现有膝关节助力器的若干问题及改进建议

Some Problems of Existing Knee Booster and Suggestions for Improvement

根据膝关节生物力学机理,分析了现有膝关节助力器五大问题:采用了一种固定的轴心连杆形式,无法考虑患者膝关节运动受伤的具体情况进行调节;无法考虑减少膝关节上下骨骼接触偏心影响和应力峰值;没有考虑对韧带保护措施,如施加预张力;无法考虑运动中韧带拉力的变化的应对措施;没有预警控制,不能及时控制肌体伤害。五项改进建议被提出:在上下助力杆间设置了反向偏心,使上下骨骼接触偏心和应力峰值减小;固定铰改为滑动铰,以便运动时方向和位置调节,使助力器在任何状态下都能有效作用;设置斜向拉力弹簧,以减少韧带受力;应用温度传感器,设置智能预警装置,能随时了解患者膝关节感觉程度,避免人体受伤;设有三轴加速度传感器和微处理器信号连接技术,可采用遥控技术来掌握运动情况及其影响。有关专利已被授权。

According to the biomechanical mechanism of knee joint,five problems of the existing knee joint booster are analyzed:1)adopted a fixed axis connecting rod form,cannot consider the patient's knee joint movement injury specific situation to adjust;2)cannot consider reducing the knee joint upper and lower bone contact eccentricity and stress peak;3)does not consider the ligament protection measures,such as the application of pretension;4)cannot consider the changes of ligament tension in the movement of the response measures;5)no early warning control,it cannot control body injury in time.Five recommendations for improvement were made:1)the reverse eccentricity is set between the upper and lower supporting rods,which reduces the contact eccentricity and stress peak of the upper and lower bones;2)fixed hinge is changed to sliding hinge in order to adjust the direction and position of motion so that the booster can function effectively in any state;3)setting oblique tension spring to reduce the ligament force;4)Using temperature sensors,and Installation of intelligent warning devices can always understand the degree of knee sensation,avoid human injury;5)With three-axis acceleration sensor and microprocessor signal connection technology,remote control technology is available to control movement and its effects.The patent has been authorized.