Lever Lance Spring Nesting for Durability and Safety
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Solution Overview
Problem
Current lever lances have springs exposed to atmospheric agents and potential foreign objects, leading to reduced durability and user safety issues due to the spring's mechanical connection to the external body.
Innovation Solution
The design encases the elastic element entirely within the tubular body, using a helical compression spring to oppose the shutter's movement, and connects it between the rod and a fixed wall, protecting it from environmental factors and user injury, while allowing for compact and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spring is fixed to the external surface of the body, then the device structure is simple and easy to manufacture, but the spring is exposed to atmospheric agents and foreign objects reducing its durability
Solution Approach 1:
The elastic element is nested within the tubular body, specifically contained in a cavity formed by the wall of the tubular body. This nesting protects the spring from atmospheric agents and foreign objects while maintaining a compact structure, resolving the contradiction between ease of manufacture and durability.
2Device complexity
If the spring is exposed externally, then the device structure is open and simple, but the operator may be pinched by the spring coils creating safety hazards
Solution Approach 1:
The elastic element is contained within the cavity of the tubular body wall, nesting the potentially harmful component within a protective structure. This eliminates the safety hazard of pinching while adding minimal structural complexity.
Solution Approach 2:
The wall of the tubular body acts as an intermediary barrier between the elastic element and the operator. This intermediary structure protects the user from direct contact with the spring coils while allowing the spring to function normally.
3Reliability
If the elastic element is contained entirely within the tubular body, then the elastic element is protected from environmental factors extending its lifespan, but the device structure becomes more complex
Solution Approach 1:
The elastic element is nested within the cavity of the tubular body wall, utilizing the existing structure to provide protection. This nesting approach extends the lifespan of the elastic element while adding minimal structural complexity.
Solution Approach 2:
The wall of the tubular body serves multiple functions: it provides structural support, contains the elastic element for protection, and maintains the overall device integrity. This multi-functionality reduces the need for additional protective structures.
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 solution extends the lifespan of the elastic element, enhances user safety, and maintains the device's compactness and efficiency by shielding the spring from environmental exposure.
Implementation Method 1
an elastic element configured to exert a force on the rod such that the movement of the shutter along the sliding axis from the closed position to the open position must occur in contrast to said force
Implementation Method 2
the elastic element is a helical compression spring
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A lever lance (1) for spraying liquids is described, comprising: a spray nozzle (10), a tubular body (30,35) at one end of which the nozzle (10) is fixed and which is provided with an internal volume (40) in fluid communication with the nozzle (10), a hydraulic connector (45), which is adapted to allow the connection of the lance (1) to a source of liquid to be sprayed, is connected to the tubular body (30,35) and is in fluid communication with the internal volume (40) of the tubular body (30,35), through which it is in fluid communication with the nozzle (10), a rod (50) at least partially contained in the internal volume (40) of the tubular body (30,35), slidingly associated therewith by means of a guide sleeve (55) defining a sliding axis (Y) and which projects from an end of the tubular body (30,35), a shutter (70) fixed to an axial end of the rod (50) and movable together with said rod (50) along the sliding axis (Y) between a closed position, in which it obstructs the nozzle (10) and prevents the liquid from crossing the nozzle, and an open position, in which it does not obstruct the nozzle (10) and allows the liquid to cross it, an elastic element (80) configured to exert a force on the rod (50) such that the movement of the shutter (70) along the sliding axis (Y) from the closed position to the open position must occur in contrast to said force, a lever (100) hinged to the tubular body (30,35) according to a hinge axis R and connected to the rod (50) so that a predetermined rotation of the lever (100) with respect to the hinge axis (R) moves the shutter (70) along the sliding axis (Y) from the closed position to the open position in contrast to the force of the elastic element (80). Wherein the elastic element (80) is contained entirely within the tubular body (30,35).