108results about "Artificial hands" patented technology

A method of monitoring a device that includes a soft pneumatic actuator and a gas pump, the soft pneumatic actuator configured to actuate, assist and / or resist a movement of a body part. The method includes measuring the pressure of a fluid in the internal chamber of the soft pneumatic actuator. The pressure measurement or measurements is / are used to estimate anyone or any combination of: the volume of the internal chamber; the three-dimensional position, shape, and / or displacement of the soft pneumatic actuator; and the force delivered by the soft pneumatic actuator.

Method for setting up a myoelectric-controlled prosthesis system with a prosthesis shaft (20) and a plurality of pick-up electrodes (10) for detecting electrical muscle activities, said method having the steps of: placing a surface electrode arrangement (200) with a plurality of surface electrodes (100) about the circumference of a limb stump (1), detecting electrical muscle activity at muscles of the limb stump (1) as electromyographic signals through the surface electrodes (100), evaluating the myoelectric signals in terms of their signal differentiation, selecting the control method, by which the prosthesis system is controlled, on the basis of the evaluation of the signal differentiation, and fastening the pick-up electrodes (10) to the prosthesis shaft (20).

This utility model relates to a hand with a gripping thumb, aiming to solve the problems of existing prosthetic hands, such as limited functionality, complex structure, difficult maintenance, non-removable components, and excessive weight. The hand with a gripping thumb includes a palm shell, a thumb mechanism, a return spring, and a control cable. The palm shell is a hollow structure with an internal hinge seat and a long slot. The thumb mechanism consists of a thumb head, a hinge shaft, and a drive arm, and is installed inside the palm shell. The return spring connects the drive arm and the fixed seat, and the control cable connects to the drive arm and extends from the wrist, achieving the swinging gripping of the thumb head through its reaction with the return spring. This utility model has a simple structure, few parts, low cost, and is easy to maintain. The palm cover of the palm shell is removable, facilitating repair and replacement, and reducing maintenance costs. The overall design is lightweight, reducing the burden on patients and providing a practical, economical, and reliable solution for amputees, meeting their diverse daily needs.

A method for designing a functional prosthesis of customized hand, for patients amputated at trans-radial level, implemented with additive manufacturing technology. The method flow for designing and developing the devices consists of the following steps: i) kinematic analysis and 3D scan of the limb contralateral to the amputated one; ii) kinematic synthesis of the planar mechanism at one active degree of freedom (GdL), modular for each finger, and optimization of the same through a global performance index (GPI); iii) prototyping of the assembly of five fingers.

Provided is an electronic prosthetic hand that detects and operates hand movements. The electronic prosthetic hand may include a prosthetic hand including a finger unit capable of joint movement and a control unit that controls the finger unit, a first sensor module positioned on a user's finger, a second sensor module positioned on the back of the user's hand, and a gyro sensor provided in each of the first and second sensor modules to measure displacement according to a change in the positions of the first and second sensor modules. The electronic prosthetic hand can be used more precisely because the first and second sensor modules detect the movements of the user's finger and back of the hand, respectively, and implement joint movements of the finger unit based on the displacement difference values according to the movements of the finger and back of the hand.

A robotic lower arm assembly includes a forearm member, a hand member including a plurality of appendage members, a plurality of control cables coupled with the forearm member at first ends thereof and coupled with the plurality of appendage members at second ends thereof, a control cable of the plurality of control cables configured to apply a force to an appendage member of the plurality of appendage members to actuate the appendage member, and a wrist joint pivotably coupled with the forearm member and the hand member. The plurality of control cables is arranged in a first configuration at a forearm side of the wrist joint and is arranged in a second configuration different from the first configuration at a hand side of the wrist joint opposite the forearm side.

The invention provides an artificial hand slippage sensing and self-adaptive control method based on deep learning. The method comprises the following steps: S1, acquiring data of a multi-source sensor; s2, preprocessing off-line data; s3, constructing and training a deep learning slip perception model; s4, collecting real-time data in the artificial hand grabbing process; s5, carrying out real-time data preprocessing; s6, real-time slip sensing based on a deep learning model; s7, generating a self-adaptive control decision; s8, executing the control instruction; and S9, slip state feedback verification and closed-loop adjustment are carried out. Through the design of off-line training, real-time reasoning and closed-loop feedback, the problems that a traditional artificial hand is poor in adaptability to complex scenes and not timely in sliding response are effectively solved, the method can be widely applied to the fields of artificial limbs, industrial grabbing robots and the like, and more stable and natural grabbing experience is provided for users.

