High-Pressure Spray Gun Quick-Connect Locking Bracket
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Solution Overview
Problem
Existing high-pressure spray guns require complex configurations to connect and disconnect liquid supply lines from the valve, making the process cumbersome and inefficient.
Innovation Solution
A high-pressure spray gun design featuring a non-displaceable safety bracket with two safety sections that can be inserted into diametrically opposite lateral openings of the inlet channel to grip the plug-in nipple, which can be easily released and locked using a spring-elastic actuating element, allowing for simple connection and disconnection of the liquid supply line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fastening nut is used to secure the quick-connect fitting in the inlet channel, then the connection is secure and reliable, but the design becomes more complex and the operation becomes cumbersome
Solution Approach 1:
The locking bracket is divided into two separate locking sections that can independently engage with the plug nipple. This segmentation allows each section to be actuated separately by the push button, simplifying the overall locking mechanism while maintaining secure connection. The two locking sections can be inserted into diametrically opposed lateral openings of the inlet channel to engage behind the plug nipple
Solution Approach 2:
The locking sections are designed to be movable rather than fixed, allowing them to be spring-elastically spread apart by the actuating element and then automatically return to their locking position. This dynamic design enables easy connection and disconnection operations while maintaining reliable locking during use
2Reliability
If a U-shaped clamp is used to secure the high-pressure hose, then the connection is secure, but an additional fluid channel and metal sleeve are required, increasing device complexity
Solution Approach 1:
The locking bracket integrates multiple functions into a single component: it provides axial fixation of the plug nipple, engages with the circumferential collar, and works with the spring element for automatic locking. This merged design eliminates the need for separate metal sleeves and complex clamping mechanisms while maintaining secure connection
Solution Approach 2:
The spring element automatically returns the locking sections to their locking position after being actuated, providing self-service locking without requiring additional actuators or complex mechanisms. The system locks itself upon release of the push button, simplifying the overall structure
3Device complexity
If the locking sections are fixed in position, then the structure is simple, but the plug nipple cannot be easily connected or disconnected
Solution Approach 1:
The locking sections are designed to be movable rather than fixed, allowing them to be spring-elastically spread apart by the actuating element and then automatically return to their locking position. This dynamic design enables easy connection and disconnection operations while maintaining reliable locking during use
Solution Approach 2:
The push button acts as an intermediary element that transfers the user's actuating force to the locking sections through wedge surfaces. This intermediary mechanism allows easy actuation of the locking sections without requiring direct manipulation of the locking sections themselves, simplifying the operation while maintaining structural simplicity
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 simplifies the handling of connecting and disconnecting the liquid supply line, providing a more user-friendly and efficient method for attaching and detaching the high-pressure hose from the valve, while maintaining a secure fixation.
Implementation Method 1
a spring element (58) which connects the two locking sections (54, 55) and which exerts a spring force on the locking sections (54, 55) directed towards one another
Implementation Method 2
the two locking sections (54, 55) can be moved from their locking position... to a release position... by means of an actuating element (65) slidably arranged in the housing
Implementation Method 3
the actuating element (65) forms a wedge that can be inserted between the two locking sections (54, 55). The actuating element (65) comprises two wedge surfaces (67, 68) oriented obliquely to one another
Data Source
Figure 1
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AI summary
The invention relates to a high-pressure spray gun (10) for a high-pressure cleaning device, with a housing (11), in which a valve (24) is arranged, with an inlet and outlet channel (30) and with a closing element, which can be placed in a sealing manner against a sealing face arranged between the inlet and outlet channel (30) and which acts together with a hand-operated lever (34), wherein an insert nipple can be inserted into the inlet channel and fixed in an axially displaceable manner for the connection of a liquid supply line. In order to develop the high-pressure spray gun (10) in such a way that a liquid supply line can be connected to the valve (24) and disconnected from it in an easy way, it is proposed according to the invention that the high-pressure spray gun (10) comprises an undisplaceable securing clip, with two securing portions, which can be introduced into diametrically opposed lateral openings of the inlet channel to engage behind the insert nipple and can be spread resiliently apart by means of an actuating element arranged displaceably in the housing (11).