Hair Trimmer Drive Assembly Latch Mechanism
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Solution Overview
Problem
Existing drive assemblies for hair trimmers driven by rotary or vibrator motors are tedious and time-consuming to assemble due to complex configurations.
Innovation Solution
A simplified drive assembly design featuring a base housing with a blade set support, cam follower with spring retainers and end catches, and a spring tensioner secured by a latch, allowing for easy assembly and maintaining tension without disassembly issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional drive assembly with cam follower, spring and reciprocating blade guide is used, then the hair trimmer functions properly, but assembly becomes tedious and time consuming
Solution Approach 1:
The patent combines the cam follower, spring, and blade guide into a single integrated drive assembly unit that can be installed as one piece. The cam follower is formed with spring retainers and blade guide features integrated into its structure, eliminating the need for separate assembly steps for these components while maintaining all necessary functions.
Solution Approach 2:
The drive assembly is designed as a separable module that can be easily removed and installed as a complete unit. The latch mechanism allows the entire drive assembly to be secured with a single engagement action, enabling quick replacement without complex disassembly of individual components.
2Stability of the object's composition
If a traditional drive assembly configuration is used, then the components can be secured, but assembly and disassembly becomes complex and time consuming
Solution Approach 1:
The spring-loaded cam follower design allows the assembly to self-secure when installed. The spring automatically engages the cam follower with the blade guide, and the latch mechanism self-locks when engaged, eliminating the need for complex fastening procedures or specialized assembly tools.
Solution Approach 2:
The latch acts as an intermediary securing mechanism that simplifies the connection between the drive assembly and housing. Instead of requiring multiple fasteners or complex alignment procedures, the single latch engagement provides secure fixation while maintaining ease of assembly and disassembly.
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
Facilitates quick and secure assembly of hair trimmer components, preventing the drive assembly from disassembling when blades are removed for maintenance, and simplifies the fabrication and installation process.
Implementation Method 1
A spring has elongated legs and a tension arm. The tension arm presses against a spring tensioner, and the elongated legs extend under the spring retainers and into the spring end catches in the cam follower.
Implementation Method 2
The spring tensioner secures the tension arm towards the blade set support so that the spring is under tension.
Data Source
AI summary
A hair trimmer has a base housing and a blade set having a stationary blade and a reciprocating blade. The base housing has a blade set support at one end. The support has a pair of spaced blade set support projections. A cam follower has spaced spring retainers near a bottom of the cam follower, and spaced spring end catches near an upper edge of the cam follower. A spring has elongated legs and a tension arm. The elongated legs extend under the spring retainers and into the spring end catches in the cam follower. A spring tensioner is secured in the base housing by a latch that engages a tensioner catch. The spring tensioner secures the tension arm so that the spring is under tension.