Gripping Sleeve Application Device Axial Locking
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Solution Overview
Problem
Conventional application devices, such as brushes, lack protection for their application elements during storage and transport, leading to potential damage from external influences.
Innovation Solution
An application device with a handle-shaped shaft and a coaxially enclosing gripping sleeve that can be axially displaced into a rest position to protect the application element and a working position for use, featuring a detachable latching connection to secure the sleeve in place, eliminating the need for a separate protective cap and enhancing ergonomic handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate protective cap is used to protect the application element, then the application element is protected during storage and transport, but the device complexity increases and additional components may get lost
Solution Approach 1:
The gripping sleeve is designed to perform dual functions: serving as both the handle for holding the applicator device and as the protective cap for the application element. This merging of functions eliminates the need for a separate protective cap, reducing device complexity while maintaining protection reliability
Solution Approach 2:
The gripping sleeve is designed as a multi-functional component that provides both ergonomic handling and protection of the application element. By making the gripping sleeve universal for both purposes, the patent eliminates additional components and potential loss of separate protective caps
2Ease of operation
If the gripping sleeve is made detachable with latching connection, then the ergonomic handling is improved, but the device complexity increases
Solution Approach 1:
The shaft is divided into front and rear sections with different locking mechanisms. The front section has a first locking lug for automatic engagement, while the rear section has a second locking lug for manual release. This segmentation allows ergonomic handling while controlling complexity through differentiated design
Solution Approach 2:
The first locking lug is designed to automatically engage with the locking element when the gripping sleeve is assembled, eliminating the need for additional manual operation. The locking mechanism serves itself through the assembly process, improving ease of operation without proportionally increasing complexity
3Stability of the object's composition
If the second locking lug protrudes further than the first locking lug, then the locking connection stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The first and second locking lugs are designed with asymmetric protrusion distances. The second locking lug protrudes further to provide enhanced stability in the working position, while the first locking lug has minimal protrusion for automatic engagement. This asymmetric design optimizes stability while the simple geometric differences keep manufacturing precision requirements manageable
Data Source
Figure 1~2
Figure 3~6
Figure 5
AI summary
The device (2) has a gripping sleeve (10) movable in a normal position and a working position (14). The sleeve envelops an application element (8) i.e. brush, in the normal position. The sleeve is fixed at a pipe like shaft (4) in an axial direction by a detachable detent connection in the working and normal positions. A rear end (16) of the shaft includes a detent projection projecting from a surface of the shaft. The detent projection in the working position and another detent projection in the normal position are engaged by a detent element of the sleeve.