Reciprocating Shaver Blade Guide Frame Assembly
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Solution Overview
Problem
Existing reciprocating electric shaver blade assembly processes face challenges in assembling outer members with low rigidity due to the spring urging force, leading to deformation and difficulty in assembly.
Innovation Solution
A new guide frame is introduced that allows for the coupling of the outer member and outer member frame independently, using coupling portions and spring receiving portions to support the inner member push-up springs, enabling assembly without applying spring urging force, and enhancing coupling strength and stability through integrated frame portions and varying wall arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer member is fixed to the outer member frame in a heat-sealed manner against spring urging force, then assembly rigidity is improved, but assembly difficulty increases for low rigidity outer members due to deformation
Solution Approach 1:
The guide frame is assembled to the holding frame before the outer member block is installed, establishing the spring support structure in advance. This preliminary action allows the outer member to be assembled without bearing the spring urging force, preventing deformation while maintaining assembly rigidity
Solution Approach 2:
The assembly process is divided into separate stages: first assembling the guide frame with the holding frame, then separately assembling the outer member block. This segmentation allows each component to be prepared independently without the interfering spring force, resolving the contradiction between rigidity and assembly ease
2Strength
If the outer member with low rigidity is assembled against spring urging force, then coupling strength is improved, but the outer member deforms
Solution Approach 1:
The guide frame is pre-assembled to the holding frame, establishing the spring support structure before the outer member block is installed. This ensures the outer member can be coupled with sufficient strength without deforming under spring urging force
Solution Approach 2:
The guide frame acts as an intermediary structure that supports the spring receiving portions separately from the outer member. This intermediary framework allows the spring force to be applied to the guide frame rather than directly to the outer member, preventing deformation while maintaining coupling strength
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for easy assembly of outer members with low rigidity without deformation, improving coupling strength and stability, and preventing beard pulling by covering gaps and discharging beard waste effectively.
Implementation Method 1
inner member push-up springs 5 which press the inner member 3 toward an inner surface of the outer member 1
Data Source
AI summary
A blade of a reciprocating electric shaver includes a newly provided guide frame freely detachably held on a holding frame provided on a shaver body, in which, in the guide frame, there are provided: coupling portions to which an outer edge frame that fixes an outer edge thereto is coupled; and spring receiving portions which support lower ends of inner edge push-up springs.