Elastic Fastener Razor Head Anti-Disengagement Design
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Solution Overview
Problem
Conventional manual razors experience reliability issues during shaving due to upper resistance forces that cause the razor head to disengage from the handle, leading to incomplete shaving.
Innovation Solution
A razor design featuring a pair of elastic arms with hooks and pivoting axles that engage the razor head, utilizing a symmetrical M-shaped structure and tilted hooks to prevent disengagement by generating torques that keep the razor head securely attached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional buckle is used to connect the razor head to the handle, then the structure is simple, but the razor head disengages during shaving due to upper resistance force
Solution Approach 1:
The fastener is divided into two separate elastic arms (left and right) instead of a single buckle structure. Each arm independently engages with the razor head through its own hook and pivoting axle, distributing the connection forces and preventing disengagement during shaving operations.
Solution Approach 2:
The elastic arms are designed to be flexible and movable, allowing them to dynamically adjust to forces applied during shaving. The elastic material enables the arms to deform under load and return to their original position, maintaining secure engagement despite upper resistance forces.
2Reliability
If the elastic arms are positioned closer to the pivoting axles, then the structure is more compact, but the torque generated to prevent disengagement is insufficient
Solution Approach 1:
The abutment areas are positioned laterally between the left and right planes (in the X-axis direction) rather than simply extending the elastic arms in the Y-axis direction. This lateral positioning of the abutment areas creates effective torque arms that generate sufficient preventing torque without excessive overall length.
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
The design effectively prevents the razor head from disengaging during shaving, enhancing the reliability and convenience of the shaving process by maintaining a secure connection between the razor head and handle.
Implementation Method 1
an elastic fastener adapted for connecting the razor head to the handle includes: a left elastic arm and a right elastic arm
Implementation Method 2
a left pivoting axle is provided at a lower end of the left elastic arm and adapted for connecting with the handle
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Disclosed is an elastic fastener (100) for a shaver, the elastic fastener comprising a left elastic arm (10), a right elastic arm (20), and a connecting arm (30) for connecting the left elastic arm (10) and the right elastic arm (20) together to form one piece. A left pivoting part (11) is provided at a lower end of the left elastic arm (10) to connect with the handle, and a central pivoting line (12) of the left pivoting part (11) is arranged in a Z-axis direction, a left hook (13) is extended at an upper end of the left elastic arm (10) in the X-axis direction to engage with the razor head; a right pivoting part (21) is provided at a lower end of the right elastic arm (20) to pivotally connect with the handle, and a central pivoting line (11) of the right pivoting part (21) is arranged in the Z-axis direction, a right hook (23) is extended at an upper end of the right elastic arm (20) in the X-axis direction to engage with the razor head. A left plane (P1) and a right plane (P2) vertical to an X axis are defined, the central pivoting line (12) of the left pivoting part (11) is located in the left plane (P1), the central pivoting line (22) of the right pivoting part (21) is located in the right plane (P2), and abutment areas of the left hook (13) and the right hook (23) abutted against the razor head during shaving are located in a space sandwiched between the left plane (P1) and the right plane (P2), so as to prevent a razor head from disengaging from a handle during shaving and ensure the reliability of shaving.