1029results about "Artificial legs" patented technology

Various aspects of this disclosure relate to a prosthetic cover comprising an array of sensors, which transmit signals to an array of electrodes in a liner that fits over a residual limb of an amputee. Different interactions with the prosthetic cover cause different activation of the electrodes to transmit electrical current through different areas of the residual limb and modulate neurons differently within the residual limb. Various aspects of this disclosure also relate to a prosthetic liner with a substrate that includes electrodes for transcutaneous electrical nerve stimulation and / or electronic muscle stimulation for a residual limb.

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.

Universal switch modules, universal switches, and methods of using the same are disclosed, including haptic confirmation of commands generated by the user, methods of preparing an individual to interface with an electronic device or software.

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 discloses an electro-hydrostatic active ankle joint artificial limb and a walking method, and relates to the technical field of artificial limb technologies and additive manufacturing. The electro-hydrostatic active ankle joint artificial limb comprises a motor pump, a hydraulic cylinder, a hydraulic manifold block, an energy accumulator set and an integrated topological sole; the motor pump, the hydraulic cylinder, the energy accumulator set and the integrated topological sole are all integrated on the hydraulic manifold block, the motor pump is used for charging energy to the energy accumulator set, the motor pump and the energy accumulator set are both used for being connected with the hydraulic cylinder, and the hydraulic cylinder is used for being connected with the integrated topological sole. According to the electro-hydrostatic active ankle joint artificial limb and the walking method, the motor pump, the hydraulic cylinder, the energy accumulator set and the integrated topological sole are all integrated on the hydraulic manifold block, and the overall size and weight are reduced.

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.

A prosthetic foot includes a base spring, a top spring assembly, a connector assembly, and a heel cushion. The top spring assembly includes first and second spring members, and first and second bond connections. The second spring member extends parallel with and spaced apart from the first spring member. The first bond connection is between distal ends of the first and second spring members, and the second bond connection is between a distal end of the second spring member and a top surface of the base spring. The top spring assembly has a first portion arranged horizontally, and a second portion arranged vertically. The connector is connected to a proximal end of the top spring assembly to connect the prosthetic foot to a lower limb prosthesis. The heel cushion is mounted to the base spring at a location spaced forward of a heel end of the base spring.

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.

Disclosed are embodiments of a volitional controller and prosthetic leg system comprising a volitional controller and a powered prosthetic leg. The volitional controller may be configured to control a powered knee joint and a powered ankle joint to enable a user to walk at different speeds and inclines. The orientation of the components of the powered prosthetic leg may be monitored continuously to enable the system to adapt to changes in the duration of the user's gait. The volitional controller may be configured to determine a target knee torque and a target ankle torque that may be based on the global shank orientation, a prosthetic knee velocity, and a prosthetic ankle velocity.

Disclosed are prosthetic systems comprising a powered knee upper leg 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 climb a set of stairs. The prosthetic system may be activated by the activation of an EMG signal source, such as the biceps femoris muscle of the upper leg. The volitional controller of the prosthetic system may be further configured to receive a ground state signal and / or an IMU signal to determine a target knee torque for operating the powered knee of the prosthesis.

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 a method for creating a digital model of a prosthetic socket for a user (2), wherein the method comprises the following steps: a. Positioning the user (2) on a saddle (6), wherein the saddle (6) has a shaped cushion (18) with a cover containing a plurality of objects, b. Applying or increasing a vacuum to the mold cushion (18), c. Removing the user (2) from the saddle (6) and d. Scanning at least the part of the saddle that has come into contact with the user (2).

At least partial function of a human limb is restored by surgically removing at least a portion of an injured or diseased human limb from a surgical site of an individual and transplanting a selected muscle into the remaining biological body of the individual, followed by contacting the transplanted selected muscle, or an associated nerve, with an electrode, to thereby control a device, such as a prosthetic limb, linked to the electrode. Simulating proprioceptive sensory feedback from a device includes mechanically linking at least one pair of agonist and antagonist muscles, wherein a nerve innervates each muscle, and supporting each pair with a support, whereby contraction of the agonist muscle of each pair will cause extension of the paired antagonist muscle. An electrode is implanted in a muscle of each pair and electrically connected to a motor controller of the device, thereby simulating proprioceptive sensory feedback from the device.

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.

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.

The utility model provides a bionic hydraulic artificial foot. The bionic hydraulic artificial foot comprises a damping cylinder; a connecting hole extending to the outside is formed in the position, below the cavity, of the cylinder body. The piston is arranged in the cavity and divides the cavity into an upper hydraulic cavity and a lower hydraulic cavity, the bottom of the piston is connected to a piston rod extending to penetrate through the connecting hole, and the end, located outside the cylinder body, of the piston rod is pivotally connected to the top of the adapter block; the plantar flexion throttle valve and the dorsal flexion throttle valve are arranged on the cylinder body and are respectively provided with an oil flow channel communicated with the upper hydraulic cavity and the lower hydraulic cavity; the extension block is arranged at the lower part of the cylinder body, is positioned behind the piston rod and protrudes outwards; the front side of the middle connecting seat is pivotally connected to the bottom of the adapter block, and the rear side of the middle connecting seat is pivotally connected to the bottom of the extension block; the rear end surface of the foot plate is connected to the middle connecting seat. According to the artificial foot provided by the utility model, the damping during plantar flexion and dorsal flexion can be adjusted, and better stability and comfort can be provided.

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.

The Peltier effect is combined with the shape memory material and the thermal expansion and cold contraction phenomenon, the bionic muscle is provided, the bionic muscle can move according to the command of an electric signal, the length of the bionic muscle can be stretched and contracted under the control of the electric signal, so that thrust or tension is provided for a moving part, the size can be infinitely small, and the bionic muscle is suitable for being used in the field of medical instruments. Movement is free of noise, control is flexible, convenience is provided for miniaturization, intellectualization and sensitization of equipment, the robot can act more naturally and smoothly, expressions are richer and more colorful, infinite possibility is provided for the broken limb reconstruction technology, and the robot can serve as a power element and can be used for bionic manufacturing, mechanical manufacturing and the like. The method is applied to the fields of intelligent manufacturing, high-end equipment manufacturing, robot expression muscle manufacturing, broken limb reconstruction and the like.

The invention provides a transmission ratio self-adaptive adjusting mechanism for a lightweight knee joint artificial limb. The transmission ratio self-adaptive adjusting mechanism comprises a rack module, the joint rotating module is arranged on the rack module, is used for driving a knee joint to rotate and comprises a small quadrangular frustum pyramid, a rotating piece and a joint rotating shaft with a spline sleeve; the gear transmission module is arranged on the rack module, is used for driving the joint rotating module and comprises a driving motor, a bevel gear transmission system, a three-stage gear transmission system and a worm and gear transmission assembly, and the driving motor drives a joint rotating shaft to rotate by driving the bevel gear transmission system or the three-stage gear transmission system; the switching module is arranged on the rack module and used for driving the spline sleeve to slide so as to switch the bevel gear transmission system and the three-stage gear transmission system, the switching module comprises a switching motor and a switching module transmission assembly, the spline sleeve is sleeved with the switching module transmission assembly, and the switching module transmission assembly is driven by the switching motor to slide so as to switch the bevel gear transmission system and the three-stage gear transmission system. Therefore, the spline sleeve is driven to slide.

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.