a tendon mounted in the slots of the fingers on the surface of the bone layer. The tendon includes a fingertip segment and a root segment, with the fingertip segment connected to the fingertip and the root segment connected to a push-pull force sensor; a certain gap is left between the fingertip and root segments. The metacarpophalangeal joints flex and extend via the circular damping shafts, thereby simulating the process of regulating the tension of flexor and extensor muscles. Push-pull force sensors are used to monitor the tension received by the simulated tendons being sutured in real time.

This invention discloses a real-time piano playing posture correction system based on hand shape recognition, specifically in the field of music-assisted teaching technology. It addresses the problems of joint positioning loss and inaccurate dynamic force assessment under occlusion during playing. First, a primary contour is generated by fusing visual flow entities and reflection edges to construct a key mapping mesh. Then, inverse kinematics deduction is performed using skeletal proportion constraints to reconstruct the three-dimensional skeleton sequence under occlusion. Next, focusing on the key sinking time window, the vertical displacement gradient of the metacarpophalangeal joints and the rate of change of interphalangeal joint angles are compared to quantify joint motion values ​​and construct a force deformation feature vector. The extracted feature vectors are input into a standardized database for comparison, and posture error labels are parsed out. Finally, graphic and synchronous speech correction signals are generated at rests or long notes in the electronic score, constructing a closed-loop correction system that does not interrupt the playing rhythm, providing scientific support for piano posture-assisted teaching.