Pressure Cleaner Spray-Out Device With Differential Release Forces
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Solution Overview
Problem
Existing pressure cleaning devices face issues with unintentional release of connecting devices, leading to accidental detachment of components, which complicates usage and efficiency.
Innovation Solution
The ejection device employs distinct release forces for the base and head connection devices, ensuring the head connection device releases first, thereby preventing accidental detachment of the lance from the base body during ejection head removal, and incorporates bayonet locks and securing elements to maintain secure connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base connection device and head connection device have the same release force, then both connection devices can be released with equal ease, but unintentional release of the base connection device may occur when the head connection device is being removed
Solution Approach 1:
The patent applies different release force characteristics to different connection devices: the head connection device is designed with lower release force for easy detachment, while the base connection device is designed with higher release force for secure attachment. This local differentiation of mechanical properties prevents accidental base release while maintaining ease of head removal.
Solution Approach 2:
The patent changes the critical parameter of release force between the two connection devices. The base connection device requires a higher release force (first release force) compared to the head connection device (second release force). This parameter differentiation ensures that when a user applies force to remove the head, the base connection remains secure.
2Reliability
If the base connection device has high release force to prevent accidental release, then reliability improves, but ease of operation for releasing the base connection decreases
Solution Approach 1:
The base connection device incorporates a dynamic release mechanism that responds to the direction and magnitude of applied force. During normal use, the high release force prevents accidental detachment. However, when a deliberate release action is performed (such as pushing the release element in a specific direction), the mechanism dynamically transitions to allow easy release, thus resolving the contradiction between security and ease of release.
3Ease of operation
If the connection devices are designed to be easily released, then ease of operation for component replacement improves, but the risk of unintentional detachment increases
Solution Approach 1:
The patent segments the connection system into two distinct connection devices with different functional characteristics: the head connection device optimized for easy release to facilitate frequent ejection head replacements, and the base connection device optimized for secure attachment to prevent accidental separation. This segmentation allows each connection device to be independently optimized for its specific operational requirements.
Data Source
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AI summary
The invention relates to an ejection device for a pressure cleaning device (1), comprising a base body (10), an ejection head (20) with an ejection opening (21) through which cleaning fluid can be ejected, a lance (30) that can be arranged between the base body (10) and the ejection head (20), a base connection device (40) by means of which the lance (30) can be detachably connected to the base body (10), and a head connection device (50) by means of which the lance (30) can be detachably connected to the ejection head (20). The cleaning fluid can be conveyed from the base body (10), in particular through the lance (30), to the ejection opening (21). The base connection device (40) can be detachable using a base release force. The head connection device (50) can be detachable using a head release force. The base release force and the head release force are of different magnitudes.