In accordance with at least one aspect of this disclosure, a prosthetic includes a first portion extending along an axis configured to receive and partially surround a residual limb of a user. A second portion is moveably connected to the first portion, wherein the first portion and the second portion come together to define an interior space for supporting the prosthetic appendance on the residual limb of the user. A sensor is disposed on an inner surface of the first portion and within the interior space. A controller is operatively connected to the sensor to receive a first pressure signal from the sensor indicative of a pressure of the residual limb on the inner surface of the first portion. The controller is configured to adjust the second portion relative to the first portion based on the pressure signal received from the sensor to expand or retract a volume of the interior space of the first portion to accommodate radial growth and shrinkage of the residual limb relative to the axis.

Anthropomorphic robotic hand comprising a frame (00); four aligned fingers and a relative actuation mechanism to make them rotate with respect to said frame (00); a metacarpus (10), fastened to said frame (00) so to be able to rotate and translate along the axis (180) of a cylindrical joint; a thumb (11) fastened to said metacarpus (10) so to be able to rotate along the axis (140) of a rotoidal joint; an actuation mechanism of said thumb (11) and said metacarpus (10), characterized in that the actuation mechanism of said thumb and said metacarpus comprises : a first sub-mechanism activated by a first motor (M2) integral to said thumb (11) and configured to move, by means of a worm screw (R2), a ring gear (T2) fastened so to mesh with respective teeth provided on said metacarpus (10), so that a rotation of said proximal phalanx to said metacarpus corresponds to a rotation of said ring (T2), a second sub- mechanism actuated by a second motor (M3), integral to said frame (00) and configured to move, by means of a worm screw (R3), a ring (T3) that is configured to make said metacarpus (10) rotate to said axis (180) of said cylindrical joint, by means of a clutch (C1 ).

A rotatable and detachable wrist joint for a prosthetic hand is provided. The prosthetic joint includes a first ball race portion and a second ball race portion, and by moving the first ball race portion and the second ball race portion together or apart, the ball bearing is constrained in the inner zone or the outer zone, and the prosthetic joint can be fixed to or detached from the socket joint. The socket joint includes a socket body that houses the wrist joint. The wrist joint has a rotating connector core extending from the socket body and configured to follow the socket body.

The invention provides a multi-modal feedback bionic hand and a control method thereof, and relates to the technical field of bionic hands, the multi-modal feedback bionic hand comprises a skeleton structure layer, a driving execution layer, a bionic skin layer, a sensing monitoring layer and a processing module; the skeleton structure layer comprises a metacarpal bone and at least one phalanx; the driving execution layer comprises at least one phalanx driving unit, and each phalanx driving unit comprises a driving wire and a shape memory alloy spring; the bionic skin layer is used for wrapping the skeleton structure layer and the driving execution layer; the sensing monitoring layer comprises angle sensing units and fiber bragg grating sensing units, the angle sensing units are arranged at all joints of the phalanges, and the fiber bragg grating sensing units are arranged in the bionic skin layer; and the processing module is used for receiving the multi-mode sensing signal output by the sensing monitoring layer and controlling the driving signal output to the driving execution layer according to the multi-mode sensing signal. The bionic hand has high response speed and motion stability.

A prosthetic assembly includes a socket and a liner. The socket includes a first interlocking feature and defines an inner volume. The liner includes a second interlocking feature. The first interlocking feature and the second interlocking feature are configured to engage each other when the liner is inserted into the inner volume of the socket. The liner is configured to receive a distal limb of a patient. At least one of the socket or the liner include inner voids extending within walls of the socket or the liner.

Disclosed is a magnetic prosthetic suspension system. The system includes a magnetic implant configured to be fixedly attached to bone at a target site of a subject, a socket configured to fit over the target site of the subject, and a magnet positioned on or within the socket, where the magnet is configured to generate a magnetic attractive force between the magnetic implant and the magnet that suspends the socket at the target site of the subject.

The invention relates to a prosthetic wrist joint with a base (10) for attachment to a proximal prosthetic component and a pivoting part (20) which is pivotably mounted on the base (10) about a pivot axis (30), with at least one fastening device (21) for fixing a distal prosthetic component or prosthetic hand to the pivoting part (20), wherein at least one locking segment (22) with positive locking elements (23) arranged thereon is arranged on the pivoting part (20), and wherein at least one locking element (40) is mounted on the base (10) so as to be longitudinally displaceable along the pivot axis (30), which can be moved from a locked position, in which the locking element (40) is in engagement with a positive locking element (23) of the locking segment (22), to a release position against a spring force, wherein the locking element (40) has two release areas (41, 42) with which a first and a second release position are defined. is realized,The first release area (41) is arranged at a distance in the direction of displacement from the second release area (42), and a locking element (50) is assigned to the second release area (42) which holds the locking element (40) in the second release position, wherein the pivot part (20) is pivotably mounted on the base (10) against a spring force and is held in a starting position by at least one spring component (80) acting in opposite directions, wherein the spring component (80) is arranged at a stop (288) and the abutment (18) can be moved away from the stop (288) out of engagement with the spring component (80).

