809results about "Artificial legs" patented technology

The hydraulic damper comprises an oil storage container, a piston is arranged in the oil storage container, and the piston divides the oil storage container into a first oil cavity and a second oil cavity; a piston rod; one part of the first circulating oil way and one part of the second circulating oil way are shared with each other, and damping parts are arranged on the parts and used for applying damping force to the hydraulic oil flowing through the damping parts; at least one first valve is arranged on the first circulating oil way and used for limiting hydraulic oil in the first circulating oil way to only flow from the first oil cavity to the second oil cavity in a one-way mode; at least one second valve is arranged on the second circulation oil way and used for limiting the hydraulic oil in the second circulation oil way to only flow from the second oil cavity to the first oil cavity in a one-way mode. The two-way damping control device has the beneficial effects that under the condition that only one damping valve is used, two-way damping control can be achieved when the artificial limb moves, and the wearing comfort and attractiveness of the artificial limb are improved.

The invention belongs to the technical field of medical instruments, and discloses an intelligent artificial limb which is characterized in that a swing hydraulic cylinder is arranged at the bottom of a joint head, a shank support is connected with a rotating shaft of the swing hydraulic cylinder and can rotate around the rotating shaft, an output shaft of a motor is connected with a valve rod of a flow valve, and a valve element of the flow valve is connected with an oil way of the swing hydraulic cylinder; a rotating shaft of the angle sensor is connected with the rotating shaft; the hydraulic resistance is adjusted through a motor, and the performance of the intelligent artificial limb in the aspects of safety, flexibility and movement precision is remarkably improved through accurate sensor feedback and an intelligent control system. The invention further discloses a control method of the intelligent artificial limb, the controller calculates the dip angle value of the thigh according to the value of the angle signal and the value of the dip angle signal, and a plurality of walking modes are preset in the controller; according to the invention, the angle and inclination angle signals are collected in real time, and the hydraulic resistance of the knee joint is intelligently adjusted according to multiple preset walking modes, so that the walking experience and safety in different motion scenes are optimized.

Embodiments can relate to a prosthetic foot system. The system can include an ankle joint housing co-locating a rotation sub-assembly, a torsional shock absorbing sub-assembly, and a vertical shock absorbing sub-assembly. The system can include a foot component attached to the ankle joint housing. The system can be configured as a co-designed architecture to functionally integrate at least two functions of: (i) torsional shock absorption, (ii) multi-axial motion with stiffness modulation in single gait cycle, (iii) active dorsiflexion, and (iv) vertical shock absorption by causing the at least two functions to operate in concert.

The utility model discloses a tactile extremity structure and an artificial limb. The tactile extremity structure comprises a limb back structure; the limb abdomen structure is arranged on the limb back structure; the sensor is located between the limb back structure and the limb abdomen structure; the sensing target is arranged on the limb and abdomen structure; when the limb and abdomen structure deforms in a contact mode, the sensing target is driven to move and is sensed by the sensor. The sensor is located between the limb back structure and the limb belly structure, the sensing target is located on the limb belly structure and corresponds to the sensor in position, when the limb belly structure makes contact with other objects and deforms, the sensing target moves, the back sensor senses the movement, and therefore the limb end structure has touch sense and can sense contact. And the tactile extremity structure has a better simulation effect.

The invention belongs to the technical field of medical instruments, and discloses an AI knee joint which is characterized in that a second shaft is arranged on the rear portion of a joint head of the AI knee joint, a sliding block is hinged to the second shaft, a through threaded hole is formed in the sliding block, a third shaft is arranged in the middle of a shank support, a motor is hinged to the third shaft, an output shaft of the motor is connected with a lead screw, and the lead screw is in threaded connection with the sliding block; a toe pressure sensor is arranged on the front side of the shank support, and a heel pressure sensor is arranged on the rear side of the shank support. According to the AI knee joint control method, a plurality of walking modes are preset in a control module and comprise a flat ground mode, an upstep mode, a downstep mode, a sitting mode, a squatting mode and a getting-up mode. Through motor driving, pressure sensing and angle detection, the current state is judged, the walking mode is automatically switched, active flexion and extension control and intelligent gait adaptation are achieved, and the flexibility and stability of the artificial limb and the walking comfort of a user are improved.

