Semi-automatic device for the grinding of herbs and similar products
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Solution Overview
Problem
Existing herb grinders require users to apply constant rotary force and continuous manual pressure to operate, leading to ergonomic fatigue, especially with harder or fibrous herbs, and lack systems for energy accumulation and return.
Innovation Solution
A semi-automatic herb grinder with an elastic mechanical member that stores potential energy during manual rotation and actively returns it to rotate grinding elements, combined with releasable mechanical couplings to maintain chamber alignment without user pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual pressure is applied continuously to keep grinding chamber parts in contact, then grinding effectiveness is maintained, but user fatigue increases
Solution Approach 1:
The patent introduces a dynamic spring-loaded mechanism that automatically adjusts and maintains contact pressure between grinding chamber parts. The spring (element 4) provides continuous elastic force to keep the grinding surfaces in contact without requiring manual pressure application, transforming a static manual pressure system into a dynamic self-regulating system that eliminates user fatigue while maintaining grinding effectiveness.
Solution Approach 2:
The grinding device becomes self-sufficient in maintaining contact pressure through the spring mechanism. The spring automatically compensates for variations in grinding resistance and part wear, keeping the grinding surfaces in proper contact without external intervention. This self-service characteristic eliminates the need for continuous manual pressure application while ensuring reliable grinding operation.
2Reliability
If constant rotary force is applied to keep grinding elements in motion, then grinding continues, but user effort increases
Solution Approach 1:
The patent implements periodic reciprocating motion of the grinding elements through the spring mechanism. Instead of requiring continuous rotary force, the spring-loaded system creates alternating forward and backward motion cycles, allowing the grinding elements to engage and disengage periodically from the herbs. This periodic action reduces the average force required compared to continuous rotation while maintaining effective grinding through cumulative contact.
Solution Approach 2:
The system transitions from static continuous rotation to dynamic reciprocating motion. The spring mechanism enables the grinding elements to move back and forth automatically, creating a dynamic grinding process that requires less user effort to initiate and maintain compared to traditional continuous rotation systems.
3Reliability
If elastic members are used for pressure or vibration reduction, then structural support is provided, but energy accumulation and return for reducing user effort is not achieved
Solution Approach 1:
The spring mechanism performs preliminary energy storage during the forward stroke when the user applies force. The spring accumulates elastic potential energy as it compresses, preparing to return this energy during the backward stroke. This preliminary action of energy accumulation during part of the cycle enables the spring to assist in the return motion, reducing the effort required for the complete grinding cycle.
Solution Approach 2:
The spring mechanism recovers and returns the energy stored during compression. Instead of dissipating the energy as heat or vibration (as in traditional damping applications), the spring systematically stores elastic potential energy during the compression phase and returns it as mechanical work during the expansion phase, directly contributing to the grinding action and reducing required user effort.
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
Reduces user effort by minimizing the need for continuous rotary force and pressure, optimizing force application through energy storage and return, and ensuring effective grinding of herbs.
Implementation Method 1
an elastic mechanical member (4), configured for a dynamic function of energy accumulation and return... store a significant amount of elastic potential energy when loaded by the manual rotation imparted by the user... actively return this energy, causing the automatic rotation of the grinding elements
Data Source
AI summary
This invention concerns a semi-automatic device for grinding herbs and similar products. More specifically, the model concerns an improved manual device that uses an elastic mechanical member to store and release energy, significantly reducing the physical effort required of the user during the grinding operation, while eliminating the need for continuous manual pressure.