Waiter's Knife Spiral Deployment via Leaf Spring Trigger
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Solution Overview
Problem
Existing waiter's knives require the sommelier to put down the wine bottle to unfold the spiral and support, making them difficult to use with one hand and posing risks of injury or complications in movement.
Innovation Solution
A waiter's knife design featuring a rotatably mounted spiral with a V-shaped leaf spring mechanism that allows the spiral to be swung out and folded in without a second hand, using a pivot pin and unlocking pin for easy operation, enabling one-handed use and safe handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the spiral is held in a hand-closed position around the handle, then the waiter's knife has a compact and safe resting position, but the spiral cannot be accessed without changing grip or using the other hand
Solution Approach 1:
The spiral is equipped with a self-swinging mechanism that automatically swings the spiral out from the handle when the trigger is activated. This self-service feature eliminates the need for the user to manually manipulate the spiral with their fingers, enabling one-handed operation while maintaining a compact resting position. The spiral swings out automatically under spring force when released from the trigger constraint.
2Reliability
If a protruding hook is used to hold the spiral back, then the spiral can be securely retained in the handle, but it poses a risk of injury or can get caught in textiles
Solution Approach 1:
The harmful protruding hook is completely removed from the design. Instead, the spiral is retained in the handle through a trigger mechanism that uses a latch system. The trigger holds the spiral in a constrained position during normal use, and when activated, releases the spiral to swing out automatically. This extraction of the harmful element eliminates injury risk while maintaining secure retention through the alternative latch mechanism.
Solution Approach 2:
A trigger mechanism acts as an intermediary between the user's finger and the spiral. Instead of directly manipulating the spiral or using a protruding hook, the user presses the trigger which then controls the spiral's position. This intermediary element provides safe and controlled operation, enabling one-handed use without direct contact with the spiral's moving parts.
3Ease of operation
If the spiral is manually touched and laterally pressed to disengage from the hook, then the spiral can be swung out, but it requires free lateral access and complicated movement
Solution Approach 1:
The manual lateral pressing mechanism is replaced with a trigger-based release system. Instead of requiring the user to apply lateral force to disengage the spiral from a hook, the trigger mechanism uses a latch system that releases the spiral through a simple pressing motion. This substitution transforms a complex lateral manipulation task into a simple forward pressing action, enabling one-handed operation without requiring free lateral access to the spiral.
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 efficient one-handed operation of the spiral, allowing for smooth bottle opening without putting down the bottle, reducing the risk of injury and improving usability in a professional setting.
Implementation Method 1
A V-shaped spring, in this case a leaf spring, is arranged in the handle between the spiral and the center plate
Implementation Method 2
a first pivot pin for the spiral, by which the spiral can be swung out and folded in without a second hand
Data Source
Figure 1~3
Figure 4a~4b
Figure 5a~6b
AI summary
A waiter's corkscrew (1) for one-handed operation is characterized by a spring element, preferably a leaf spring (31) made of spring steel, arranged between the handle (3) and the spiral (5) such that when the spiral (5) is applied to the handle (3), the spring (31) is tensioned and, correspondingly, the spiral (5) swings out of the handle (3) automatically as the spring (31) relaxes. In the folded position, the spiral (5) is held in place by a locking lug (59). The locking lug (59) can be pushed away from the spiral (5) by pressing on an externally accessible release pin (67), thereby releasing the spiral. Preferably, a pivotable support (9) is also provided, which serves to support the waiter's corkscrew (1) against the bottle rim during the second phase of corking. The support (9) has an actuating knob (87) that allows the support (9) to be pivoted out by pressing with a finger.