Plate-Shaped Reset Element in Electrical Brush Handpiece
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical brush handpieces face challenges in optimizing space efficiency, reset behavior, and sealing between the frame unit and housing, while also achieving optimal cleaning performance and motor actuation.
Innovation Solution
The electrical brush handpiece features a plate-shaped reset element made from a metal sheet, integrated into a frame unit that extends axially over the drive unit, with a rotor-driven interface for oscillating movement, and a sinus-shaped motor actuation for improved cleaning performance, along with a compact and symmetrical design for easy assembly and mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional reset element is used in the drive unit, then the rotor can be reset, but the space requirements and device complexity increase
Solution Approach 1:
The reset element is integrated directly into the rotor structure, merging two previously separate components (reset element and rotor) into a single unified component. This reduces the overall space requirements and simplifies the device structure while maintaining the reset function.
Solution Approach 2:
The rotor is designed to serve multiple functions: it acts as both the rotating component that drives the interface and as the reset element that autonomously returns to its initial position. This multi-functionality eliminates the need for a separate reset mechanism, reducing space and complexity.
2Reliability
If the frame unit is extended axially over the drive unit, then the sealing between frame unit and housing is improved, but the length of the handpiece increases
Solution Approach 1:
The frame unit is designed with a flexible or adjustable axial extension that can adapt to different sealing requirements without significantly increasing the overall handpiece length. This dynamic design allows the frame unit to extend only as much as necessary for effective sealing.
Solution Approach 2:
The frame unit incorporates flexible sealing elements or thin film structures that can deform to create effective seals between the frame unit and housing, eliminating the need for extensive axial extension and thus maintaining a compact handpiece length.
3Volume of stationary object
If a plate-shaped reset element is used, then the space requirements are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The reset element is designed with optimized geometric parameters and material properties that reduce sensitivity to manufacturing tolerances. By carefully selecting thickness, width, and material stiffness, the plate-shaped element achieves reliable reset behavior even with standard manufacturing precision.
Solution Approach 2:
The plate-shaped reset element is made from composite materials or specially treated metals that provide both the required mechanical properties and tolerance to manufacturing variations, ensuring consistent reset performance while maintaining compact dimensions.
4Productivity
If sinus-shaped motor actuation is implemented, then the cleaning performance is improved, but the device complexity increases
Solution Approach 1:
The motor actuation uses periodic sinus-shaped pulses to drive the rotor, creating the desired oscillating cleaning motion. This periodic action achieves superior cleaning performance through controlled vibration and oscillation while using simple pulse-width modulation techniques that don't significantly increase device complexity.
Solution Approach 2:
Complex mechanical transmission mechanisms are replaced with direct electromagnetic actuation of the rotor through sinus-shaped current pulses. This substitution simplifies the overall device structure while maintaining or improving cleaning performance through precise electrical control of the motor.
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 configuration ensures reliable and autonomous resetting of the rotor, compact design, and enhanced cleaning performance with improved sealing and reduced space requirements, allowing for efficient and comfortable operation.
Implementation Method 1
at least one reset element that is coupled with the rotor with a first end in a rotationally fixed manner and is fixated to the frame unit with a second end in a rotationally fixed manner
Implementation Method 2
the drive unit is in particular implemented of a motor. The drive unit in particular comprises an electromotor
Data Source
AI summary
An electrical brush handpiece, in particular toothbrush handpiece, includes at least one interface for a coupling with a plug-on brush, includes at least one frame unit and includes at least one drive unit for driving the interface which is accommodated in the frame unit, the drive unit including at least one rotor and at least one reset element that is coupled with the rotor with a first end in a rotationally fixed manner and is fixated to the frame unit with a second end in a rotationally fixed manner, wherein the at least one reset element is implemented so as to be plate-shaped.