Reciprocating Shaver Driving Block Balance Adjustment
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Solution Overview
Problem
Conventional reciprocating electric shavers with multiple driving elements arranged side by side experience significant vibration due to moments about the rotational axis being directed in the same rotational direction when the driving elements are reciprocated in opposite phases.
Innovation Solution
The implementation of a reciprocating electric shaver design where each driving element is connected to a coupling member, forming a driving block with a balance adjustment portion on the opposite side of the rotation axis, allowing the driving blocks to be reciprocated in opposite phases to reduce vibration by canceling out moments about the rotation axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If two driving elements are reciprocated in opposite phases to reduce vibration in the reciprocating direction, then vibration of the driving elements in the reciprocating direction is reduced, but moments about the rotational axis of the rotary motor are directed in the same rotational direction causing great vibration during operation
Solution Approach 1:
A balancer is provided that reciprocates in phase opposite to the driving elements. The balancer generates counterbalancing moments about the rotational axis that oppose the moments generated by the driving elements, thereby reducing the net vibration during operation while maintaining the opposite-phase reciprocation of the driving elements for reduced reciprocating direction vibration.
2Productivity
If multiple driving elements are arranged side by side, then shaving coverage is improved, but vibration increases due to moments about the rotational axis being directed in the same rotational direction
Solution Approach 1:
The balancer acts as a counterweight mechanism that generates opposing moments to cancel the vibration-generating moments from multiple driving elements arranged side by side, enabling improved shaving coverage without excessive vibration.
Solution Approach 2:
The balancer is integrated with the existing driving element structure, combining the functions of multiple driving elements with the vibration compensation function in a unified mechanism, allowing simultaneous achievement of improved coverage and reduced vibration.
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 design effectively reduces vibration by setting the gravity centers of the driving blocks closer to the rotation axis, minimizing moments and enhancing the stability of the reciprocating electric shaver.
Implementation Method 1
the balancer is reciprocated in phase opposite to the driving element to reduce vibration of the driving element in the reciprocating direction
Implementation Method 2
each driving block includes a balance adjustment portion provided on the opposite side of a rotation axis of the rotary motor from the driving element included in the driving block
Data Source
AI summary
A reciprocating electric shaver 1 includes: a rotary motor 110; a pair of driving elements 130, 140 to which inner blades 54 are individually attached; and a conversion mechanism 180 coupled to the rotary motor 110 and the corresponding driving element 130, 140 to convert rotating motion of the rotary motor 110 to reciprocating motion of the pair of driving elements 130, 140. Each driving element 130, 140 and coupling members coupled to the driving elements 130, 140 constitute driving blocks 200, 210. The driving blocks 200, 210 include balance adjusters 150, 160 provided on the opposite sides of a rotation axis C of the rotary motor 110 from the driving elements 130, 140 included in the driving blocks 200, 210, respectively.