Hand-held blender
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Solution Overview
Problem
Hand-held blenders typically offer only a single stirring speed, leading to inefficient food mixing due to either excessive speed damaging nutritional ingredients or insufficient speed requiring prolonged mixing times, and existing multi-speed models often rely on unstable voltage changes, lacking versatility and convenience.
Innovation Solution
A hand-held blender design featuring a shift lever and active connector system that allows for rapid and reliable speed conversion between high and low speeds through a deceleration component and interchangeable output connectors, enabling the same stirring part to operate at multiple speeds and supporting multifunctional use with different attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand-held blender is designed with small dimensions to reduce user fatigue, then ease of operation is improved, but device complexity increases when adding speed conversion mechanisms
Solution Approach 1:
The speed conversion mechanism is segmented into modular components: a shift lever for speed selection, a connector for engaging different gears, and a planetary gear system. Each component performs a specific function and can be independently manufactured and assembled, reducing overall device complexity while enabling multiple speed outputs in a compact hand-held blender.
2Productivity
If hand-held blender provides only one stirring speed, then device complexity is reduced, but productivity decreases due to inability to meet different food mixing demands
Solution Approach 1:
The blender incorporates a dynamic speed selection system where a shift lever can engage different gear positions (first gear for high speed, second gear for low speed). This dynamic mechanism allows the user to adjust the stirring speed according to different food mixing requirements, significantly improving productivity and versatility without adding excessive complexity.
3Productivity
If voltage is changed to convert speed, then productivity is improved with multiple speeds, but reliability decreases due to unstable voltage control
Solution Approach 1:
The patent replaces the electrical voltage control method with a mechanical speed conversion system. A planetary gear mechanism with different gear ratios is engaged through a shift lever, providing reliable and stable speed conversion through pure mechanical means. This eliminates the instability associated with voltage control while maintaining multiple speed outputs for improved productivity.
Data Source
AI summary
The invention discloses a hand-held blender including a handle, a motor, a switch for controlling the motor, an input shaft configured to rotate synchronously with the rotor of the motor, and an output shaft configured for outputting power to the stirring part. The motor and the switch are arranged in the handle. The output shaft is coaxially arranged under the input shaft. A deceleration component and output connectors are arranged between the input shaft and the output shaft. An active connector and a shift lever are sleeved on the output shaft, and the active connector is controlled by the shift lever so that the active connector can move up and down to selectively joint with different output connectors. The invention is convenient and reliable to change stirring speed in a manner that the active connector is controlled by the shift lever.