Product Form Evolutionary Design Integrated with TRIZ Contradiction Matrix

Table 5

Product ergonomic dimensions.

Part name	Size type	Size
Handheld head massager	Height	145 mm
	Length	100 mm
	Width	100 mm
Massager handle	Height	83 mm
	Cross-sectional thickness (at the handle)	20 mm
	Maximum fillet (handle section)	28°
	Width	40 mm
Adjustment switch for intensity	Length	18 mm
	Width	13 mm
Display light	Length	10 mm
	Width	4 mm
On/off button	Operational resistance	5 N
	Button depth	3 mm