Spring-Mounted Motor Carrier Assembly for Simpler Personal Care Motors
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Solution Overview
Problem
Existing motor structures for personal care devices, such as electric toothbrushes, are complex and costly to manufacture, with a need for simplification and improved assembly processes.
Innovation Solution
A motor design featuring a sheet metal motor carrier with folded layers and aligned slots for secure coupling with spring elements, allowing for a strong and efficient connection between the movable motor part and the motor carrier, reducing component complexity and facilitating automated assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional motor structures are used with separate mounting components, then the motor can be assembled, but the device complexity and manufacturing cost increase
Solution Approach 1:
The motor carrier is designed as an integrated sheet metal component that combines the mounting structure with the motor housing. The sheet metal carrier incorporates folded layers and aligned slots directly into its structure, eliminating the need for separate mounting brackets, rivets, or fasteners. This merging of functions reduces the total component count and simplifies the assembly process while maintaining structural integrity for securing the movable motor part.
2Reliability
If multiple separate components are used for mounting, then the connection can be secure, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The sheet metal carrier is pre-formed with folded layers and aligned slots during the manufacturing process. These features are prepared in advance to receive the spring element and movable motor part, allowing for quick and reliable assembly without requiring complex fastening operations. The pre-configured structure ensures proper alignment and secure connection while significantly reducing assembly time and improving productivity.
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 enhances manufacturing simplicity, reduces noise and vibrations, and provides a robust and precise spring constant, while minimizing the need for additional components like rivets, resulting in a more efficient and cost-effective motor assembly.
Implementation Method 1
a spring element that couples the movable motor part with the motor carrier
Data Source
AI summary
A motor and a personal-care device having the motor. The motor has a motor carrier made at least partially from a sheet metal material, a movable motor part, and a spring element that couples the movable motor part with the motor carrier. The sheet metal material comprises at least one coupling area where the sheet metal material is folded so that its two layers are facing each other while each of the two layers comprises a slot, the slots being aligned with one another. A connection extension of the spring element extends through the aligned slots.