The invention is suitable for the technical field of medical instruments, and provides a pneumatic global self-adaptive ankle-foot artificial limb which comprises a rear sole and a front sole which are connected through a front and rear foot connecting piece. The pressure response assemblies are located at the bottoms of the rear sole and the front sole, and pressure changes after bearing; and the ankle self-adaption assembly is connected with the pressure response assembly through a valve communication assembly and drives the ankle to do eversion, centering and introversion motions based on pressure changes. According to the embodiment of the invention, an ankle joint inward and outward turning automatic adjusting mechanism directly driven by plantar pressure change can enable the artificial limb to adapt to complex terrains such as uneven road surfaces and lateral slopes in real time, an inward and outward turning motion mode of a physiological ankle joint in the walking process is simulated, and the gait of a user is smoother and more natural; the pure pneumatic control structure is relatively simple and light, and an external power supply pressure driving pump or a complex sensor is not needed.

Prosthetic devices allow for full articulation of the joint, while absorbing impact of the components during normal use that will reduce wear on the device components and prolong life. The device may include a bone implantable component and a bearing component having an articulation surface that is sized and shaped to substantially mate with at least a portion of the bone implantable component and a damping mechanism that includes a contact member disposed at least primarily inside a cavity; a biasing member biasing the contact member toward an upper aperture of the cavity and means for capturing the contact member within the cavity.

The application discloses an electro-hydraulic active ankle prosthesis and a walking method, relates to the technical field of prostheses and additive manufacturing technology, and discloses an electro-hydraulic active ankle prosthesis, which comprises a motor pump, a hydraulic cylinder, a hydraulic integrated block, an accumulator group and an integrated topology instep, wherein the motor pump, the hydraulic cylinder, the accumulator group and the integrated topology instep are all integrated on the hydraulic integrated block, the motor pump is used for charging the accumulator group, the motor pump and the accumulator group are both used for being connected with the hydraulic cylinder, and the hydraulic cylinder is used for being connected with the integrated topology instep. The electro-hydraulic active ankle prosthesis and the walking method have the advantages that the motor pump, the hydraulic cylinder, the accumulator group and the integrated topology instep are all integrated on the hydraulic integrated block, so that the overall volume and weight are reduced.

The invention relates to a control method of an artificial limb knee joint. According to the technical scheme, the control method comprises the steps that a heel pressure sensor signal Ph, a sole pressure sensor signal Pf and an inclination angle theta and an angular velocity omega output by a shank inertial measurement unit are obtained in real time; when it is detected that the Pf decline rate exceeds a preset multiple threshold value of the heel pressure decline rate, dynamically calibrating an inclination angle reference theta base and calculating an offset theta cal; dividing six stages of a gait period based on the theta < cal > and the pressure signal, and calculating period duration T; a step speed-damping mapping knowledge base is constructed, and the damping opening degree in the early stage of swing is optimized through iterative learning; finally, the adjusted U value is applied in the early stage of swinging, and fixed damping is kept in other stages. The method is mainly used for improving the walking naturalness and terrain adaptability of the artificial limb at different speeds.

The invention relates to the technical field of active artificial limbs, in particular to a bionic artificial limb with a knee-ankle linkage function. Comprising a fixing frame, a receiving cavity is connected to the fixing frame, first air bags are arranged on the inner side of the receiving cavity at intervals, clamping blocks are connected to the first air bags at intervals, air escape valves are arranged on the first air bags, an air conveying mechanism is arranged on the fixing frame, and the air conveying mechanism is used for alternately conveying air into the different first air bags. The first air bags with the clamping blocks are combined with the air conveying mechanism, so that the first air bags can be alternately expanded and deflated, intermittent fixation and relaxation of limbs are achieved, blood circulation disorder caused by long-time continuous compression of a traditional rigid or semi-rigid receiving cavity is effectively avoided through the dynamic adjusting mode, and the medical treatment effect is improved. The probability of occurrence of complications such as skin irritation, redness and swelling and even pressure sores is remarkably reduced, and the wearing comfort and safety are improved.

Disclosed are prosthetic systems comprising a powered knee prosthesis and a volitional controller configured to provide control of the prosthesis to the user. The prosthetic system may be configured to enable a user to walk on smooth and / or uneven terrain and to ascend and / or descend stairs. The volitional controller may be configured in a contact state when the prosthesis is in contact with a ground surface and a no contact state when the prosthesis is lifted from the ground surface. When in the contact state, the controller may output a knee torque signal for controlling the powered knee of the prosthesis. The knee torque signal may be based on a target knee torque determined by the knee orientation and the torque measured at the ankle of a prosthetic foot. When in the no contact state, the controller may output a knee torque signal based on a desired knee position.

