Dual-Chopper Herb Grinder for Whole-Leaf Size Control
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Solution Overview
Problem
Conventional grinding devices are unable to efficiently process whole dry herb leaves and require pre-chopped herbs, leading to increased costs and a lack of freshness in herb preparation, as they are not designed for disposable use and cannot replicate the size of pre-chopped herbs sold in stores.
Innovation Solution
An herb chopper assembly comprising an agitator, upper chopper, lower chopper, and bottle with staggered teeth and dispensing holes, allowing whole herbs to be ground into a consistent size matching pre-chopped herbs, with the agitator facilitating herb passage and the choppers' teeth arrangement ensuring efficient chopping and size control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional grinding devices are used to process herbs, then the device can grind spices or pre-chopped leaves, but it cannot efficiently process whole dry herb leaves because they are too large for the grinding mechanism
Solution Approach 1:
The device segments the chopping function into two distinct stages: a coarse chopping stage with a first chopper that has larger cutting elements to handle whole herb leaves, and a fine grinding stage with a second chopper that has smaller cutting elements to achieve the desired final particle size. This segmentation allows the device to process whole leaves efficiently while still producing uniformly ground herbs.
2Ease of operation
If conventional grinding devices are used, then grinding can be performed, but the devices require pre-chopped leaves which increases cost and reduces freshness compared to chopping whole herbs immediately before use
Solution Approach 1:
The device employs a single rotating impeller that dynamically interacts with both the first and second choppers during operation. The impeller rotates within the housing and sequentially engages herbs with the coarse chopping elements first, then progresses to the fine grinding elements, providing dynamic multi-stage processing without requiring multiple separate mechanisms or complex multi-axle systems.
3Manufacturing precision
If a single chopper design is used, then the device structure is simpler, but it cannot produce consistent herb particle sizes matching pre-chopped herbs sold in stores
Solution Approach 1:
The first chopper is equipped with larger cutting elements positioned to perform coarse chopping of whole leaves, while the second chopper features smaller cutting elements arranged to perform fine grinding. Each chopper zone is locally optimized for its specific function, with the cutting element sizes and spacing tailored to achieve the appropriate particle size reduction at each stage, resulting in consistent final herb particle sizes.
Data Source
AI summary
An herb chopper includes a bottle, an upper chopper, a lower chopper, an agitator, and a dust cap. The bottle can hold a herb to be ground. The upper chopper is positioned inside of and opposite to the lower chopper and can rotate with respect to the lower chopper. The bottle is positioned on the upper chopper partially inside of the lower chopper. The bottle is rotated relative to the lower chopper causing the herb leaves to be chopped by the upper and lower choppers and dispensed out of the chopper through dispensing holes formed in the lower chopper.