Abstract:
A walking assistance device providing an assistance force to a user is provided. The device compensates for an influence of an inertial force of the device itself. An actuator drives leg joints such that a total sum of supporting forces acting on the leg links from a floor side is a target total lifting force. The total sum of supporting forces acting on leg links from a floor side in reaction to a vertical inertial force generated in the device due to a motion of the device and the gravity acting on the device is estimated as a force which compensates for the self weight of the device. The total sum of a target value of a lifting force to be applied to the user and the estimated value of the force which compensates for the self weight of the device is defined as a target total lifting force.
Abstract:
A walking assist device having a load transmit portion, a leg link connected to the load transmit portion, and a driving source capable of driving the leg link in a direction to raise a seat member, so that at least a partial weight of a user may be supported by the leg link through the load transmit portion. An electric component to be used for controlling the driving source can be mounted on the walking assist device without degrading the compactness of the walking assist device. At least a part of the leg link is constituted of a cylindrical link member in which at least the electric component, such as a motor driver to be used for the control of the driving source, is partially housed. The walking assist device also includes a heat transfer member for absorbing the heat of the electric component by the cylindrical link member. The heat transfer member is thermally connected to a side plate of the cylindrical link member directed toward the side opposite to the leg of the user.
Abstract:
A walking assistance device having a seating member (1) on which a user (P) can sit astride, and support members (2L, 2R) which support the seating member (1). The seating member (1) has a backward movement prevention section (1b) for preventing the seating member (1) from being displaced backward relative to the user (P) sitting on the seating member (1). The backward movement prevention section (1b) is constructed so as to be in contact with an inguinal part (Q) of the user (P). The arrangement restrains backward dislocation of the seating member (1) relative to the user (P), thus permitting improved stability when the user is seated.
Abstract:
A control device for a walking assistance device includes a seating section on which a user is seated, a pair of left and right foot sole installation sections fitted to the foot soles of the legs of the user, a pair of left and right leg links which connect the seating section to the foot sole installation sections, actuators which drive joints of the leg links, and an acting force detection means which detects force acting on the user from the seating section. The control device controls a driving force of at least one of the actuators according to the detected value of the acting force so that the force acting on the user is maintained at a least at a predetermined lower limit of upward force. Thus, desired user motions, such as jumping, can be performed while appropriate force acts on the user from the seating section.
Abstract:
A walking assistance device having a leg link connected to a load transmit portion via a first joint and to a foot attachment portion via a second joint, and having an intermediate third joint moving such that a distance between the first joint and the second joint is variable; a drive source for the third joint; and a battery for the drive source. When in an upstanding position, force in the forward-backward direction is prevented from acting on the load transmit portion to enhance stability. Also, a moment of inertia of the leg link is decreased to curtail a load applied to the leg of the user. The drive source and the battery are located at positions higher than the third joint, and when the user is in an upstanding position, a plane passing through the second joint lies between the drive source and the battery.
Abstract:
A walking assistance device having a seating member (1) on which a user (P) can sit astride, and support members (2L, 2R) which support the seating member (1). The seating member (1) has a backward movement prevention section (1b) for preventing the seating member (1) from being displaced backward relative to the user (P) sitting on the seating member (1). The backward movement prevention section (1b) is constructed so as to be in contact with an inguinal part (Q) of the user (P). The arrangement restrains backward dislocation of the seating member (1) relative to the user (P), thus permitting improved stability when the user is seated.
Abstract:
A control device for a walking assistance device includes a seating section on which a user is seated, a pair of left and right foot sole installation sections fitted to the foot soles of the legs of the user, a pair of left and right leg links which connect the seating section to the foot sole installation sections, actuators which drive joints of the leg links, and an acting force detection means which detects force acting on the user from the seating section. The control device controls a driving force of at least one of the actuators according to the detected value of the acting force so that the force acting on the user is maintained at a least at a predetermined lower limit of upward force. Thus, desired user motions, such as jumping can be performed while appropriate force acts on the user from the seating section.
Abstract:
Target joint support moments of each leg are determined by estimating joint moments of the each leg necessary for the person A wearing a leg motion support orthosis (1) to make a motion independently and according to the estimated joint moments. Moreover, floor reaction forces for the support orthosis (1) to make a motion independently are estimated, and then estimated values of actual joint support moments actually applied from the support orthosis (1) to the joints of the each leg of the person (A) are found by using the estimated floor reaction forces and outputs of the force sensor (22) provided in a leg link portion (4) of the support orthosis (1). Torque generation units (15) and (16) of the support orthosis (1) are controlled in such a way that the estimated values of the actual joint support moments are coincident with the target joint support moments. Thereby, the leg motion of the person can be supported. Moreover, it effectively prevents forces other than the necessary forces to support the leg motion of the person from acting on the person and enables the person to make a leg motion with feeling as if the person were not wearing the leg motion support orthosis as fully as possible.
Abstract:
It is determined whether the motion state of legs 2, 2 is a one-leg supporting state or a two-leg supporting state, and a total floor reaction force is estimated based on a motion equation of the center of gravity of a bipedal movable body 1. If the motion state of legs 2, 2 is the one-leg supporting state, the estimated value of the total floor reaction force is used as an estimated value of the floor reaction force on the leg 2 which is landed. When the motion state changes to the two-leg supporting state, a vertical component of the floor reaction force on the rear leg is estimated from the MP height of the front leg based on a predetermined correlation between the MP height of the front leg and the vertical component of the floor reaction force on the leg.
Abstract:
In walking assistance device, a force detector (21) is provided between thigh retaining member (9) that directly retain the thigh of the user and a thigh support member (2) that is actuated by an actuator (TA1) provided in hip coupling portion. Thereby, the load acting on the hip coupling portion can be accurately detected, and the output of the force detector can be favorably used for the purpose of controlling the actuator so as to minimize the force that is applied to the thigh of the user. In particular, to the end of providing a suitably rigidity to the thigh retaining member so that the force produced by the actuator may be evenly applied to the entire thigh, and facilitating the effort required for the wearer to wear the walking assistance device, the thigh retaining member comprises a base portion (9a) connected to the thigh support member and two pairs of resilient arms (9b, 9c) extending laterally from either side of the base portion so that the thigh retaining member generally defines a shape of letter-C in plan view.