The invention discloses a body feeling myoelectricity artificial hand system fusing myoelectricity enhanced decoding and bionic electrical stimulation feedback. The system comprises a myoelectricity bracelet, a main controller, an electrical stimulator and an artificial hand. According to the system, an electromyographic bracelet is used for collecting residual limb side electromyographic signals, a main controller removes electrical stimulation artifacts in the signals in real time through a comb filtering and self-adaptive filtering series algorithm, gesture intentions are recognized online through a self-updating multi-class LDA algorithm, and the prosthetic hand is driven to execute corresponding actions. According to the system, a closed-loop feedback mechanism based on a muscle shuttle sensing model is constructed, the muscle shuttle sensing model simulates neural coding characteristics of a human body muscle shuttle, the real-time stroke of a micro servo electric cylinder of the prosthetic hand and stress information of a torque sensor are mapped into electrical stimulation frequency and voltage parameters respectively, and an electrical stimulator is controlled to apply bionic stimulation to the stump. According to the invention, closed-loop control of myoelectricity intention recognition, artificial limb action execution, state detection and electrical stimulation feedback is realized, the problems of lack of sensory feedback, serious electrical stimulation signal interference and the like of the existing myoelectricity artificial limb are effectively solved, a patient is helped to reconstruct ontology perception, and the accuracy and naturalness of artificial limb control are improved.

In a joint movement device for selective flexion and extension of a joint, a tendon is disposed adjacent to the first and second joint members. A tendon securing device is secured to the second joint member, the tendon being secured to the tendon securing device. At least one phalange ring is secured to a joint member and includes a tending routing mechanism configured to route the tendon through the phalange ring. An actuator is coupled to the tendon and pulls the tendon inwardly to cause the joint to flex. An elastic member is coupled to the phalange ring and tendon securing device and applies an extension force thereto, thereby causing the joint to extend when the actuator releases the tendon.

The invention relates to a prosthetic system comprising a prosthetic socket (20) that can be attached to a limb stump (1), and several recording electrodes (10) for detecting electrical muscle activity, a control unit connected to the recording electrodes (10), and a driven prosthetic component (2) that is attached to the prosthetic socket (20) and coupled to the control unit (80), with a surface electrode arrangement (200) having several surface electrodes (100) that can be attached around the circumference of a limb stump (1), wherein the surface electrode arrangement (200) can be slidably and / or rotatably arranged on the limb stump (1), wherein the surface electrodes (100) and / or recording electrodes (10) are designed as a dome screw (15) with a dome nut (14) and are screwed to the surface electrode arrangement (200) or the prosthetic socket (20). are.

This invention relates to the field of exoskeletons and specifically discloses a passive assist arm and a wearable device, which includes a main support, a rotating swing arm, and an elastic member. The main support, as the main structure, is connected to the waist and shoulder of the human body, respectively, and supports the entire assist arm structure. The rotating swing arm is movably connected to the main support and swings synchronously with the wearer's arm. The elastic member is provided within the main support and connected to the rotating swing arm. The elastic member contracts and pulls the rotating swing arm, causing it to rotate away from the waist of the human body, thereby providing an assist force. A tension member is also connected to the elastic member, and a lock base is provided on the main support for locking the tension member. By pulling and locking the tension member, the magnitude of the elastic force of the elastic member can be adjusted and held, thereby enabling adjustment of the assist force. This invention has the advantages of adjustable assist force, a simple and stable structure, and low implementation costs.

The invention discloses a variable-rigidity soft prosthetic hand and a using method thereof, and the variable-rigidity soft prosthetic hand comprises a soft simulated hand mechanical body which comprises a rigid-flexible coupling bionic finger group module and a palm module; the rigid-flexible coupling bionic finger set module comprises at least two fingers, and each finger is sequentially provided with a movement cavity and a rigid cavity in the direction from the hand back to the palm. The motion chamber is provided with a corrugated structure and is used for driving fingers to bend; the fiber reinforced layer covers the outer wall surface of the stiffness chamber and is used for adjusting the stiffness of the finger and generating a first direction thrust; one end of the palm module is connected with the rigid-flexible coupling bionic finger group module, and the other end is connected with a limb of a patient; and the pneumatic driving control system is packaged in an inner cavity of the palm module and is connected with an air path in the rigid-flexible coupling bionic finger group module. According to the scheme, the problems that an existing artificial limb is heavy, low in load capacity, high in reset delay and inconvenient to maintain are solved.

