Serving Tongs Locking Mechanism Kept Clean Behind the Pivot
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Solution Overview
Problem
Existing serving tongs with locking mechanisms arranged in front of the pivot axis are prone to soiling and malfunction when used with food products, requiring complex cleaning and potentially impaired functionality.
Innovation Solution
The locking mechanism is relocated behind the pivot axis, with the elongated hole and locking pin arrangement allowing for reliable operation even when soiled, and ensuring the mechanism remains out of contact with food products, facilitating easy cleaning and maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the locking mechanism is arranged in front of the pivot axis, then the locking mechanism is easily accessible for operation, but the locking mechanism is prone to soiling from food products and requires complex cleaning
Solution Approach 1:
The locking mechanism is inverted from its conventional position in front of the pivot axis to a position behind the pivot axis. This inversion relocates the locking mechanism to a region that is naturally protected from food products during normal use, eliminating soiling issues while maintaining operational reliability through the elongated hole design that allows gravity-assisted locking/unlocking
Solution Approach 2:
The locking mechanism utilizes the spatial dimension behind the pivot axis, creating a three-dimensional arrangement where the locking pin moves along an elongated hole that extends in a direction parallel to the pivot axis. This dimensional arrangement allows the locking mechanism to operate reliably without being exposed to food products in the front gripping region
2Ease of operation
If the locking mechanism is arranged in front of the pivot axis, then the locking mechanism can be easily operated, but the cleaning of the locking mechanism becomes awkward and time-consuming
Solution Approach 1:
By inverting the locking mechanism to behind the pivot axis, the design eliminates the need for frequent and time-consuming cleaning operations. The locking mechanism in its new position is naturally protected from food products, requiring minimal maintenance and cleaning time while preserving easy operation through the gravity-assisted locking/unlocking mechanism
3Ease of operation
If the locking mechanism is arranged in front of the pivot axis, then the locking mechanism is accessible, but the functionality may be impaired due to soiling
Solution Approach 1:
The inversion of the locking mechanism to behind the pivot axis protects it from food product contamination, ensuring reliable functionality. The elongated hole design with gravity-assisted operation ensures the locking pin moves smoothly without being affected by soiling, maintaining consistent locking and unlocking performance
Solution Approach 2:
The locking mechanism is extracted from the food-exposed region and placed in a protected region behind the pivot axis. This separation ensures that the locking mechanism operates in a clean environment, preventing food products from interfering with its functionality while maintaining ease of operation through the gravity-assisted design
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
This design ensures consistent and reliable unlocking/locking functionality, preventing soiling and maintaining performance even when used with messy food items, while maintaining a clean and aesthetically pleasing appearance.
Implementation Method 1
a spring (18) in order to prestress the tong limbs (12, 14) into an open position of the pair of serving tongs
Implementation Method 2
the first tong limb (12) comprises an elongated hole (22) in which a locking pin (24) is moveably guided
Implementation Method 3
a locking cam (26) is provided on the second tong limb (14) and, in the locked closed position of the pair of serving tongs, comes into contact with the locking pin (24)
Data Source
AI summary
A pair of serving tongs (10) comprises two tong limbs (12, 14) which are connected to each other in a manner such that they can pivot relative to each other about a pivot axis (15) and are designed at their front ends (12a, 14a) for grasping food products, a spring (18) in order to prestress the tong limbs (12, 14) into an open position of the pair of serving tongs (10), and a locking mechanism (20) in order to lock the tong limbs (12, 14) counter to the prestress of the spring (18) in a closed position of the pair of serving tongs (10). In this case, the first tong limb (12) comprises an elongated hole (22) in which a locking pin (24) is moveably guided, and a locking cam (26) is provided on the second tong limb (14) and, in the locked closed position of the pair of serving tongs (10), comes into contact with the locking pin (24). A locking and an unlocking of the tong limbs (12, 14) takes place here by simple pivoting of the pair of serving tongs (10) into an essentially vertical position with the tong limbs close to each other. Furthermore, the locking mechanism (20) is arranged behind the pivot axis (15) of the tong limbs (12, 14), as viewed from a front end (12a, 14a) of the tong limbs (12, 14).