Aspects relate to a high-performance prosthetic attachment, the prosthetic attachment may include an articulating attachment with varying, adjustable ranges of motion, a limb connector coupled to the articulating attachment, a base connector coupled to the articulating attachment, and a base. Further embodiments of the high-performance prosthetic attachment may include at least an actuator mechanically connected to the articulating attachment and configured to adjust the range of motion of the articulating attachment, and at least a sensor, configured to detect attachment datum of a base. Lastly, further embodiments may include a control circuit, which may be communicatively connected to the prosthetic attachment and configured to receive attachment data and drive the actuator to adjust the range of motion available to the articulating attachment.

The invention provides a knee joint prosthesis and a lower limb prosthesis, and relates to the technical field of medical instruments. The knee joint prosthesis comprises a knee joint upper body, a knee joint lower body and a hydraulic rod; an offset rotating shaft is arranged on the knee joint upper body, one end of the hydraulic rod is pivoted in the knee joint lower body, and the other end of the hydraulic rod is pivoted with the offset rotating shaft, so that the knee joint upper body can drive the hydraulic rod to do telescopic motion when rotating relative to the knee joint lower body; the knee joint upper body is provided with a pivoting hole used for installing the pivoting shaft and a compression seam, the compression seam is located above the pivoting hole, the top of the knee joint upper body is provided with a connector used for being connected with the leg of a patient, and the knee joint upper body is provided with a first threaded connecting hole used for installing the connector. A locking hole is formed in the first threaded connecting hole, the locking hole penetrates through the compression seam to be communicated with the pivoting hole, a locking clamping column is arranged in the locking hole, and a locking piece used for limiting the locking clamping column is arranged at the top of the locking hole. The technical effect of improving the stability of the prosthesis is achieved.

A prosthetic ankle joint used with a prosthetic foot to allow for a non-linear spring to be used for energy absorption and return capacity. Specifically, the ankle joint comprises a main body that connects to the shank of a prosthetic foot using mounting bolts that further connects to a pyramid adaptor using a non-linear spring. The use of a non-linear spring as an attachment member allows for movement of the attachment point in relation to the foot while retaining the added benefits of a conical spring and the nonlinear compression it has. The non-linear spring of the present invention is preferably a progressive rate spring and is preferably conical but may other shapes that increase stiffness with deflection. The spring rate is determined by the weight of the patient and their activity level.

Non-backdriving rotation transmission mechanism includes an input shaft, an output shaft, a fixed casing having a cylindrical cavity that includes a cylindrical braking surface, at least one braking element connected to the input shaft and output shaft and adapted to interact with said braking surface, and mechanism for actuating the braking element from a non-braking condition to a braking condition.The braking element includes two brake pads articulated to each other and each having at least one braking contact zone adapted to interact with said braking surface, which brake pads are movable from an engagement position wherein the contact zones are remote from each other and are in contact with said braking surface, to a free position wherein the contact zones are close to each other and are not in contact with said braking surface.

The invention discloses a bionic ankle joint and an artificial limb, the bionic ankle joint comprises an ankle joint base and a sole mechanism, and the ankle joint base is used for being connected with a leg component; the sole mechanism comprises a front sole component, a rear sole component and at least one elastic piece, the rear sole component is rotationally connected with the ankle joint base, the front sole component is rotationally connected with the rear sole component, one end of the elastic piece is connected with the rear sole component, and the other end of the elastic piece is connected with the front sole component; the elastic component is used for providing elastic restoring force when the front sole component rotates relative to the rear sole component. The sole fitting degree is improved through multi-joint linkage, the gait stability is enhanced, the additional burden caused by uneven stress is avoided, energy recycling is achieved through the elastic piece, energy consumption is reduced, meanwhile, the pedaling effect is improved through elastic assistance in the pedaling stage, the motion characteristic of the bionic ankle joint is closer to the natural state of the human body, and the mechanical performance of the bionic ankle joint is improved. And the matching degree of equipment and human motion characteristics is improved.

