Serving Tongs Rear Locking Mechanism for Clean Operation
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Solution Overview
Problem
Existing serving tongs with locking mechanisms located in front of the pivot axis are prone to contamination and mechanical impairment due to splashes of sauce or salad dressing, leading to unreliable operation and laborious cleaning.
Innovation Solution
The locking mechanism is positioned behind the pivot axis, with a slot in one tong limb and a locking pin guided by a cam on the other, allowing for reliable locking and unlocking by pivoting the tongs vertically, preventing accidental locking when gripping food.
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 contamination from food, sauce, or salad dressing
Solution Approach 1:
The locking mechanism is repositioned from the front of the pivot axis to the rear side, utilizing the spatial dimension behind the pivot axis. This dimensional relocation places the locking mechanism in a region that is naturally protected from food and sauce contamination during normal serving operations, while still remaining accessible for user operation when needed.
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 locking mechanism requires laborious cleaning and maintenance
Solution Approach 1:
By relocating the locking mechanism to the rear side of the pivot axis, the design exploits the spatial arrangement to naturally shield the mechanism from food contact zones. This eliminates the need for frequent and laborious cleaning operations, as the locking mechanism remains in a clean environment during serving activities.
3Ease of operation
If the locking mechanism is arranged in front of the pivot axis, then the locking mechanism is readily accessible, but the locking effect can be impaired by dirt and debris
Solution Approach 1:
The locking mechanism is positioned in the rear dimension behind the pivot axis, creating a protected zone that is separated from the food handling area. This spatial separation ensures that dirt, debris, and food particles do not interfere with the locking pin's movement or the cam's engagement, maintaining consistent and reliable locking functionality over extended use.
4Object-affected harmful factors
If the locking mechanism is positioned behind the pivot axis, then the locking mechanism is protected from contamination, but the locking mechanism may be less accessible for operation
Solution Approach 1:
While the locking mechanism is positioned behind the pivot axis for protection, the design ensures that this rear positioning does not compromise accessibility. The locking pin and cam are arranged such that users can still easily engage and disengage the locking mechanism by natural hand movements during serving, combining protection with operational ease.
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 arrangement keeps the locking mechanism clean and functional, ensuring consistent operation even when soiled, and maintains a clean appearance by hiding the mechanism in the side view.
Implementation Method 1
a spring (18) to prestress the tong limbs (12, 14) into an open position of the serving tongs
Implementation Method 2
Locking and unlocking of the tong limbs takes place by simply pivoting the serving tongs into a substantially vertical position with the tong limbs approaching one another
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A serving tong (10) comprises two tong arms (12, 14) pivotally connected to each other about a pivot axis (15), which are designed at their front ends (12a, 14a) for grasping food, a spring (18) to bias the tong arms (12, 14) into an open position of the serving tong (10), and a locking mechanism (20) to lock the tong arms (12, 14) in a closed position of the serving tong (10) against the bias of the spring (18). The first tong arm (12) includes an elongated hole (22) in which a locking pin (24) is movably guided, and the second tong arm (14) has a locking cam (26) which contacts the locking pin (24) in the locked closed position of the serving tong (10).The locking and unlocking of the tongs handles (12, 14) is achieved by simply pivoting the serving tongs (10) into a substantially vertical position with the tongs handles approaching each other. Furthermore, the locking mechanism (20) is located behind the pivot axis (15) of the tongs handles (12, 14) when viewed from a front end (12a, 14a).