Hand-held grinder
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Solution Overview
Problem
Existing hand-held grinders face inconvenience and cumbersome adjustment due to the need to operate with a gear at the bottom, limiting the ease of adjusting grind fineness.
Innovation Solution
A hand-held grinder design featuring an adjusting ring that threadedly connects to the cartridge, allowing the adjustment of the height difference between the outer and inner grinding heads by rotating the adjusting ring, thereby adjusting grind fineness conveniently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gear is provided at the bottom of the grinder for adjustment, then the grind fineness can be adjusted, but the operation becomes inconvenient and the adjustment is cumbersome due to limited bottom space
Solution Approach 1:
The patent inverts the traditional adjustment mechanism location from the bottom of the grinder to the top. The adjusting ring is now positioned on the top cover, allowing users to adjust grind fineness by rotating the ring at the top rather than accessing a gear at the bottom. This inversion makes the adjustment more convenient and accessible while maintaining the grinding function.
Solution Approach 2:
The patent introduces an adjusting ring as an intermediary component between the user's hand and the grinding mechanism. This ring, with its threaded connection to the cartridge, serves as a mediator that translates rotational motion into vertical displacement of the inner grinding head, thereby adjusting the gap between grinding heads without requiring direct access to complex internal gears.
2Ease of operation
If the adjusting ring is threadedly connected to the cartridge, then the height difference between grinding heads can be adjusted smoothly, but the structure becomes more complex
Solution Approach 1:
The patent replaces a complex mechanical gear system with a simpler threaded connection system. The adjusting ring threads directly into the cartridge, converting rotational motion into linear displacement of the inner grinding head. This substitution eliminates the need for complex gear mechanisms while providing smooth, incremental adjustment of the grinding head height difference.
3Ease of operation
If the inner grinding head is connected to the top cover through the connecting rod, then the adjustment operation is convenient, but the structural stability may be affected
Solution Approach 1:
The patent segments the connection between the top cover and the inner grinding head into multiple components: the top cover, the adjusting ring, the connecting rod, and the inner grinding head. This segmentation allows each component to perform its specific function - the adjusting ring provides adjustment, the connecting rod transmits motion, and the grinding head performs grinding - while maintaining overall structural stability through proper distribution of forces and movements.
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
Enables smooth and convenient adjustment of grind fineness through the rotating adjusting ring, improving operational ease and ensuring stable rotation of the grinding mechanism.
Implementation Method 1
the adjusting ring is threadedly connected to the cartridge; the adjusting ring is configured to drive the connecting rod to move up, thereby adjusting a height difference between the outer grinding head and the inner grinding head
Data Source
AI summary
A hand-held grinder includes a cartridge with an inner cavity, where an adjusting ring is provided on the cartridge; the adjusting ring is sleeved on the cartridge; the adjusting ring is threadedly connected to the cartridge; a mounting sleeve and a grinding assembly are provided in the cartridge; the grinding assembly includes an outer grinding head and an inner grinding head; the outer grinding head is fixedly connected to the cartridge; the inner grinding head is connected to a top cover through a connecting rod; the connecting rod extends through the mounting sleeve; at least one first connecting plate is provided between the mounting sleeve and the cartridge; two ends of the first connecting plate are respectively connected to an outer wall of the mounting sleeve and an inner wall of the cartridge; and the connecting rod is connected to the inner grinding head.