A prosthetic ankle joint used with a prosthetic foot to allow for a non-linear spring to be used for energy absorption and return capacity. Specifically, the ankle joint comprises a main body that connects to the shank of a prosthetic foot using mounting bolts that further connects to a pyramid adaptor using guide pins and a non-linear spring. The use of a non-linear spring as an attachment member can also allow for a multiaxial movement of the attachment point in relation to the foot while retaining the added benefits of a conical spring and the nonlinear compression it has. The non-linear spring of the present invention is preferably a progressive rate spring and is preferably conical but may other shapes that increase stiffness with deflection. The spring rate is determined by the weight of the patient and their activity level. Complementary teeth are alternatively available to prevent rotation.

The present application relates to an intelligent knee joint for human lower limb exoskeleton, prosthesis, or orthosis. The intelligent knee joint reproduces part or all of the biomechanical characteristics of the human knee joint by adopting a motor drive unit in combination with a controllable spring energy storage unit based on a magnetorheological damper, or adopts a controllable resistance unit in combination with a controllable elastic energy storage unit based on a magnetorheological damper, thereby helping the wearer to better reduce the burden of walking and regain or repair the walking function. The motor drive unit operates in generator mode and driver mode, and the energy recovery technology is used to reduce the power consumption of the intelligent knee joint and extend the working time of the device. In addition, the use of a controllable elastic energy storage unit based on a magnetorheological damper further reduces the energy consumption of the intelligent knee joint, while also simplifying the control difficulty of the knee joint.

A prosthesis or orthosis comprising a hinge joint system for functionally assisting, enhancing, and / or replacing a hinge joint system of a human or animal subject, said hinge joint system comprising: a first member (10); a second member (20) being pivotally attached to the first member; a linkage element or an actuator (30) connected to the first member; a flexible member (40) connecting the second member and the linkage element or the actuator; at least one contact stiffening element (50) configured for being or entering in contact with the flexible member and for providing a lever action along a length of the flexible member.

A system, device, and method for generating gait state estimations for a user of a limb- assistive device. The method includes: training an encoder with a gait state decoder using annotated training data; training the encoder with a measurement decoder using target domain walking measurements; and determining a gait state estimation of the user through executing a neural network comprised of the encoder and the gait state decoder.

The knee joint linkage control ankle joint prosthesis comprises a base and a joint head, the base is connected with a foot plate piece, a hinge shaft is hinged to the base, the hinge shaft extends in the length direction perpendicular to the foot plate piece, the joint head is connected with a support, the supporting end of the support is connected with the hinge shaft, and a hinge piece is hinged to the support. The hinge piece is arranged close to the joint head and extends in the length direction perpendicular to the foot plate piece, a joint motor is hinged to the base, an output shaft of the joint motor is connected with a threaded rod, the threaded rod extends in the length direction perpendicular to the hinge piece, and the threaded rod is in threaded connection with a through hole in the hinge piece. A driving piece is connected between the shank piece and the thigh connecting piece, the shank piece is driven by the driving piece to rotate, and a controller on the shank piece is connected with the joint motor and the driving piece. The motion performance of the artificial limb is optimized through knee and ankle joint linkage control, proper supporting force and motion resistance are provided, the dynamic response capacity is improved, and therefore the walking stability and comfort of a patient are enhanced.

The invention relates to the technical field of medical instruments and robots, and discloses an active and passive knee joint artificial limb structure and a control and reinforcement learning parameter adjusting method.The active and passive knee joint artificial limb has various working mode combinations such as complete active, complete passive and active and passive combination and meanwhile has the extremely high exercise ability upper limit and cruising ability upper limit; the invention further discloses an active and passive knee joint artificial limb control method, an active mode or a passive mode is respectively entered in different stages of human body movement gaits, and more movement modes including walking, going up and down stairs, running and the like are met. The invention further discloses a reinforcement learning parameter adjusting method of the active and passive knee joint prosthesis, gait features of the uninjured side are used as a learning target, the motion of the prosthesis joint is matched with the uninjured side as much as possible by minimizing angle errors and phase deviation, and personalized efficient customization and continuous optimization of prosthesis control parameters are achieved.

The disclosed subject matter relates to a system and method for preparing a surface of a bone proximate a joint, in which the preparation includes boring a plurality of arced channels / troughs in the bone surface using an arch drill assembly guided by plural guide bores along a predetermined longitudinal arc. The bored troughs create a scalloped surface on the bone to which an inverse contoured joint insert / implant having cooperating convex ridges engages. The plural guide bores are also defined by the predetermined longitudinal arc which may be circular or helical. The disclosed subject matter minimizes bone removal and allows greater access options for preparing the bone surface.

