Double Windshield Balance with Linked Sliding Doors
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Solution Overview
Problem
Existing balances with double windshields require separate opening and closing operations for inner and outer windshields, leading to increased air inflow and reduced repeatability, and their mechanical transmission mechanisms complicate the design and increase size.
Innovation Solution
A balance with a double windshield featuring a linkage mechanism that links the sliding doors of the inner and outer windshields on the same lateral surface to move in the same direction, allowing simultaneous opening and closing, reducing air inflow and improving repeatability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a rack and pinion gear mechanism is provided to automatically open and close the inner windshield, then the opening and closing operation is automated, but the device complexity increases and the windshield size increases
Solution Approach 1:
The patent removes the complex rack and pinion gear mechanism from the double windshield structure, extracting only the essential interlocking function. The sliding doors are designed with complementary protrusions and recesses that directly engage with each other, eliminating the need for separate driving force transmission components while maintaining automated interlocking operation.
Solution Approach 2:
The patent merges the interlocking function with the sliding door structure itself. The protrusion and recess are integrated into the door frames, combining the linkage mechanism with the door assembly rather than being separate components, thereby reducing overall device complexity while maintaining automation.
2Adaptability or versatility
If the inner and outer windshields are opened and closed separately, then each windshield can be controlled independently, but the operability deteriorates and air inflow increases
Solution Approach 1:
The patent merges the operation of inner and outer windshields through interlocking sliding doors. When one door is opened or closed, the interlocking mechanism automatically causes the other door to move in the same direction, combining two operations into one action while maintaining the ability to control either door independently when needed.
Solution Approach 2:
The interlocking mechanism acts as an intermediary between the inner and outer windshield operations. The protrusion and recess engagement serves as a mediator that transmits motion from one door to the other, enabling coordinated operation without requiring separate control mechanisms.
3Adaptability or versatility
If the opening and closing period of windshields is extended, then operational flexibility is improved, but air inflow increases and repeatability deteriorates
Solution Approach 1:
The patent enables rapid opening and closing of windshields through the interlocking sliding door mechanism. The coupled doors can be opened or closed quickly in a single motion, minimizing the time the windshields remain open and reducing air inflow, thereby maintaining weighing repeatability while preserving operational flexibility when needed.
Data Source
AI summary
The balance includes the double windshield including an inner windshield that covers a weighing pan, and an outer windshield that covers the inner windshield, the respective windshields include sliding doors openable and closable on a lateral surface, a pair of engagement members configured to link sliding doors positioned on the same lateral surface side of the respective windshields so as to move in the same direction are provided, a protrusion is provided on one engagement member, and a recess is provided in the other engagement member, the protrusion is configured to enter into and exit from the recess, when the protrusion enters into the recess, the pair of engagement members is brought into an engaged state, and in such an engaged state, the sliding doors are linked together to be capable of opening and closing simultaneously.