Product Form Evolutionary Design Integrated with TRIZ Contradiction Matrix

Table 4

Conflict transformation based on TRIZ.

Specific conflict	Corresponding 39 engineering parameters	General TRIZ problem
Solve one-handed operation M8 and normal single-hand reachable range N3	Single-hand operation-5. Coverage of moving objects; 12. Shape	Solve problems in 5 and 12
	Object reachable range-5. Coverage of moving object
Solve adjustment switch for intensity M13 and misoperation in finger reachable range N2	Adjustment switch position-33. Handle ability	Solve problems in 33
	Finger reachable range-33. Handle ability
Necessary massage duration M12 and massage duration should not be excessively long N4	Massage duration-15. Action duration of moving object	Solve problems in 15 and 19
	Massage duration-19. Moving object application