Weighing Machine Draft Shield Fastening Mechanism
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Solution Overview
Problem
Existing scales with draft protection devices have complex and difficult-to-clean mechanics, increased overall height, and compromised ergonomics due to the need for intricate locking slides and guides, which hinder user-friendliness and precision weighing.
Innovation Solution
A simple and easy-to-clean fastening device is implemented, where the wind protection device is centrally attached to the load introduction passage with a two-part fastening system, featuring a bayonet catch or similar mechanism, allowing for tool-free detachment and easy cleaning, and optionally incorporating a metallic base plate for grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking slide with guide is used to fix the draft protection device to the scale housing, then the draft protection device is securely fixed, but the overall height of the scale increases and cleaning becomes difficult
Solution Approach 1:
The fastening device is divided into two separate parts: a first part integrated into the scale housing at the opening edge, and a second part integrated into the draft protection device bottom. This segmentation eliminates the need for complex locking slides and guides, reducing overall height while maintaining secure fixation through the interaction of the two parts.
Solution Approach 2:
The complex locking slide mechanism and its guide are completely removed from the design. Instead, a simplified two-part fastening system is implemented where the first part remains in the scale housing and the second part is attached to the draft protection device, eliminating the harmful complex mechanics while preserving the fixation function.
2Reliability
If a locking slide mechanism is used to attach the draft protection device, then secure fixation is achieved, but the scale requires dismantling for thorough cleaning
Solution Approach 1:
By separating the fastening function into two independent parts (first part in housing, second part in draft protection device), the design eliminates internal guides and complex mechanisms that trap dirt. The simplified structure allows for easy removal and cleaning of all components without dismantling.
Solution Approach 2:
The locking slide and its guide are completely extracted from the design. The remaining two-part fastening system consists of simple elements that can be easily removed and cleaned, eliminating the cleaning difficulties associated with complex internal mechanisms.
3Reliability
If the draft protection device is fixed with a locking slide, then the connection is secure, but the overall height of the scale increases
Solution Approach 1:
The fastening system is segmented into two thin parts: the first part integrated into the scale housing opening edge and the second part integrated into the draft protection device bottom. This segmentation allows for a compact design with minimal added height while maintaining secure connection through the interaction of the two parts.
Solution Approach 2:
The thick locking slide mechanism is completely removed. Instead, a minimal-height two-part fastening system is implemented where the first part and second part interact to provide secure fixation without adding significant height to the scale structure.
4Ease of operation
If a bayonet catch mechanism is used for the fastening device, then easy detachment for cleaning is achieved, but additional components are required
Solution Approach 1:
The fastening device is segmented into exactly two parts: the first part in the scale housing and the second part in the draft protection device. This minimal segmentation provides easy detachment through simple rotational movement while keeping the number of components to the absolute minimum required for the bayonet catch mechanism to function.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The balance (1) has a housing (2) for accommodating functional elements. A load-introducing member (4) is passed through an opening (3) formed on a top side of the housing. An opening (7) is formed corresponding to the opening (3) when the housing and a draft shield arrangement (5) are connected. The draft shield arrangement is separated from a fastening arrangement (8), and a rim is provided in the opening (3). Two parts (8', 8'') of the fastening arrangement are connected in a form-locking connection, where the part (8'') is arranged at the opening (7) of the draft shield arrangement.