基于坐立转换运动轨迹的如厕辅助装置设计

doi:10.3969/j.issn.1006-9771.2021.07.018

Abstract

Abstract:

Objective To design a toilet assistant device according with an ergonomics based on the natural sit-to-stand transition motion trajectory, to improve the safety and comfort for the older adults.

Methods The sit-to-stand transition motion trajectory was obtained at different speeds using Inertial Measurement Unit from twelve healthy subjects. The finite element contrastive pressures on toilet seat at 0°, 10°, 20°, 30°, 40° sitting inclination angles were compared from this trajectory to the other research trajectory, as well as the balance analysis after standing. A total of 20 healthy subjects experienced the toilet assistant device and reported their satisfaction.

Results At four angles of inclination, the average pressure of this trajectory was less than that of the other research; while the vertical projection of center of mass was within the range of center of pressure, satisfying the balance condition. Most of the subjects were satisfactory to the toilet assistant device.

Conclusion A new sit-to-stand transition motion trajectory has been obtained. A toilet assistant device based on the motion trajectory has been designed, which is comfortable and steady.

Key words: toilet assistant device, sitting-to-stand, motion trajectory, ergonomics, finite element analysis

CLC Number:

R496

LI Yuan-li,TU Xi-kai,HU Shi-chao,LI Xiao. A Design of Assistive Device for Toilet Based on Sitting-to-stand Motion Trajectory[J]. 《Chinese Journal of Rehabilitation Theory and Practice》, 2021, 27(7): 844-851.

Figures/Tables 13

References 35

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倾角(°)	高度1 (mm)	高度2 (mm)	足部压力1 (kg)	施加载荷1 (N)	足部压力2 (kg)	施加载荷2 (N)
0	0.0	0.0	13.6	522.34	13.6	522.34
10	57.5	43.7	15.8	503.25	20.2	450.71
20	135.0	104.1	20.1	439.78	25.6	380.33
30	232.5	181.3	28.9	329.00	36.7	256.30
40	350.0	275.0	44.1	168.53	50.8	120.86

零部件	尺寸(mm)
电动推杆极限长	1200
支架高度	320
上转动连杆	180
下转动连杆	225
升降连杆长	395

A Design of Assistive Device for Toilet Based on Sitting-to-stand Motion Trajectory

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