Provided is a thermally actuated artificial muscle-based prosthetic finger, which comprises a prosthetic finger skeleton, a first artificial muscle (01) attached to a flexion side of the prosthetic finger skeleton, and a second artificial muscle (02) attached to an extension side of the prosthetic finger skeleton. The first artificial muscle (01) and the second artificial muscle (02) are made of unidirectionally actuated shape memory polyurethane. The prosthetic finger further comprises a heating mechanism configured to actuate the first artificial muscle (01) and the second artificial muscle (02). According to specific driving and transmission parameters required for a finger target action, the unidirectionally actuated shape memory polyurethane is selected as an artificial muscle material. A network structure composed of segments (hard segments and soft segments) is constructed. By adjusting and controlling the response temperature, degree of orientation, crystallinity, modulus, and microscopic driving force, a biomimetic match with the motion variables of the finger is achieved.

The present technology is generally directed to a prosthetic digit usable with capacitive panels. The digit includes a proximal body removably couplable to a residuum of a user, an intermediate body pivotably coupled to the proximal body via a first fastener, a distal body pivotably coupled to the intermediate body via a second fastener, a first bearing capacitively coupled to the first fastener, and a second bearing capacitively coupled to the second fastener. The digit further includes a first conductive epoxy portion coupled between the first and second bearings, and a second conductive epoxy portion coupled between the second fastener and the distal body. The first and second conductive epoxy portions provide a low impedance, capacitive coupling pathway between the capacitive panel and the residuum of the user.

The invention relates to an orthopedic joint device having an upper part and a lower part which is hinged about a pivot axis to said upper part, having a flexion moment-controlled retainer device that is positioned between the upper part and the lower part, blocks a flexion and releases the flexion when a predefined flexion moment is exceeded, wherein a control element is associated with the retainer device and is coupled to a delaying element.

The invention relates to a prosthetic system comprising a prosthetic socket (20) that can be attached to a limb stump (1), and several recording electrodes (10) for detecting electrical muscle activity, a control unit connected to the recording electrodes (10), and a driven prosthetic component (2) that is attached to the prosthetic socket (20) and coupled to the control unit (80), with a surface electrode arrangement (200) having several surface electrodes (100) that can be attached around the circumference of a limb stump (1), wherein the surface electrode arrangement (200) can be slidably and / or rotatably arranged on the limb stump (1), wherein the surface electrodes (100) and / or recording electrodes (10) are designed as a dome screw (15) with a dome nut (14) and are screwed to the surface electrode arrangement (200) or the prosthetic socket (20). are.

Provided are a robotic hand system and a method for controlling a robotic hand. A robotic hand system operated by a user according to an example embodiment, the robotic hand system may include a robotic hand configured to grip a target object, a first sensor unit disposed on the robotic hand, the first sensor unit configured to detect a real-time posture of the robotic hand, a second sensor unit disposed on the robotic hand, the second sensor unit configured to detect three-dimensional surface information of the target object that appears based on the robotic hand, and a processor configured to infer, based on sensing information of the first sensor unit and the second sensor unit, a motion of the robotic hand conforming to an intention of the user, and operate the robotic hand according to the inferred motion. The robotic hand may include a finger module including a plurality of frames, and one or more joint portions connected to the plurality of frames, the one or more joint portions configured to change positions of the plurality of frames.

A gear set comprising an input shaft, an output shaft, a gear; and a friction pad. In a first configuration, the gear set has a first gear ratio for the input shaft rotational speed to the output shaft rotational speed equal to N:1, where N is not equal to 1. In the first configuration, the gear rotates relative to the friction pad. In a second configuration, the gear set has a gear ratio for the input shaft rotational speed to the output shaft rotational speed equal to 1:1, wherein the friction pad prevents rotation of the gear relative to the friction pad.

A robotic lower arm assembly includes a forearm member; a hand member, the hand member including a plurality of appendage members; a plurality of control cables, the plurality of control cables coupled at a first end to the forearm member and coupled at a second end to the plurality of appendage members, one of the plurality of control cables configured to apply a force to an appendage member of the plurality of appendage members to actuate the appendage member; and a wrist joint pivotably coupled to the forearm member and the hand member. The plurality of control cables are arranged in a first configuration on a forearm side of the wrist joint and arranged in a second configuration different from the first configuration on a hand side of the wrist joint opposite the forearm side.