A prosthetic attachment system and corresponding lock assembly are provided for connecting a distal end of a prosthetic liner to a distal end of a prosthetic socket, by combining vacuum suspension and mechanical suspension. An attachment pin extends from a distal end of the prosthetic liner. A connector assembly secures to a distal end of the prosthetic socket and is adapted for receiving and locking to the attachment pin. A lanyard assembly has a first end secured to the connector assembly and a second end extending outwardly from the distal end of the prosthetic socket and adapted to secure to an exterior surface of the prosthetic socket by an external securing system.

The present disclosure describes sensor devices that can be readily integrated with prosthetic devices to provide sensing of force and torque applied to the prosthetic device during use. The sensor device includes an adaptor section that readily connects to standard prosthetic components and a base section. The base section has a deflectable portion and a fixed portion. Cantilevers in the deflectable portion house magnets and corresponding Hall effect sensors are housed in the fixed portion. When axial and / or torsional forces are applied, the cantilevers deflect relative to the fixed section and the Hall effect sensors provide a corresponding output that correlates to the axial and / or torsional forces applied.

A surgical tool includes a handle and a trial section coupled to the handle by an engagement section. The trial section includes an upper surface and a lower surface. The upper surface has a shape that corresponds to an upper surface of an implant. The trial section defines a first slot extending from the upper surface to the lower surface and inwardly from a first side. A second slot extends from the upper surface to the lower surface and inwardly from a second side.

An assistive medical device includes a brace configured to fit around an anatomical joint of a user. One or more sensors, such as an inertial measurement unit and an angle sensor, determine pose (e.g., position and / or orientation) of the brace. A controller receives data from the sensors and compares the data from the sensors to a pose of the anatomical joint that is either measured (e.g., via separate limb pose sensors) or assumed (e.g., by instructing the user to assume a specific pose). Based on the comparison, an indication of the alignment status between the brace and the limb is determined to guide an alignment verification process.

The invention discloses an ankle joint and a control method thereof, an artificial leg and a robot. The ankle joint comprises a foot connecting structure; the leg connecting structure is rotationally connected with the foot connecting structure; the driving mechanism is arranged on the leg connecting structure and is connected with the foot connecting structure; the homing mechanism is connected with the driving mechanism; the driving mechanism is configured to drive the foot connecting structure to rotate in the front-back direction of the foot relative to the leg connecting structure; the homing mechanism is configured to return the foot connection structure to an initial position. In the walking process, the real feet rotate back and forth to present different postures. The foot connecting structure is driven by the driving mechanism to rotate front and back, the foot presents different postures in combination with the returning effect of the returning mechanism, the ankle joint is closer to the ankle joint of a real foot, and the bionic effect of the ankle joint and the foot is improved.

The invention relates to a modular prosthesis cover (1) for covering and / or protecting a prosthesis (10), comprising a knee portion (3) which covers a prosthetic knee joint (30) when the prosthesis cover (1) is applied. The knee portion (3) can be provided on a proximal cover portion (2) and / or a distal cover portion (4) and has proximal and distal end regions (32, 34) for coupling to at least one other cover portion (2, 4). The knee portion (3) also has a lattice structure (30) with polygonal openings (30) between the proximal and distal end regions (32, 34).

The invention relates to the technical field of intelligent prostheses, in particular to a method for controlling the stability of an intelligent lower limb prosthesis. Comprising a mounting seat, the adjusting mechanism is arranged on the lower side of the mounting base and comprises a foot mold, the foot mold is mounted at the bottom of the mounting base, and a through groove is formed in the foot mold; the toe board is elastically hinged in the through groove, and a torsion spring A is arranged between the toe board and the through groove. Through the design of the adjusting mechanism, when a wearer walks on a slope, the toe plate or the heel plate rotates with the joint of the foot mold as the circle center, flexible movement of the ankle joint of the intelligent artificial limb can be achieved, the gravity center of the body does not need to be deviated to the intelligent artificial limb, and the wearer does not need to completely lift the healthy lower limb; according to the technical scheme, the body stability of a wearer can be guaranteed, the wearer can walk on the slope at ease without worrying about falling down, the physical strength of the wearer is effectively saved, and the walking speed of the wearer is increased.